Re: [time-nuts] Lucent KS-24361 Web Page
Brooke, Following the links from your page (nice work, thank you) lead me to your Thunderbolt page where you ponder the death of your iCruze monitor. If you refer to the picture of the microprocessor board, you will notice that the locations marked D1, D2 and D3 are populated by zero ohm resistors. That means that the 3 V microcontroller was powered from 5V. I am actually amazed that they worked at all, let alone worked for a while. It is a shame that fluke.l saved on the cost of 3 diodes that way. The 1N4148 is $.02 at Mouser in 25 pieces lots. Didier KO4BB On November 18, 2014 8:48:33 PM CST, Kris Keener w...@outlook.com wrote: Nice write up, all of us on bench W enjoyed it. :-) 73, Kris, WT5V -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke Sent: Tuesday, November 18, 2014 4:42 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 Web Page Hi: I've received the components of the Z3810A system and have some 8x10 color glossy photographs with circles and arrows and a paragraph on the back of each one explainin' what each one is for. But need to find the connectors to make up the DC power cables. http://www.prc68.com/I/KS-24361.html Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Sent from my Motorola Droid Razr HD 4G LTE wireless tracker while I do other things. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lucent KS-24361 Web Page
If you refer to the picture of the microprocessor board, you will notice that the locations marked D1, D2 and D3 are populated by zero ohm resistors. That means that the 3 V microcontroller was powered from 5V. I am actually amazed that they worked at all, let alone worked for a while. It is a shame that fluke.l saved on the cost of 3 diodes that way. The 1N4148 is $.02 at Mouser in 25 pieces lots. Didier KO4BB +++ What I did (and I've mentioned this before) is to replace the three zero ohm resistors with one red LED. The forward voltage drop is about 1.7vdc so it makes a pretty nice zener, and you have a power indicator to boot. -Arthur ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] KS-24361 10 Mhz mod interesting document - older KS boxes
Hi The heat gun approach assumes that the fault is a blob of metal that is stuck in a bad location in the bulb. Unfortunately there are a lot of different ways these beasts can die. The repair guys who should know always claimed that bulb issues were 30% of the issues they saw. That was on an earlier generation of Rb’s but I suspect it applies. None of the ones I had arrive DOA were bulb problems. Bob On Nov 20, 2014, at 10:41 PM, Alex Pummer a...@pcscons.com wrote: but there was a description; how to rejuvenate the rubidium bulb by cautiously warning it up, to remelt the rubidium 73 Alex On 11/20/2014 7:31 PM, paul swed wrote: I do agree its subjective. But my gut says bad is 2-3V I know they seem to run above 3. But whatever. When the blinkOmeter counts I am screwed. :-) Time to get the heatgun. Regards Paul. On Thu, Nov 20, 2014 at 9:07 PM, Bob Camp kb...@n1k.org wrote: ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] WWVB format
Glenn I want to say that my simple wwvb clocks are working. However my most finicky one is not locked as I just noted. But then its always a problemed child. The format contains bpsk but that was not supposed to interfere with the traditional AM modulation these clocks detect. I might strongley believe that the various electronic lights that are becoming pervasive is seriously deteriorating the ability to detect the signal. I am near Boston so thats fringe. Regards Paul WB8TSL On Fri, Nov 21, 2014 at 12:06 AM, Glenn Little glennmaill...@bellsouth.net wrote: Are there any atomic clocks that do not properly decode the current WWVB format. I have two that will not auto update the time and will troubleshoot if this is not a format issue. Thanks for any help. 73 Glenn WB4UIV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] WWVB format
Hi Paul, the phase modulation would interfere with the AM, since during the phase change the narrow band crystal filter's output will sink down as the filter is following the phase change, and the time needed for the filter to swing in to the new phase it depend on the angle of the phase change angle, for 180 degree it is 2 x [1/f] x Q , [1/f] x Q needed to swing on and the same time to swing down from the old phase. [[RohdeSchwarz's old Q meter is based on that, it counts the zero crossings until the level of the signal sinks to ]] and that causes an additional AM modulation, if the quartz filter of the clock is not so good, the [1/f] x Q time is shorter and the filter after the demodulator does not let it pass the amplitude change, thus the cheaper clock works better, until one switching mode power supply takes over the control from the WWVB 73 Alex On 11/21/2014 7:17 AM, paul swed wrote: Glenn I want to say that my simple wwvb clocks are working. However my most finicky one is not locked as I just noted. But then its always a problemed child. The format contains bpsk but that was not supposed to interfere with the traditional AM modulation these clocks detect. I might strongley believe that the various electronic lights that are becoming pervasive is seriously deteriorating the ability to detect the signal. I am near Boston so thats fringe. Regards Paul WB8TSL On Fri, Nov 21, 2014 at 12:06 AM, Glenn Little glennmaill...@bellsouth.net wrote: Are there any atomic clocks that do not properly decode the current WWVB format. I have two that will not auto update the time and will troubleshoot if this is not a format issue. Thanks for any help. 73 Glenn WB4UIV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lucent KS-24361 24V DC power requirements
Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
At most you need 2.4A (when the two OCXOs are heating up): a 2.5A supply is needed. On Fri, Nov 21, 2014 at 6:25 PM, planoph...@aei.ca wrote: Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] KS-24361 10 Mhz mod interesting document - older KS boxes
Bob Absolutely lots of ways to die. Such as bad caps, bad variable cap, resistors that are cooked. I am pretty good with all of those and have experienced most of them. But then comes the point of the dirty bulb and it doesn't have to be the blob. Though you will find the blob most likely with the dirty bulb. The darkened window cause a loss in signal and ultimately loss of lock. The heat gun clears both up. Regards Paul WB8TSL On Thu, Nov 20, 2014 at 10:41 PM, Alex Pummer a...@pcscons.com wrote: but there was a description; how to rejuvenate the rubidium bulb by cautiously warning it up, to remelt the rubidium 73 Alex On 11/20/2014 7:31 PM, paul swed wrote: I do agree its subjective. But my gut says bad is 2-3V I know they seem to run above 3. But whatever. When the blinkOmeter counts I am screwed. :-) Time to get the heatgun. Regards Paul. On Thu, Nov 20, 2014 at 9:07 PM, Bob Camp kb...@n1k.org wrote: ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I have not seen my units draw more than 2A each - steady state is about 1.1A. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of planoph...@aei.ca Sent: Friday, November 21, 2014 11:25 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 24V DC power requirements Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
I think Bob mentioned it before Laptop power supplies make good power sources. Older units like in my case an old Dell 20V 3.5 A is perfect. They still have plenty of input and output filtering and build for lomg term operation. Never throw away a laptop supply. Late models are lower power and less filtering. Bert Kehren In a message dated 11/21/2014 4:42:29 P.M. Eastern Standard Time, ar...@antamy.com writes: I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I have not seen my units draw more than 2A each - steady state is about 1.1A. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of planoph...@aei.ca Sent: Friday, November 21, 2014 11:25 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 24V DC power requirements Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for that. I also have the chance to get a 5352B 40 GHz counter for £500. That has GPIB as standard. In the short/medium term I don't see much use for a 40 GHz counter, but I am giving consideration to buying the 40 GHz and selling the 18 GHz one. I would be interested to know if anyone has any opinions on the relative merrits of the two counters. Neither of these counters have ovens, but stability is not a major issue given they take a 10 MHz input. That said, foes anyone know if these take fairly common 10811A ovens? There is a chance I would use it in places where it would not practical to feed in 10 MHz. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
David a free opinion and thats about what its worth. The 5342 counter was a good counter but very old now. I used to use the 5342s for satellite work and always wanted one for home. But given its age circa 1980 I believe, maybe it works or not at all frequencies. I would simply go with the 5352b because at least there is some chance to find parts if needed. As I say not a great answer. Regards Paul WB8TSL On Fri, Nov 21, 2014 at 4:51 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for that. I also have the chance to get a 5352B 40 GHz counter for £500. That has GPIB as standard. In the short/medium term I don't see much use for a 40 GHz counter, but I am giving consideration to buying the 40 GHz and selling the 18 GHz one. I would be interested to know if anyone has any opinions on the relative merrits of the two counters. Neither of these counters have ovens, but stability is not a major issue given they take a 10 MHz input. That said, foes anyone know if these take fairly common 10811A ovens? There is a chance I would use it in places where it would not practical to feed in 10 MHz. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
Hi I have run mine from anything from 22V to 30V and seen no problems. I had trouble on a pair with a 2A 24V supply. The pairs seem to settle down to about 1A at 30V after warmup in my lab. The supplies are rated to 18V input. I would not trust them at that low a voltage. There are some coils running around in the box and voltages into the supply will be lower than at the input pins. Even if you buy the brand new supplies from TRC (or your local MeanWell distributor) a full up supply for a pair is $30. The auction sites are indeed a bit cheaper on some auctions. Bob On Nov 21, 2014, at 12:50 PM, Anthony Roby ar...@antamy.com wrote: I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I have not seen my units draw more than 2A each - steady state is about 1.1A. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of planoph...@aei.ca Sent: Friday, November 21, 2014 11:25 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 24V DC power requirements Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] [hp_agilent_equipment] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
On 21 Nov 2014 23:24, Doug dmcgarr...@optonline.net [hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote: On 11/21/2014 04:51 PM, 'Dr. David Kirkby (Kirkby Microwave Ltd)' drkir...@gmail.com [hp_agilent_equipment] wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A GPIB is not a very popular interface anymore. Let that affect your decision. --dm GPIB has stood the test of time. I suspect it will be around long after USB has gone. In any case, the more modern counters with USB and/or LAN tend to be more expensive. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
Just to clarify, each unit (no more than 2 and steady about 1.1A) or both units together? cheers, Graham ve3gtc On 2014-11-21 12:50, Anthony Roby wrote: I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I have not seen my units draw more than 2A each - steady state is about 1.1A. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of planoph...@aei.ca Sent: Friday, November 21, 2014 11:25 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 24V DC power requirements Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] KS-24361 10 Mhz mod interesting document - older KS boxes
Hi Tearing the physics package apart and putting it back together again can be a bit of a hassle on the small Rb’s … Bob On Nov 21, 2014, at 2:00 PM, paul swed paulsw...@gmail.com wrote: Bob Absolutely lots of ways to die. Such as bad caps, bad variable cap, resistors that are cooked. I am pretty good with all of those and have experienced most of them. But then comes the point of the dirty bulb and it doesn't have to be the blob. Though you will find the blob most likely with the dirty bulb. The darkened window cause a loss in signal and ultimately loss of lock. The heat gun clears both up. Regards Paul WB8TSL On Thu, Nov 20, 2014 at 10:41 PM, Alex Pummer a...@pcscons.com wrote: but there was a description; how to rejuvenate the rubidium bulb by cautiously warning it up, to remelt the rubidium 73 Alex On 11/20/2014 7:31 PM, paul swed wrote: I do agree its subjective. But my gut says bad is 2-3V I know they seem to run above 3. But whatever. When the blinkOmeter counts I am screwed. :-) Time to get the heatgun. Regards Paul. On Thu, Nov 20, 2014 at 9:07 PM, Bob Camp kb...@n1k.org wrote: ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/ mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
Hi A bit over 2A for the pair at turn on. About 1A for the pair after warmup. Bob On Nov 21, 2014, at 6:23 PM, Graham planoph...@aei.ca wrote: Just to clarify, each unit (no more than 2 and steady about 1.1A) or both units together? cheers, Graham ve3gtc On 2014-11-21 12:50, Anthony Roby wrote: I have been using a Universal 24V 5A DC Switching Power Supply from eBay. I have not seen my units draw more than 2A each - steady state is about 1.1A. Anthony -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of planoph...@aei.ca Sent: Friday, November 21, 2014 11:25 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Lucent KS-24361 24V DC power requirements Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] SR620 - any gotchas buying a used one?
After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 10MHz LTE-Lite
what is the ublox application Thanks, Jim wb4...@amsat.org On 11/20/2014 6:17 PM, S. Jackson via time-nuts wrote: Paul, if you set the serial switch on the LTE-Lite over to the NMEA side then the uBlox application will give you all sorts of bar graphs for signal strengths, position, time, etc as it decodes all the NMEA messages. Alex, the TSC5125A user manual contains a description of the theory in its Appendix B. Its probably available on the Microsemi website as I don't think its confidential. Also, I think John's TimePod user manual probably has a description of it. Otherwise I remember Sam Stein (who is behind the TSC units) had some PTTI or similar presentations discussing the technology, but I don't know where those could be downloaded. Bye, Said In a message dated 11/20/2014 14:34:32 Pacific Standard Time, a...@pcscons.com writes: Hi Said, do you have any information about how that TimePod 5330A works any principal description? 73 KJ6UHN Alex On 11/20/2014 2:08 PM, S. Jackson via time-nuts wrote: Hello Mike, attached is a 10MHz DIP-14 TCXO Phase Noise plot from a random LTE-Lite unit. I had sent out a 20MHz typical phase noise plot some weeks ago, and comparing the two they are almost perfectly 6dB apart as would be expected from the 20log(n/m) relationship. There are variations from unit to unit of course, but it does not seem like one version of the board or the other has advantages in terms of phase noise. I had also sent out a superimposed plot of the 20MHz and the divide-by-2 10MHz output of the same board at that time, and again the relationship was almost perfectly 6dB lower at 10MHz versus 20MHz. While phase noise follows theory, it does seem that the DIP14 metal shield has a beneficial effect on the ADEV stability though. The plots we are getting are pretty darn good, and I want to test more boards before I post any ADEV, because its quite a bit better than our specification and I want to make sure its real. The 10MHz DIP-14 boards do not have an isolating buffer like the 20MHz boards do, on these the TCXO drives the output directly, so one must be careful to set the equipment to 1M Ohms input impedance or use a buffer externally, which is what we did to measure the attached PN plot. Bye, Said ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] ocxo
So, I got a reasonable deal on a SR620 ho ho. Know your dealer. The ocxo is out of tolerance. All self tests pass with flying colors, autocal works as well. So the best parts are OK. Does anyone: 1) have a spare Isotemp OCXO36-53 10.000 MHz p/n 6-00051? 2) know the specs, ie the input voltage/current and the control voltage span and direction? pinout? I have some Morion mv-89's and could easily cobble one in if it will work. Apparently a correct oscillator must be in place to use an external source, if I read the manual right. 3) do we have a source for the schematics for the SR 620? The FTS 4060 is up, pumpin' and firmly locked. At least for now. That dealer was not lyin' Much thanks to all of you. The adventure continues -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 10MHz LTE-Lite
U-Center vers 8.12 http://www.u-blox.com/en/evaluation-tools-a-software/u-center/u-center.html Mike --- 73, Mike, N1JEZ A closed mouth gathers no feet On 2014-11-21 18:54, Jim Sanford wrote: what is the ublox application Thanks, Jim wb4...@amsat.org On 11/20/2014 6:17 PM, S. Jackson via time-nuts wrote: Paul, if you set the serial switch on the LTE-Lite over to the NMEA side then the uBlox application will give you all sorts of bar graphs for signal strengths, position, time, etc as it decodes all the NMEA messages. Alex, the TSC5125A user manual contains a description of the theory in its Appendix B. Its probably available on the Microsemi website as I don't think its confidential. Also, I think John's TimePod user manual probably has a description of it. Otherwise I remember Sam Stein (who is behind the TSC units) had some PTTI or similar presentations discussing the technology, but I don't know where those could be downloaded. Bye, Said In a message dated 11/20/2014 14:34:32 Pacific Standard Time, a...@pcscons.com writes: Hi Said, do you have any information about how that TimePod 5330A works any principal description? 73 KJ6UHN Alex On 11/20/2014 2:08 PM, S. Jackson via time-nuts wrote: Hello Mike, attached is a 10MHz DIP-14 TCXO Phase Noise plot from a random LTE-Lite unit. I had sent out a 20MHz typical phase noise plot some weeks ago, and comparing the two they are almost perfectly 6dB apart as would be expected from the 20log(n/m) relationship. There are variations from unit to unit of course, but it does not seem like one version of the board or the other has advantages in terms of phase noise. I had also sent out a superimposed plot of the 20MHz and the divide-by-2 10MHz output of the same board at that time, and again the relationship was almost perfectly 6dB lower at 10MHz versus 20MHz. While phase noise follows theory, it does seem that the DIP14 metal shield has a beneficial effect on the ADEV stability though. The plots we are getting are pretty darn good, and I want to test more boards before I post any ADEV, because its quite a bit better than our specification and I want to make sure its real. The 10MHz DIP-14 boards do not have an isolating buffer like the 20MHz boards do, on these the TCXO drives the output directly, so one must be careful to set the equipment to 1M Ohms input impedance or use a buffer externally, which is what we did to measure the attached PN plot. Bye, Said ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi The counter has a fairly extensive auto-cal / auto test built into it. Simply looping the output back to the input is about all the setup needed. Checking the calibration on the OCXO is the only thing that takes external gear. Past that, yes there are a variety of calibration settings and procedures that can be done to get the counter into perfect shape. Any of them could show up a problem. Doing all that is a bit beyond what I would expect from a normal seller. Bob On Nov 21, 2014, at 6:51 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
Dr. Kirby, The 5242A Option 001 (high stability) used a 10544 oscillator, which. IIRC, is electrically interchangeable with the 10811. The 5352B Option 010 (high stability) uses the 10811 oscillator. Cheers, Dave M Dr. David Kirkby (Kirkby Microwave Ltd) wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for that. I also have the chance to get a 5352B 40 GHz counter for £500. That has GPIB as standard. In the short/medium term I don't see much use for a 40 GHz counter, but I am giving consideration to buying the 40 GHz and selling the 18 GHz one. I would be interested to know if anyone has any opinions on the relative merrits of the two counters. Neither of these counters have ovens, but stability is not a major issue given they take a 10 MHz input. That said, foes anyone know if these take fairly common 10811A ovens? There is a chance I would use it in places where it would not practical to feed in 10 MHz. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] ocxo
Hi I believe that the SR620 uses a “true” 10 MHz OCXO. I would be careful using a 5 MHz doubled to 10 OCXO. The counter may or may not be happy with sub-harmonic induced jitter. Best bet at the specs: +12V power 0-5V EFC Sine wave out +7dbm +/- 5x10^-9 0 to 70C Pinout - trace what you have. Bob On Nov 21, 2014, at 6:59 PM, Don Latham d...@montana.com wrote: So, I got a reasonable deal on a SR620 ho ho. Know your dealer. The ocxo is out of tolerance. All self tests pass with flying colors, autocal works as well. So the best parts are OK. Does anyone: 1) have a spare Isotemp OCXO36-53 10.000 MHz p/n 6-00051? 2) know the specs, ie the input voltage/current and the control voltage span and direction? pinout? I have some Morion mv-89's and could easily cobble one in if it will work. Apparently a correct oscillator must be in place to use an external source, if I read the manual right. 3) do we have a source for the schematics for the SR 620? The FTS 4060 is up, pumpin' and firmly locked. At least for now. That dealer was not lyin' Much thanks to all of you. The adventure continues -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road Huson, MT, 59846 mail: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] [hp_agilent_equipment] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
Hi On Nov 21, 2014, at 6:28 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 21 Nov 2014 23:24, Doug dmcgarr...@optonline.net [hp_agilent_equipment] hp_agilent_equipm...@yahoogroups.com wrote: On 11/21/2014 04:51 PM, 'Dr. David Kirkby (Kirkby Microwave Ltd)' drkir...@gmail.com [hp_agilent_equipment] wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A GPIB is not a very popular interface anymore. Let that affect your decision. --dm GPIB has stood the test of time. I suspect it will be around long after USB has gone. I think I might take that bet. GPIB is pretty narrowly focused. It’s also a very expensive way to do things. It’s main staying power is a function of systems full of legacy gear. Bob In any case, the more modern counters with USB and/or LAN tend to be more expensive. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
I drive my prs10 with a parallel pair of ldos balanced by an op amp. I'll draw it out and post it if you like. On Friday, November 21, 2014, Azelio Boriani azelio.bori...@gmail.com wrote: At most you need 2.4A (when the two OCXOs are heating up): a 2.5A supply is needed. On Fri, Nov 21, 2014 at 6:25 PM, planoph...@aei.ca javascript:; wrote: Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com javascript:; To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com javascript:; To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
I have one of the source locking EIP, which works up to 90GHz, but used only for 60,xx GHz only, they are sometimes relative inexpensive available on e-bay, see here: http://www.ebay.com/itm/EIP-578-MICROWAVE-FREQUENCY-COUNTER-10Hz-TO-90GHz-INCL-SENSOR-/111503803566?pt=LH_DefaultDomain_0hash=item19f62504ae 73 Alex On 11/21/2014 2:29 PM, paul swed wrote: David a free opinion and thats about what its worth. The 5342 counter was a good counter but very old now. I used to use the 5342s for satellite work and always wanted one for home. But given its age circa 1980 I believe, maybe it works or not at all frequencies. I would simply go with the 5352b because at least there is some chance to find parts if needed. As I say not a great answer. Regards Paul WB8TSL On Fri, Nov 21, 2014 at 4:51 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for that. I also have the chance to get a 5352B 40 GHz counter for £500. That has GPIB as standard. In the short/medium term I don't see much use for a 40 GHz counter, but I am giving consideration to buying the 40 GHz and selling the 18 GHz one. I would be interested to know if anyone has any opinions on the relative merrits of the two counters. Neither of these counters have ovens, but stability is not a major issue given they take a 10 MHz input. That said, foes anyone know if these take fairly common 10811A ovens? There is a chance I would use it in places where it would not practical to feed in 10 MHz. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lucent KS-24361 24V DC power requirements
Hi We’ve been around this one before. The KS boxes are powered by a switcher brick inside the box. There’s not a lot of reason go super crazy on the DC input. It’s fully isolated from the case ground. Even leakage / stray grounds should not be an issue in this situation. I would not run it off of raw un-filtered rectifier output. Anything that’s at least got a filter capacitor in it should do fine. Bob On Nov 21, 2014, at 3:19 PM, Neil Schroeder gign...@gmail.com wrote: I drive my prs10 with a parallel pair of ldos balanced by an op amp. I'll draw it out and post it if you like. On Friday, November 21, 2014, Azelio Boriani azelio.bori...@gmail.com wrote: At most you need 2.4A (when the two OCXOs are heating up): a 2.5A supply is needed. On Fri, Nov 21, 2014 at 6:25 PM, planoph...@aei.ca javascript:; wrote: Good day all, I have been following the discussions as best as I could. I recell seeing the question asked or at least theorized as to what is the power requirements of these units - either individually or together. I have reviewed all messages or at least all that I can find in these threads but I couldn't find a definitive answer unless of course the answer is in one of the responses hiding where I haven't looked. I purchased a set of these modules and they are currently in transit but I don't have a 24V DC supply at the moment. So, in order to try and get ahead before the arrival of these modules I would like to at least plan out if not get a suitable power supply ready. I don't want to over specify by too much and worse yet, under specify. Has anyone actually made any power used measurements of these modules? 2A average, 4A peak? Somewhere inbetween or more? cheers, Graham ve3gtc ___ time-nuts mailing list -- time-nuts@febo.com javascript:; To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com javascript:; To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
The SR620's manual is perfect, there is a whole chapter has detail information of performance test. You can use that way for check the counter's condition. Hui Zhang At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi Probably the best information out there on setting up a SR620 is buried in the archives of this list back a few years. The back and forth required on some of the adjustments is far from obvious. You do need to start from the manual and get it as far as the manual will allow. You then go into the “Time Nuts advanced” procedures. Bob On Nov 21, 2014, at 9:19 PM, Hui Zhang ba...@163.com wrote: The SR620's manual is perfect, there is a whole chapter has detail information of performance test. You can use that way for check the counter's condition. Hui Zhang At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 5342A (18 GHz) vs 5352B (40 GHz) frequency counters
The manual stated HP5342A have a option 001, it's a HP10544 OCXO with PC card connector(A24), but when I opened my HP5342A, there is very limited space, I doubt it's whether can contain a big 10544 OCXO in there. So I always use a external 10MHz to feed my counter. Hui Zhang At 2014-11-22 05:51:16, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: I am looking for a microwave frequency counter and won an auction for an 18 GHz 5342A with the GPIB option today @ £200 (GBP). I have just paid for that. I also have the chance to get a 5352B 40 GHz counter for £500. That has GPIB as standard. In the short/medium term I don't see much use for a 40 GHz counter, but I am giving consideration to buying the 40 GHz and selling the 18 GHz one. I would be interested to know if anyone has any opinions on the relative merrits of the two counters. Neither of these counters have ovens, but stability is not a major issue given they take a 10 MHz input. That said, foes anyone know if these take fairly common 10811A ovens? There is a chance I would use it in places where it would not practical to feed in 10 MHz. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi David: I like it. Traded an HP 53132 (user hostile menu system, an the 12 digits per second applies only to frequency, not time) for it. http://www.prc68.com/I/TandFTE.shtml#SR620 Fast precision measurement ( 1ps, 12 digits/sec) hint: http://www.prc68.com/I/FTS4060.shtml#SR620Fast Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html Dr. David Kirkby (Kirkby Microwave Ltd) wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi Bob: I agree with you. But the chapter is a easy way to check your new counter when it arrived, and it's not only a calibration of just self test, it's testing counter's performance on some level. Regards. Hui Zhang At 2014-11-22 10:22:53, Bob Camp kb...@n1k.org wrote: Hi Probably the best information out there on setting up a SR620 is buried in the archives of this list back a few years. The back and forth required on some of the adjustments is far from obvious. You do need to start from the manual and get it as far as the manual will allow. You then go into the “Time Nuts advanced” procedures. Bob On Nov 21, 2014, at 9:19 PM, Hui Zhang ba...@163.com wrote: The SR620's manual is perfect, there is a whole chapter has detail information of performance test. You can use that way for check the counter's condition. Hui Zhang At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi If I follow your hint: I set the 620 up for a 1 second gate and then I ask for an average of 1,000 readings. This takes 1,000 seconds? Bob On Nov 21, 2014, at 9:32 PM, Brooke Clarke bro...@pacific.net wrote: Hi David: I like it. Traded an HP 53132 (user hostile menu system, an the 12 digits per second applies only to frequency, not time) for it. http://www.prc68.com/I/TandFTE.shtml#SR620 Fast precision measurement ( 1ps, 12 digits/sec) hint: http://www.prc68.com/I/FTS4060.shtml#SR620Fast Mail_Attachment -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html http://www.prc68.com/I/DietNutrition.html Dr. David Kirkby (Kirkby Microwave Ltd) wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SR620 - any gotchas buying a used one?
Hi From what I’ve seen, many 620’s that have been sitting for a few years will not operate until the calibration procedure is run. They drift far enough out that they pitch errors trying to do simple things. Let the beast warm up for an hour and run the cal as soon as you get a used one. Bob On Nov 21, 2014, at 9:34 PM, Hui Zhang ba...@163.com wrote: Hi Bob: I agree with you. But the chapter is a easy way to check your new counter when it arrived, and it's not only a calibration of just self test, it's testing counter's performance on some level. Regards. Hui Zhang At 2014-11-22 10:22:53, Bob Camp kb...@n1k.org wrote: Hi Probably the best information out there on setting up a SR620 is buried in the archives of this list back a few years. The back and forth required on some of the adjustments is far from obvious. You do need to start from the manual and get it as far as the manual will allow. You then go into the “Time Nuts advanced” procedures. Bob On Nov 21, 2014, at 9:19 PM, Hui Zhang ba...@163.com wrote: The SR620's manual is perfect, there is a whole chapter has detail information of performance test. You can use that way for check the counter's condition. Hui Zhang At 2014-11-22 07:51:41, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: After regrettably selling my 5370B a few years ago, I decided to look for a used SR620. Are there any particular issues with these that could be tested by the seller prior to shipping it? I have not downloaded the manual yet, but I assume there's a basic test in there - probably similar to that in the 5370B manual. Were these available with a Rb oscillator? I see a seller on eBay that he has some Rb ones for $1500 extra, but I don't see it as an option on the SRS web site. Dr David Kirkby Managing Director Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 07910 441670 / +44 7910 441670 (0900-2100 GMT) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Time tagging fpga
I finally got the time tagging fpga I was playing with to a semi-usable state. I mentioned in an earlier post that I was unable to compile or link the FTDI library but Magnus Karlsson very kindly rewrote a program of his to provide me with a utility to set up the USB asynchronous parallel interface characteristics on the PC. Only bad thing is you're running blind so it pays to do a short run to make sure all's well before committing to a long capture. I just finished a trial run using the Riley DMTD with three devices. I have a rather shaky 5065A, an Austron 1250 and an FTS 1050. The attached trace shows the 5065 misbehaving about half way through the run, the FTS displaying a periodic oscillation and the Austron just doing it's thing. It's nothing earth shattering but it sure is nice having the third clock to sort out who's being naughty or nice. I kinda suspect the FTS oscillation is related to the battery charging cycle; back in 2013 TVB mentioned he'd had problems with the FTS battery charging affecting the outputs. Anything specific to look at aside from replacing all the usual capacitor suspects? Regards, Bob Darby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
