[time-nuts] New PIC frequency dividers
Over the past year many people have asked for special features in those cute little 8-pin PDIP PIC divider chips that I play with and use in my lab. I've updated the web page: http://leapsecond.com/pic/picdiv.htm There are now close to 20 different versions. Here's a partial list: PD03 -- 4-pin 10^3 frequency divider (10 MHz to 10 kHz) PD04 -- 4-pin 10^4 frequency divider (10 MHz to 1 kHz) PD05 -- 4-pin 10^5 frequency divider (10 MHz to 100 Hz) PD06 -- 4-pin 10^6 frequency divider (10 MHz to 10 Hz) PD07 -- 4-pin 10^7 frequency divider (10 MHz to 1 Hz) PD08 -- 4-pin 5x10^6 frequency divider (5 MHz to 1 Hz) PD09 -- 4-pin 10 MHz to 1PPS frequency divider (20 us pulse) PD10 -- 4-pin 10 MHz to 1PPS frequency divider (10 ms pulse) PD11 -- 10 MHz to 1PPS frequency divider (3 pulse widths), with sync PD12 -- 5 MHz to 1PPS frequency divider (3 pulse widths), with sync PD13 -- 10 MHz to three frequencies divider (1-10-100 Hz), with sync PD14 -- 5 MHz to three frequencies divider (1-10-100 Hz), with sync PD15 -- 10 MHz to three frequencies divider (1-1k-10k Hz), with sync PD16 -- 5/10 MHz to four frequencies divider (1-10-100-1000 Hz) PD17 -- 1/2.5/5/10 MHz to 1PPS frequency divider (100 ms), with sync PD18 -- 1/2.5/5/10 MHz to 1PPS frequency divider (10 ms), with sync PD26 -- 10 MHz to 1PPS frequency divider, with sync and microstep Note these are all compatible with the TAPR T2-mini board (which comes with a PD17). /tvb http://leapsecond.com/pic/ ___ 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] HP53132A vs SR625
Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] Nifty MINI TIC for DMTD
Dear Bert, Thank you for the update! And a peek into the kitchen ;-) I guess the SMD board you mention is assembled. But I think there are people who are interested in bare boards as well Good luck and best regards, Jeroen On 02/06/2013 05:01 PM, ewkeh...@aol.com wrote: The delay is mainly do to the fact that the promise to do the drawings did not materialize. The counters are done and tests on variations of the D/M's are ongoing since the noise floor is not the counter but the D/M. Bill Riley's boards are out there and it would be nice to get some feedback on test results, also I have explored the possibility of some one manufacturing the board. A time nut is in the business and will be able to supply the SMD version of the board for $160 plus shipping if a minimum volume of 20 get ordered. As to D/M four options will be available starting with Bill's PCB. I have 4 kits of my D/M and counters available and will work with some that have the proper OCXO's and willingness to test with Time Lab since tests with Stable 32 and Ulrich's A/V software is ongoing. If interested please contact me off list Recent tests by Corby has convinced me that with the four channel counter not only cross correlation but also three corner hat is doable with one dual mixer. The offset oscillator has to be also of high quality. Some of the delays are due to visitors over the holidays but also the fact that the D/M project is not the only one. Of equal or more importance is a home standard that can get close to a Maser using GPS Rb and the best OCXO in the house.On the D/M the only work for us is packaging and display PIC programming. Latest set of boards were ordered yesterday. The display is a nice feature but not necessary. I hope we will have the drawings in about 10 days. Bert Kehren In a message dated 2/6/2013 4:15:33 A.M. Eastern Standard Time, j.bastemei...@tudelft.nl writes: Dear all, ! Did I miss something, or are we all waiting for more info to be published on this system? I checked KO4BB site, but I couldn't find any new info on this project. An update would be appreciated! Note: This message is written with a positive intent, not as a complaint! Thank you, best regards, Jeroen ___ 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] HP53132A vs SR625
Hi The SR625 is a SR620 with a rubidium time base. If the Rb is in good shape, and you don't have a house standard, then that's a significant plus. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hui Zhang Sent: Thursday, February 07, 2013 9:43 AM To: time-nuts@febo.com Subject: [time-nuts] HP53132A vs SR625 Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] Nifty MINI TIC for DMTD
You can buy today the Bill Riley board and there are few boards of a change with larger SMD also today available. Once we release a final S M D version any one that wants to buy only a board that ia an option, the same will also be available in through hole. Bert Sent from Samsung tabletJeroen Bastemeijer j.bastemei...@tudelft.nl wrote:Dear Bert, Thank you for the update! And a peek into the kitchen ;-) I guess the SMD board you mention is assembled. But I think there are people who are interested in bare boards as well Good luck and best regards, Jeroen On 02/06/2013 05:01 PM, ewkeh...@aol.com wrote: The delay is mainly do to the fact that the promise to do the drawings did not materialize. The counters are done and tests on variations of the D/M's are ongoing since the noise floor is not the counter but the D/M. Bill Riley's boards are out there and it would be nice to get some feedback on test results, also I have explored the possibility of some one manufacturing the board. A time nut is in the business and will be able to supply the SMD version of the board for $160 plus shipping if a minimum volume of 20 get ordered. As to D/M four options will be available starting with Bill's PCB. I have 4 kits of my D/M and counters available and will work with some that have the proper OCXO's and willingness to test with Time Lab since tests with Stable 32 and Ulrich's A/V software is ongoing. If interested please contact me off list Recent tests by Corby has convinced me that with the four channel counter not only cross correlation but also three corner hat is doable with one dual mixer. The offset oscillator has to be also of high quality. Some of the delays are due to visitors over the holidays but also the fact that the D/M project is not the only one. Of equal or more importance is a home standard that can get close to a Maser using GPS Rb and the best OCXO in the house.On the D/M the only work for us is packaging and display PIC programming. Latest set of boards were ordered yesterday. The display is a nice feature but not necessary. I hope we will have the drawings in about 10 days. Bert Kehren In a message dated 2/6/2013 4:15:33 A.M. Eastern Standard Time, j.bastemei...@tudelft.nl writes: Dear all, ! Did I miss something, or are we all waiting for more info to be published on this system? I checked KO4BB site, but I couldn't find any new info on this project. An update would be appreciated! Note: This message is written with a positive intent, not as a complaint! Thank you, best regards, Jeroen ___ 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] HP53132A vs SR625
The SR625 at the same price of the HP53132A: either the HP is overvalued or the SR625 is a real bargain... On Thu, Feb 7, 2013 at 5:36 PM, Bob Camp li...@rtty.us wrote: Hi The SR625 is a SR620 with a rubidium time base. If the Rb is in good shape, and you don't have a house standard, then that's a significant plus. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hui Zhang Sent: Thursday, February 07, 2013 9:43 AM To: time-nuts@febo.com Subject: [time-nuts] HP53132A vs SR625 Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] HP53132A vs SR625
If the SR is in good shape I would prefer the SR. I love my one not only for it's technical data but also for the way of operation. Less menues, more controls, logically arranged. Volker Am 07.02.2013 17:53, schrieb Azelio Boriani: The SR625 at the same price of the HP53132A: either the HP is overvalued or the SR625 is a real bargain... On Thu, Feb 7, 2013 at 5:36 PM, Bob Campli...@rtty.us wrote: Hi The SR625 is a SR620 with a rubidium time base. If the Rb is in good shape, and you don't have a house standard, then that's a significant plus. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hui Zhang Sent: Thursday, February 07, 2013 9:43 AM To: time-nuts@febo.com Subject: [time-nuts] HP53132A vs SR625 Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] HP53132A vs SR625
Hui Well given what you have shared for information neither answer is right or wrong better or worse. The question that we would need answered to be helpful is how will you use it. What price are you willing to pay. There are tradeoffs. I am not an expert. I have many HP counters that I like well. I have SRS equipment thats equally very fine. I do not have a SRS 620 or 625. But if I ever see one at a really good price. (Really cheap) I would buy it, even if broken. Regards Paul On Thu, Feb 7, 2013 at 1:43 PM, Volker Esper ail...@t-online.de wrote: If the SR is in good shape I would prefer the SR. I love my one not only for it's technical data but also for the way of operation. Less menues, more controls, logically arranged. Volker Am 07.02.2013 17:53, schrieb Azelio Boriani: The SR625 at the same price of the HP53132A: either the HP is overvalued or the SR625 is a real bargain... On Thu, Feb 7, 2013 at 5:36 PM, Bob Campli...@rtty.us wrote: Hi The SR625 is a SR620 with a rubidium time base. If the Rb is in good shape, and you don't have a house standard, then that's a significant plus. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**febo.comtime-nuts-boun...@febo.com] On Behalf Of Hui Zhang Sent: Thursday, February 07, 2013 9:43 AM To: time-nuts@febo.com Subject: [time-nuts] HP53132A vs SR625 Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/**mailman/listinfo/time-nutshttps://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-nutshttps://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-nutshttps://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-nutshttps://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] HP53132A vs SR625
Hi Hui: The HP 53132A is called a Universal Frequency Counter can count frequency at 12 digits per second, but that is not the case when it is measuring time intervals. The human interface might be called user hostile. The front panel of the SR 620 is marked Universal Time Interval Counter and is great for making time interval measurements. That's why I traded my 53132 for the SR620. http://www.prc68.com/I/TandFTE.shtml#SR620 If you're doing Time Nuts measurements you probably have a good 10 MHz oscillator that you can feed into either of these counters so getting an optional time base in one of them serves little purpose. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Hui Zhang wrote: Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] HP53132A vs SR625
On 02/07/2013 07:43 PM, Volker Esper wrote: If the SR is in good shape I would prefer the SR. I love my one not only for it's technical data but also for the way of operation. Less menues, more controls, logically arranged. I tend to agree here. The HP/Agilent 53132A lacks the ease of use aspect that older HP counters had. It has better performance than many of the older, but not all. The SR620/625 has (if in good condition) better performance than the 53132A. These days I have both. Cheers, Magnus Volker Am 07.02.2013 17:53, schrieb Azelio Boriani: The SR625 at the same price of the HP53132A: either the HP is overvalued or the SR625 is a real bargain... On Thu, Feb 7, 2013 at 5:36 PM, Bob Campli...@rtty.us wrote: Hi The SR625 is a SR620 with a rubidium time base. If the Rb is in good shape, and you don't have a house standard, then that's a significant plus. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hui Zhang Sent: Thursday, February 07, 2013 9:43 AM To: time-nuts@febo.com Subject: [time-nuts] HP53132A vs SR625 Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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.
Re: [time-nuts] Nifty MINI TIC for DMTD
through hole forever :-) Don of the old hands and blurred vision :-) ewkehren You can buy today the Bill Riley board and there are few boards of a change with larger SMD also today available. Once we release a final S M D version any one that wants to buy only a board that ia an option, the same will also be available in through hole. Bert Sent from Samsung tabletJeroen Bastemeijer j.bastemei...@tudelft.nl wrote:Dear Bert, Thank you for the update! And a peek into the kitchen ;-) I guess the SMD board you mention is assembled. But I think there are people who are interested in bare boards as well Good luck and best regards, Jeroen On 02/06/2013 05:01 PM, ewkeh...@aol.com wrote: The delay is mainly do to the fact that the promise to do the drawings did not materialize. The counters are done and tests on variations of the D/M's are ongoing since the noise floor is not the counter but the D/M. Bill Riley's boards are out there and it would be nice to get some feedback   on test results, also I have explored the possibility of some one manufacturing the board. A time nut is in the business and will be able to supply the SMD version of the board for $160 plus shipping if a minimum volume of 20 get ordered. As to D/M four options will be available starting with Bill's PCB. I have 4 kits of my D/M and counters available and will work with some that   have the proper OCXO's and willingness to test with Time Lab since tests with Stable 32 and Ulrich's A/V software is ongoing. If interested please contact me off list Recent tests by Corby has convinced me that with the four channel counter not only cross correlation but also three corner hat is doable with one dual mixer. The offset oscillator has to be also of high quality. Some of the delays are due to visitors over the holidays but also the fact that the D/M project is not the only one. Of equal or more importance is a   home standard that can get close to a Maser using GPS Rb and the best OCXO   in the house.On the D/M the only work for us is packaging and display PIC programming. Latest set of boards were ordered yesterday. The display is a nice feature but not necessary. I hope we will have the drawings in about 10 days. Bert Kehren     In a message dated 2/6/2013 4:15:33 A.M. Eastern Standard Time, j.bastemei...@tudelft.nl writes: Dear all, ! Did I miss something, or are we all waiting for more info to be published on this system? I checked KO4BB site, but I couldn't find any new info on this project. An update would be appreciated! Note: This message is written with a positive intent, not as a complaint! Thank you, best regards, Jeroen ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 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] HP53132A vs SR625
Hello Dear Group: I am very glad to see so many replies in the morning, and I am very grateful to every time nuts gave me useful information, your proposal has strengthened my determination, in fact, I am also very like SR625, So I will to find and buy a good shape SR625 for my new time interval measure instrument. Thanks again for everyone's advice, which is very useful to make a choice for me. Sorry for not reply everyone's mail. Best Regards! Hui Zhang At 2013-02-08 05:12:37,Brooke Clarke bro...@pacific.net wrote: Hi Hui: The HP 53132A is called a Universal Frequency Counter can count frequency at 12 digits per second, but that is not the case when it is measuring time intervals. The human interface might be called user hostile. The front panel of the SR 620 is marked Universal Time Interval Counter and is great for making time interval measurements. That's why I traded my 53132 for the SR620. http://www.prc68.com/I/TandFTE.shtml#SR620 If you're doing Time Nuts measurements you probably have a good 10 MHz oscillator that you can feed into either of these counters so getting an optional time base in one of them serves little purpose. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Hui Zhang wrote: Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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] Nifty MINI TIC for DMTD
On Thu, Feb 7, 2013 at 4:02 PM, Don Latham d...@montana.com wrote: through hole forever :-) Don of the old hands and blurred vision :-) ewkehren I grew out of thru-hole about 10 years ago. My nearly 40 year old eyes have trouble reading the numbers on 0603 parts for the past few years, but it's amazingly easy under a stereo microscope. Much faster to stuff boards with surface mount parts since I don't need to keep flipping them over and cutting leads. Even folks with very shaky hands can solder up tiny surface mount parts. The brain is an amazing PID controller. Using a microscope at 30x means your hands shake at about 1/30th of what they did before. -Bob ___ 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] HP53132A vs SR625
Hui, rent one of each if you can before you make your choice. I have both, and the HP unit is much easier to use once you know which button sequence to push to get more than just Frequency/Time-Interval type measurements - these can be single-button events on the HP unit. Even offsetting and normalizing frequencies becomes very easy after a couple of days of using the unit, there is no setting that takes me longer than about 5 seconds to set up, so while not perfect, the user interface can be learned easily. I find the SR620 to have too many buttons(!) I always find myself searching for just that one button. Anyways, more buttons are just more things that can fail. If you are a pilot, and have used a Garmin 430W GPS in your life, then the HP user interface is no challenge whatsoever and seems very easy to use.. The SR-620 has it's advantages, especially when you just do one single type of measurement, but for me it has a huge number of disadvantages, and I mostly use the 53132A for that reason: 1) I paid quite a bit of money and I had it calibrated and fixed by SRS, and it still exhibits a significant frequency offset with a perfect reference and perfect DUT!!! SRS says a small frequency error is normal, well that prevents me from using the unit as a frequency counter, for me it's only useful as a relative display frequency counter. HP doesn't have such a frequency error, so no worries there. 2) The SRS unit is s loud that it's totally annoying and unacceptable for long measurements. Many folks reported this here before. It's just bad. Whining like crazy. 3) The SRS unit is 19 wide, huge, heavy, and clunky. I need my counter portable, only the HP unit will do 4) The SRS unit has a much lower MTBF because of all the parts inside, and it needs finicky adjustments, see item 1) above. The HP unit either works, or is just dead. Not much to adjust. Different technology generation. And the coolness factor: a nice florescent tube display is so much more modern looking than those clunky old 7-segment LED's.. 5) The SRS unit is usually $1000 more than the HP unit, and you don't know how good the unit is you are buying because of all of the calibration stuff. Usually there is no hit-or-miss issue with the HP units, they either work, or are dead. That said, the HP unit doesn't measure well at 10MHz, so I mostly use a divide-by-two to get one more digit of resolution out of it, and it's time interval resolution is not as good as the SR620. But for time interval measurements I use a Wavecrest DTS unit that blows the SR620 and the HP out of the water anyways.. Bye, Said In a message dated 2/7/2013 16:39:04 Pacific Standard Time, ba...@163.com writes: Hello Dear Group: I am very glad to see so many replies in the morning, and I am very grateful to every time nuts gave me useful information, your proposal has strengthened my determination, in fact, I am also very like SR625, So I will to find and buy a good shape SR625 for my new time interval measure instrument. Thanks again for everyone's advice, which is very useful to make a choice for me. Sorry for not reply everyone's mail. Best Regards! Hui Zhang ___ 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] HP53132A vs SR625
Hi Normally a 625 is priced above a 620. Rubidium standards have a finite life. You are paying for the Rb when you buy a 625. If the Rb is worn out or nearly at end of life, the 625 is not a good idea. Bob On Feb 7, 2013, at 7:22 PM, Hui Zhang ba...@163.com wrote: Hello Dear Group: I am very glad to see so many replies in the morning, and I am very grateful to every time nuts gave me useful information, your proposal has strengthened my determination, in fact, I am also very like SR625, So I will to find and buy a good shape SR625 for my new time interval measure instrument. Thanks again for everyone's advice, which is very useful to make a choice for me. Sorry for not reply everyone's mail. Best Regards! Hui Zhang At 2013-02-08 05:12:37,Brooke Clarke bro...@pacific.net wrote: Hi Hui: The HP 53132A is called a Universal Frequency Counter can count frequency at 12 digits per second, but that is not the case when it is measuring time intervals. The human interface might be called user hostile. The front panel of the SR 620 is marked Universal Time Interval Counter and is great for making time interval measurements. That's why I traded my 53132 for the SR620. http://www.prc68.com/I/TandFTE.shtml#SR620 If you're doing Time Nuts measurements you probably have a good 10 MHz oscillator that you can feed into either of these counters so getting an optional time base in one of them serves little purpose. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Hui Zhang wrote: Dear Group: I am intend to buy a second-hand counter, I have not decided yet between SR625 and HP53132A, they have very close price in surplus market of here, so, which is better choice? Any suggestion will be appreciated. Best Regards! Hui Zhang ___ 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.
