Re: [time-nuts] altinex switches
Hi Chuck, some early 75R BNC designs did use a smaller diameter center contact. The 75R male can make intermittent contact when used with a worn or top of limit 50R female. The 75R female can be damaged for use with the small contact male if used with a 50R or large contact 75R male. The do exist, but are pretty rare. A lot got changed out as faulty. I've not seen one on any modern (last 20 years) equipment. Robert G8RPI. From: Chuck Harris To: Discussion of precise time and frequency measurement Sent: Friday, 22 February 2013, 6:15 Subject: Re: [time-nuts] altinex switches In general, no, they are not. The connector pins for modern 75ohm BNC's are exactly the same part as for modern 50 ohm BNC's. The BNC gets the higher impedance inside of the connection area by removing most of the inner dielectric. The real problem child, in general, is the female 75 ohm N connector, vs the male 50 ohm N connector. In this case, the connector has no dielectric in the mating area, so in order to keep the impedance constant, it has to have a smaller diameter center conductor on the 75 ohm variant. If you attempt to mate a 50 ohm male N connector with a 75 ohm female N connector, you will split out the female center socket pin. Legend has it that there were some variations of the 75 ohm BNC that don't work with 50 ohm variety I can't speak to whether or not that is true, only that in my 40 years in the business, I have never seen one where there was a problem. -Chuck Harris paul swed wrote: > Good point Bob the 75 ohms are smaller in diameter. I use 75 ohm connectors. > The 50 into a 75 hole spreads the jack. > Regards > Paul > WB8TSL > > On Thu, Feb 21, 2013 at 4:16 PM, Bob Camp wrote: > >> Hi >> >> Be careful with the BNC connectors on those switches. 75 ohm BNC's aren't >> the same as 50 ohm connectors. The inner contact is different enough that >> they don't always play well together. >> >> 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. ___ 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] Hello and new Project
Use the buttons on the front panel to drill down into the setup menu and find the dhcp setting. Have fun On Thu, Feb 21, 2013 at 10:05 PM, Martin A Flynn wrote: > Hi folks, > I picked up a used TS-2100L for use at a local technology museum. Unit > powers up, locks, and syncs. (all three front panel LED are green) > > Using wire shark I can see traffic to the device on 192.168.56.99, however I > can't connect to the management page. > > Any suggestions on how to proceed? > > Martin Flynn > ___ > 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] altinex switches
In general, no, they are not. The connector pins for modern 75ohm BNC's are exactly the same part as for modern 50 ohm BNC's. The BNC gets the higher impedance inside of the connection area by removing most of the inner dielectric. The real problem child, in general, is the female 75 ohm N connector, vs the male 50 ohm N connector. In this case, the connector has no dielectric in the mating area, so in order to keep the impedance constant, it has to have a smaller diameter center conductor on the 75 ohm variant. If you attempt to mate a 50 ohm male N connector with a 75 ohm female N connector, you will split out the female center socket pin. Legend has it that there were some variations of the 75 ohm BNC that don't work with 50 ohm variety I can't speak to whether or not that is true, only that in my 40 years in the business, I have never seen one where there was a problem. -Chuck Harris paul swed wrote: Good point Bob the 75 ohms are smaller in diameter. I use 75 ohm connectors. The 50 into a 75 hole spreads the jack. Regards Paul WB8TSL On Thu, Feb 21, 2013 at 4:16 PM, Bob Camp wrote: Hi Be careful with the BNC connectors on those switches. 75 ohm BNC's aren't the same as 50 ohm connectors. The inner contact is different enough that they don't always play well together. 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] Hello and new Project
On 2/21/2013 10:05 PM, Martin A Flynn wrote: Hi folks, I picked up a used TS-2100L for use at a local technology museum. Unit powers up, locks, and syncs. (all three front panel LED are green) Using wire shark I can see traffic to the device on 192.168.56.99, however I can't connect to the management page. Any suggestions on how to proceed? Obvious questions - Can you ping it? Did you configure your PC to be on the same subnet (192.168.56.0/24)? Have you tried connecting to the serial console? ___ 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] altinex switches
Hi Jim: I had to make up a little 3-pin to 9-pin adapter using loose pins. It just kinda hangs there... Don James Tucker > Don; > I got one of those switchs;*very* nice product, great price. Wish I'd > bought two! > Do you have a reference for the mating connector for the RS232 by any > chance? > > JimT > > Sent from *my* galaxy (Nexus). > On Feb 21, 2013 4:13 PM, "Don Latham" wrote: > >> I don't have the manual source offhand, but it will be in my msg >> archived. The RS232 does respond, and can also be used to control the >> unit I have. I got a nice note from the seller; apparently the >> time-nuts >> snatched these units up in less than a day...and it was the seller who >> put me on to the manual, a typical Google got me nothing. I'll be home >> next week, and can supply the manual URL then if you can't find it. >> Don >> >> Robert LaJeunesse >> > I've been known to just stack a 150 Ohm 1% chip resistor on top of a >> 75 >> > Ohm chip >> > resistor to bring the result down to 50 Ohms. Beats having to 1) >> remove >> > the old >> > part, 2) clean up the pads, then 3) get the new one soldered down. >> > >> > Bob L. >> > >> > >> > >> > >> > From: Arthur Dent >> > To: "time-nuts@febo.com" >> > Sent: Thu, February 21, 2013 4:13:48 PM >> > Subject: [time-nuts] altinex switches >> > >> > ... it should be easy to switch it to 50 ohms although it may not >> make >> > any real >> > difference. >> > ___ >> > 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. >> > ___ > 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.
[time-nuts] Hello and new Project
Hi folks, I picked up a used TS-2100L for use at a local technology museum. Unit powers up, locks, and syncs. (all three front panel LED are green) Using wire shark I can see traffic to the device on 192.168.56.99, however I can't connect to the management page. Any suggestions on how to proceed? Martin Flynn ___ 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] altinex switches
Don; I got one of those switchs;*very* nice product, great price. Wish I'd bought two! Do you have a reference for the mating connector for the RS232 by any chance? JimT Sent from *my* galaxy (Nexus). On Feb 21, 2013 4:13 PM, "Don Latham" wrote: > I don't have the manual source offhand, but it will be in my msg > archived. The RS232 does respond, and can also be used to control the > unit I have. I got a nice note from the seller; apparently the time-nuts > snatched these units up in less than a day...and it was the seller who > put me on to the manual, a typical Google got me nothing. I'll be home > next week, and can supply the manual URL then if you can't find it. > Don > > Robert LaJeunesse > > I've been known to just stack a 150 Ohm 1% chip resistor on top of a 75 > > Ohm chip > > resistor to bring the result down to 50 Ohms. Beats having to 1) remove > > the old > > part, 2) clean up the pads, then 3) get the new one soldered down. > > > > Bob L. > > > > > > > > > > From: Arthur Dent > > To: "time-nuts@febo.com" > > Sent: Thu, February 21, 2013 4:13:48 PM > > Subject: [time-nuts] altinex switches > > > > ... it should be easy to switch it to 50 ohms although it may not make > > any real > > difference. > > ___ > > 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. > ___ 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] altinex switches
Update: The manual is at: http://pdf.textfiles.com/manuals/STARINMANUALS/Altinex/Manual/Archive/Home%20Run%20(HR)%20Series.pdf Just verified, and it's still there. Don Don Latham > I don't have the manual source offhand, but it will be in my msg > archived. The RS232 does respond, and can also be used to control the > unit I have. I got a nice note from the seller; apparently the time-nuts > snatched these units up in less than a day...and it was the seller who > put me on to the manual, a typical Google got me nothing. I'll be home > next week, and can supply the manual URL then if you can't find it. > Don > > Robert LaJeunesse >> I've been known to just stack a 150 Ohm 1% chip resistor on top of a >> 75 >> Ohm chip >> resistor to bring the result down to 50 Ohms. Beats having to 1) >> remove >> the old >> part, 2) clean up the pads, then 3) get the new one soldered down. >> >> Bob L. >> >> >> >> >> From: Arthur Dent >> To: "time-nuts@febo.com" >> Sent: Thu, February 21, 2013 4:13:48 PM >> Subject: [time-nuts] altinex switches >> >> ... it should be easy to switch it to 50 ohms although it may not make >> any real >> difference. >> ___ >> 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. > -- "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] altinex switches
I don't have the manual source offhand, but it will be in my msg archived. The RS232 does respond, and can also be used to control the unit I have. I got a nice note from the seller; apparently the time-nuts snatched these units up in less than a day...and it was the seller who put me on to the manual, a typical Google got me nothing. I'll be home next week, and can supply the manual URL then if you can't find it. Don Robert LaJeunesse > I've been known to just stack a 150 Ohm 1% chip resistor on top of a 75 > Ohm chip > resistor to bring the result down to 50 Ohms. Beats having to 1) remove > the old > part, 2) clean up the pads, then 3) get the new one soldered down. > > Bob L. > > > > > From: Arthur Dent > To: "time-nuts@febo.com" > Sent: Thu, February 21, 2013 4:13:48 PM > Subject: [time-nuts] altinex switches > > ... it should be easy to switch it to 50 ohms although it may not make > any real > difference. > ___ > 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] altinex switches
Good point Bob the 75 ohms are smaller in diameter. I use 75 ohm connectors. The 50 into a 75 hole spreads the jack. Regards Paul WB8TSL On Thu, Feb 21, 2013 at 4:16 PM, Bob Camp wrote: > Hi > > Be careful with the BNC connectors on those switches. 75 ohm BNC's aren't > the same as 50 ohm connectors. The inner contact is different enough that > they don't always play well together. > > Bob > > -Original Message- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Arthur Dent > Sent: Thursday, February 21, 2013 3:57 PM > To: time-nuts@febo.com > Subject: [time-nuts] altinex switches > > > I haven't looked any further but the daughter boards > in the unit have 75 ohm resistors which I'm guessing > determines the input/output impedance of the unit. > If that's the case it should be easy to switch it to 50 > ohms although it may not make any real difference. > > -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. > > > ___ > 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] altinex switches
I've been known to just stack a 150 Ohm 1% chip resistor on top of a 75 Ohm chip resistor to bring the result down to 50 Ohms. Beats having to 1) remove the old part, 2) clean up the pads, then 3) get the new one soldered down. Bob L. From: Arthur Dent To: "time-nuts@febo.com" Sent: Thu, February 21, 2013 4:13:48 PM Subject: [time-nuts] altinex switches ... it should be easy to switch it to 50 ohms although it may not make any real difference. ___ 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] altinex switches
Hi Be careful with the BNC connectors on those switches. 75 ohm BNC's aren't the same as 50 ohm connectors. The inner contact is different enough that they don't always play well together. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Arthur Dent Sent: Thursday, February 21, 2013 3:57 PM To: time-nuts@febo.com Subject: [time-nuts] altinex switches I haven't looked any further but the daughter boards in the unit have 75 ohm resistors which I'm guessing determines the input/output impedance of the unit. If that's the case it should be easy to switch it to 50 ohms although it may not make any real difference. -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. ___ 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] altinex switches
Arthur the video equipment is 75 ohms. This is time-nuttery after all so they do make a difference. Small. But I will never change my 75 ohm resistors out not worth the time and effort by the way I also use 75 ohm cable for Freq distro. But if someone really has nothing better to do then sure change those pesky 1% resistors out. :-) Regards Paul WB8TSL On Thu, Feb 21, 2013 at 3:57 PM, Arthur Dent wrote: > > I haven't looked any further but the daughter boards > in the unit have 75 ohm resistors which I'm guessing > determines the input/output impedance of the unit. > If that's the case it should be easy to switch it to 50 > ohms although it may not make any real difference. > > -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. > ___ 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] altinex switches
I haven't looked any further but the daughter boards in the unit have 75 ohm resistors which I'm guessing determines the input/output impedance of the unit. If that's the case it should be easy to switch it to 50 ohms although it may not make any real difference. -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] altinex switches
I picked up two of these units and they were a very good deal. Don, thanks for finding and reporting them. I wish I had picked up a few more of them. Inside, there is a four output switching supply with +/-12 and +/-5 volts. If it were possible to cut away some of the main board that includes the input modules, there would be enough room to install a GPSDO. This would make for a house standard with up to 16 buffered outputs. Did any of you find any documentation for these units? The control of the device can be done using the two buttons on the rear of the unit. A single input can be selected and a GPSDO 10 MHz fed in to that input. Multiple outputs are selected by first stepping to a channel then pushing in and holding the output button for a few seconds. It is possible to have a single input drive all the outputs with no loss. Regards, Tom - Original Message - From: "Don Latham" To: "time nuts" Sent: Monday, February 11, 2013 8:59 PM Subject: [time-nuts] altinex switches I bought a couple of 180986059633 switches. The manual is at: http://pdf.textfiles.com/manuals/STARINMANUALS/Altinex/Manual/Archive/Home%20Run%20(HR)%20Series.pdf You get 8 inputs switchable to 12 outputs IN ANY COMBO. meaning it can be a 12 output distribution amp. isolation amps all round, and either 200 or 300 MHz bandwidth. dc coupled, have a look. There are some left. Don ___ 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] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE
One of my first programming projects was a RCA 1802 micro replacement for a ware-able Holter monitor. The idea was to record a series of 8 second strips and assign a value of how important they were. This value was used to decide which ones to save for later viewing. The area under the curve and slope were important measurements, both easy to calculate as the area was just a sum of values and slope was a difference between two values. The hard part was separating PVC, PAC from artifacts . Id of the QRS complex was not a issue. The Cross assembly was done on a PDP-15 :-) Stanley - Original Message - From: "Magnus Danielson" To: Sent: Wednesday, February 20, 2013 4:49 PM Subject: Re: [time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE On 20/02/13 02:23, Bob Camp wrote: Hi The first layer to the onion is that the ECG signal is a bit complex. There's also likely to be a bit of this and that on it. How about taking the output of the instrument amp into the A/D port on a cheap PIC? That would let you do some AGC and dynamic filtering. At even a modest sample rate (say 10 KHz) the heart rate could be worked out in software. I think I'd run a PWM out and drive an analog meter with it. Exactly which platform you choose isn't as important, but I was thinking essentially the same. Frequency measurement using time between suitable trigger-point on the waveform would allow simple conversion into BPM scaled frequency. A suitable exponential lag filter can then average the values, and allow for a few suitable smoothing filter bandwidths. AGC and trigger detector, possibly some pre-filtering, should be the main things to look at, the remaining is relatively trivial. There are Agilent function generators (33120A or 33250A if I recall correctly) with heart-wave shapes which would be good to use for testing. The nice thing about keeping it simple is being able to run it off a 9 volt battery. That takes care of a *lot* of issues. Oh yes. Unless the monitoring system being tapped isn't handling most of the isolation/loop issues. Cheers, Magnus ___ 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.
