Re: [time-nuts] Thunderbolt not seeing satellites
Hi The monitor programs should let you know where the DAC voltage is on your unit. If it's 1.9 Hz high and in the center of DAC range, that's fine. Since you have no alarms popping up, I'd guess that the problem has to be pretty close to the GPS front end. The previously mentioned RF amp is a likely suspect. My guess is that once you get into the main part of the receiver, you are in custom chip land. Bob On Jun 10, 2010, at 10:43 PM, Steve wrote: > Hi Bob, > > I took a look at the 10MHz output. The unit had been unpowered on my bench > for an hour or so. It took about 10 minutes to stabilize at 1.9Hz on the high > side of 10MHz as measured on a GPS-referenced counter. Oscilloscope indicates > a level of about +12dBm and a clean looking sine wave. So the OCXO would > appear to be functional. Thanks for the suggestion. > > Anyone know of a source for board layout/schematics/parts list? Might be > interesting to look at, although it is likely beyond my skill set to effect a > repair :-\ > > Steve > > On 6/10/2010 9:59 PM, Bob Camp wrote: >> Hi >> >> I suspect that the unit puts out an ok 10 MHz signal. That would suggest >> that the +12 and likely the +5 supplies are ok. If the monitor software can >> talk to it, that's another indication that the +/-12 and +5 are fairly close >> to working. >> >> I think that a problem with the GPS front end / antenna connection is the >> most likely issue. >> >> Here's another one to consider though: >> >> How far off *is* the 10 MHz output? If the OCXO has gone way off frequency, >> the GPS may not be able to lock. It should be pretty simple to check with a >> counter and the second TBolt. >> >> Bob >> >> >> On Jun 10, 2010, at 8:22 PM, Didier Juges wrote: >> >> >>> The TB has an error flag if there is no antenna connected (open) or if it >>> is shorted. The tboltmon PC software reports these flags, and so does my >>> GPSMon firmware in the fluke.l monitor. >>> >>> It is possible but unlikely that there would be something wrong with the >>> bias circuit that would not be reported by the TB. >>> >>> Didier >>> >>> >>> Sent from my BlackBerry Wireless thingy while I do >>> other things... >>> >>> -Original Message- >>> From: Arthur Dent >>> Date: Thu, 10 Jun 2010 15:49:00 >>> To: >>> Subject: [time-nuts] Thunderbolt not seeing satellites >>> >>> >>> It may or may not tell you what's wrong but a quick check of the >>> Thunderbolt would be to put a tee in series with the antenna and >>> see if the unit is supplying +5 volts under load to the antenna.You >>> have verified that the antenna works with a second unit so you can >>> rule that out. Where you are getting some data from Lady Heather >>> showing it picks up at least 1 satellite I suspect the +5 Vdc power >>> supply that supplies the logic is functioning properly or you'd probably >>> see no data. The +12 Vdc mainly supplies the oscillator so if that's >>> working properly, the +12 is probably ok, It may well be a component >>> in the receiver section on the Thunderbolt board. >>> >>> The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier >>> ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) >>> located on the top side of the board directly behind the antenna connector. >>> The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS >>> connector and they apparently supply the +5 to power the antenna. Those >>> two areas would be likely suspects. >>> >>> >>> >>> ___ >>> 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. >> >> > > -- > Read The Patriot PostVertitas vos Liberabit > http://patriotpost.us/subscription/ > > > ___ > 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] Thunderbolt not seeing satellites
Hi Bob, I took a look at the 10MHz output. The unit had been unpowered on my bench for an hour or so. It took about 10 minutes to stabilize at 1.9Hz on the high side of 10MHz as measured on a GPS-referenced counter. Oscilloscope indicates a level of about +12dBm and a clean looking sine wave. So the OCXO would appear to be functional. Thanks for the suggestion. Anyone know of a source for board layout/schematics/parts list? Might be interesting to look at, although it is likely beyond my skill set to effect a repair :-\ Steve On 6/10/2010 9:59 PM, Bob Camp wrote: Hi I suspect that the unit puts out an ok 10 MHz signal. That would suggest that the +12 and likely the +5 supplies are ok. If the monitor software can talk to it, that's another indication that the +/-12 and +5 are fairly close to working. I think that a problem with the GPS front end / antenna connection is the most likely issue. Here's another one to consider though: How far off *is* the 10 MHz output? If the OCXO has gone way off frequency, the GPS may not be able to lock. It should be pretty simple to check with a counter and the second TBolt. Bob On Jun 10, 2010, at 8:22 PM, Didier Juges wrote: The TB has an error flag if there is no antenna connected (open) or if it is shorted. The tboltmon PC software reports these flags, and so does my GPSMon firmware in the fluke.l monitor. It is possible but unlikely that there would be something wrong with the bias circuit that would not be reported by the TB. Didier Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: Arthur Dent Date: Thu, 10 Jun 2010 15:49:00 To: Subject: [time-nuts] Thunderbolt not seeing satellites It may or may not tell you what's wrong but a quick check of the Thunderbolt would be to put a tee in series with the antenna and see if the unit is supplying +5 volts under load to the antenna.You have verified that the antenna works with a second unit so you can rule that out. Where you are getting some data from Lady Heather showing it picks up at least 1 satellite I suspect the +5 Vdc power supply that supplies the logic is functioning properly or you'd probably see no data. The +12 Vdc mainly supplies the oscillator so if that's working properly, the +12 is probably ok, It may well be a component in the receiver section on the Thunderbolt board. The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) located on the top side of the board directly behind the antenna connector. The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS connector and they apparently supply the +5 to power the antenna. Those two areas would be likely suspects. ___ 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. -- Read The Patriot PostVertitas vos Liberabit http://patriotpost.us/subscription/ ___ 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] Thunderbolt not seeing satellites
Hi I suspect that the unit puts out an ok 10 MHz signal. That would suggest that the +12 and likely the +5 supplies are ok. If the monitor software can talk to it, that's another indication that the +/-12 and +5 are fairly close to working. I think that a problem with the GPS front end / antenna connection is the most likely issue. Here's another one to consider though: How far off *is* the 10 MHz output? If the OCXO has gone way off frequency, the GPS may not be able to lock. It should be pretty simple to check with a counter and the second TBolt. Bob On Jun 10, 2010, at 8:22 PM, Didier Juges wrote: > The TB has an error flag if there is no antenna connected (open) or if it is > shorted. The tboltmon PC software reports these flags, and so does my GPSMon > firmware in the fluke.l monitor. > > It is possible but unlikely that there would be something wrong with the bias > circuit that would not be reported by the TB. > > Didier > > > Sent from my BlackBerry Wireless thingy while I do > other things... > > -Original Message- > From: Arthur Dent > Date: Thu, 10 Jun 2010 15:49:00 > To: > Subject: [time-nuts] Thunderbolt not seeing satellites > > > It may or may not tell you what's wrong but a quick check of the > Thunderbolt would be to put a tee in series with the antenna and > see if the unit is supplying +5 volts under load to the antenna.You > have verified that the antenna works with a second unit so you can > rule that out. Where you are getting some data from Lady Heather > showing it picks up at least 1 satellite I suspect the +5 Vdc power > supply that supplies the logic is functioning properly or you'd probably > see no data. The +12 Vdc mainly supplies the oscillator so if that's > working properly, the +12 is probably ok, It may well be a component > in the receiver section on the Thunderbolt board. > > The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier > ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) > located on the top side of the board directly behind the antenna connector. > The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS > connector and they apparently supply the +5 to power the antenna. Those > two areas would be likely suspects. > > > > ___ > 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] Thunderbolt not seeing satellites
The voltages I measure are 11.8, -12.3 and 4.9VDC. Those measurements are with the unit operating and the power supplies under normal load. There is 4.7VDC on the feed to the antenna, that is with the coax attached to the Thunderbolt. Arthur's suggestion that something is amiss in the RF section seems probable. Thanks for the thoughts and ideas, anything else to consider? Steve On 6/10/2010 8:22 PM, Didier Juges wrote: The TB has an error flag if there is no antenna connected (open) or if it is shorted. The tboltmon PC software reports these flags, and so does my GPSMon firmware in the fluke.l monitor. It is possible but unlikely that there would be something wrong with the bias circuit that would not be reported by the TB. Didier Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: Arthur Dent Date: Thu, 10 Jun 2010 15:49:00 To: Subject: [time-nuts] Thunderbolt not seeing satellites It may or may not tell you what's wrong but a quick check of the Thunderbolt would be to put a tee in series with the antenna and see if the unit is supplying +5 volts under load to the antenna.You have verified that the antenna works with a second unit so you can rule that out. Where you are getting some data from Lady Heather showing it picks up at least 1 satellite I suspect the +5 Vdc power supply that supplies the logic is functioning properly or you'd probably see no data. The +12 Vdc mainly supplies the oscillator so if that's working properly, the +12 is probably ok, It may well be a component in the receiver section on the Thunderbolt board. The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) located on the top side of the board directly behind the antenna connector. The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS connector and they apparently supply the +5 to power the antenna. Those two areas would be likely suspects. ___ 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. -- Read The Patriot PostVertitas vos Liberabit http://patriotpost.us/subscription/ ___ 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] Thunderbolt not seeing satellites
The TB has an error flag if there is no antenna connected (open) or if it is shorted. The tboltmon PC software reports these flags, and so does my GPSMon firmware in the fluke.l monitor. It is possible but unlikely that there would be something wrong with the bias circuit that would not be reported by the TB. Didier Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: Arthur Dent Date: Thu, 10 Jun 2010 15:49:00 To: Subject: [time-nuts] Thunderbolt not seeing satellites It may or may not tell you what's wrong but a quick check of the Thunderbolt would be to put a tee in series with the antenna and see if the unit is supplying +5 volts under load to the antenna.You have verified that the antenna works with a second unit so you can rule that out. Where you are getting some data from Lady Heather showing it picks up at least 1 satellite I suspect the +5 Vdc power supply that supplies the logic is functioning properly or you'd probably see no data. The +12 Vdc mainly supplies the oscillator so if that's working properly, the +12 is probably ok, It may well be a component in the receiver section on the Thunderbolt board. The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) located on the top side of the board directly behind the antenna connector. The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS connector and they apparently supply the +5 to power the antenna. Those two areas would be likely suspects. ___ 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] Thunderbolt not seeing satellites
My understanding is that you have the older red box. Manual for the red box is there: http://www.ko4bb.com/Manuals/05%29_GPS_Timing/Trimble/Trimble_-_Thunderbolt/ ThunderBolt_Datasheet_%28red_box%29.pdf The power spec is 24V nominal, 18V min to 36V max Mine has been running off a small open frame linear 24V supply for several years. If it does not work at 28V, there must be something wrong with it. I do not recommend trying a voltage higher than 36V unless you have a couple Franklins to spare. My opinion is that it would be best to try and troubleshoot the problem first. A power supply problem should not be too hard to identify, knowing that internally, the Thunderbolt runs from +5V and +/- 12V. I do not have the detailed specs on these voltages, but the +12V drives the oven, so it should be stable, even though the nominal value is probably not too critical. The -12V only drives the RS-232, so it is probably not critical at all. The 5V drives a lot of logic and should probably be within 0.25V or better. I suspect the 5V drives the DAC that drives the EFC, but there must be another regulator/reference between the 5V and the DAC reference input. I believe TVB did some voltage sensitivity test at one point on the Group-buy TBs, but off-hand, I do not remember. Didier -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: Thursday, June 10, 2010 5:33 PM To: time-nuts@febo.com Subject: [time-nuts] Thunderbolt not seeing satellites I'm not sure of the required power spec, but 28V may be too low. These were meant to run off a telco power bus (nominal 48V). I run mine at 40V (from a Tek PS503A mounted in a TM501 mainframe, unit connected across the + and - supply terminals, outputs set to +/- 20V). It won't run at 28V. Input voltage to the poor performing unit is about 28VDC. _ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:W L:en-US:WM_HMP:042010_3 ___ 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] Thunderbolt not seeing satellites
In a message dated 10/06/2010 20:14:40 GMT Daylight Time, stev...@suddenlink.net writes: Input voltage to the poor performing unit is about 28VDC. I did the tboltmon.exe Factory Reset with no discernible difference in performance. It is the Thunderbolt model in the aluminum housing with the red and black Trimble Thunderbolt label on top. Presumably this is the version that contains a switch mode PSU to generate the 5, 12, and -12 volts needed by the T'bolt. Have you checked the outputs of that PSU? regards Nigel GM8PZR ___ 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] Thunderbolt not seeing satellites
It may or may not tell you what's wrong but a quick check of the Thunderbolt would be to put a tee in series with the antenna and see if the unit is supplying +5 volts under load to the antenna.You have verified that the antenna works with a second unit so you can rule that out. Where you are getting some data from Lady Heather showing it picks up at least 1 satellite I suspect the +5 Vdc power supply that supplies the logic is functioning properly or you'd probably see no data. The +12 Vdc mainly supplies the oscillator so if that's working properly, the +12 is probably ok, It may well be a component in the receiver section on the Thunderbolt board. The Thunderbolt receiver board I looked at had a Macom AM50002 amplifier ( http://cs.utsource.net/goods_files/pdf/71/71500_MACOM_AM52.pdf ) located on the top side of the board directly behind the antenna connector. The bottom side of the board has D1, Q1, and R1 directly behind the 1PPS connector and they apparently supply the +5 to power the antenna. Those two areas would be likely suspects. ___ 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] Thunderbolt not seeing satellites
Hi I would certainly check the solder connections to the RF and power connectors on the PC board. Some of them apparently didn't get a real good solder job when they were new. Bob On Jun 10, 2010, at 3:09 PM, Steve wrote: > Hi all, > > I have used a Trimble Thunderbolt for several years as a source for accurate > 10MHz signals for counters and signal generators. I have occasionally looked > at the Thunderbolt with a laptop and Lady Heather, but have largely treated > the Thunderbolt as a plug-and-play-and-forget-about-it device. > > Several weeks ago I acquired one of the fluke.l monitors and attached it to > the Thunderbolt, placing the fluke.l in a location such that I see it every > time I walk into my shop. To my dismay, after watching the fluke.l for a > while, I discovered that my Thunderbolt rarely sees satellites. I then began > more intense monitoring with Lady Heather, finding that the Thunderbolt will > on rare occasions show one satellite as usable, most of the time none. > > Another Thunderbolt, purchased in May, 2008, when they were sold on this > list, routinely see 4-8 satellites when connected to the same antenna. > > Input voltage to the poor performing unit is about 28VDC. I did the > tboltmon.exe Factory Reset with no discernible difference in performance. It > is the Thunderbolt model in the aluminum housing with the red and black > Trimble Thunderbolt label on top. > > Any thoughts as to what's wrong with it? > > Steve > > -- > Read The Patriot PostVertitas vos Liberabit > http://patriotpost.us/subscription/ > > > ___ > 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] Thunderbolt not seeing satellites
Hi all, I have used a Trimble Thunderbolt for several years as a source for accurate 10MHz signals for counters and signal generators. I have occasionally looked at the Thunderbolt with a laptop and Lady Heather, but have largely treated the Thunderbolt as a plug-and-play-and-forget-about-it device. Several weeks ago I acquired one of the fluke.l monitors and attached it to the Thunderbolt, placing the fluke.l in a location such that I see it every time I walk into my shop. To my dismay, after watching the fluke.l for a while, I discovered that my Thunderbolt rarely sees satellites. I then began more intense monitoring with Lady Heather, finding that the Thunderbolt will on rare occasions show one satellite as usable, most of the time none. Another Thunderbolt, purchased in May, 2008, when they were sold on this list, routinely see 4-8 satellites when connected to the same antenna. Input voltage to the poor performing unit is about 28VDC. I did the tboltmon.exe Factory Reset with no discernible difference in performance. It is the Thunderbolt model in the aluminum housing with the red and black Trimble Thunderbolt label on top. Any thoughts as to what's wrong with it? Steve -- Read The Patriot PostVertitas vos Liberabit http://patriotpost.us/subscription/ ___ 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] Thunderbolt not seeing satellites
Hi Steve, I don't know what the issue is, but my experience was very similar. My Tbolt is the same (or very similar) to yours and worked fine for a few years off and on. When Lady Heather became available, I took it out again. It worked great with the antenna indoors in my lab for about 4 hours, then data displayed by LH gradually dropped off to what you would see if the unit wasn't working. Since then I've tried again many times with the antenna in various locations, including full sky view with no results. No alarms except for the ones you would see in a normal start situation. Did the factory reset, etc. It has never seen a sat since. The antenna and cable are good. My primary receiver is a Z3801A, so I've had little incentive to delve into this problem (too many other pressing projects). -Dave - Original Message - From: "Steve" To: "Discussion of precise time and frequency measurement" Sent: Thursday, June 10, 2010 12:09:11 PM GMT -08:00 US/Canada Pacific Subject: [time-nuts] Thunderbolt not seeing satellites Hi all, I have used a Trimble Thunderbolt for several years as a source for accurate 10MHz signals for counters and signal generators. I have occasionally looked at the Thunderbolt with a laptop and Lady Heather, but have largely treated the Thunderbolt as a plug-and-play-and-forget-about-it device. Several weeks ago I acquired one of the fluke.l monitors and attached it to the Thunderbolt, placing the fluke.l in a location such that I see it every time I walk into my shop. To my dismay, after watching the fluke.l for a while, I discovered that my Thunderbolt rarely sees satellites. I then began more intense monitoring with Lady Heather, finding that the Thunderbolt will on rare occasions show one satellite as usable, most of the time none. Another Thunderbolt, purchased in May, 2008, when they were sold on this list, routinely see 4-8 satellites when connected to the same antenna. Input voltage to the poor performing unit is about 28VDC. I did the tboltmon.exe Factory Reset with no discernible difference in performance. It is the Thunderbolt model in the aluminum housing with the red and black Trimble Thunderbolt label on top. Any thoughts as to what's wrong with it? Steve -- Read The Patriot Post Vertitas vos Liberabit http://patriotpost.us/subscription/ ___ 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] Thunderbolt not seeing satellites
In a message dated 10/06/2010 23:34:05 GMT Daylight Time, hol...@hotmail.com writes: I'm not sure of the required power spec, but 28V may be too low. These were meant to run off a telco power bus (nominal 48V). I run mine at 40V (from a Tek PS503A mounted in a TM501 mainframe, unit connected across the + and - supply terminals, outputs set to +/- 20V). It won't run at 28V. - One needs to be careful as there may be different versions, checking is certainly to be recommended but this comment comes from versions 3, 4, and 5, of the Thunderbolt manual. The ThunderBolt comes with a 24V power supply regulator. A locally supplied +24VDC is required. Power consumption is 15 watts cold and 10 watts steady state. The connector is an AMP mate-n-loc (AMP part number 643228-1). The AMP mate-n-loc mating connectors are listed in the table below. An AMP hand tool (PN 90300-2) may be required.. regards Nigel GM8PZR ___ 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] Thunderbolt not seeing satellites
I'm not sure of the required power spec, but 28V may be too low. These were meant to run off a telco power bus (nominal 48V). I run mine at 40V (from a Tek PS503A mounted in a TM501 mainframe, unit connected across the + and - supply terminals, outputs set to +/- 20V). It won't run at 28V. Input voltage to the poor performing unit is about 28VDC. _ The New Busy is not the old busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_3 ___ 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.
