[time-nuts] DATUM 9390-52054 Grief again...
> I do not recognize the GPS receiver module, but it has the following > number on it: TNL 22880-B. I have the schematics for the overall > DATUM 9390-25054, but the GPS module is just a block. By the way, > the GPS block on the DATUM overall schematic is marked, "SV6 / > (TANS)". I suspect this means something noteworthy. "TNL" is Trimble Navigation Labs (their original name). "TANS" is Trimble Advanced Navigation Sensor, a GPS receiver designed circa 1989 for UAVs and similar mil/aero applications. Almost certainly has six GPS channels. Generally spoke a version of TSIP, like the Thunderbolts. Often RS-422. "SV6" as someone else mentioned, is another Trimble 6-channel receiver from the same era. I think it was more commercial than military. Probably also spoke TSIP. 22880 is the Trimble part number for the board you have, rev B. Trimble used random 5-digit part numbers until very recently, when they had to go to six digits because they'd used up all the 5-digit numbers. That only took about 25 years. :) You might be able to hook up Lady Heather to snoop the receiver communications on one of your good Datum units. If that works, you might be able to hot-wire a Thunderbolt in place of your dead 22880 board (assuming it really is dead). Cheers! --Stu ___ 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] DATUM 9390-52054 Grief again...
Hal, The two Dautm 9390-52054's that I have are about 15 to 20 years old. I did a google search earlier, but didn't find anything that quite looks like the GPS module inside my unit. I don't know if I can post a picture to this site, but I'll take a picture of the GPS module and give it a try. Since I posted the first and 2nd message about this problem, I've since posted what I'm sure is an error message: N200/S116/DT202KP. I have no idea what this is telling me. Thanks for your input. Burt At 04:12 PM 4/6/2013, time-nuts-requ...@febo.com wrote From: Hal Murray Subject: Re: [time-nuts] DATUM 9390-52054 Grief again... b...@att.net said: > By the way, the GPS block on the DATUM overall schematic is marked, "SV6 / > (TANS)". I suspect this means something noteworthy. SV6 or SVeeSix is an old old old Trimble module. Google finds stuff. I picked up a couple many years ago, or at least they were described as SV6. They match the picture here, including the box around the PCB. http://homepages.slingshot.co.nz/~geoff36/gps.htm I think they were used for tracking trucks. The PCB inside the box is 1.8 x 3.3 inches. That doesn't match the picture I found in a manual from Trimble. Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK ___ 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] DATUM 9390-52054 Grief again...
b...@att.net said: > By the way, the GPS block on the DATUM overall schematic is marked, "SV6 / > (TANS)". I suspect this means something noteworthy. SV6 or SVeeSix is an old old old Trimble module. Google finds stuff. I picked up a couple many years ago, or at least they were described as SV6. They match the picture here, including the box around the PCB. http://homepages.slingshot.co.nz/~geoff36/gps.htm I think they were used for tracking trucks. The PCB inside the box is 1.8 x 3.3 inches. That doesn't match the picture I found in a manual from Trimble. -- These are my opinions. I hate spam. ___ 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] DATUM 9390-52054 Grief again...
(Note: additional information about the receiver module has been added.) Burt Gang, You will remember several months ago I had some stranges that I thought were related to a defective Vectron oscillator in one of my DATUM 9390-52054. That turned out to be a the internal switching power supply so I replaced it with an external Cisco unit. I've done this in three units, two are mine and one belongs to Stu, K6YAZ. Well, I now have a different grief in one of my units. It had been cooking along swell with no problem ever since I replaced the power supply. This morning I notice that one of my units had the lock and tracking lights out. The display said that the signal level was low and there were no usable satellites. The 10 MHz output is also about 20 or more dB low. I assumed the power supply is all right because the display was working and it said it was 9-E9, not so good, but working - sorta. I swapped antennas and the good Datum was happy so I know the antenna is ok. when I got inside I checked the power supply rails and they're within .05 Volts of where they should be. There is 5 Volts on the GPS module and there is 4.96 Volts on the antenna Type-N connector (measured with the antenna line disconnected.) Power cycling the DATUM did not resolve the problem. Does anyone know if the symptoms above will occur if the 10 MHz oscillator is defective? I can understand it not tracking or not locked, but could this cause the receiver to not see or indicate any satellites? Since I only have two of these units on line, I'm very reluctant to start swapping modules because I would be without any working reference, so I need to keep one up and running. Both of my units are on a UPS, and according to the clocks in the kitchen, the bedroom, and the old VCR, we've not had a power interruption. I do not recognize the GPS receiver module, but it has the following number on it: TNL 22880-B. I have the schematics for the overall DATUM 9390-25054, but the GPS module in just a block. By the way, the GPS block on the DATUM overall schematic is marked, "SV6 / (TANS)". I suspect this means something noteworthy. Any guidance would be appreciated. Thanks, Burt Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK ___ 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] DATUM 9390-52054 Grief again...
Gang, You will remember several months ago I had some stranges that I thought were related to a defective Vectron oscillator in one of my DATUM 9390-52054. That turned out to be a the internal switching power supply so I replaced it with an external Cisco unit. I've done this in three units, two are mine and one belongs to Stu, K6YAZ. Well, I now have a different grief in one of my units. It had been cooking along swell with no problem ever since I replaced the power supply. This morning I notice that one of my units had the lock and tracking lights out. The display said that the signal level was low and there were no usable satellites. The 10 MHz output is also about 20 or more dB low. I assumed the power supply is all right because the display was working and it said it was 9-E9, not so good, but working - sorta. I swapped antennas and the good Datum was happy so I know the antenna is ok. when I got inside I checked the power supply rails and they're within .05 Volts of where they should be. There is 5 Volts on the GPS module and there is 4.96 Volts on the antenna Type-N connector (measured with the antenna line disconnected.) Power cycling the DATUM did not resolve the problem. Does anyone know if the symptoms above will occur if the 10 MHz oscillator is defective? I can understand it not tracking or not locked, but could this cause the receiver to not see or indicate any satellites? Since I only have two of these units on line, I'm very reluctant to start swapping modules because I would be without any working reference, so I need to keep one up and running. Both of my units are on a UPS, and according to the clocks in the kitchen, the bedroom, and the old VCR, we've not had a power interruption. I do not recognize the GPS receiver module, but it has the following number on it: TNL 22880-B. I have the schematics for the overall DATUM 9390-25054, but the GPS module in just a block. Any guidance would be appreciated. Thanks, Burt Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK ___ 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.
