[time-nuts] Lucent RFTG-U - add GPS module
I noticed the Lucent RFTG-U has mounting for a Motorola type GPS module. Has anyone successfully mounted a GPS module in a Lucent RFTG-U and got it working? Different firmware? -marki ___ 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] 10811 Outer oven controller schematic
Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ 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] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ 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] 10811 Outer oven controller schematic
Marki Funny timing. I am working on a 10811 from a z3801 and am working towards opening the can its soldered. Steve Smiths posts have been very helpful. But I am dealing with lots of black melted goo. Not really from heat. Just age the way a lot of things deteriorate. That said I will be trying to figure out why the 10811 is -45Hz at temp. Thats sounds very bad and hope the rocks not the issue. But good to read improvements also. Regards Paul WB8TSL On Sat, Jul 20, 2013 at 11:21 AM, Mark C. Stephens ma...@non-stop.com.auwrote: Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ 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] 10811 Outer oven controller schematic
Paul, If the 10811 is that far off, are you sure the oven is working? A few years ago mine had a failure of a particular date code range of the opamp that controls the oven, that were prone to failure.at high temperature. The symptom in the Z3801A was that the outer oven seemed bad - it did not turn on, but it was because it was waiting for the inner one to reach nominal temperature, but it never did. Once you get it all apart, replacement of the IC is no big deal, but what a PITA to get to it. I vaguely recall posting the whole story on that website that has big coverage of the Z3801A - I can't remember the name, since I haven't been there in a while, but it should be easy to find. The website had all kinds of Z3801A info, including a nice writeup on how to take the oven apart, which is where I started. Ed ___ 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] 10811 Outer oven controller schematic
Hi If a 10811 oven is simply not working, the output will be 400 Hz off frequency. Bob On Jul 19, 2013, at 12:48 PM, ed breya e...@telight.com wrote: Paul, If the 10811 is that far off, are you sure the oven is working? A few years ago mine had a failure of a particular date code range of the opamp that controls the oven, that were prone to failure.at high temperature. The symptom in the Z3801A was that the outer oven seemed bad - it did not turn on, but it was because it was waiting for the inner one to reach nominal temperature, but it never did. Once you get it all apart, replacement of the IC is no big deal, but what a PITA to get to it. I vaguely recall posting the whole story on that website that has big coverage of the Z3801A - I can't remember the name, since I haven't been there in a while, but it should be easy to find. The website had all kinds of Z3801A info, including a nice writeup on how to take the oven apart, which is where I started. Ed ___ 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] 10811 Outer oven controller schematic
Hello to the group. As the various posts mention pulling the outer oven and taped wire off is a job. But thats done. The Osc is 45 Hz low hot and 200 Hz low cold. Bobs on target with his comment on what to expect. It does warm up and behave as you might expect but its all relative not exact even according to the 10811 service manual. So it could be off temperature. But very hard to say until I get a thermocouple in there. Will say the various rubbery stuff and shock absorbing stuff left one heck of a gooey mess. Oily sticky stuff.I tried oil, alcohol, turpentine, and finally gas. None really did anything. But what did was a soft plastic paint remover. That peeled the old tape and goo off very nicely. What was left was the true glue and that was removable by gas. It went from a gooey mess that stuck to everything to a pretty clean can. Next I used a small torch one of those small butane refillable units. Had it for years and never really had a use for it till now. I have started the process of opening the can. Thats not complete yet. But I cleaned enough goo off that when I heat things I don't have a smelly smoldering mess. Regards Paul WB8TSL On Sat, Jul 20, 2013 at 1:57 PM, Bob Camp li...@rtty.us wrote: Hi If a 10811 oven is simply not working, the output will be 400 Hz off frequency. Bob On Jul 19, 2013, at 12:48 PM, ed breya e...@telight.com wrote: Paul, If the 10811 is that far off, are you sure the oven is working? A few years ago mine had a failure of a particular date code range of the opamp that controls the oven, that were prone to failure.at high temperature. The symptom in the Z3801A was that the outer oven seemed bad - it did not turn on, but it was because it was waiting for the inner one to reach nominal temperature, but it never did. Once you get it all apart, replacement of the IC is no big deal, but what a PITA to get to it. I vaguely recall posting the whole story on that website that has big coverage of the Z3801A - I can't remember the name, since I haven't been there in a while, but it should be easy to find. The website had all kinds of Z3801A info, including a nice writeup on how to take the oven apart, which is where I started. Ed ___ 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] Tboltmon AMU range
I moved my Trimble bullet up the pole to have a 360 degree unobstructed view and now the AMUs for the SVs are reading in the 39-50 range. Is this too high or normal? Russ ___ 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] 10811 Outer oven controller schematic
The original post has updated Circuit (different transistors and less minor changes) Also now included is the circuit of the inner oven controller. http://www.vk2hmc.net/blog/?p=526 -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 21 July 2013 1:21 AM To: time-nuts@febo.com Subject: [time-nuts] 10811 Outer oven controller schematic Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ 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] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
I did a quick check of the antenna current on a normal (un-attenuated) vs. the attenuated receiver: Normal: Antenna current: 26.470589 Attenuated: Antenna current: 32.352940 Slightly higher, but well within range. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 21 July 2013 8:24 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. OK, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote: Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ 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] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Hi Pad = resistor in series with the dc. That will drop the voltage on the amp in the antenna. Not a good idea. Bob Sent from my iPhone On Jul 20, 2013, at 9:26 PM, Mark C. Stephens ma...@non-stop.com.au wrote: I did a quick check of the antenna current on a normal (un-attenuated) vs. the attenuated receiver: Normal: Antenna current: 26.470589 Attenuated: Antenna current: 32.352940 Slightly higher, but well within range. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 21 July 2013 8:24 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. OK, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote: Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ 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 mailing list -- time-nuts@febo.com To unsubscribe, go to
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Bob - Pad is connected between Distribution amp that powers antenna from separate supply. Good idea. I haven't bothered measuring the voltage at the output of the pad, perhaps a simple calculation for you? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Sunday, 21 July 2013 12:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. Hi Pad = resistor in series with the dc. That will drop the voltage on the amp in the antenna. Not a good idea. Bob Sent from my iPhone On Jul 20, 2013, at 9:26 PM, Mark C. Stephens ma...@non-stop.com.au wrote: I did a quick check of the antenna current on a normal (un-attenuated) vs. the attenuated receiver: Normal: Antenna current: 26.470589 Attenuated: Antenna current: 32.352940 Slightly higher, but well within range. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 21 July 2013 8:24 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. OK, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote: Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ 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
