Hi I suspect the key to your issues are the FPGA error codes. It’s likely that a lot of the “work” is done in the FPGA. If it is not setting up properly, you will get all sorts of problems.
Try: 1) Unplug the memory chips and plug them back in. Sockets can have issues … 2) Look for tin whiskers around the FPGA pins. Sometimes a good scrub with a toothbrush is quicker than looking. 3) There has to be a clock signal into the FPGA. It may be the 5 /10 /15 MHz, it may be something else. Run around the “good” unit with a scope and then do the same on the bad one. If the box is still inside the 30 day warranty - send it back. Even if it isn’t, contact the seller. Bob > On Nov 30, 2014, at 10:50 AM, Götz Romahn <[email protected]> wrote: > > hello Tom, > thank you for your kind response. > All voltage levels are fine and I have 5MHz as well as 15MHz on the > board. DC levels at transistors I testet were not suspicious. > I have no idea where how the 10MHz is generated. I do not see any > doubler active but see a tripler at 15MHz. > May be the community can explain my error listings especially the > "OSC_DEL, error code: 01H". OCXO has good output and heater seems to be > ok as well as EFC. > cheers Götz > > > Am 30.11.2014 05:59, : >> Hello Götz, >> >> I think I saw the 10 MHz on several points. At least one of the nearby >> transistors also showed some signal. I have another project on the bench >> right now but when it is done, I'll throw the ref-1 back on the bench >> and make some notes. Do you have the 15 MHz and is the 5 MHz oscillator >> running? How about the supply voltages? They are marked and have test >> points. Also, you could make some DC measurements on the two transistors >> as they are standard SMT devices. >> >> Sure wish someone would shake a schematic out of the woods. >> >> >> Best regards, >> Tom Miller, >> Forest Hill, Maryland >> WA3PZI >> >> >> ----- Original Message ----- From: "Götz Romahn" <[email protected]> >> To: <[email protected]> >> Sent: Friday, November 28, 2014 12:23 PM >> Subject: Re: [time-nuts] Lucent KS-24361 >> >> >>> hi Tom, >>> from your postings at [time nuts] I've read, that you have found >>> several locations with 10 MHz signal on the backside of the >>> REF-1/REF-0 boards. My problem is, my REF-1 has run into fault mode >>> and the 10 MHz at the collector of Q208 is missing now. It was there >>> before the failure occurred. Retracing the PCB connections for the >>> source of the 10 MHz is not so easy with no active signal. It would be >>> very helpful if you could provide some more positions where I should >>> see the 10 MHz as this could help help finding the reason of the failure. >>> >>> :diag:log:read:all? gives >>> scpi > Log status: 10 entries >>> >>> Log 001:20141120.00:02:37: Log cleared >>> Log 002:20141120.00:00:00: Power on >>> Log 003:20141120.00:00:00: FAIL: OSC_DEL, error code: 01H >>> Log 004:20141120.00:00:01: FAIL: FPGA, error code: 01H >>> Log 005:20141120.00:00:01: FAIL: INT_REF, error code: 01H >>> Log 006:20141120.00:00:01: Self-test failed >>> Log 007:20141120.00:00:01: Failed mode entered >>> Log 008:20141120.00:00:01: Antenna fault set >>> Log 009:20141120.00:00:02: 1PPS output failure set >>> Log 010:20141120.00:00:02: Power settings ok, Int: 17 dBm, Ext: 17 dBm >>> >>> thanks in advance for your efforts and have a good time at >>> thanksgiving Goetz (Berlin, Germany) >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
