Hello all, I have an old FE-5680a I bought years ago, that surfaced from my storage boxes the other day. I thought I would experiment with disciplining it to my M12+t GPS. I have some problems adjusting the frequency though. If I put a scope on pins 5 and 7 of the DS80C323 processor, I can see the serial input (ie. 0x2D 0x04 0x00 0x29), but the processor never responds. Has anyone seen this problem before, and is there a way to fix it? Could the serial adjust be disabled? And if so, is there any way to enable it? Thanks in advance, BR Jonas

Did the serial communication ever work?. There is so many variations of the FE's that it's hard to know if it was even supported for that particular model or option. I have one and it has a serial port, but does not respond to any commands. -=Bryan=- ________________________________ From: time-nuts <time-nuts-bounces@febo.com> on behalf of Jonas Jalling <jonas@jalling.dk> Sent: November 19, 2017 12:20 AM To: time-nuts@febo.com Subject: [time-nuts] FE-5680A not responding to serial commands Hello all, I have an old FE-5680a I bought years ago, that surfaced from my storage boxes the other day. I thought I would experiment with disciplining it to my M12+t GPS. I have some problems adjusting the frequency though. If I put a scope on pins 5 and 7 of the DS80C323 processor, I can see the serial input (ie. 0x2D 0x04 0x00 0x29), but the processor never responds. Has anyone seen this problem before, and is there a way to fix it? Could the serial adjust be disabled? And if so, is there any way to enable it? Thanks in advance, BR Jonas _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts time-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> www.febo.com time-nuts is a low volume, high SNR list for the discussion of precise time and frequency measurement and related topics. To see the collection of prior postings to ... and follow the instructions there.

Hi Bryan, I don't know, so probably not. I'll try to make a dump of the firmware, and see if that gets me anywhare. But thank you for your input - now I know that units exist with the serial port disabled. BR Jonas On Mon, Nov 20, 2017 at 8:27 AM Bryan _ <bpl521@outlook.com> wrote: > Did the serial communication ever work?. There is so many variations of > the FE's that it's hard to know if it was even supported for that > particular model or option. I have one and it has a serial port, but does > not respond to any commands. > > > -=Bryan=- > > > ________________________________ > From: time-nuts <time-nuts-bounces@febo.com> on behalf of Jonas Jalling < > jonas@jalling.dk> > Sent: November 19, 2017 12:20 AM > To: time-nuts@febo.com > Subject: [time-nuts] FE-5680A not responding to serial commands > > Hello all, > I have an old FE-5680a I bought years ago, that surfaced from my storage > boxes the other day. I thought I would experiment with disciplining it to > my M12+t GPS. I have some problems adjusting the frequency though. > If I put a scope on pins 5 and 7 of the DS80C323 processor, I can see the > serial input (ie. 0x2D 0x04 0x00 0x29), but the processor never responds. > Has anyone seen this problem before, and is there a way to fix it? Could > the serial adjust be disabled? And if so, is there any way to enable it? > > Thanks in advance, > BR Jonas > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > time-nuts > <https://www.febo.com/cgi-bin/mailman/listinfo/time-nutstime-nuts> Info > Page - American Febo Enterprises< > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > www.febo.com > time-nuts is a low volume, high SNR list for the discussion of precise > time and frequency measurement and related topics. To see the collection of > prior postings to ... > > > > 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. >

BR If you haven't already you may want to have a look at documentation available on the K04BB web site for the 5680A, may luck out and get the serial port working. http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=02_GPS_Timing/FEI/FE-5680A -=Bryan=- ________________________________ From: time-nuts <time-nuts-bounces@febo.com> on behalf of Jonas Jalling <jonas@jalling.dk> Sent: November 19, 2017 11:30 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-5680A not responding to serial commands Hi Bryan, I don't know, so probably not. I'll try to make a dump of the firmware, and see if that gets me anywhare. But thank you for your input - now I know that units exist with the serial port disabled. BR Jonas On Mon, Nov 20, 2017 at 8:27 AM Bryan _ <bpl521@outlook.com> wrote: > Did the serial communication ever work?. There is so many variations of > the FE's that it's hard to know if it was even supported for that > particular model or option. I have one and it has a serial port, but does > not respond to any commands. > > > -=Bryan=- > > > ________________________________ > From: time-nuts <time-nuts-bounces@febo.com> on behalf of Jonas Jalling < > jonas@jalling.dk> > Sent: November 19, 2017 12:20 AM > To: time-nuts@febo.com > Subject: [time-nuts] FE-5680A not responding to serial commands > > Hello all, > I have an old FE-5680a I bought years ago, that surfaced from my storage > boxes the other day. I thought I would experiment with disciplining it to > my M12+t GPS. I have some problems adjusting the frequency though. > If I put a scope on pins 5 and 7 of the DS80C323 processor, I can see the > serial input (ie. 0x2D 0x04 0x00 0x29), but the processor never responds. > Has anyone seen this problem before, and is there a way to fix it? Could > the serial adjust be disabled? And if so, is there any way to enable it? > > Thanks in advance, > BR Jonas > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts time-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> www.febo.com time-nuts is a low volume, high SNR list for the discussion of precise time and frequency measurement and related topics. To see the collection of prior postings to ... > time-nuts > <https://www.febo.com/cgi-bin/mailman/listinfo/time-nutstime-nuts> Info > Page - American Febo Enterprises< > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> time-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> www.febo.com time-nuts is a low volume, high SNR list for the discussion of precise time and frequency measurement and related topics. To see the collection of prior postings to ... > www.febo.com<http://www.febo.com> American Febo Enterprises<http://www.febo.com/> www.febo.com Welcome to American Febo Enterprises! Welcome to American Febo Enterprises, a proud subsidiary of International MultiGeek. AFE is an intergalactic consultatorium ... > time-nuts is a low volume, high SNR list for the discussion of precise > time and frequency measurement and related topics. To see the collection of > prior postings to ... > > > > 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 time-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> www.febo.com time-nuts is a low volume, high SNR list for the discussion of precise time and frequency measurement and related topics. To see the collection of prior postings to ... > 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 time-nuts Info Page - American Febo Enterprises<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> www.febo.com time-nuts is a low volume, high SNR list for the discussion of precise time and frequency measurement and related topics. To see the collection of prior postings to ... and follow the instructions there.