Re: [time-nuts] FE-5680A no 10MHz RF output?
Message: 3 Date: Sat, 24 Nov 2012 11:10:02 -0600 From: Ed Palmer ed_pal...@sasktel.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] FE-5680A no 10MHz RF output? Message-ID: 50b0ff6a.7030...@sasktel.net Content-Type: text/plain; charset=windows-1252; format=flowed I have a similar unit that I picked up a few years ago. It only has a 1 PPS output. That's the way it was designed. There are so many different versions of this stupid model that it's impossible to be sure what you're buying until you get it on your bench. If yours is like mine, the DDS is putting out 2^23 Hz (~8.39 MHz) which then goes through a fixed divider to 1 Hz. You can access the 8 MHz signal via a tiny socket on the DDS board. There is info online on how to modify the unit to bring that signal out to a connector and program it for other frequencies. If you change the frequency, the 1 PPS also changes frequency. Ed Ugh... Hopefully he'll let me return it. This is the first time I've bought an $80 item from China and I've been burned :( JP -- *Integrity is a binary state - either you have it or you don’t.* - John Doerr ___ 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] FE-5680A no 10MHz RF output?
Am 25.11.2012 18:29, schrieb James Peroulas: Message: 3 Date: Sat, 24 Nov 2012 11:10:02 -0600 From: Ed Palmered_pal...@sasktel.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] FE-5680A no 10MHz RF output? Message-ID:50b0ff6a.7030...@sasktel.net Content-Type: text/plain; charset=windows-1252; format=flowed I have a similar unit that I picked up a few years ago. It only has a 1 PPS output. That's the way it was designed. There are so many different versions of this stupid model that it's impossible to be sure what you're buying until you get it on your bench. If yours is like mine, the DDS is putting out 2^23 Hz (~8.39 MHz) which then goes through a fixed divider to 1 Hz. You can access the 8 MHz signal via a tiny socket on the DDS board. There is info online on how to modify the unit to bring that signal out to a connector and program it for other frequencies. If you change the frequency, the 1 PPS also changes frequency. Ed Ugh... Hopefully he'll let me return it. This is the first time I've bought an $80 item from China and I've been burned :( JP If this is so, it has to be a very unfortunate mischance. I've been trading with China numerous times, there was nothing to fault on. Cheers Volker ___ 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] FE-5680A no 10MHz RF output?
Look on Didier's site or TvB's and you should find the hack that turns the 5680A into a variable output frequency device; there's a DDS with an rs232 interface. All is not lost? Don L Volker Esper Am 25.11.2012 18:29, schrieb James Peroulas: Message: 3 Date: Sat, 24 Nov 2012 11:10:02 -0600 From: Ed Palmered_pal...@sasktel.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] FE-5680A no 10MHz RF output? Message-ID:50b0ff6a.7030...@sasktel.net Content-Type: text/plain; charset=windows-1252; format=flowed I have a similar unit that I picked up a few years ago. It only has a 1 PPS output. That's the way it was designed. There are so many different versions of this stupid model that it's impossible to be sure what you're buying until you get it on your bench. If yours is like mine, the DDS is putting out 2^23 Hz (~8.39 MHz) which then goes through a fixed divider to 1 Hz. You can access the 8 MHz signal via a tiny socket on the DDS board. There is info online on how to modify the unit to bring that signal out to a connector and program it for other frequencies. If you change the frequency, the 1 PPS also changes frequency. Ed Ugh... Hopefully he'll let me return it. This is the first time I've bought an $80 item from China and I've been burned :( JP If this is so, it has to be a very unfortunate mischance. I've been trading with China numerous times, there was nothing to fault on. Cheers Volker ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com ___ 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] FE-5680A no 10MHz RF output?
I have a similar unit that I picked up a few years ago. It only has a 1 PPS output. That's the way it was designed. There are so many different versions of this stupid model that it's impossible to be sure what you're buying until you get it on your bench. If yours is like mine, the DDS is putting out 2^23 Hz (~8.39 MHz) which then goes through a fixed divider to 1 Hz. You can access the 8 MHz signal via a tiny socket on the DDS board. There is info online on how to modify the unit to bring that signal out to a connector and program it for other frequencies. If you change the frequency, the 1 PPS also changes frequency. Ed On 11/24/2012 10:53 AM, James Peroulas wrote: I received a 'programmable' FE-5680A from nichegeek recently and I'm able to get it to lock (pin 3 goes low) and produce a PPS output (pin 6). However, it never produces a 10MHz output on pin 7. Is this unit defective, or is there something I might be doing wrong? My unit is labeled: FE-5680A UN 32575 S/N 45531 Revision: B. It's pretty banged up too, like someone took a drill to it :( James ___ 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.
