[time-nuts] FE-5680A Question

[Bob Camp]

Hi

If they are looking for a pattern what is the pattern?

Bob



On Feb 13, 2012, at 3:35 PM, paul swed <paulswedb at gmail.com> wrote:

> The reason to sweep low is to establish a particular lock pattern to look
> for.
> Check the programmed offset before retuning. Mine was at mid range 0000
> Search the threads for sending commands to the FE5680.
> 
> On Mon, Feb 13, 2012 at 2:56 PM, Bob Camp <lists at rtty.us> wrote:
> 
>> Hi
>> 
>> For what ever reason, most of the FE's sweep down to about 200 to 250 Hz
>> low. Few sweep more than 50 Hz high. I have one unit that locks fine and
>> only sweeps 5 Hz high.
>> 
>> Yes, I would open it up and re-tune. I think I would only bump it about 50
>> Hz or so. I have no idea *why* they are all tuned low, but there may be a
>> reason (like avoiding a false lock).
>> 
>> Bob
>> 
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Erno Peres
>> Sent: Monday, February 13, 2012 2:17 PM
>> To: time-nuts at febo.com
>> Subject: Re: [time-nuts] FE-5680A Question
>> 
>> 
>> Hi Chris,
>> 
>> thanks for the info. My second problem is that the unit is in locked
>> position
>> after powering up.... but after about 5-8min  the freq goes down slowly
>> about 9.999.997.3 Hz and the lock ind level is still low.....
>> Also noticed that during the sweep  the max freq is 10.000.004 Hz and the
>> min freq is 9.999.750 Hz..
>> I assume that I have to open up the unit and try to re tune  the 10Mhz
>> sweep
>> osci...... let say  from  9.999.900  to 10.000.100 at least.
>> Any suggestion????
>> 
>> Thanks and regards,
>> Ernie.
>> 
>> 
>> 
>> 
>> -----Original Message-----
>> From: Chris Albertson <albertson.chris at gmail.com>
>> To: Discussion of precise time and frequency measurement
>> <time-nuts at febo.com>
>> Sent: Mon, Feb 13, 2012 7:32 pm
>> Subject: Re: [time-nuts] FE-5680A Question
>> 
>> 
>>> From the label I can see it requires +5 Volt but no info about the
>> S232.......
>> Can I adjust the " C " field from the DB9 connector....????
>> On the units that require 5V you can adjust the frequency using rs-232
>> ut only within a very small range around 10MHz.      Some of the
>> ocumentation applies to other types of this same model oscillator.
>> Chris Albertson
>> edondo Beach, California
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