Re: [time-nuts] FE-5680A sweep range setting

2014-02-23 Thread Simon Lyons
OK ... I have C245 on the middle board, same as you. Tweaking it and ... Hmmm, it does affect the range (twitchy is an understatement!) but still no lock. To be continued Now by the 'frequency control board' do you mean the board that overlaps the top of the D-Sub connector? I have been a

Re: [time-nuts] FE-5680A sweep range setting

2014-02-22 Thread Simon Lyons
appear to be any PPS output either. These also have a cutout to expose the 15 pin connector that is on the base board in front of the physics package. Paul. On 2/17/14 11:03 PM, Simon Lyons wrote: Hello everyone, I have a 5680 which is failing to lock. My DDS frequency is 8388608Hz, but it&#x

[time-nuts] FE-5680A sweep range setting

2014-02-17 Thread Simon Lyons
Hello everyone, I have a 5680 which is failing to lock. My DDS frequency is 8388608Hz, but it's sweeping between about 8388638 and 8388740. My unit has 3 levels of PCBs in the DDS/VCO corner and there is no trimcap labeled C217. Does anyone know how to adjust the sweep center frequency on this