[time-nuts] Troubleshooting SR DG435 Four Channel Digital Delay/Pulse Gen
brooke at pacific.net
Mon Jul 2 14:18:13 EDT 2007
The common pin has a 100 ns period wave at + and - 500 mv.
One of the center pins on the INT/EX switch had + and - 1 volt at 100 ns period.
Dr Bruce Griffiths wrote:
> Brooke Clarke wrote:
>>The DG535 Four Channel Digital Delay/Pulse Generator shows
>>Ext Clk Error on power up.
>>The obvious thing to do is turn the rear panel switch to INT, but after
>>powering up with the switch in either position the same error message appears.
>>Connecting an external 10 MHz to the clock input and with the INT/EX switch in
>>either position the same error is there.
>>The on line manual does not have schematics. Any thoughts?
> Is the longtailed pair Q502+ Q503 producing a 10MHz ECL level output signal?
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