[time-nuts] getting a grip on 10811 drift (trying to read my instruments)

[Bob Camp]

Hi

I think I'd try grounding pins 4 and 5….

Bob

On Nov 15, 2012, at 11:15 PM, Chris Howard <chris at elfpen.com> wrote:

> On 11/15/2012 3:49 PM, Charles P. Steinmetz wrote:
> .90 VDC           9,999,999.90
>> 
>> How and where are you measuring the EFC voltage?  Are you sure the
> voltage on the EFC pin of the 10811 (Pin 6) was the same as you measured?
> Was the EFC return pin (Pin 5) connected to the oscillator supply return (Pin 4)?
> If it is left floating, the EFC will not work properly.
>> 
> 
> I was measuring with a cheap digital multimeter between pins 5 and 6.
> According to the documentation I have, pins 2, 4, and 5 are all tied
> together internally and pin 2 is connected to ground on my controller card
> (and the controller card is grounded to the case via both power
> supply wires and mounting hardware)
> 
> I can send commands to the controller card and run the voltage
> up and down as expected.
> 
> But those are good questions.  I should test again with
> a test harness and different power supply when I get the
> oscillator out of the device.
> 
> 
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