[time-nuts] Re: CTI OSC5A2B02 OXCO testing

[Reginald Beardsley]

That's the spec on the *new* part. These are salvage from decomissioned cell transceivers.They've probably been drifting for 20+ years. Point is they still work. They just need personalized care and feeding.

The tuning voltage is irrelevant so long as you have a low tempco divider and stable voltage reference to provide that.

That is the current task, determine what I need for the voltage dividers and order them. $$$ :-(

Buy some and test them.

Reg




     On Saturday, June 3, 2023 at 08:46:36 PM CDT, Bob Camp via time-nuts <time-nuts at lists.febo.com> wrote:  
 
 Hi

Per the published spec on the part, it should hit 10 MHz at 2.0 V. 

A properly working part should move 5 to 10 Hz for a half volt change
(like the one from 1.9942 to 2.6832 V. 

With any OCXO, meaningful data can only be taken after the part has
warmed up. For accurate data, something like a 24 hour warmup is 
a pretty good idea.

Bob

> On Jun 3, 2023, at 4:40 PM, Reginald Beardsley via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> 
> Here are the results of my preliminary test using just a bench supply and 5386A on the internal XOCO. I just adjusted the Vref until I got within 1 Hz. PSU is settable in 10 mV steps. Data are from my 34401A.
> 
> Vref MHz
> 
> 1.5819 10.000000??
> 
> 1.7758 10.00000015
> 
> 1.6924 10.00000010
> 
> 1.7740 10.00000050
> 
> 2.0853 10.00000047
> 
> 1.9374 10.00000040
> 
> 2.1520 10.00000075
> 
> 23708 10.00000073
> 
> 1.9942 10.00000046
> 
> 2.6832 10.00000065
> 
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