[time-nuts] FE-5680A arrived

[J. L. Trantham]

I tested mine the same way.  Turned out the 'bumps' were real but the
'jitter' was my scopes vertical being 'noisy' and resolved by 'diddling'
with the input amplitude knob.  The sine wave had about 1 V P-P into the 50
ohm input of the TEK 485.

Joe

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Joseph Gray
Sent: Tuesday, January 10, 2012 10:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A arrived


The first power supply I used couldn't provide enough current for the
startup of the heater, so I had to dig out another. After fixing that issue,
the first rubidium unit locked very quickly. For initial testing, I'm using
a scope, triggered on my HP Z3801A. After several minutes of warm up (I
didn't time it), I detect no drift in the rubidium's 10 MHz at all. I do see
a bit of jitter and some "bumps" on the peaks of the sine wave.

I'll cook this one for a while and then try unit number two.

Joe Gray
W5JG

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