Folks,
We have a rubidium oscillator in a laboratory here that is ripe for
calibration against a primary standard. We have installed a Datum 9390
GPS receiver next to it as well as an SR620 counter.
Can any of you recommend a good operating mode to make the SR620 reveal
the rubidium drift rate
Hi , I have looked through the archives occasionally, and finally decided to
subscribe...
I compare 10 MHz frequencies using an SBL-1 mixer and a RS232 enabled DVM.
Connect the two frequencies to be compared to the IF and RF ports, bypass the
LO port for RF, and measure the DC at the LO port.
Hi David:
The most straight forward way is to make a time interval measurement
between the two 1 PPS signals.
It's good to use a BNC-T connector at the SR620 front panel and a scope
so that you can set the trigger levels at 50%.
If both sources are TTL (0 to 5 volts open circuit) and you use the
David Forbes wrote:
> Folks,
>
> We have a rubidium oscillator in a laboratory here that is ripe for
> calibration against a primary standard. We have installed a Datum 9390
> GPS receiver next to it as well as an SR620 counter.
>
> Can any of you recommend a good operating mode to make the SR6
