When I was testing the E1938A I used to run the environmental test chamber up to 85 degrees C, let the unit stabilize for a while, and then dump liquid nitrogen into the chamber to go to -55 degrees C in something like 2 minutes. The temperature inside the crystal oven fluctuated maybe a millidegree and the frequency fluctuated maybe 5 parts in 10^-12 during this event. IE, you don't need to worry about a fan blowing on your OCXO, if it is any good.
Rick On 11/20/2016 6:41 AM, Gary Neilson wrote:
I recently got a HP55300A on ebay for parts. It works fine but runs on 48V. I am going to install a AC supply inside and also place a fan on the top for cooling. I hope the air flow will not cool the OCXO too much. I am also looking for documentation. I have the User manual but am looking for the Programming Manual. Thanks Gary Neilson K5DSR _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
_______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
