HP 5061A Frequency Offset

I compared my old HP 5061A cesium standard against a much newer HP 5071A with high performance tube. Cesium standards are tweaked by adjust an electromagnet in the tube; this adjustment is called the “C Field.” In the 5061A you need to set the C Field manually, but the 5071A does it automatically. With the high performance tube, the 5071A’s absolute accuracy is +/- 5×10. I was able to adjust the 5061A C field to bring it within 1×10-12 of the 5071A. Given the noise floor of the 5061A, that’s about as close as it’s worthwhile to get.


hp5061a_08nov2018


hp5061a_vs_hp5071a_phase_08nov2018

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

RELATED POST

PowerPole Color Conventions

A lot of us use Anderson PowerPole connectors for DC power distribution. There's a nearly universal standard to use red…

USR-IOT Serial-to-Ethernet Converters with Linux

I'm posting this mainly because Google didn't turn up any help when I queried about using the USR-IOT serial port…

GPS Frequency Stability

I couldn't find a nice graph showing the timing performance of a single-frequency, sawtooth-corrected, pulse-per-second output from a GPS. So…

Mini-Circuits Power Amp

Each year at the Dayton Hamvention, the folks at Mini-Circuits have a bunch of odds and ends they sell very…