Hello Time-Nutters-- I am working on building a downlinking AZ/EL tracking dish set up to receive the 8.2 GHz telemetry from the Suomi JPSS polar orbit meteorological/environmental satellite. The receiver seems to be working OK but it periodically appears to slowly drift frequency by 300 Hz to 400 Hz. I need some way to accurately determine what the actual RX receive frequency is.
I have a vintage Efratom LPRO-101 Rubidium 10 MHz oscillator. I originally got it thinking that it would provide a decent phase-lock reference for my freq-counters, o-scopes, spectrum analyzers and Agilent/HP vector network analyzer. The only other item I have that has (or should have) a reasonably accurate 10 MHz reference output is a Trimble Thunderbolt. However, there is a several hundred Hz freq difference between the Efratom and the Trimble T-bolt. My question is how do I go confirming the frequency of the T-Bolt or the Efratom Rubidium? The Efratom has an adjustment pot to fine-tune its output frequency. How do Time-Nutters go about confirming the accuracy of frequency references such as my T-Bolt or Efratom rubidium oscillator? Thanks for any feedback / suggestions on this !! Off-list communications on this via my email is OK!! Mike Baker [email protected] Micanopy/Gainesville North Central Florida ********************** _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
