Paradise P300 specifications Change, BUC/LNB, Tune Ref Menu, Tune Reference50% to nudge

Change, BUC/LNB, Tune Ref Menu

6.12.11Change, BUC/LNB, Tune Ref Menu

This screen is only shown if a tuneable internal reference is fitted (ie something other than the default 1PPM reference).

Tune Reference:[50]% to nudge

YES to accept, NO to89cancel

This screen allows the internal reference oscillator to be calibrated up to about +/- 1PPM (the actual range depends on the exact oscillator option chosen) to compensate for ageing of the quartz crystal.

To calibrate the internal oscillator, either monitor the 10MHz reference if set to be output up the coax, OR, (OFF SATELLITE) set the Tx carrier to the highest possible frequency, engage CW (Carrier Wave) from the test menu, and measure the carrier centre frequency itself.

Needless to say. Ensure whatever you are measuring the frequency with is itself calibrated, warmed up, and significantly exceeds the stability of the reference option fitted to the modem (viewable under Info, This Unit)

P300H P300 Series Modem Installation and Operating Handbook Page 115