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Davicom FMBM, Reference Manual, March 2015
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4.4.6 Peak Integration Time Constant (JP8, JP11)
Select the proper jumper combination (shown on PCB) to select the peak detector’s
integration time constant. Possible integration times are 1 ms, 2.5 ms and 5 ms (at 99%).
4.4.7 RF level calibration
RF level adjustment is achieved through the FMBM’s internal menus and built-in voltmeter.
This calibration operates in 2 modes, depending on the RF Input that is selected.
Antenna Mode
If you are in Antenna input mode, press the Menu button and scroll down to the Power
Monitor Calibration Menu item.
Press Menu again and you will see the
current value of the reference level:
Press the Up or Down button and you will see:
Pressing Menu here samples the input signal and sets the new reference level to the currently
received signal level and exits the menu item. To exit, simply press the Up or Down buttons
to scroll to the Menu mode exit.
High Level Mode
If you are in High-Level input mode, inject a known RF signal into the unit’s RF input, and
then press the Menu button and scroll down to the Power Monitor Calibration Menu item.
You should see the following screen:
Power Monitor
Calibration
Pwr Mon Cal
^Ref Lvl=-xxdBm
Pwr Mon Cal
^Update Ref Lvl
Power Monitor
Calibration
