F R O N T C O N S O L E
C H A P T E R 3
RX Meters
Signal (Signal Level):
Calculates the true RMS power in dBm of the current signal within the
passband, as measured at the selected FLEX-3000 antenna port.
Sig Avg (Signal Average):
Calculates the true RMS power in dBm of a time-averaged signal
within the passband, as measured at the selected FLEX-3000 antenna port.
ADC L (Analog To Digital Left):
Calculates the level in dBFS (decibel full scale) of the Left
input from the internal I/Q ADC.
ADC R (Analog To Digital Right):
Calculates the level in dBFS (decibel full scale) of the Right
input from the internal I/Q ADC.
Off:
Used for debugging purposes or to save CPU cycles on slower machines.
TX Meters
Fwd Pwr (Forward Power):
Reads out forward power minus reflected power in Watts as
measured by the internal ADC on the PA. The meter shows average power.
Note:
In SSB, the typical male voice peak to average ratio is 14dB. This
means that a typical voice without the compressor and/or compander
enabled will only read 4-10W on an
average
meter when
peaking
at
100W.
With the ALC we are using the average power. With these controls,
very high average power can be tolerated.
Ref Pwr (Reflected Power)
: Reads out reflected power as measured by the internal ADC on
the PA.
SWR (Standing Wave Ratio):
Reads out the standing wave ratio as calculated from the
measured forward and reflected power. (Only available with TUN on)
Mic:
Reads modulation power from -20 dB to 3 dB. Ideal operation will peak around 0 dB and
will rarely if ever hit 3 dB. If it is hitting 3 dB, the ALC is cutting back the power. Adjust the MIC
control on the front console to give more or less modulation.
EQ:
Reads the power in dB following the equalizer, where 0dB is ideal. If the equalizer is not
enabled, the equalizer power is equal to the Mic power.
Leveler:
Reads the power in dB following the leveler, where 0dB is ideal. The leveler attempts
to level the voice coming from the microphone as the head and mouth change position relative
to the microphone element. If the leveler is not enabled, this power is identical to EQ.
Lev Gain:
Reads the gain in dB currently being applied by the leveler.
ALC:
Reads the power in dB after the ALC, where 0dB is ideal.
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2003-2009 FlexRadio Systems
