Mpx Setup Menu - Crown RFBA Series User Manual

Modulation:
This is the FM modulator output and is expressed in percent, referenced to 75 kHz.
Maximum scale is 127%. In AM mode the reading is expressed in percentage, relative to 100%
modulation. In WX or PS band the reading is expressed in kHz, referenced to 5 kHz deviation.
Deviation Positive:
reading expressed in kHz. Maximum scale is 95.625 kHz and minimum scale is 0 kHz. In AM mode
the reading is expressed in percentage.
Deviation Negative:
reading expressed in kHz. Maximum scale is 95.625 kHz and minimum scale is 0 kHz. In AM
mode the reading is expressed in percentage.
Audio Left:
This is the output of the stereo decoder, measuring the Left signal amplitude
and is expressed in percent, referenced to 75 kHz. Maximum scale is 127 %.
Audio Right:
This is the output of the stereo decoder, measuring the Left signal amplitude
and is expressed in percent, referenced to 75 kHz. Maximum scale is 127 %.
Audio Left+ Right:
of the stereo decoder. This is measuring the level of the L+R portion of the composite signal.
This reading is expressed in log units of dB, referenced to 75 kHz.
Audio Left- Right:
of the stereo decoder. This is measuring the level of the L+R portion of the composite signal.
This reading is expressed in log units of dB, referenced to 75 kHz.
AMN:
AM NOISE: This is the measure of amplitude modulation on the FM signal. This is measured
in percent modulation. This measurement is only valid for a strong signal with no multipath. It is
normally meant to measure any AM modulation that might occur in the power amp stages of the
FM transmitter. This is usually best measured with a direct monitor output from the transmitter.
MPTH:
Multipath: This is the measure of multipath noise on the signal. This is measured in
percent. Values greater than 30% indicate several signal paths at the receiver. The user should use
this indicator to verify proper antenna setup during installation. If this reading is high, the accuracy
of many of the modulation analyzer parameters will be greatly compromised and may be
inaccurate.

MPX Setup Menu

This menu allows user configuration of the MPX output. A description of each of the monitor features is
detailed below:
RFBA & RFBA Plus User Manual
This is the positive peaks of the FM modulator output and is an absolute
This is the negative peaks of the FM modulator output and is an absolute
This is the output of the stereo demodulator prior to the demux operation
This is the output of the stereo demodulator prior to the demux operation
Crown Broadcast
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