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Crown Broadcast FME 350W to 2000W User Manual– 05/2013
Page 57
Crown Broadcast, a division of International Radio & Electronics Corporation 25166 Leer Drive, Elkhart, Indiana, 46514-5425 USA
Ph +1 (574) 262 8900
5.4.5. MPX In menu
MPX1 or MPX2 Sub-menu
These parameters are available as INPUT.MPX1 / INPUT.MPX2 serial commands (see section 6.2.5).
TYPE
(INPUT.MPXn.TYPE) – read/write
This parameter applies a filter to extract the type of signal needed on the MPXn input. This filtered signal will
become the MPXn channel audio signal. Note that when switching from stereo to mono, the total deviation is
maintained.
MO (mono), ST (stereo), ST+R+S (RDS+SCA), ST+R (RDS), RDS, R+S
(RDS+SCA), SCA or NONE
PRESENCE
(INPUT.MPXn.PRESENCE) – read only
This parameter indicates the composition of the signal on the MPXn entry.
MO (mono), MO+R (mono+RDS), MO+R+S (mono+RDS+SCA), ST (stereo), ST+R (RDS)
ou ST+R+S (RDS+SCA)
LEVEL
(INPUT.MPXn.LEVEL) – read/write
This parameter is the max audio peak in dBu that can come from the transmitter on the MPX input. For
example, if the audio peak from the source is +6 dBu, this parameter must be set to +6 dBu for optimal
operation. If you do not know the audio source level, you may use an audio analyzer or display first level
measurements on the front panel to read the MPXn LEVEL. Be aware that if the level is poorly set, the
deviation may become too low or too high. This level is also called nominal level, i.e. the level producing the
deviation as set in the Modulation menu.
From -18 dBu to +18 dBu
DRIVE
(INPUT.MPXn.DRIVE) – read/write
With this parameter, you can slightly compensate the input audio level. It directly affects the final deviation. A
negative value decreases the deviation; a positive value can increase the deviation and/or cause the MPX
hard clipper to be used (if enabled) which in turn may lead to audio distortion. We recommend you leave it at
0 dB.
From -6 dB to +6 dB
RMS
(INPUT.MPXn.RMS) – read only
This parameter indicates the average value of the transmitted signal’s excursion in kHz.
From -150 to +150 kHz
PEAK
(INPUT.MPXn.PEAK) – read only
This parameter indicates the peak value of the transmitted signal’s excursion in kHz.
From -150 to +150 kHz
5.4.6. Player
menu
These parameters are available as INPUT.PLAYER serial commands (see section 6.2.5).
They are identical to LINE2 menu parameters.