User`s manual

Crown Broadcast FME 350W to 2000W User Manual– 05/2013
Page 58
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5.4.7. Audio Gene menu
The audio generator is a multiplex channel and is therefore not affected by the stereo encoder parameters.
These parameters are available as INPUT.AUDIOGEN serial commands (see section 6.2.5).
STATE (INPUT.AUDIOGEN.STATE) – read/write
With this parameter, set the type of MPX signal generated by the internal generator.
OFF, PILOT, L, R, L+R (mono) or L-R (stereo)
PREAC (INPUT.AUDIOGEN.PREAC) – read/write
With this parameter, set the pre-emphasis. Select 0 µs is the audio signal is pre-emphasized before getting
to the transmitter. Otherwise, select according to the country: 50 µs in Europe, 75 µs in the USA.
0, 50 or 75 µs
LEVEL (INPUT.AUDIOGEN.LEVEL) – read/write
With this parameter, set the internal generator audio level.
From -100.00 to 12.00 dBFS
FREQ (INPUT.AUDIOGEN.FREQ) – read/write
With this parameter, set the internal generator audio frequency.
From 0 to 100000.00 Hz
5.4.8. Modulation Menu
These parameters are available as MEAS.DEV and CONF serial commands (see section 6.2.2 and 6.2.3).
RMS (MEAS.DEV.RMS) – read only
This parameter indicates the average value of the transmitted signal’s excursion in kHz.
From -150 to +150 kHz
DEV MPX (CONF.DEV.MPX) – read/write
With this parameter, set the maximum MPX deviation in kHz generated when the audio source is at the
nominal level (the nominal level is set with the LEVEL parameter of the menus: LINE1, LINE2, MPX1 or
MPX2). It is often set at 75 kHz but this value may vary according to the country and relevant regulatory
authorities. To ensure the sub-carrier levels remain stable, this parameter directly changes the audio
deviation.
From 0 to 150.00 kHz