ECRESO FM 5kW / 10kW, user manual
–
11/2021
Page 66
WorldCast Systems SAS - 20 avenue Neil Armstrong - 33700 Mérignac (Bordeaux Métropole) FRANCE
+33 (0)5 57 928 928
–
www.worldcastsystems.com
–
contact@worldcastsystems.com
5.13.
Modulation parameters
These parameters are available as:
Front panel *
Modulation menu
see section 6.3.12
Serial commands
MEAS.DEV and CONF
see sections 7.2.2 and 7.2.4
Embedded web site
Transmitter/Modulation pages
see section 8.4.3
* Parameters followed by a star (*) are not available on the front panel.
PEAK
(MEAS.DEV.RMS)
–
read only
This parameter indicates the current value of the transmitted signal’s excursion in
kHz.
From -150 to +150 kHz
MPX DEVIATION
(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
AUDIO DEVIATION
(CONF.DEV.AUDIO)
–
read/write
With this parameter, set the maximum audio 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). The audio deviation is
set automatically when the MPX deviation parameter is set; however, it is possible to set the audio deviation rather
than the MPX deviation. Increasing or decreasing the audio deviation affects the total deviation and thus
automatically adjusts the MPX deviation. Make sure to avoid overmodulation. In case of loss of a sub-carrier (RDS or
SCA) the deviation which was previously allocated to the sub-carrier is allocated to the audio.
From 0 to 150.00 kHz
PILOT DEVIATION
(CONF.DEV.PILOT)
–
read/write
With this parameter, set the 19 kHz pilot deviation. For countries modulating at 75 kHz, the pilot deviation should be
10% of the total deviation, i.e. 7.5 kHz without RDS or 7.1 kHz if RDS is used.
From 0 to 25.5 kHz
RDS DEVIATION
(CONF.DEV.RDS)
–
read/write
With this parameter, set the RDS sub-carrier deviation. The most widely used value is 4 kHz. In case of loss of RDS, this
deviation is allocated to the audio.
From 0 to 25.5 kHz
SCA DEVIATION
(CONF.DEV.SCA)
–
read/write
With this parameter, set the SCA deviation (auxiliary sub-carrier other than RDS), as needed. In case of loss of SCA, this
deviation is allocated to the audio.
From 0 to 25.5 kHz
