EXC-GT – FM super-compact transmitter series
User’s manual – Page 37 of 98
The display shows the following:
Mpx
– followed by the deviation value, expressed in KHz (in the example, 80.2 KHz) and in dB, in reference to a deviation of 75 KHz (0dB = 75
KHz)
Nom. input
– nominal value of low frequency input level (in the example, + 6.0 dBm)
Use of this menu is described in section 8.1.d.
10.3.d AUX SENS (RDS/SCA sensitivity modulation) setting
Used to adjust the present modulation result of the single auxiliary signal (RDS/SCA).
The display shows the following:
Aux
– followed by a deviation value expressed in KHz (in the example, 1.9 KHz) and in dB, in reference to a deviation of 75 KHz (0dB = 75
KHz)
Nom. input
– nominal value of auxiliary signal input level
To change the auxiliary modulation:
1)
Ensure that the
EDIT
option is selected; otherwise, turn the knob to select it, then press to confirm.
2)
A value will be indicated after
Nom. input
. This indicator is normally predefined at
+0.0 dBm
.
3)
Turn the knob to change the value, based on the modulation level used. The peak deviation indicated by
Aux
, expressed in
KHz, will consequently change. You will note that, to the right of the deviation, the value of the modulating signal will be
indicated in dB, against the nominal value set.
4)
Ensure that the deviation measured does not exceed local regulations, then press the knob to confirm the setting.
5)
Using the knob, select
OK
to save the settings,
EDIT
to make further changes, or
ABORT
to exit without saving the new
settings, then press to confirm (for further details regarding these commands, see
2
9.4.a).
10.3.e LIMITER
setting
Used to limit the peak modulation at a maximum value.
The display shows the following:
Limiter
– followed by
OFF
if deactivated, or by a value expressed in dB, in reference to a deviation of 75 KHz (0dB = 75 KHz)
Mpx
– measurement of the current peak deviation value, expressed in KHz (in the example, 81.4 KHz) in dB, in reference to a deviation of 75
KHz (0dB = 75 KHz)
In addition, the bar indicator graphically shows the current peak deviation value.
By changing the
Limiter
, you can set a maximum modulation value beyond which the limiter will activate. Use of this menu is
