Crown FM150, User Manual

Page: 40 / 110

3.4 Input Gain Switches
The “+6 dB” and “+12 dB” slide switches set audio input sensitivity according to the
following table.
Illustration 3–4 Input Gain Switches
Find, experimentally, the combination of Input Gain switch settings that will bring the
Wideband gain-reduction indicator to mid scale for “normal” level program material. The
audio processor will accommodate a fairly wide range of input levels with no degradation
of audio quality.
3.5 Processing Control
Two factors contribute to the setting of the Processing control: program material and
personal taste. For most program material, a setting in the range of 40 to 70 provides good
program density. For the classical music purist, who might prefer preservation of music
dynamics over density, 10 to 40 is a good range. The audio will be heavily processed in
the 70 to 100 range.
If the program source is already well processed, as might be the case with a satellite feed,
set the Processing to “0” or “10”.
3.6 Stereo-Mono Switch
The Stereo-Mono slide switch selects the transmission mode. In Mono, feed audio
only to
the left channel
. Although right-channel audio will not be heard as audio modulation, it will
affect the audio processing.
+10dBm Down Down
+4dBm Up Down
-2dBm Down Up
-8dBm Up Up
Normal Input
Sensitivity
Switches
+6dB +12dB
3-6 FM30/FM150/FM300 User’s Manual