Crown FM30 - Input Gain Switches; Processing Control; Stereo-Mono Switch

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FM30/100/250 User's Manual
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 satel-
lite 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.
Nominal Input Switches
Sensitivity +6 dB +12 dB
+10 dBm Down Down
+4 dBm Up Down
-2 dBm Down Up
-8 dBm Up Up