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3.4 Input Gain Switches
The "+6 dB" and "+12 dB" slide switches set audio input sensitivity according to the
following table.
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.
3-6
Normal Input
Sensitivity
+10dBm
+4dBm
-2dBm
-8dBm
Illustration 3–4 Input Gain Switches
Switches
+6dB
+12dB
Down
Down
Up
Down
Down
Up
Up
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FM600 User's Manual
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