Stryker SR-955HPC User Manual page 6

Microphone Gain: Adjusts the microphone gain in the transmit and
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PA modes. This controls the gain to the extent that full talk power is
available several inches away from the microphone.
RF Gain: This control is used to reduce the gain of the RF (receive)
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amplifier under strong signal conditions. For maximum receiver
sensitivity this control should be turn all the way to the right
(clockwise).
Noise Blanker / ANL Switch:
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the noise Blanker circuits are activated. The Noise Blanker is very
effective in eliminating repetitive pulse type noise usually associated
with ignition systems. The ANL position activates both the Noise
Blanker and Automatic Noise Limiter (ANL) Circuitry.
Echo Volume: Varies the volume or number of echo repetitions. To
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increase the echo volume, rotate the control clockwise.
Echo Delay: The Echo switch turn the echo on. A big advantage to
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this is you can turn it off and then back on with the switch without the
need to adjust your volume & delay potentiometer. To turn the echo
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off simply move the switch to the middle position.
Fin: This is the fine control for the clarifier. Please refer to the function
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menu section for specific options related to this control. With the
clarifier in the default mode, the fine knob would be used to fine tune
your receiving frequency. In general this is typically on used on SSB.
COA: This is the coarse control for the clarifier. With the clarifier in
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default mode, the coarse knob would be used in conjunction with the
fine knob to tune in the station you communicating with. Both knobs
increase frequency when turned clockwise and decrease when turned
counter clockwise.
Channel Selector: This control is used to select the desired transmit
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and receive channel.
When this switch is in the NB position