PM-CH7 Version 1.0
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PM-CH7
Preamplifier
5.3.
SPEECH FILTER ON / OFF
The channels CH1-CH6 have a speech filter that can enabled or disabled by the corresponding
jumper (SW1, SW2, SW3, SW4, SW5, SW6) on the PCB. The speech filter improves speech
intelligibility by cutting off the lower frequencies.
5.4. VOX
The channels CH1-CH6 have VOX function that can be enabled or disabled by the
corresponding jumper (JUMPER 1, JUMPER 2, JUMPER 3, JUMPER 4, JUMPER 5, JUMPER
6) on the PCB. The VOX function can override other lower priority channels.
5.5.
NOISE GATE (VCA)
This equipment includes a general noise gate function activated by Jumper SW7 and
adjustable by potentiometer P19, both controls situated on PCB board.
