Operator`s manual

Page 9
Section 2 Operation (Continued)
2.2 Optional EnviroMic and Smart-Mic (Continued)
1. The EnviroMic option allows both the environmental sounds and the
speaker’s voice from the transmitter to be heard simultaneously. The
Smart-Mic option automatically prioritizes the speaker’s voice from the
transmitter over the environmental sounds. When the speaker stops
talking, the Smart-Mic immediately amplifies the environmental sounds.
The environmental gain is set at the factory to a suitable level; however,
if a gain adjustment is necessary, the following procedure should be used:
a. Check that the environmental mic switch is turned “ON” (set to the right).
See Section 1.3.
b. With the small screwdriver provided, turn the microphone gain control
fully counterclockwise for low gain before the PR-216 receiver power
switch is turned “ON”.
c. Slowly turn the environmental microphone gain control clockwise until
your voice level matches the voice level of the speaker using the wireless
microphone transmitter. If higher microphone sensitivity level is required,
additional gain can be used but only up to the threshold of feedback.
Note: Higher gain settings will bring up the voice signal as well as the
background noise. Higher gain settings should only be used in a low
noise environment.
d. The Smart-Mic option incorporates a speech recognition circuit.
However, excessively high environmental noise level around the M-216
transmitter’s clip-on omni-directional microphone may cause the
Smart-Mic’s voice recognition function to not operate properly. It may
then be necessary to adjust the microphone sensitivity control down or
use the optional HH-100H head-worn , noise-cancelling microphone.
2. The option “P” micro-mini 2.5mm jack uses the M-4020P plug-in
environmental microphone for either EnviroMic or Smart-Mic operation.
This input jack may also be used with other accessories such as hand-held
directional microphones, clip-on speech training microphones, and telephone
adapters. Consult COMTEK’s technical services to ensure compatibility.