Telex RadioCom BTR-300, Operating Instructions Manual

Page: 32 / 40

SETTING SYS TEM GAIN LEVELS
AD JUSTING GAIN
The gain may need to be ad justed for var i ous
au dio con di tions. The overmodulation LED
will in di cate when the gain is too high. If the
LED is il lu mi nated when you are talk ing, the
gain is too high and will need to be de creased.
If the LED does not flash at all, and the au dio
is low, the gain may need to be in creased. An
oc ca sional flash of the overmodulation in di ca -
tor is fine.
Using a plas tic screw driver (sup plied), ad just
the con trol clock wise to in crease the gain or
coun ter clock wise to de crease the gain. Note
that the gain can also be ad justed by chang ing
the spac ing be tween the mi cro phone and your
mouth.
Fig ure 36
Ad justing Mi cro phone Gain -BTR-300
BTR-300 BASE STATION
The mi cro phone overmodulation in di ca tor for
the BTR-300 head set can be found on the right
side of the front panel. The mi cro phone gain
con trol po ten ti om e ter is lo cated to the left of
the in di ca tor.
TR-300 POR TA BLE
The overmodulation cir cuitry in the TR-300
uses the same LED as the low bat tery cir cuitry.
If mod u la tion is too high this LED will il lu mi -
nate when talk ing.
If the gain needs to be ad justed, re move the
belt clip on the rear of the unit and pry out the
small rub ber plug to the right of the screw
boss. This will re veal the mi cro phone gain con -
trol po ten ti om e ter. Once ad justed, re place the
rub ber plug.
Fig ure 37
Ad justing Mi cro phone Gain -TR-300
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