Lectronics LongRanger4 Operating Instructions Manual - page 7
7
Portable Wireless Sound System
Rio Rancho, NM – USA
8) A small screwdriver is supplied with the transmitter. The screwdriver is used to adjust the audio gain of the
transmitter to match your microphone and your voice. The adjustment is made while observing the MOD LEVEL
lamps on the Long Ranger control panel:
a) Speak at the voice level you will be using during actual operation.
b) While speaking, adjust the transmitter gain with the screwdriver until the green MOD LEVEL lamp on the Long
Ranger control panel is lighted or flickers and the red MOD LEVEL lamp blinks on the loudest words. Raise
and lower your voice while observing the lamps. The red lamp should blink occasionally.
9) Now adjust the WIRELESS MICROPHONE VOLUME control on the control panel to a level where everyone can
hear. You will probably have to do this in several steps. If you attempt to adjust the volume yourself while stand-
ing and just behind the unit, you will likely have a “feedback” problem. It is convenient to have another person
adjust the volume while you transmit from a position 20 feet or more behind the unit.
REMEMBER--the transmitter gain control (the screwdriver adjustment) is used only to adjust for proper MOD LEVEL
lamp indications. DO NOT use it to adjust the output volume of the Long Ranger speaker. Different voices and
different microphones will usually require readjustment of the transmitter gain control, so check the adjustment
frequently. If several different people will be using the system and there is not time to make the adjustment for each
individual, adjust it for the loudest voice.
GREEN LED
RED LED
M175 Transmitter
While speaking, Adjust the
transmitter as you observe
the LEDs on the receiver.
OFF
RF
12V DC
OUTPUT
POWER
AUX
WIRELESS
MICROPHONE
VOLUME
MOD
LEVEL
USE
ONLY
DCR1
CHAR
Figure 3 - Transmitter Gain Adjustment