Lectrosonics M175DC - Manual (Page 5)

Belt Pack Transmitter
Operating Instructions
This section covers adjustments to the transmitter that
must be made before the wireless microphone system
is placed into operation. The step-by-step procedures
are listed in the order in which they should be per­
formed:
1) Turn the wireless receiver power on and make any
required preliminary adjustments in accordance
with instructions in the receiver operating instruc­
tions.
2) Plug the microphone into the transmitter. If you are
using a lavalier or headset microphone, rotate the
plug clockwise to make sure the connection is
locked.
3) Turn the transmitter power on and verify that the red
lamp on it lights. If the lamp is very dim or does not
light, replace the battery.
4) Observe that the RF lamp on the receiver control
panel is lit. This verifies that the receiver is receiv­
ing a usable radio signal from the transmitter.
5) Position the microphone on your person in the
location it will be used during actual operation. If a
headset microphone is being used, adjust the
headband for a comfortable fit with the “gooseneck”
to the left side of your head. Position the micro­
phone element at the corner of the mouth and
rotate the white volume control fully clockwise. The
headset is designed to be worn over the head, but
can also be worn around the neck. Do not position
the microphone pickup directly in front of your
mouth as this may cause unwanted noise from
breath pops as you speak.
WHILE SPEAKING,
ON THE RECEIVER
6) 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 GAIN ADJUST is located on the control
panel of the transmitter as shown below. The
adjustment is made while observing the modulation
level lamps on the receiver control panel:
a) Speak at the voice level you will be using during
actual operation.
b) While speaking, adjust the transmitter gain until the
green modulation lamp on the receiver (may be
marked “-20”) is lit or flickers and the red modula­
tion lamp blinks only on the loudest words. Raise
and lower your voice while observing the lamps.
The red lamp should blink only occasionally.
Note: The modulation lamps on some receivers
are marked or colored differently than just
described. Consult the operating manual for the
receiver in use.
7) You may now adjust the receiver output level
(wireless microphone or mic volume, level, or
volume attenuator) to the desired audio output level.
Consult your receiver manual if you are not sure of
the location of these controls.
The GAIN ADJUST is used only to adjust for proper
modulation level lamp indications. DO NOT use it to
adjust the audio output level of the receiver. 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 transmitter, and there is not time to make
the adjustment for each individual, adjust it for the
loudest voice.
ADJUST THE TRANSMITTER
AS YOU OBSERVE THE LEDs
Rio Rancho, NM 5