Operating Instructions - Lectrosonics M175 Operating Instructions And Troubleshooting Manual

Belt pack transmitter

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Instruction manual (8 pages)

Quick start manual (4 pages)

Table Of Contents

Table of Contents

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 performed:

1) Turn the wireless receiver power on and make any required preliminary adjustments in accordance with instruc-

tions in the receiver operating instructions.

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 receiving a useable

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 micro-

phone is being used, adjust the headband for a comfortable fit with the "gooseneck" to the left side of your head.

Position the microphone 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.

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 modulation 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

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.