User's Manual
Micro Body Pack Transmitter
Rio Rancho, NM
9
Setup Steps
The setup menus are accessed by holding either the 
UP or DOWN arrow while powering the unit on. Refer 
to Setup Screens on the next page for details of each 
setup parameter.
The following list outlines the steps necessary to set up 
the transmitter for normal use.
  1) Install a charged battery.
  2) Set the compatibility mode to match the receiver to 
be used.
  3) Adjust the step size and frequency to match the 
receiver. The frequency is normally determined us-
ing the receiver to identify one within clear operat-
ing spectrum. Refer to the receiver instructions for 
details on using features such as scanning.
NOTE: Some Lectrosonics receivers include an 
IR (infrared) port to transfer settings from the 
receiver to the transmitter. Refer to the section on 
IR (infrared) Sync for details.
  4) Connect the microphone or audio source to be 
used. Select the correct input configuration.
  5) Adjust the input gain. Refer to Adjusting the Input 
Gain for details.
  6) Turn on the receiver and verify that solid RF and 
audio signals are present (see receiver manual).
Locking the Controls
The firmware version is displayed briefly when powering 
up the transmitter.
For firmware versions 1.06 and lower:
Lock the controls by holding the UP and DOWN ar-
rows until a count displayed on the LCD is completed 
and Loc appears on the LCD. To unlock the controls, 
remove the battery.
For firmware versions 1.07 and higher:
Lock the controls by holding the UP and DOWN arrows 
until a count displayed on the LCD is completed and 
Loc appears on the LCD. To unlock the controls, hold 
the UP and DOWN arrows until a count on the LCD is 
completed and unloc appears on the LCD. Removing 
the battery does not unlock the controls.
Adjusting the Input Gain
The two bicolor Modulation LEDs on the control panel 
provide a visual indication of the audio signal level 
entering the transmitter. The LEDs will glow either red 
or green to indicate modulation levels as shown in the 
following table.
Signal Level  -20 LED  -10 LED
Less than -20 dB   Off   Off
-20 dB to -10 dB 
 Green   Off
-10 dB to +0 dB 
 Green   Green
+0 dB to +10 dB   Red   Green
Greater than +10 dB   Red   Red
NOTE: Full modulation is achieved at 0 dB, when 
the “-20” LED first turns red. The limiter can cleanly 
handle peaks up to 30 dB above this point.
It is best to go through the following procedure with the 
transmitter in the standby mode so that no audio will en-
ter the sound system or recorder during adjustment.
1)  With a charged battery in the transmitter, power the 
unit on in the standby mode (see previous section 
Powering On in Standby Mode).
2)  Press and hold the AUDIO button with Aud and a 
numeral on the display (e.g. Aud 22). 
3)  Prepare the signal source. Position a microphone the 
way it will be used in actual operation and have the 
user speak or sing at the loudest level that occur 
during use, or set the output level of the instrument 
or audio device to the maximum level that will be 
used.
4)  Use the 
 and   arrow buttons to adjust the gain until 
the –10 dB glows green and the –20 dB LED starts 
to flicker red during the loudest peaks in the audio.
5)  Once the audio gain has been set, the signal can 
be sent through the sound system for overall level 
adjustments, monitor settings, etc. 
6)  If the audio output level of the receiver is too high or 
low, use only the controls on the receiver to make 
adjustments. Unless the microphone or its position 
changes, or a different instrument is being used, 
leave the transmitter gain adjustment set accord-
ing to these instructions. Use the audio output level 
control on the receiver to make adjustments for 
the desired level being delivered to the connected 
mixer, recorder, etc.










