Lectrosonics MM400a - Manual - Manual (Page 9)

Frequency Agile UHF Miniature Belt-Pack Transmitter
OPERATING INSTRUCTIONS
WARNING! TO PREVENT INTERNAL CORROSION!
If the transmitter is wet (either due to immersion or high levels of perspiration), BEFORE opening any covers or
connectors, carefully blot the transmitter dry with a clean paper towel or cloth. Remove all moisture. After
opening any connector or cover, carefully blot up any remaining moisture that may have remained around the
seal. THIS IS IMPORTANT! DO NOT CLOSE ANY COVER OR CONNECTOR BEFORE MAKING
CERTAIN THERE IS NO MOISTURE IN OR NEAR THE OPENING. After use, it is important to store the
transmitter in a dry place with all access doors and connectors opened to allow any internal humidity to
evaporate. Specifically, open the battery door, the frequency cover plate and fully unscrew and remove the
microphone connector before storing. Do NOT store wet and do NOT store sealed. If moisture is sealed inside
the unit it has nowhere to go other than to chemically react with and destroy components and the printed circuit
board.
SELECTING THE COMPATIBLITY MODE
All Digital Hybrid units are capable of working with
Lectrosonics MM400A transmitter, and by setting the
proper compatibility mode, the unit will also work with
200 Series and 100 Series analog receivers, plus some
other analog wireless receivers (contact the factory for
details). The transmitter must be set to the operating
mode of the matching receiver, which is easily done
using a small screwdriver and a battery.
NOTE
The unit comes from the factory as a 400 series transmitter
1) Set the audio controls for the corresponding
receiver to off.
2) Install a good battery and verify the Power LED
glows green. Also verify the current Compatibility
Mode by observing the Modulation LEDs. The –20
and –10 LEDs will blink simultaneously:
• Once for 100 Series mode
• Two times for 200 Series mode
• Three times for “Other” receivers
• Four times for 400 Series mode
–10
–20
POWER
Modulation LEDS
Power LED
3) Remove the battery.
4) Open the Frequency Select Switch cover and with
a small screwdriver (included with your unit), set
the Fequency Select Switches to CC. (for Change,
Change).
0 1
2
3
4
5
6
7 8 9
A
B
C
D
E
F 0 1
2
3
4
5
6
7 8 9
A
B
C
D
E
F
Frequency Select Switch Cover
Frequency Select Switches
Battery Compartment Cover
5) Install the battery to power up the unit briefly – just
a couple of seconds (just watch for the LED’s to
light up) and then remove the battery.
6) Change the Frequency Select Switch settings to
one of the following positions:
• 100 Series mode: 1,1
• 200 Series mode: 2,2
• Mode 3 (Contact dealer for details): 3,3
• 400 Series mode: 4,4
7) Install the battery, as soon as the Power LED and
Modulation LEDs glow, remove the battery.
8) Set the Frequency Select switches to 0,0.
9) Turn on the transmitter top verify the compatiblity
mode for the unit has changed.
Note
Each time the transmitter is turned on, it
will confirm the current operating mode
Rio Rancho, NM – USA 9