Lectrosonics FM875 - Manual (Page 6)

TRANSMITTERS
Standard FM-AV4 systems include an M175 belt-pack transmitter which is designed to be used with a
lavalier or headset microphone. If you have one of the other optional Lectrosonics transmitters, consult
the supplied manual for that transmitter for the description and operating instructions.
The MIC JACK is a locking micro jack that supplies "phantom power" for electret microphones such as the
Lectrosonics M130, M140 and the HM142V and HM152V headset models. Insert the microphone cord plug
into the jack and
rotate it clockwise to lock it . It is important that the plug be securely locked, since the
microphone cord serves as the antenna for the transmitter.
The POWER ON/OFF switch turns the power on and off. The switch should be left in the off position when
the transmitter is not in use. When the switch is in the on position, the battery will be drained even though
the transmitter is not being used.
The BATTERY INDICATOR LAMP will light when the transmitter is turned on and will stay lit as long as
the battery is good. As the battery voltage drops, the lamp will grow dim and finally go out.
The MIC LEVEL is a recessed screwdriver adjustment used to match the gain of the transmitter to different
microphones, individual voices or other audio inputs such as tape deck outputs.
The AUDIO MUTE SWITCH (M175-LS only) is a toggle type on-off switch used to shut off the audio signal
without shutting off the RF carrier of the transmitter.
LECTROSONICS
OFF
ON
+
M175
PWR
MIC
LEVEL
MIC
LECTROSONICS
OFF
ON
+
M175-LS
AUDIO
OFF
PWR
MIC
LEVEL
MIC
Audio Switch
Battery Indicator Lamp
Power ON/OFF Switch
Mic Level Adjust
Microphone Jack
Belt Clip
M175 Series
6