Lectrosonics UT700 User Manual
Page 29
Encrypted Digital Wireless System
Excessive feedback
Transmitter gain (audio level) too high. Check gain adjustment
and/or reduce receiver output level.
Microphone too close to speaker system.
Move microphone closer to the user’s mouth, and lower the
sound system volume.
Microphone has a “whine” noise in
the background which varies as the mic
cable is moved. (UM700 specific)
The 700 Series modulation has an AM component which is more
easily detected than FM by sensitive audio circuits. A microphone
that works fine on an FM system might not work on a 700 series
system. To protect the microphone from RF it is necessary to
bypass it effectively at both ends of the cable. Ensure that bypass
capacitors are installed inside the connector housing. If the mic is
not sufficiently bypassed at the capsule, it may be necessary to use
a different type of microphone. The UM700 transmitter is shipped
with an M150 microphone which should work.
Note: The microphone plug wiring is different for the UM700 transmitter
than for other Lectrosonics models. The M150 microphone supplied
with the UM700 transmitter will not work with Lectrosonics 185/187
Series VHF belt-pack transmitters.
Rio Rancho, NM
29