Lectrosonics UT700 User Manual download pdf (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

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Lectrosonics UT700 User Manual Page 29