Nady Systems OCTAVO U-81 Owner's Manual - page 8
UB-81 BODYPACK MIC TRANSMITTER
• Adjust the volume of the receiver as per the Connecting Audio Outputs, section 6 of
the U-81 OCTAVO receiver instructions above. [Note: Observe care in selecting P.A.
volume, transmitter location and speaker placement so that acoustic feedback (howling
and screeching) will be avoided. Please also note the pickup pattern characteristics
of the microphone selected. Omni directional mics pick up sound equally from all
directions, and are prone to feedback if not used carefully. Unidirectional mics are more
resistant to feedback, but pick up sound sources best that are directly in front of the
mic. Also, mics that are farther from the sound source, such as lavaliers, require more
acoustic gain and thus are also more prone to feedback than close-source mics such
as handheld or headworn models that are used close to the mouth].
9. Microphone Use (with either a lavalier or headworn mic)
• Secure the connection from the
Lavalier (21) or Headworn mic cord (20) by turning
the slip ring on the plug into the transmitter clockwise to thread it on to the jack. To
unplug, reverse the process. To use the lavalier mic, attach it at chest level. Do not
place it too close to the mouth–a distance of about six inches usually works best. To
use the headworn mic, place it on the head and adjust the boom so that the mic is
about one inch to the side of the front of the mouth. When ready to speak, slide the
ON/STDBY/OFF switch (23) to either the “STDBY or ON” position.
• For optimum performance, an
Input level control (25) is provided. Adjust the gain by
turning the control with a small screwdriver. For lavalier mic use, it is recommended
that the level be set at about 1/2 maximum. For headworn mic use, it may be advisable
to turn the gain down somewhat, depending on the volume levels expected. In either
application, experiment and set for maximum possible gain without audible distortion
on the high level peaks.
(Note: Turning down the gain too much can compromise the signal-to-noise and it is not
recommended.)
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