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OPERATING INSTRUCTIONS
UB-16 Bodypack Transmitter
14
b. Microphone Use (with either a lavalier or headworn microphone)
Secure the connection from the LAVALIER (33) or HEADWORN MIC (34) cord 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, verify that the INPUT SELECTOR SWITCH (23) is in either the HM position (for a
connected headworn mic) or the LT position (for a lavalier mic) and slide the OFF/STANDBY/ON SWITCH
(28) to the ON position. Adjust the volume of the receiver as per the Audio Output Microphone
Connection section of the preceeding UHF-16 receiver instructions. For optimum performance, an INPUT
LEVEL CONTROL (26) is provided. Adjust the gain by turning the control with the supplied small slotted
screwdriver. For lavalier mic use, it is recommended that the level be set at about 2/3 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 is not recommended.)
9. Cautions
a. Feedback
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. Omnidirectional 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.
b. Microphone Damage
The headset or lavalier microphone element can easily be destroyed by the buildup of salts and minerals
from perspiration and saliva. It is good practice to put a windscreen on the mic element at all times to
protect it.
c. No Audio
If the receiver is configured for Tone Squelch™ mute, the transmitter must also be configured to send the
tones, otherwise the receiver audio will remain muted. See preceding Mute Adjustment section, page 8.