UB-81 Bodypack MIC Transmitter

INPUT SELECTOR
SWITCHES
GT HM LT
Instrument
GT HM LT
Headworn	15
	15
GT HM LT	18
Lavalier	18

UH-81 HANDHELD MIC TRANSMITTER

7. UH-81 Transmitter Set Up

•Release the Battery cover (11) by pressing the locking tab and slide down as per ar- row, exposing the Battery holder (12). Insert two fresh AA alkaline or NiMH batteries, observing the correct polarity as marked, and slide the battery cover back on to the mi- crophone. Make sure the cover is closed completely. Fresh alkaline batteries can last up to 10 hours in use, but in order to ensure optimum performance, it is recommended that you replace the battery after every 6-8 hours of use. NiMH batteries should be replaced with fresh ones recharged fully (with separate charger, not supplied, and as per its charging instructions) whenever low or dead battery status is indicated as per the following.

•Turn on the UH-81 by sliding the ON/STDBY/OFF switch (13) to the STANDBY posi- tion ﬁrst (transmitter on, audio muted) or the ON position (transmitter and audio both on). The Battery indicator LED (14) will give a single quick ﬂash, indicating usable battery strength. In the case of dead or low batteries, the LED will either not go on at all or will stay on continuously, indicating that the batteries should be replaced with fresh ones. To preserve battery life, turn the transmitter off when not in use.

•The microphone is now ready to use. The RF Signal LED (7) on the corresponding channel of the U-81 OCTAVO receiver should now be lit, indicating a received signal from the same frequency transmitter. When ready to speak, slide the ON/STDBY/OFF switch (13) to the ON position.

•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 place- ment 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, as provided with the UH-81, 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].