Nady Systems U-41 QUAD Owner's manual - page 7
7
UH-4 HANDHELD TRANSMITTER
Transmitters set up
The UH-4 transmitter requires a single 9V battery to operate. To open the battery compartment,
unscrew and remove the
BATTERY COVER (16)
, exposing the
BATTERY HOLDER (17)
. Insert a
fresh 9V battery according to the correct polarity as indicated on the transmitter body. Screw cover
back onto the microphone. Make sure the cover is screwed on completely. Fresh alkaline batteries
can last for up to 10 hours of operation, but in order to ensure optimum performance, it is recom-
mended that the batteries should be replaced after 6-8 hours of use.
Microphone Operation
To turn transmitter on, slide the
OFF/STANDBY/ON SWITCH (18)
to the STANDBY position first
(transmitter on, audio muted) or the ON position (transmitter and audio both on). The
LOW BAT
LED (19)
will give a single flash, indicating usable battery strength. In case of dead or low battery,
the LED will either not go on at all or will stay on continuously. If the
LOW BAT LED (19)
stays on
continuously during use, it is indicating that the battery should be replaced with a fresh one as soon
as possible. To preserve battery life, turn the transmitter off when not in use.
Receiver Volume Controls Adjust
The volume controls work only for the 1⁄4” sum output (MIX). Turn the corresponding
VOLUME
CONTROLS (5)
on the U-41 QUAD UHF receiver being used clockwise to near full gain. Adjust
Volume up or down so that no audio distortion is present when amplifier or mixer is set at their
usual levels. At full gain, the system gain is approximately 4dB higher than a direct line to amp con-
nection.
If the fixed level XLR outputs are used, the volume level of each receiver should be adjusted by the
mixer to which the U-41 QUAD UHF receiver is connected.
Level Trim Adjust
For optimum performance, an
INPUT LEVEL CONTROL (20)
is provided for the transmitter. Adjust
the microphone gain by inserting a small slot-headed screwdriver through the adjustment hole,
located on the topside of the battery compartment, under the compartment cover. Factory setting
is 1⁄2 full. This is a setting to be used in most typical close microphone applications. Depending on
the average distance between vocalist’s mouth and microphone, you can adjust the level for your
application. Set for maximum possible gain and headroom without noticeable distortion of the high
level peaks. It is recommended that the level be set at about 1⁄2 maximum. 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 recom-
mended.)
The microphone is now ready to use. The
TX ON LED (7)
on the corresponding receiver should
now be on, indicating a received signal from the transmitter. When ready to speak, slide the switch
to the ON position. Adjust the volume of the receiver as outlined in the Receiver Operating Instruc-
tions: Connecting Audio Outputs.
Note:
• The battery compartment on the UH-4 functions as a built-in antenna. For proper operation, it
should not be covered by the hand or touched during operation.
• Observe care in selecting PA volume, transmitter location and speaker placement so that acoustic
feedback (howling or screeching) will be avoided.
10
UB-4 BODYPACK TRANSMITTER
28
29
30
23
27
26
Opening Battery Compartment
22
21
25
24
INPUT SELECTOR
SWITCHES
Instrument
HL
G G H L
Headworn
HL
G G H L
Lavalier
HL
G G H L