UB-4 BODYPACK TRANSMITTER
The UB-4 is equipped with two
INPUT SELECTOR SWITCHES (27)
cover on the circuit board for selecting the type of audio input you will be supplying
to the transmitter. Select from the choice of three positions: INSTRUMENT (for guitar,
bass, etc.)/ HEADWORN MIC/ LAVALIER MIC. (G/H/L).
There are two switches, one with selectable position G, H, L and the other with G, HL.
To select inputs: (see chart on page 10)
A. Instrument — both switches to “G”
B. Headworn Mic — set one switch to “HL” and the other to “H”
C. Lavalier Mic — set one switch to “HL” and the other to “L”
Transmitter OperationTransmitter
To turn transmitter on, slide the
to the STANDBY position fi rst
(transmitter on, audio muted) or the ON position (transmitter and audio both on). The
will give a single fl ash, indicating usable battery strength. In case of dead or low battery,
the LOW BAT LED will either not go on at all or will stay on continuously. During use, if the LOW
BAT LED stays on continuously, it is indicating that the battery should be replaced with a fresh one.
To preserve battery life, turn the transmitter off when not in use.
Receiver Volume Controls Adjust
The volume controls adjust only the 1⁄4” sum output. Turn
24 receiver clockwise to near full gain. Adjust Volume up or down so that no audio distortion is pres-
ent when amplifi er or mixer is set at their usual levels. At full gain, the system gain is approximately
+20dB (+4dB for GT) higher than a direct line-to-amp connection. If the fi xed level
are used, the volume level of each receiver should be adjusted by the mixer to which the UHF-
24 receiver is connected.
For optimum performance, an
for LT/HM is provided. Adjust the
microphone gain by inserting a small slot-headed screwdriver to the adjustment knob, located on
the topside of the transmitter unit, next to the mic input jack. Factory setting is 1⁄2 full. This is a set-
ting 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 pos-
sible 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-
The transmitter is now ready to use. The CH. A or B LED indicator on 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 per in the receiver operating instruc-
• The transmitter has an external fl exible wire antenna. For proper operation, it should not be cover
or touch during operation.
• Observe care in selecting P.A. volume, transmitter location and speaker placement so that acous-
tic feedback (howling or screeching) will be avoided.
UH-4 HANDHELD TRANSMITTER
The UB-4 transmitter requires a single 9V battery to operate. To open the battery compartment,
fresh 9V battery according to the correct polarity as indicated on the transmitter body. Snap the
cover back onto the bodypack. Make sure the cover is secured completely. Fresh alkaline batteries
can last up to 10 hour of operation, but in order to ensure optimum performance, it is recommended
that the batteries should be replaced after 6-8 hours of use.
Input Connection and Input Selector Switches
The UB-4 is provided with a
for connecting the audio input selected.
as desired, according to the input selected.
(Note: Use only the input audio source as per the
input selected with the input audio Input Selector Switch or the audio will not be optimal- a muddy
or distorted sound may result.)
To secure the connection, turn the slip ring on the plug clockwise ti
thread it on the jack. To unplug, reverse the process. Slip the transmitter into a pocket or clip it onto
you cloth or instrument strap (if using the UB-4 as an instrument transmitter.)
UB-4 BODYPACK TRANSMITTER
