Adjusting the Squelch
The
Mute level/RF Squelch (11)
controls the mute circuits in the receiver. The control should be
adjusted Counterclockwise to the minimum RF squelch setting at which the
RF LED Indicators
(5)
remains on and The
RF/AF LCD INDICATOR (6)
will display full bars on the
LCD DISPLAY (7)
while your transmitter is in normal use, up to the maximum operating range anticipated in use
for your application. However, in areas of high RF activity, the squelch control may need to be
adjusted Clockwise. If the transmitter is off and the receiver
RF LED Indicators (5)
or
RF/AF LCD
INDICATOR (6)
flickers or stays on continuously, the squelch should be adjusted clockwise to
a higher mute level to stop the flickering. Be careful not to select too high a clockwise setting
as this may reduce the operating range to below what is needed. A range walk test will help in
selecting the proper level. If the range is not critical, note that a clockwise (maximum squelch)
setting will also yield a quieter mute function, which might be desired in certain applications.
The squelch level is factory preset at counterclockwise for maximum sensitivity and operating
range (i.e. counterclockwise for minimum squelch level — maximum usable range).
Note: For easier intuitive operation, the MIN
and MAX indications for this control refer to the minimum and maximum operating range settings,
not to the actual mute levels selected, which are the opposite as per above.
RF/AF LCD, RF LED Indicators
The U-1100/2100 receiver has a
RF LCD indicator (6)
if full bars, indicating strong incoming RF
signal to the receiver. When the RF signal is weaker, it displays fewer bars or no bars when the
TX is off or no reception at all. While the
RF LED INDICATOR (5)
display the antenna A or B RF
present status. The
AF LCD Indicator (6)
displays the bar graph level according to the audio level
from the transmitter. Occasionally the AF LCD Indicator has full bars (peak level) on loud inputs
to the transmitter. This is normal. If the AF LCD has full bars continuously, decrease the input
audio level to the transmitter or overload distortion may result.
Selecting the Receiver Channel
See RF Interference and Finding Open Channels in the
Cautions and Troubleshooting section.
This section will also aid in finding desired channel(s) of operation when setting up your
system(s).
The
UP/DOWN/SET BUTTONS (3)
function as follow for selecting a clear channel:
Press the
UP BUTTON (3)
for 1 second to scan for a clear channel. A running circle in a clockwise
direction on the display shows the scanning process which normally takes about 10 seconds
to complete. When it finds an interference-free channel, it will stop and store the channel for
use. Press the
DOWN/SET BUTTON (3)
for 1 second for SYNC the RX with TX. A running bar left
to right direction on the display shows the IR process which normally takes about 10 seconds
to complete. Position the transmitter
IR RECEPTOR SENSOR (16/28)
6-12” away from the receiver
IR WINDOW (4)
, the
TX LCD DISPLAY (17, 27)
backlighted lit up and the
RF LED/LCD (5, 6)
on the
receiver responses in second. If the IR data download is successful, the receiver RF LED/LCD
lights up which indicating the transmitter is linked and the receiver is excepting reception it. If
linking failed, the RF LED/LCD will not light up at all and you should do the IR sync again.
If manual Preset Channel selection is preferred, press the
UP or DOWN BUTTONS (3)
for 3
seconds to enter the channel selection menu for manually picking a desired channel. Each
following press of the UP or DOWN BUTTONS will single step the channel from 1 of 100 pre-
programmed channels or hold down continuously for faster selection. Release the button
and wait for the LCD display to stop flashing to confirm the selection has been stored into the
memory.
If you miss the channel number desired, keep pressing the UP or DOWN BUTTONS until you
reach it. This completes the manual channel programming.
Note: If no button is pressed within 5 seconds, the programmed content is stored for use.
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