User's Manual

16
Receiver/Transmitter ASC™ IR Sync Manual Programming
To manually program the pre-selected Group/Channel (frequency) from the receiver
to the transmitter, place the transmitter’s IR RECEPTOR SENSOR WINDOW (37,
44) 6-12” away from the receiver’s IR WINDOW (4). Press the MENU BUTTON
(18) four times to the IR Screen Display and then press the UP BUTTON (16) to
start IR programming. The flashing IR INDICATOR (10) icon indicates IR transmission
is in progress. When the synchronization is completed successfully (usually in
less than 2 seconds), the RF INDICATOR (8) and the diversity A or B INDICATOR
(9) on the receiver will display, indicating that the IR linking is completed. The
LCD DISPLAY SCREEN (5) will show the selected channel. If the UP button is not
pressed during the two seconds of active data transfer, the IR INDICATOR (10) will
not flash, the LCD Display will revert to the main menu, the receiver will not link to the
transmitter, and the transmitter’s previously programmed channel remains unchanged.
Instructions for Setup of Simultaneous Multichannel Operation
This U-800 receiver is capable of finding an open channel with its autoscan capability.
This built-in feature is a quick, convenient way to set up many wireless systems at
the same location for simultaneous multichannel operation.
If you are using multiple transmitters at the same location, set up the first transmitter and
leave it ON and keep 10 feet away from the receivers and 1 foot away from transmitter
to transmitter. This avoids possible duplicate selection of the same channel as already se-
lected for the first receiver. Then start the autoscan function on the second receiver. Repeat
this procedure for all receiver/transmitters to be used in your system. Finally with all the
transmitters ON, perform a range walk test in the location these systems will be used in to
check for potential crosstalk interference in this application.
If you are not satisfied with any of the channels scanned, repeat the autoscan procedure
for that receiver again anytime for finding another free channel.
This process can be simplified if you select channels within Factory SELECTED Groups
11 to1A, as the channels within those groups are mutually compatible (unless there is
outside interference on any of the selected frequencies). If there is any such interference in
your location, select as many channels as you can using these 10 groups and
then select additional open channels as needed (depending on number of systems to
be operated simultaneously) from Groups 1B to 1F. As noted above all these groups
will retain in memory the previously selected channels for that group for easy setup
subsequently in that same location.
9
Powering the Receiver
Plug the AC/DC ADAPTER (23) provided into the DC INPUT JACK (20)
on the back of the receiver. Then plug the power supply into an AC outlet. (Note:
Any 22V DC source with 400mA capability can also be used.) Press the POWER
SWITCH (1) once to turn on the receiver. The POWER ON LED (2) and the LCD
DISPLAY (5) will now light and the receiver is operational.
Adjusting Antennas
The U-800 has two permanently attached, flexible-elbow ANTENNAS (3) for diver-
sityreception. Unfold and rotate these antennas to operate the receiver. The optimal
positions of the antennas are flared 45° out from the receiver sides and 90° from each
other. For maximum range, it is always best to maintain a line-of-sight (no obstructions)
between the receiver antennas and the transmitter at all times whenever possible.
Adjusting the Mute Level/ RF Squelch
The MUTE LEVEL/RF SQUELCH (13) can be changed anytime during the main
screen display to quiet the receiver in high noise environment condition. The control
ranges are from level 0 to level 5. The level should be adjusted to a lower number
for the minimum RF squelch setting at which the RF INDICATOR (8) will remain on
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 to a higher number. If the transmitter is off and the
receiver’s signal RF INDICATOR (8) or the diversity A or B INDICATOR (9) flickers
or stays on continuously, the squelch should be adjusted to a higher number to stop
the flickering. Be careful not to select too high a number 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 higher level (maximum
squelch) setting will also yield a quieter mute function, which might be desired in
certain applications. The squelch level is factory preset at maximum sensitivity and
operating range (i.e. level 0 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.
Keyboard/Buttons Lock Function
Use keyboard/Buttons Lock Function to lock or unlock the receiver controls, preventing
accidental adjustment during use: You can push and hold MENU BUTTON (18),
then push UP BUTTON (16) to lock; push and hold MENU BUTTON (18), then
push UP BUTTON (16) again to unlock. The Keyboard/Buttons must be unlocked
before you can make a selection: AUTO SCAN, Group/Channel or MUTE levels.