10
WIR TX75 C/D Infrared Transmitter
Adjusting the Audio Level
Line Level Source
After an audio signal has been connected to the transmitter, adjust the audio source gain until the WIR TX75 C/D PRO audio-level
indicator for that channel blinks periodically.
Microphone Source
Speak into the microphone from a normal distance and at a natural voice level. Use the microphone gain adjustment on the WIR
TX75 C/D PRO to set the gain to the point where the audio level indicator on the selected channel blinks periodically. If the audio
level indicator is always on or on most of the time, the level is too high. If the audio level indicator is never on, the level is too low.
Connecting Master and Slave Units
Connect all WIR TX75 C/D PRO master and WIR TX75 S slave(s) units together using CAT-5e cables, the “to slave” jacks on the
master, and the “Master In” jack on the slave(s). For systems with no slave units, the CAT-5e cables and “to slave” jacks are not
used. For systems with one slave unit, either “out 1” or “out 2” may be used. When powering the master unit with POE, connect the
POE source to either jack, and connect the remaining jack to the slave unit.
The WIR TX75 C/D PRO automatically detect when slave units are plugged in, establishes a data link to verify operation, monitors
status, and enables baseband output to the slave emitter(s).
When a cable is plugged into a “to slave” jack, the master unit will automatically detect mis-wired, intermittent or bad CAT-5e
cables; a yellow status indicator light will blink on that channel’s “to slave” jack to indicate any problem. See WIR TX75 C/D PRO
Indicators table on page 12 for instructions on how to read indicator lights.
Once a master and slave unit are connected, the yellow and green indicators located on the “to slave” and “Master In” jacks mimic
each other. This allows the user to know the status of the entire system by simply looking at the indicators on the back of the
master unit. A switch is provided to turn off all indicator lights AFTER initial set-up, to allow for less conspicuous operation.
Note: The WIR TX75 C/D PRO will automatically detect and adjust for differences in CAT-5e cable length to the slaves.
Matching cable lengths to the slaves is not necessary� Cable length up to 100 feet may be used to connect the slaves or POE�
Figure 9: Connecting a WIR TX75 C/D PRO master transmitter to two WIR TX75 S slave emitters
TO SLAVE ONLY
DC POWER
MIC
CAT5E
WIR TX75 C/D PRO “MASTER”
WIR TX75 S SLAVE #1
(OPTIONAL)
AUDIO
SOURCE
MICROPHONE
(ELECTRET)
FROM AC
POWER SOURCE
WIR TX75 S SLAVE #2
(OPTIONAL)
A508
POE POWER
(EITHER SLAVE JACK)
FROM AC
POWER
SOURCE
STANDARD
POWER SUPPLY
POE
POWER
SUPPLY
PHOENIX
