Installation guide

Williams Sound
®
Helping People Hear
5
Step 5 Set the Audio Select DIP Switches
Set the Audio Select switch for the type of source you’re using.
If you have used the audio cable provided with the PPA 250, there is no need to change
the factory set configuration.
If you have used a different type of cable, see the T4’s top panel and pages 10 and 13 for the
appropriate switch configurations and plug wiring diagrams. See page 15 for Compress vs.
Limit adjustments.
Step 6 Connect the Power Supply
Plug the T4’s transformer into a standard 120 VAC outlet and connect the attached cable to
the transmitter. The cable connector has a retaining catch which must be installed toward the
top of the transmitter as illustrated on the T4’s back panel. The T4 will not operate if you
install the cable upside down, though no damage will result.
Neither the T4, nor its power supply, are equipped with a power switch. Because there is no
“wear out” mechanism and power consumption is minimal, continuous operation is not a
problem.
Step 7 Adjust the Audio Input Control
Play a compact disc or other good audio source through the complete sound system at a level
that is typical of normal operation.
Adjust the Audio Input control so that the Level Indicator
0 dB LED generally lights and the
+6 dB LED lights occasionally.
Step 8 Listen with the Receiver
Install the batteries, plug in the earphone, and walk around the listening area. The signal
should be clear and quite loud when the volume is turned up. See page 17 for performance
checks.
For more detailed installation procedures, see page 11. For more detailed system description,
see page 8.