Specifications

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Audio Perfect
TM
10 Installation and Operations Manual Page 9
Calibration
The following information will help you make adjustments to optimize your system
performance. Verify all components and all connections. Ensure that proper power
is supplied to the AP10 and that the unit is OFF (the red OFF LED [4] will be lit;
Figure 12, below). If the green ON LED [3] is lit, press the OFF button [6].
CALIBRATION NOTE:
Some echo and ringing may be heard while calibrating the AP10. Disregard it and
continue with calibration until the end of the procedure. The echo and ringing will
disappear.
There are two calibration methods for the AP10: noise burst and auto-adapt. Which
procedure is used depends on whether you have dip switch 1 ON (UP) for noise-burst
adapt, or dip switch 1 OFF (DOWN) for auto-adapt. Either will suffice to calibrate
the AP10. The difference is the application and/or personal preference. Some
applications are not suited for a .75-second noise burst, and may require the gradual
adaptation over time.
Noise-Burst Adapt
If dip switch 1 is ON (UP), have someone call the AP10 from another location.
Answer the line by pressing the ON button [5]. (If the auto-answer feature is
active, the unit will answer the call after one complete ring.)
The caller will hear a short white noise burst (it will sound like static) and a short
beep. This automatically adapts the AP10 to the telephone line.
Auto-Adapt
If dip switch 1 is OFF (DOWN), call someone and continue to talk while the
system gradually adapts over time. Once complete, the AP10 will be fully
calibrated and ready for use.
Conclude your conversation and press the OFF button [6]. (If the auto-disconnect
feature is active, and the distant location hangs up, the AP10 will disconnect
upon sensing loop drop or call-progress tones, depending on the position of dip
switch 6.)
Transmit Level Adjustment
AP10 NOTE:
AP10 transmit and receive audio level adjustments are made via the AP800. Nominal
transmit and receive level for the AP10 is 0dB.
Someone in the local room should speak into the microphone at a normal distance,
in a normal voice. The party at the distant location should not speak during the
transmit adjustment. Adjust the AP800 output that is connected to the AP10
TRANSMIT INPUT to 0dB. The AP10 TRANSMIT LED [1] should be solid
green while the person is speaking and extinguish when the person stops.
Figure 12. AP10 front-panel controls
5
6
1
3
2 4
Transmit
Receive
On
Off