ClearOne comm AP10 operation manual Receive reduction, Calibration, Noise burst adapt, Ringing

Configuration ~ Calibration 13

Receive reduction

In some applications, it might be necessary to duck (lower) the receive audio coming in through the telephone line when transmit audio is present. To enable receive reduction, set DIP switch 7 to the On position.

DIP Switch	Position	Description
7	On (up)	Receive reduction enabled
7*	Off (down)	Receive reduction disabled

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 (indicated by the red Off LED). If the green On LED is lit, press the Off button [E].

AB C

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 might 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 [D]. (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.

	D	E
Figure 3.2. AP10 front-panel controls
Some	echo	and	ringing
✍ might	be	heard	while
calibrating		the	AP10.

Disregard it and continue with calibration until the end of the procedure. The echo and ringing will disappear.

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