ClearOne XAP TH2 - Manual (Page 27)

23 Optimization ~ Telco Meters
Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
Using meters
Open the XAP TH2 Telco Meters window by clicking the Telco Meters button on the
XAP TH2 Flow Screen. The Telco Meters window is a diagnostic tool which allows
you to observe the performance of various aspects of XAP TH2 operation. Refer to
the Transmit and Receive meters when making level adjustments.
Telco Echo Return Loss (TERL)
The Telco Echo Return Loss meter shows the coupling between the transmit signal
and the input to the telephone echo canceller. It is the ratio of the two levels. The
range of the meter is -30 to +20dB. It is a peak meter and updates only when
transmit signal is present.
Telco Echo Return Loss Enhancement (TERLE)
The Telco Echo Return Loss Enhancement meter shows the loss through the
telephone echo cancellation and non-linear processing chain. It is the ratio of the two
Figure 5.1. XAP TH2 Telco Meters window
Telco Meters