Datasheet

Program Description
3-27
Operation
3.5.4.7 Handset Section
Similar to the headset section, the handset section is used mainly to set up the
handset input gain through the handset PGA or the AGC, selectable by the
Handset Input AGC ON checkbox.
By default, when the handset AGC is OFF, and the programmable gain
amplifier (PGA) is selected for the input gain control, allowing analog input gain
control from 0 dB to 59.5 dB. Under the case (AGC OFF), moving the volume
slide on the AGC OFF subsection adjusts the PGA on the MICIN_HND path
and checking the Mute box mutes the handset input signal.
The handset and headset share the soft-stepping settings. Refer to the
explanation in the Headset Section for the feature and settings.
Similar to the headset, when the box by AGC ON is checked, the handset AGC
is enabled, as shown in Figure 3−14. Refer to the TSC 2101 data sheet for
setting and using the AGC.
Figure 3−14. Audio 2 Screen With Handset AGC On
In addition to the handset input gain control, the handset microphone bias can
be selected inside the Handset Section, similar to that in the Headset Section.