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TM8100/TM8200 Service Manual TMAA10-02 Handset 557

30.2 Radio Programming

Dynamic

Microphone

Support

Dynamic microphone support must be enabled in the UI Preferences form

of the radio’s programming application, so that audio is optomized for

dynamic microphones. Refer to the online help of the programming

application for more information.

Private Handset

Mode

If private handset mode is required, the radio needs to be programmed to

mute the audio power amplifier when the handset is out of the cradle. The

audio path is then only through the RX AUDIO line to the handset earpiece.

The following table shows the settings required in the Programmable I/O

form of the radio’s programming application. Refer to the online help of the

programming application for more information.

Note If private handset mode is programmed, then no audio will be

heard from the speakers if the handset is unplugged.

Figure 30.1 Correct handset microphone grommet seating

microphone

grommet

control head

Table 30.2 Handset settings in the UI Preferences form

(TM8100 Programming Application)

Field Setting Selected/Cleared

Audio Setup Enable Options Board Preamp selected

Table 30.3 Handset settings in the UI Preferences form

(TM8200, TM9000/TP9000 Programming Application)

Field Setting Selected/Cleared

Audio>Audio Setup Dynamic Mic Support selected

Table 30.4 Handset settings in the Programmable I/O form, Digital tab

Pin Direction Label Action Active Debounce Signal State Mirrored To

CH_GPIO1 Input None Force Audio PA Off High 25 None None

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