Tendzone TYCHO T 1212/CA - Manual (Page 30)

2.2.1Input source
Figure 25
The sensitivity of MIC input and line input can be selected. High sensitivity indicates high acoustic-electric conversion
efficiency of the MIC, and sensitive reflection of weak voice signal;
Allow call: allow the access of panel signal to the channel. Down indicates access, and up indicates access is not allowed.
- Telephone input: allow the access of the phone module signal to the channel. Down indicates access, and up indicates
access is not allowed.
- Mute: down indicates the channel enables mute, i.e. the input signal is shielded, and up indicates the channel signal is
not mute.
- Test signals: including sine, pink and white noise. The parameters of the signal generator can be adjusted when pressed,
the signal of the signal generator access the channel, and other input signals are no longer output;
- Phantom power: MIC input is provided with phantom power, for condenser microphone. It shall not be turned on in
case of line input or non-condenser microphone, so as to prevent overburning;