Microphone Technology 665
The microphone elements are fi tted with clips for attachment to the user’s clothing.
Occasionally, the microphone element may be part of a head microphone boom structure.
Typical transmitter features are:
- Power on–off switch.
- Carrier frequency selection and indicator.
- Battery level indicator.
- Audio gain control.
- Audio overload indicator.
- Audio mute switch on body pack units.
- Nine-volt battery.
Receiver units may be stand-alone or rack mounted and are usually powered from
conventional power mains. Audio outputs are provided at both line and microphone levels.
A typical space diversity receiver providing assisted setup has the following features:
- Power on–off switch.
- Scan or operate control.
- Carrier frequency indicator.
- Squelch control.
- Active receive antenna indicator.
- Radio frequency level indicator.
- Transmitted audio level indicator.
- Transmitter battery life indicator.
- Audio output level control.
A photograph of a space diversity wireless microphone system is presented in
Figure 22.13.