User's Manual

M7X and M7R Page 4-16 Installation
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Control Head Interfaces
The Control Head has two interfaces (Fig 4-11): a Microphone/Headset/Maintenance connector and a
Fill connector.
Fig 4-11 Location of Microphone/Headset/Maintenance and Fill Connectors
Microphone/Headset/Maintenance Connector
This is a Lemo 10-way socket used for connecting a microphone, headset or maintenance computer. The
connector’s pin-out is listed in Table 4-6 and the pin arrangement shown in Fig 4-12.
Microphone/Headset/
Maintenance Connector
Fill Connector
To avoid interference from the USB system when using the audio functions on this
connector, the USB interface can be disabled from the front panel. This is achieved by
setting USB Interface to OFF in the Radio Config Settings. See Configuring the Radio in
the Operation topic.
When connecting a microphone, the appropriate microphone settings (passive/active and
low/high sensitivity) must be selected in the Radio Config Settings. See Configuring the
Radio in the Operation topic.
Hearing loss can result when listening to audio at excessively high levels, or for prolonged
periods of time. Always set the volume control to a safe (low) level before using
headphones.