MX800 Transceiver Technical Manual
© SPECTRA ENGINEERING 2006 Revision 4.2.3
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6. Set the test set to measure Rx parameters and ensure that the Receiver is
operating correctly.
7. Replace the MX800 cover.
3.13 T13 Local Speaker, Mic Socket and Front
Panel Mute
3.13.1 Description
For applications needing a user interface at the base station the MX800 is
available with the Local Control option. The full implementation is described
in section 1.1.1.2 this section describes the part fitted under option T13.
Figure 3-8 Front Panel with Speaker, Mic and Mute
Loudspeaker and Volume Control
A 1 Watt loudspeaker is provided to monitor 'on air' received audio as well as
transmit audio from line. Volume control is provided by means of a volume
pot or a 3-position toggle switch adjacent to the loudspeaker. This switch is
biased in the centre position. To raise or lower the volume the switch is
momentarily moved up or down respectively. For each switch closure the
volume is incremented or decremented a fixed amount.
The speaker has a link selectable connection to a tone output from the micro
controller. This may be used in conjunction with the appropriate software
configuration to generate an alert tone to the user.
Microphone Socket
An RJ45 socket is provided for connection of a microphone. This socket is
wired compatibly with the Motorola GM300 microphone.
Mute / Squelch Adjustment
Provision is made to optionally locate the squelch control potentiometer
behind the front panel. A screwdriver hole is provided in the front panel to
access this adjustment.
RS232 Port
Line I/P Adjust Hole
Push-wheel
Channel Change
Volume
Control
RJ45
Microphone
Socket
Squelch
Line O/P
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