User's Manual
Table Of Contents
- 1. General Description
- 2. Installation and Operation
- 3. Options
- 3.1 T01 Programmable Channel Spacing
- 3.2 T02 Programmable CTCSS encoder/decoder
- 3.3 T03 Programmable DCS/CTCSS encoder/decoder
- 3.4 T05 Balanced and Isolated VF plus E&M
- 3.5 T06 Simplex Changeover Relay
- 3.6 T08 VF Delay
- 3.7 T09 300Hz Upgrade HPF Filter
- 3.8 T10 Power Save Mode
- 3.9 T11 Combined Options
- 3.10 T12 External Reference Oscillator Input
- 3.11 T13 Local Speaker, Mic Socket and Front Panel Mute
- 3.12 T14 Local Channel Change
- 3.13 T16 1PPM Frequency Stability
- 3.14 U69 Extended Temperature Range Verification
- 3.15 T19/26 Line Interface Board.
- 3.16 T29 Balanced and Isolated VF plus E&M
- 3.17 T31 Network Adapter
- 3.18 T34 Ethernet option
- 3.19 T36 Option - TX Ref Oscillator input and Modulator
- 6. MX800 Base Station Fault Finding Procedure
- 7. Appendices
- 7.1 MX800 Interface Connections
- 7.2 CN2 DB9 Female Monitor Connector
- 7.3 CN3 DB25 Female Digital I/O Connector
- 7.4 MX800 Specifications
- 7.5 Channel Select DIP Switch Settings
- 7.6 MX800 Model Number Configuration Guide
- 7.7 MX800 System Applications
- 7.7.1 Conventional base station/repeater
- 7.7.2 Link transceiver
- 7.7.3 Data transceiver
- 7.7.4 Paging transmitter
- 7.7.5 Trunking Base Station
- 7.7.6 Systems base
- 7.7.7 Repeater with Morse ID
- 7.7.8 Simplex base station
- 7.7.9 Duplicated base station
- 7.7.10 Power Save base station
- 7.7.11 Tone key base station
- 7.7.12 Voting base station
- 7.7.13 Simulcast base station
- 8. Superseded Technical Information
- 9. Drawings
Technical Manual Options
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
41
3.11 T13 Local Speaker, Mic Socket and Front
Panel Mute
3.11.1 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 3-7 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
Speake
Push-wheel
Channel Change
r
Volume
Control
RJ45
Microphone
Socket
Squelch
A
djust Hole
Line O/P
A
djust Hole