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 Superseded Technical Information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
Test Equipment Required:
1. Communications Test Set
2. Jumper link
Installation Method – MX800 Chassis:
1. Remove the cover to the MX800 radio.
2. Remove the motherboard from the chassis.
3. Remove the Exciter and receiver modules from the chassis by unscrewing
the 2 M4x35mm screws on each module.
4. Remove the front panel from the chassis by unscrewing the qty4 screws
securing the handles to the front panel – Do not discard the screws.
5. Place the loudspeaker in the speaker indentation on the front of the
chassis. The speaker wires should be in the upper most position.
6. Place the front panel on the front of the chassis to hold the speaker in
position and secure the front panel with the matching handles and the
previously removed screws. Ensure that the front panel holes are aligned
with the corresponding chassis holes and fully tightened handle screws.
7. Re-install the exciter and receiver modules into the chassis.
8. Re-install the motherboard (after it has been modified for this option) into
the chassis being careful to align the front panel hole positions with the
corresponding motherboard components.
9. Re-connect all of the modules and chassis mounted connectors to the
motherboard via their appropriate cable assembly’s.
Installation Method Motherboard:
1. Install the MCP6002 IC’s onto circuit board designations IC61, IC62 &
IC64.
2. Install the TDA8551 IC onto circuit board designations IC60.
3. Remove the SMB potentiometer located on circuit board designation
RV6 and re-install it onto board reference RV10.
4. Install the 100kohm SMB potentiometer onto circuit board designation
RV11.
5. Install the 100kohm PCB potentiometer onto circuit board designation
RV6B (Mute).
6. Install and solder the RJ45 connector into the SKL (MIC) position on the
motherboard board.
7. Install and solder the 16mm Volume Pot (RV9) or SPDT switch into the
SW1 (VOL) position on the motherboard board.
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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