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 Superseded Technical Information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 General Description
1.2.4 Micro Controller Board
The Micro Controller Board is physically located behind the rear panel
connectors and all signal connections (apart from the RF connections)
external to the transceiver are made via the controller card. User settable
jumpers and DIP switches are located on the card as are level adjustment
potentiometers.
The Micro Controller controls the operation of the RF modules and acts as
the interface between the user connections, indicators and the RF modules. It
processes transmit and received audio to and from the Exciter and Receiver
modules as well as providing the digital I/O functions of the transceiver.
The circuit board has an onboard EEROM in which is stored all of the user
channel related data such as frequencies, CTCSS tones etc. A serial port at
the rear (or optionally the front) of the MX800 provides access to the
Controller card and in conjunction with the Spectra Engineering
"MXTOOLS" programming utility allows the user to create and change this
channel related information.
Special functions capable of being carried out by this card include non-
predictive full duplex CTCSS encoding/decoding, DCS encoding/decoding as
well as FFSK and 4-level FSK modems. Digipots under the control of the
processor ensure that user set up levels for TX deviation and power levels are
correctly set for each channel.
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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