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 Superseded Technical Information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
MX800 Transceiver Appendices
Take care if too much offset is used as this may effect the modulation
symmetry. The use of this feature and a low frequency carrier dithering has
proven to eliminate the previous requirements of extremely high stability
reference frequency inputs.
The MX800 has been widely installed for the use in simulcast systems. These
DSP based systems provide automatic compensation for changes in
modulation delay characteristics.
The T36 Option extends the modulation capabilities of the MX800 when an
externally locked reference input signal is required. In Simulcast systems
where the application does not just require just Voice modulation but also the
additional capability of either Data, POCSAG, CTCSS or DCS, then a
transmitter is required to have a modulation bandwidth that extends to down
towards 5Hz or better still to DC (0Hz). This new option provides that
capability by incorporating digital RF techniques. In addition, the carrier can
be offset in each transmitter in steps of 1Hz.
Drawing No. Description
SC001-1A MX800 Conventional Systems Examples
SC001-2A MX800 Conventional Systems Examples
SC003-1A MX800 T19/T26 option Board Example
SC004-1A MX800 Paging Configuration Example
SC006-1A MX800 Link System Configuration Example
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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