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 Superseded Technical Information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 Appendices
7.7.9 Duplicated base station
Spectra engineering has current plans for the development of an Automatic
Changeover Units to facilitate duplicated base station operation.
This option is not currently available. Due to ongoing development please refer to www.spectraeng.com.au
for the latest information regarding this option.
7.7.10 Power Save base station
For solar powered sites and other power critical applications the MX800 is
capable of a Power Save (Low Standby Current) Mode. This option can be
implemented in three stages. Stage one implementation replaces the micro
controller linear voltage regulators with switching regulators. Response times
are unaffected. Stage two involves removing power from the exciter when the
radio is in standby mode. In this case RX responses times are unaffected. In
stage three the RX power is cycled on and off at a user selectable duty cycle.
Essentially the choice of mode of operation involves a compromise between
response time and average current consumption. Current consumption of
250mA is achievable with a typical response time in the order of 1sec.
7.7.11 Tone key base station
T19/T26 is a new Spectra Engineering development, which incorporates a
number of features and functions, of which are covered in Error! Reference
source not found.
7.7.12 Voting base station
As noted in section 3.15 the MX800 with option T19 can provide a Variable
tone encoder. This encoder is compatible with a commonly used Variable
tone-voting arbitrator.
MX800 can also be used with a SINAD voting arbitrator. Mute status of the
receiver can optionally be signalled to the voting arbitrator via tone or
through DC key E & M signalling.
Spectra engineering has current plans to implement the base station
component of a race voting system using a Central arbiter.
7.7.13 Simulcast base station
Precise control of transmitter RF frequency is essential in simulcasts systems.
Option T12 provides an external TX reference oscillator input for injection of
highly stable oscillator. Almost any frequency may be injected.
In addition, each transmitter channel frequency can be offset individually by
small amounts if the internal reference frequency is used. The 1PPM
frequency Stability option is specified for a minimum of 8PPM adjustment.
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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