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 Superseded Technical Information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 Options
Condition Description
Approx Average
Current Drain mA
Standard Standard MX800 (TX VCO on continuously) 525
Standard Standard MX800 (TX VCO switched) 490
Stage 1a Standard MX800 (TX VCO on continuously)
option board fitted
475
Stage 1b Standard MX800 (TX switched) option board
fitted
440
Stage 2 TX exciter inc TX VCO powered down 370
Stage 3
RX 100% duty
TX exciter inc TX VCO powered down
RX module power duty cycled
370
Stage 3
RX 50% duty
TX exciter inc TX VCO powered down
RX module power duty cycled
255*
Stage 3
RX 25% duty
TX exciter inc TX VCO powered down
RX module power duty cycled
198*
*Average current calculation is based on RX off current drain of 140mA and RX on current drain of 370mA.
Table 3-4 Current Consumption Details
This option may be fitted at order placement or retro fitted subsequently. The
Option PCB assembly is fitted above the Micro controller on four hex pillars.
A 16-way ribbon connection is made from the Option PCB to SKK on the
micro controller card. The links on the Option card are set as below. Once the
power save option is fitted the "Power Save Option Board Installed" and
"Power Save Exciter Module" check boxes are ticked in the MXTOOLS
Configuration screen (Hardware settings tab). In addition three timers need to
be set. "Idle Time to Power Save" is entered in seconds and defines how long
the radio will wait following the most recent activity before reverting to
standby mode. "RX Module On Time" and "RX Module OFF Time" define
the duty cycle of the receiver module.
Note that this options Printed Circuit Board is also used for T08, VF Delay
and T09, CTCSS Suppression Upgrade Filter and all three are independent
and may be used separately or together. If the option PCB is ordered for one
particular option it may or may not be populated for the other options. If the
option is being retrofitted the two main 5 Volt 78M05 regulators on the
Microcontroller board must be removed and subsequently replaced if de-
installing.
JMP Function/Description Option Active Option Disabled
JMP 1 Low standby current mode
switched exciter power
Out In
JMP 2 Low standby current mode
switched receiver power
Out In
JMP 3 300Hz Elliptic filter 1-2 2-3
JMP 4 RX audio delay 2-3 1-2
Table 3-5 Option PCB Link Settings
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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