MX800 Transceiver Technical Manual
© SPECTRA ENGINEERING 2006 Revision 4.2.3
24
Method:
1. Remove the cover to the MX800 radio.
2. Remove the rear connector label from the back panel of the MX800.
3. Punch out the small indented rectangle on the rear LHS of the MX800.
4. Remove the connectors from the Motherboard headers SKE, SKF and
SKH.
5. Carefully locate the T04 or T05 option board into position at the rear
RHS of the radio with the RS232 cable lying underneath the option
board.
6. Secure the option board with the qty3 3x5mm machine screws
7. Install the 10way Monitor cable to SK4 on the option board.
8. Install the 10way cable Assy to SK3 on the option board and to SKE on
the Motherboard.
9. Install the 16way VF cable to SK2 on the option board.
10. Install the 16way cable Assy to SK1 on the option board and to SKH on
the Motherboard.
11. Reconnect the 25way Digital Interface cable to SKF on the Motherboard.
12. Install the rear connector layout label onto the PA heatsink underneath
the RF ‘N-type’ connector.
MX800 Testing
1. Connect a Communications Test Set via the RIB to the MX800 balanced
audio RJ45 connector as per paragraph 3.4 of the MX800 Technical
Manual.
2. Set the switches on the RIB to measure balanced audio.
3. Set the test set to measure Rx line level and adjust RV5 or RV5B for the
level that is require if necessary.
4. Set the test set to measure TX modulation level. Set the audio generator
output level as per the required line level and measure the TX modulation
depth. Adjust RV4 or RV4B for the modulation depth that is require if
necessary.
5. Replace the MX800 cover.
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