MX800 Transceiver Technical Manual
© SPECTRA ENGINEERING 2006 Revision 4.2.3
34
3. Install the qty 4 3x20mm standoff posts into the vacant screw positions.
4. Remove the Link jumpers off connector SKK.
5. Install the Option PCB onto the 4 standoffs with the 16way connector
closest to DIP2 on the Motherboard. Secure with the qty4 3x5mm
machine screws previously removed.
6. Install the 16way-ribbon cable between connector SKK on the
Motherboard and SKK on the Option board, taking note that the cable is
correctly orientated.
7. Check that the option board jumpers are in the following positions;
1. JMP1 IN
2. JMP2 IN
3. JMP3 ON
4. JMP4 OFF
MX800 Controller Setup:
Change the Motherboard jumper JMP5 to position 1-2 (OFF).
MX800 Testing:
Connect a Communications Test Set via the RIB to the MX800.
Set the switches on the RIB to Line Audio and E&M.
Using Mxtools program the appropriate RX CTCSS Tone required.
Set the Comm.’s test set to measure Rx line level and ensure that the
Receiver is operating correctly and there is no CTCSS component on the Rx
audio.
Replace the MX800 cover.
3.10 T10 Power Save Mode
3.10.1 Description
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.
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