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 Superseded Technical Information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
8. Link the necessary links near RV9 as instructed on motherboard.
9. Install the jumper link to JMP25 (Tone to Speaker) on the motherboard.
MX800 Software Controller Setup:
There is no specific Controller setup required.
MX800 Testing – Speaker:
1. Connect a Communications Test Set (CTS) and the necessary I/O
connection to the MX800.
2. Connect Dummy load to MX800 RF out put (CN8)
3. Connect the MX800 Rx input to the RF out (or Duplex out) of the CTS.
4. Set-up the CTS for operation with the audio generator set to 1kHz @ -10
dBm and the audiometer to show Audio input level.
5. Disconnect Speaker from SKM and Connect CTS Audio in to the speaker
output connector SKM (SPKR).
6. Operate the volume control for maximum audio output, monitor this on
the CTS and then adjust RV10 until the audio level is +5dBm. Reduce
the audio level using the volume control and connect the MX800 speaker
to SKM.
MX800 Testing – Microphone:
1. Connect a Communications Test Set (CTS) and the necessary MX800 I/O
connection. Connect a Microphone cable to the Microphone socket of the
MX800 so that you can inject into pins 4 (Mic Audio) & 5 (GND). You’ll
also need to connect a switch or be able to short pins 3 & 5.
2. Set-up the CTS for duplex operation with the audio generator set to -20
dBm and the audiometer to show output line level. With Rx line (CN1
pin 15) audio connect to CTS audio input.
3. PTT the MX800 and adjust RV11 for –10dBm on the audio level meter.
4. Set the audio generator for –50dBm and install a jumper link onto JMP22
on the motherboard. The audio meter should read approx. –9dBm and
reducing the audio generator level in 1dB increments the meter level
should also reduce, increasing the level should cause the audio cct to
limit the audio level to approx. –8dBm.
5. Remove the Link from JMP22 and increase the audio generator level to –
10 dBm.
6. Set the test set to display TX modulation depth and measure the
modulation level. The modulation level should be approximately equal
to the nominal deviation level for the Transmitter. I.e. 3 kHz wide band
and 1.5 kHz Narrow band.
7. Remove the Microphone cable from the MX800 MIC socket.
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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