Technical Manual Technical Description
© SPECTRA ENGINEERING 2006 Revision 4.2.3
55
TX Alignments
1. PTT the transmitter.
2. Set the transmitter modulation frequency to 1 kHz, -10dBm level
injected in through the rear RJ45 connector, pin3 & 4. (Balanced
audio)
3. Disable Notch Filter JMP9 (Position 1-2)
4. Disable AGC on Option Board JMP13 (Position 2-3)
5. Adjust TX input line gain RV5 to obtain 1 Vp-p at IC13 pin 1.
6. Monitor TX modulation depth and insure it is equal to the nominal
deviation level. If not just RV4 on the motherboard to obtain
correct level.
3.17.6 Status Tone Encoding And Decoding (T19 only)
This power full option board allow the user to be able to monitor the status of
the MX800. This option works by superimposing fixed audio tones per status
to line. Providing status on mute open or closed. This signal then can be send
down a 2 or 4 wire line system. The decoder then processes the status tones
and applies the various functions as need. I.e. Programmable PTT tones, PTT
ON & PTT OFF.
RX mute status tone encoder provides tone either when mute is open or when
mute is closed depending upon system requirement. Speech or noise
components on the turn frequency can optionally be notched out.
Setup
This section provides a step by step approach to enable the option board for
uses as a Status Tone Encoding And Decoding
Programming
1. Connected option Board Via the RS232 port, run terminal software.
2. Type "RMENU↵" to access inbuilt software menu.
3. Select Configuration Menu (C)
4. Select encoder Menu (E)
5. Select the type of encoder required.
6. Press the Escape Key.
7. Repeat steps 2 & 3
8. Select Decoder Menu (D)
9. Select (1) and enter the PTT decode tone.
10. Also enable AGC (2) And Bandpass filter (3)
11. Programming is complete.
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