D3.16 Installation and Configuration M8SL2-00-002-812
© Copyright Tait Electronics Limited August 2004. All rights reserved.
One possible cause of incorrect operation is that the line connections have become
transposed in the wiring network or that the dispatch terminal uses different
Send/Receive pairs.
2. Use the dispatch console to key-on the transmitter. If the transmitter does not key-
on, check that the console and T803 have been compatibly programmed.
• check 2-wire or 4-wire
• check the keytone frequency
• check if function tones are used
• check high level guard tone and function tone periods (if used) are the same
Finally check that the console is sending appropriate signal levels and that tone
durations are correct (which are often variable), and that the line is not causing
unacceptable attenuation or distortion.
3. If the console can key the transmitter but not change Repeater/Basestation Mode,
auxiliary outputs, receiver defeat or cancel alarms, carry out the checks in Step 2
above, but pay particular attention to the function tone programming.
If changing channels is a problem check that the appropriate channel selection
DIP switches (SW1) on the rack backplane are off.
3.3.1 Troubleshooting
1. Sometimes misses function tone command
Set up the Line-In level so that the function tones are about 2V
pp
at TP204.
2. Misses function tone sequence on very fast key repetition
A minimum of 200ms pause is required between pressing buttons on the console. Some
consoles do not limit the maximum keying rate.
3. PGM800Win: “Warning: the Firmware version is not compatible. Data read
maybe incorrect”
This warning occurs when reading the T803 with an old version of PGM800Win.
This can be ignored as the T803 unit is backwards compatible. However, it is recom-
mended to use the latest PGM800Win with full T803 support.
4. Loop-Line functionality (also known as Loopback)
Loopback can be enabled in PGM800Win. It is then activated by sending the T803 the
programmed function tones.
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