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9-5 ECM Communication Troubleshooting
Communication tests in areas with frequent bad lines have led to the following countermeasures.
1.
Excessive Impulse Noise
Reduce the frame size to 64 octets.
To do this, set bit 1 of bit switch 1A to 1.
2. Poor Signal-to-noise Ratio
Adjust the training error tolerance with bits 6 and 7 of bit switch 8. The most effective setting is different for
each data rate, as follows.
9600 bps: 0
7200 bps: 2
4800 bps: 4*
2400 bps: 15
* This machine can not use this setting, so try either 2 or 10.
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