Encom ENC-900, Operating Manual

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36 ENC-900 Operating Manual: Chapter 4 Configuration
4.4 Diagnostics, Statistics and Remote Control
The ENC-900 provides several commands which are very useful for
troubleshooting and analyzing the performance of the radio system.
4.4.1 Spectrum Analyzer Feature (ATG)
Issuing the command ATG <return>,causes the ENC-900 to perform a
sweep of the entire operating spectrum, giving a signal strength read-out in
dBm for each channel as shown below:
Noise level, '*'- mean value, '.'- max value
ch 1 -138dBm *
ch 2 -139dBm *
ch 3 -139dBm *
ch 4 -139dBm *
ch 5 -139dBm *
ch 6 -139dBm *
ch 7 -130dBm *
ch 8 -116dBm *
ch 9 -135dBm *
...
ch 127 -135dBm *
Paging -135dBm *
Channel 1 is at frequency 902.4 MHz, with all subsequent channels in 200
kHz increments. This feature also displays average received signal strength
for 12 channels above the 902-928 MHz ISM band. This area of the
spectrum is used by paging networks.
When deploying a network, the spectrum analyzer feature is useful for
determining which parts of the ISM band may be noisy. This knowledge
can be used to select an appropriate hopping pattern, or for creating a
custom hopping pattern which avoids those frequencies.
4.4.2 Statistics (ATP)
The ATP <return> command provides a list of several statistics as follows:
# of data packets sent = 0
# of data packets received = 0
# of Remote's retries = 0
# of Remote's packets dropped = 0
# of Remote's sync errors = 0
# of CRC errors = 0
OK
The ENC-900 starts the statistics count at zero each time the unit is
powered up, or after the ATP command has been issued. By entering the
ATP command, all statistics are cleared back to zero. The maximum limit
for each statistic is 65535.