Microhard Systems MRX-900, Руководство по эксплуатации

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MRX-900 Operating Manual: Troubleshooting
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E. Troubleshooting
Here are solutions to some of the common problems and symptoms that may be experienced.
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Problem: I am trying to set up the MRX-900 but I cannot get the configuration menu to appear.
Solutions: 1. Make sure you are depressing the Configuration Button for at least 2 or 3 seconds. The
Configuration Menu, by design, only shows up after the button has been held briefly to prevent
unintentional triggering.
2. Check that the power adapter is snugly inserted into the power input jack, and that the AC-outlet is
live. You can verify that the MRX-900 is operational and that it is receiving power by the
continuous illumination of the receive LED.
3. Ensure that your RS-232 cable is the correct type – that it is a straight-through rather than a crossover
or null-modem cable, and that it is the correct cable for your terminal. Also ensure that the mating
connectors are seated properly.
4. Verify that you are using the correct data port and that it is configured properly (this check may be
aided by use of a DTE-loopback plug, as explained in section C.3). Ensure that the software has the
correct communications settings for configuration: 9600 bps, 8 bits, no parity, 1 stop bit (8N1). If
the serial communications between the MRX-900 and your terminal is working correctly, an
initialization message should appear each time you power up the unit.
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Problem: I have configured my MRX-900s, but I cannot achieve a communications connection. The RSSI LEDs
are
unlit .
Solutions: 1. Ensure that the Wireless Link Rate, Network Address, and Hopping Pattern are the same for all units.
If using the modems in multipoint operation, ensure that each Slave has a unique Unit Address and
they are included in the Slave List of Repeaters (if applicable) and of the Master. In point-to-point
mode, ensure the Unit Address on both Master and Slave are the same. Once these settings are
correct, the RSSI LEDs should illuminate when communicating units are powered up.
2. The power level is too high or too low for the current arrangement of MRX-900s. First, ensure that
antennas are properly and snugly connected. If the units are in very close proximity (within several
feet) and the power level is too high, they will be saturated and may not operate efficiently.
Conversely, if the modems are far away from each other or there are many obstacles between them, a
higher level may be required for the modems to pick up each other’s signal.
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Problem: I have configured my MRX-900s, but I cannot achieve a communications connection. The RSSI LEDs
are
lit .
Solutions: 1. Verify that the serial baud rate between each MRX-900 and its connecting DTE are the same.
2. Isolate the problem by directly connecting the DTEs using a crossover cable and setting the port
speeds on both ends the same. If this fails, then the problem is most likely attributable to the
DTE/software application, and use of the MRX-900 in this circumstance will also fail. If the hard
wire connection is successful, then the problem may be a cabling issue. Ensure that all cables are
straight-through RS-232 cables and that they are connected properly to all devices.
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Problem: I have the serial data ports on both my DTEs and MRX-900s set the same, but I cannot achieve a
throughput near serial rate I’ve set up.
Solutions: 1. Verify that the Wireless Link Rate on all modems are set to a rate which provides a wireless link
higher than the serial links, since a lower wireless rate will “bottleneck” the communications link.