70 SD Series Technical Manual MDS 05-4846A01, Rev. D
Table 14. Troubleshooting Guide
Difficulty Recommended System Checks
Unit is
inoperative.
a.
Check for the proper supply voltage at the power
connector.
b. The transceiver’s internal fuse may have opened. Factory
repair is required.
Interference or
signal overload is
suspected.
a. Use the Spectrum Analyzer/Graph function to check for
interference near the radio channel.
b.
Try re-orienting the station antenna to limit interference to
and from other stations.
c. For excessively strong signals, set RX Signal Attenuation
to ON (Configuration>>Radio>>Advanced Settings). Note:
Also affects the strength of desired, on-channel signals.
No link with Master,
or poor overall
performance.
a.
Check for secure interface connections at the radio and
the connected device.
b. Check the antenna, feedline and connectors. Reflected
power should be less than 10% of the forward power reading
(SWR 2:1 or lower).
c.
If the Remote radio links, but performance is poor, check
the received signal strength using the RSSI feature on the
Radio Performance screen. If RSSI is low, it may indicate
antenna problems, or misalignment of directional antenna
headings.
d.
Verify proper programming of system parameters: mode,
data interface baud rate, RF output power, etc.
e.
Check for alarms using the Statistics/Events screen.
No communication
to user interface
(Ethernet system)
a. Verify correct IP address is set.
b. Ensure PC is set to same subnet as radio.
Ethernet port shuts
down
a. Excessive data throughput. Do not connect radio to a LAN
with high traffic levels.
b. Auto Power Save is shutting the port down. Disable Auto
Power Save on Ethernet Port Configuration screen.
No communication
to user interface
(serial system)
a. Connect terminal emulator to COM1 port, cycle power,
and press the Enter key within 10 seconds to obtain Login
prompt.
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