88
SD Series Technical Manual
MDS 05-4846A01, Rev. H
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. (As of
this manual’s release date, this must be performed using a
console terminal session
.
Device Manager
access is
planned for a future release.) Note that access to the unit via
Ethernet will not be possible if the port is currently shut down.
About Auto Power Save:
This feature, enabled by default,
shuts down the Ethernet port if no connection is detected for
approximately 10 seconds, such as when a cable is
unplugged. Ethernet communications will resume when the
connection is restored. If your system experiences Ethernet
connection difficulties in operation, the
Auto Power Save
feature may be disabled. A port that is shut down may also
be restored by cycling the radio’s DC power input.
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.
BER is too high.
Data throughput is
spotty.
a.
If in packet mode, check the
Packet Settings
screen for
proper configuration.
b.
If in serial mode, check the
COM1/COM2 Port
settings
screen for proper configuration.
Latency is too high.
a.
Adjust packet mode settings.
Unit won’t wake up
from Sleep Mode.
a.
Disconnect the device connected to COM2, and disable
Sleep Mode on the
Device Settings
Screen.
b.
Verify that the connected device is outputting the required
0 Vdc to 5 Vdc to control sleep mode on Pin 4 of COM2.
Correct as necessary.
c.
Re-enable Sleep Mode on
Device Settings
Screen,
re-connect device to COM2, and check for proper operation.
Table 14. Troubleshooting Guide (Continued)
