84
SD Series Technical Manual
MDS 05-4846A01, Rev. F
7.1 LED Indicators
The LED status indicators are an important troubleshooting aid, and
should be checked whenever a problem is suspected. Table 10 on
Page 31 describes the function of each status LED and their normal indi-
cations.
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.
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 COM2/COM1 port settings
screen for proper configuration.
Latency is too high.
a.
Adjust packet node 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.
Password lost or
forgotten
Contact GE MDS for password reset authorization code.
Proof of authorized user required.
Alarm message
“RF Output Out of
Range”
No load on Antenna connector or poor/shorted/open load.
Check condition of antenna cable, connectors, and antenna
system.
Transmitter keys
when using terminal
communications
program.
Many terminal programs raise the RTS line by default.
Keying can be avoided by setting the transceiver’s
RTSkey
parameter to
OFF
(
Radio Configuration>>Advanced
Settings Screen
)
Table 14. Troubleshooting Guide
(Continued)