Led Indicators - GE MDS SD4A Technical Manual

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Table 14. Troubleshooting Guide (Continued)
No link with Master,
a. Check for secure interface connections at the radio and
or poor overall
the connected device.
performance.
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 a. Verify correct IP address is set.
to user interface
b. Ensure PC is set to same subnet as radio.
(Ethernet system)
Ethernet port shuts a. Excessive data throughput. Do not connect radio to a LAN
down with high traffic levels.
b. Auto Power Save is shutting the port down. Disable Auto
Power Save on Ethernet Port Configuration screen.
No communication a. Connect terminal emulator to COM1 port, cycle power,
to user interface and press the Enter key within 10 seconds to obtain Login
(serial system) prompt.
BER is too high. a. If in packet mode, check the packet settings screen for
Data throughput is proper configuration.
spotty.
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 a. Disconnect the device connected to COM2, and disable
from Sleep Mode 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 Contact GE MDS for password reset authorization code.
forgotten Proof of authorized user required.
Alarm message No load on Antenna connector or poor/shorted/open load.
"RF Output Out of Check condition of antenna cable, connectors, and antenna
Range" system.
Transmitter keys Many terminal programs raise the RTS line by default.
when using terminal Keying can be avoided by setting the transceiver's RTSkey
communications parameter to OFF (Radio Configuration>>Advanced
program. Settings Screen)

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.
SD Series Technical Manual MDS 05-4846A01, Rev. F