GE MDS MDS SD9, Startup Manual, Page: 14 / 20

12 MDS SD9 Startup Guide 05-xxxxA01, Rev. 01
Internal Spectrum Analyzer
The radio contains a built-in spectrum analyzer tool that can be dis-
played on a connected PC. The tool is helpful in diagnosing interfer-
ence problems on or near your channel frequency.
Access the spectrum analyzer by entering
spectrum
at the command
prompt. A display appears showing detected signals on your current
channel .
Optionally, you can specify a frequency at the command prompt to
view the surrounding spectrum of that frequency. To do this, enter
spectrum xxx.xx
, where
xxx.xx
is the frequency in MHz.
The display creates a received signal strength indication (RSSI) vs.
frequency plot for the frequency and surrounding signals. By ana-
lyzing the display, you can determine the presence of other signals
near the transceiver’s operating frequency. This information can be
helpful in troubleshooting interference problems.
COM1/COM2 REFERENCE
COM1 CONNECTIONS
The
COM1
connector is used to connect a PC to the radio for manage-
ment or diagnostics. A straight-through cable is required that connects
Pin 2 (RXD), Pin 3 (TXD), and Pin 5 (Ground). (See
Figure 8 .)
18 Minor A data framing error has been detected on the
COM2 INTERFACE connector. This may indicate a
baud rate mismatch between the radio and the RTU.
26 Minor The DC input voltage is out-of-tolerance. If the
voltage is too far out of tolerance, operation may fail.
31 Minor The transceiver’s internal temperature is
approaching an out-of-tolerance condition. If the
temperature drifts outside of the recommended
operating range, system operation may fail.
Table 4. Event Codes
(Cont’d)
Event
Code Event
Class
Description