MDS 05-3305A01, Rev. B
MDS 4710/9710 I/O Guide
31
• Secure connections (RF, data and power)
• An efficient and properly aligned antenna system with a good
received signal strength of at least –90 dBm. (It is possible for a
system to operate with weaker signals, but reliability will be
degraded.)
• Proper programming of the transceiver’s operating parameters
(see Section 5.0, TRANSCEIVER PROGRAMMING on page 17).
• The correct interface between the transceiver and the connected
data equipment (correct cable wiring, proper data format, timing,
etc.)
6.1 LED Indicators
The LED status indicators are an important troubleshooting tool and
should be checked whenever a problem is suspected. Table 5 on page 16
describes the function of each status LED.
6.2 Event Codes
When an alarm condition exists, the transceiver creates a code that can
be read on an HHT connected to the
DIAG.
port. These codes can be very
helpful in resolving many system difficulties. Refer to Table 9 (page 32)
for a definition of the event codes.
Checking for Alarms—STAT command
To check for alarms, enter
STAT
on the HHT. If no alarms exist, the mes-
sage
NO ALARMS PRESENT
appears at the top of the display (Figure 12).
Invisible place holder
Figure 12. HHT Display in Response to STAT Command
If an alarm does exist, a two-digit alarm code (00–31) is displayed and
the event is identified as a Major or Minor Alarm. A brief description of
the alarm is also given.
If more than one alarm exists, the word
MORE
appears at the bottom of
the screen. To view additional alarms, press
.
ENTER
