Troubleshooting Chart; Technical Reference; Technical Specifications - Microwave Data Systems MDS 9810 Installation And Operation Manual

56 MDS 9810 Installation and Operation Guide

7.4 Troubleshooting Chart

Table 14 provides suggestions for resolving system difficulties that may
be experienced in the radio system. If problems persist, contact the fac-
tory for further assistance. Refer to the inside back cover of this guide
for contact information.
Table 14. Troubleshooting Chart
Difficulty Recommended System Checks
Unit is a. Check for the proper supply voltage at the power connector.
inoperative.
b. The transceiver's internal resettable fuse may have tripped. To
reset it, momentarily remove and re-apply power to the radio.
Interference is a. Verify that the system has a unique network address. Nearby
suspected. systems with the same address will cause interference.
b. Use the ZONE DATA command (Page 49) to check for
interference in specific zones. Lock out affected zone(s) using
the SKIP command (Page 46).
c. If omnidirectional antennas are used on remote stations,
consider changing to directional antennas. This will often limit
interference to and from other stations.
No a. Check for secure interface connections at the radio and the
synchronization connected device.
with master, or
b. Check the antenna, feedline and connectors. Reflected power
poor overall
should be less than 10% of the forward power reading
performance.
(SWR
c. If the remote radio is in synchronization, but performance is
poor, check the received signal strength using the RSSI
command (Page 42). If RSSI is low, it may indicate antenna
problems, or misalignment of directional antenna headings.
d. Verify proper programming of system parameters: mode,
network address, data interface baud rate, transmitter power,
CTS delay, etc. It may be helpful to use the INIT command
(Page 41), which resets all parameters to factory defaults.
e. Check for alarms using the STAT command (Page 47)

8.0 TECHNICAL REFERENCE

The following section contains material that is not essential to using the
radio, but may prove helpful in diagnosing performance problems or in
gaining a better understanding of the unit's operation.
8.1 Technical Specifications
GENERAL
Frequency Hopping Range:
Hop Pattern:
Frequency Stability:
Simplex Operation:
Half-Duplex Operation:
≈
2:1 or lower).
Up to 1019 frequencies within:
902–928 MHz,
configurable in 3.2 MHz zones
Based on network address
±1.5 ppm
User selectable
±1.6 MHz TX/RX split
MDS 05-3301A01, Rev. C