GE MDS TransNEXT NET9L, Техническое руководство

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MDS 05-7280A01, Rev. A MDS TransNEXT Technical Manual 51
The radio.repeat sets a fixed number of unconditional retransmissions for downstream data.
8. The RF power output of all radios in a system should be set for the lowest level necessary for
reliable communications. This lessens the chance of causing unnecessary interference to nearby
systems.
4.2 Troubleshooting
All units must meet the basic requirements listed below for proper operation. Check these items first
when troubleshooting a system problem:
•
Adequate and stable primary power
•
Secure cable connections (RF, data, and power)
•
A clear transmission path between Master and each Remote
•
An efficient and properly aligned antenna system providing adequate received signal strength.
•
Proper programming of the transceiver’s parameters
•
The correct interface between the transceiver and the connected data equipment (correct cable
wiring, proper data format, timing, etc.)
LED Status Indicators
The PWR LED typically provides the quickest field indication of a system problem. If the PWR LED is
flashing Red, then an alarm condition is present. (Additional details on LED status are available in
Section 2.3 TransNEXT Connectors and Indicators on page 18).
The “show alarms” command will indicate current active alarm conditions. An example is show below:
>show alarms
Current Alarms:
0.) No ADDR programmed
13.) No Sync
Alternatively, via the web UI click on the alarm icon on the far right of the status banner. A pop-up
window will indicate current alarms.
Event Log
Event logs provide a history of alarm status and can help indicate if a recent change caused a problem.
See section 3.4.2 Event Logging for more information.
Setup Mode
Setup mode can be useful for troubleshooting in bench top settings. Entering the command “ setup
”
temporarily takes the TransNEXT out of normal hopping mode and allows for direct test of transmit and
receive functions. Setup mode is confirmed when the command prompt changes from “
>
” to
“
SETUP>
”.
In Setup mode, the transmit and receive frequencies are set by the “ chan
” (channel) command. Channel
0 corresponds to 902.2MHz and channel 128 corresponds to 927.6MHz. To key on channel type “key”
for a continuous signal or “burst” for a burst operation. Use “dkey” to key down. To check RSSI use