User's Manual

20 MDS TransNET I/O Guide MDS 05-2708A01, Rev. A
6.0 OPERATION
6.1 Initial Start-up
In-service operation of the MDS TransNET 900™ transceiver is completely
automatic. Once the unit has been properly installed and configured, operator
actions are limited to observing the LED status indicators for proper operation.
If all parameters are correctly set, operation of the radio can be started by
following these steps:
1. Apply primary power to the radio.
2. Observe the transceiver LED status panel ( Figure 17 ) for the proper
indications. Table 4 provides a complete explanation of the LED functions.
In a normally operating system, the following LED indications will be seen
within 16 seconds of start-up:
• PWR lamp lit continuously
•
SYNC lamp lit continuously
• Remote radio
(s) transmitting data (TXD) and receiving data (RXD)
with the master station
Invisible place holder
Figure 17. LED status indicators
6.2 Performance Optimization
After the basic operation of the radio has been checked, you may wish to
optimize its performance using some of the suggestions given here. The
effectiveness of these techniques will vary with the design of your system and
the format of the data being sent.
Complete instructions for using the software commands referenced herein are
provided in Section 7.0, TRANCEIVER PROGRAMMING (beginning on page
22).
PWR SYNC TXD RXD
Table 4. LED status indicators
LED Name Description
PWR • Continuous—Power is applied to the radio; no problems detected.
• Flashing 5 times per second—Fault indication.
See
Section 8.0, TROUBLESHOOTING (beginning on page
34)
.
• Flashing once every 4 seconds—radio is in Sleep mode.
SYNC Lights continuously to indicate the radio is receiving/sending
synchronization frames. Normally, within 10 seconds of power-up, this
LED should be lit continuously.
TXD Indicates EIA-232 space (logic high) signal input to the DB-9 connector.
RXD Indicates EIA-232 space (logic high) signal output from the DB-9
connector.