User's Manual

Chapter 5 Deploying the NCL1135
APCD–NC003–1.0 39
5.1.3 Performing the Transmit/Receive Loopback Test
This test should only be used when setting up a new network. The purpose of this test is to
ensure that the Master NCL1135 can “see” the Station. It also determines the quality of the
links between Master and Station. The test originates at the Master NCL1135, repeatedly
sending test packets to the Stations. A Station recognizes these as test packets from the
Master and echoes them back to the Master. When the Master receives the replies from the
Station, it updates its Radio PER for that Station. One Master NCL1135 can have up to ten
Stations simultaneously echoing test packets back to it.
You will need one NCL1135 configured as a Master and at least one NCL1135 Station.
CAUTION: Do NOT run this test in a working network. Doing so will cause every
device in the network to slow down.
1. Ensure that the Master NCL1135 and Station NCL1135s have been configured and
tested.
2. Deploy the Master and at least one Station connecting the antennas for each device
as required.
WARNING!
Antennas and associated transmission cable must be installed
by qualified personnel. Failure to terminate the antenna port
correctly can permanently damage the NCL1135. WaveRider
assumes no liability for failure to adhere to this recommendation
or to recognized general safety precautions.
3. Connect a terminal to the Master NCL1135 using a serial cable and log into the
device.
4. At the Master NCL1135 console terminal, type <radio txrx start> to begin the
Transmit/Receive Loopback test and automatically start the Radio PER display. “Tx/
Rx test started” is displayed when the test is started. Refer to
Displaying the Radio
Packet Error Rate (PER)
, on page 41 for more information.
5. Using the information from Radio PER, determine the quality of the link between the
Master and Stations.
6. When done, press any key to stop Radio PER, then stop the Transmit/Receive
Loopback Test by typing <radio txrx stop>.