Nortel DualMode 800, Maintenance Manual

Page: 161 / 216

DRU receive tests 11-23
Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08
The DRU will request a channel number. Enter the channel number for the
frequency assigned to the DRU under test (1...799 or 990...1023). Refer to
Appendix A for the channel-to-frequency conversion information.
>xxxx
On a successful channel change, the Channel and Synth Lock fields will
be updated:
Channel: xxxx
(DRU channel number indicated)
Synth Lock: YES
(Sync Lock changes to ‘YES’)
5. On the communications monitor, set the receiver RF frequency to the
frequency corresponding to that of the DRU under test. For an IFR 1600,
by selecting the transmitter frequency, the receiver frequency will
automatically be set.
6. Proceed with the receive tests.
After performing a receive test on the A path of the receiver, perform the test
again on the B path. From the terminal, use the N command to change the
Antenna Path to ‘B’ and use the M command to select antenna port 4 for the
new receive path.
Note: Change the connection to the antenna input port 4 accordingly.
For sectored sites, perform also the following:
1. Use the N command to change the Antenna Path to ‘A’ and use the M
command to change the antenna ports to 2 and 5. Perform the receive
tests.
2. Use the N command to change the Antenna Path to ‘B’ and ensure that the
antenna ports are still 2 and 5. Perform the receive tests.
3. Use the N command to change the Antenna Path to ‘A’ and use the M
command to change the antenna ports to 3 and 6. Perform the receive
tests.
4. Use the N command to change the Antenna Path to ‘B’ and ensure that the
antenna ports are still 3 and 6. Perform the receive tests.
Note: Change the connection to the antenna input ports accordingly.