Nortel DualMode 800, Maintenance Manual

Page: 151 / 216

DRU transmit tests 11-13
Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08
3. Connect the receive input of the communications monitor to the antenna
port of the duplexer. Use a low loss double shielded cable, RG-214 or
equivalent. Figure 11-4 shows the connection setup for the transmit tests.
Note: If you do not want to interrupt service, connect to the sniffer port
on the duplexer instead. The level is approximately 50 dB down with a
tolerance of up to
±
5 dB.
4. From the terminal, select the channel assigned to the TRU under test by
using the B command.
>B
The TRU will request a channel number. Enter the channel number for the
frequency assigned to the TRU 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 transmit RF frequency to the
frequency corresponding to that of the TRU under test.
6. Turn on the TRU (the transmit carrier) with the C command.
>C
The PA status on the screen will change to:
PA: on
7. Proceed with the transmit tests.