User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
6
. Issue 1.6. Date3/2/99
DLP-014
Page 16 of 60 © Copyright Airspan Communications Corporation 1999
e) Use the cursor to highlight the subscriber line for simulated off hook.
f) Once the subscriber line is highlighted, use the cursor to select Test View
under the View option.
g) With the Test View opened, point and click the Reserved Line button. If
the line is in idle state the test menu will be displayed.
h) From the test menu, point and click ST Loopback button.
i) Select the loopback direction as Towards Network and check TU
through path on timeslot 1 and 2.
j) Once the above is configured point and click OK button. This will set the
radio traffic mode: high rate and high power.
k) Once the test menu is available again leave the menu open, do not close
or free line if the traffic mode is to be maintained.
5. Adjust the gain control voltage on the Sitespan to achieve a RF Power level of nominally
+5dBm on the RF Power meter. The exact reading should be 8dBm ± 0.5dB minus the
measured loss from point B to point C in Figure 7-3. Record the voltage and power level
on the Test Result Sheet.
6. Remove the loopback by selecting Loopback Off and reset the TU through path.
Click OK to deactivate the loopback. Close test menu and return to the Subscriber
View.
7. Putting the rack back in service
a) Switch the Test CRU and CT Rack OFF.
b) Remove the Test CRU and all interconnecting cables and accessories
from the RF Output connectors on the CT.
c) Re-connect the Antenna /Feeder tails to the CT.
d) Connect the Sitespan cables to the 25 way EM/Sitespan port on the
modem backplane
e) Re- connect the 2Mbit/s ports to the 2Mbit/s IN (SK16 - BNC or PL7 -
Type 43) and 2Mbit/s OUT (SK15 - BNC or PL8 - Type 43) connectors
on the shelf interface connections located at the right hand side of each
Modem Shelf.
f) Switch the CT Rack ON and wait for the system to complete the power-
up self test sequence successfully.
This concludes the CT set-up tests.