User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
6
. Issue 1.6. Date3/2/99
DLP-014
Page 12 of 60 © Copyright Airspan Communications Corporation 1999
Failure to do this will result in the Sitespan overwriting the shelf controller with
its last set values.
c) Connect Sitespan to the 25 way EM/Sitespan port on the modem backplane
d) Set up the test equipment in preparation to connect to the shelf.
e) Select a modem channel for the test. (The modem channel selected should be
one that has an existing subscriber. Programme the test CRU (See DLP-
017/18) with the same programming information as that for the CRU at the ST
associated with the modem under test.
f) Switch rack off by placing both breakers in the off position. . This involves loss
of service to all users. Steps should be taken to minimise disruption by
completing the set-up quickly
g) Select the modem shelf to be tested. Disconnect the 2Mbit/s feeds to the shelf
2Mbit/s IN (SK16 - BNC or PL7 - Type 43) and 2Mbit/s OUT (SK15 - BNC or
PL8 - Type 43) connectors on shelf interface connections located at the right
hand side of each Modem Shelf.
3. Test TX Output Power.
This section describes the measurement of TX output power.
a) Disconnect the antenna.
b) If measuring the power output on shelf 1 and/or 2 connect the Power Meter to
the N-Type connector on DIP/LNA1 at the top of the rack ready to measure the
power output from shelves 1 and 2.
c) If measuring the power output on shelf 3 and/or 4 connect the Power Meter to
the power meter to the N-Type connector on the TX filter card as shown in
Figure 7-9.