User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
6
. Issue 1.6. Date3/2/99
DLP-013
Page 4 of 60 © Copyright Airspan Communications Corporation 1999
b) Set up Sitespan with an empty database Set the modem shelf properties (Shelf Frequency
and PN codes) to the same as the existing modem shelf. Failure to do this will result in
the site controller 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 or DLP-018/019)
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 7-3.