User's Manual Part 2

RX FER Acceptance Test
MAY 2004
7-21
1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU
PRELIMINARY
Background
Overview – This test verifies the BTS Frame Erasure Rate (FER) on all
TCHs currently configured on operator–selected MCCs (fullrate at 1%
FER) at –119 dBm. All tests are performed using the external, calibrated
test equipment as the signal source controlled by the same command.
Measurements are made at the specified BTS RX antenna connection.
Equipment Operation During Testing – The pilot gain on each MCC
will be set to 262 for each TX antenna, and the forward link for all TCH
elements from the MCCs will be enabled. Appropriate BBX(s) must be
keyed in order to enable the RX receive circuitry. Operator–selected
BBXs will be keyed using only
bbxlvl, to generate a CDMA carrier
with pilot channel element only. Transmit power output is set at –40
dBm. Test equipment output power is set so that the received power at
the BBX is –119 dBm. The final output power setting of the test
equipment takes into account the MPC type, BTS RF path losses, and
test cable losses. .
Test Measurements – The LMF will prompt the MCC channel element
under test to measure all–zero longcode and provide the FER report on
the selected active MCC on the reverse link for the main and, if selected,
diversity RX antenna paths. Results are evaluated to ensure they meet
the following specification:
FER returned less than 1% and Total Frames measured is 1500
FER Acceptance Test
Follow the steps in Table 7-9 to verify the FER on RX antenna paths
using selected MCCs and BBXs.
Table 7-9: Test FER
Step Action
1 Set up the test equipment for RX acceptance tests per Table 7-1.
2
* IMPORTANT
If the LMF has been logged into the BTS with a different Multi–Channel Preselector setting than the
one to be used for this test, the LMF must be logged out of the BTS and logged in again with the new
Multi–Channel Preselector setting. Using the wrong MPC setting can cause a false test failure.
3 Select the BBXs and MCCs to be tested.
4 Click on Tests in the BTS menu bar, and select RX > FER... from the pull–down menu.
5 Select the appropriate carrier(s) and sector(s) (carrier-bts#-sector#-carrier#) from those displayed in the
Channels/Carrier pick list.
6
NOTE
To select multiple items, hold down the Shift or Ctrl key while clicking on pick list items to select
multiple carrier(s)–sector(s).
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