User's Manual Part 3

RX Frame Error Rate (FER) Acceptance Test
Apr 2001
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SC4812ET BTS Optimization/ATP — CDMA LMF
DRAFT
Background: FER Test
This test verifies the BTS Frame Error Rate (FER) on all traffic channel
elements currently configured on all equipped MCCs (full rate at 1%
FER) at an RF input level of –119 dBm [or –116 dBm if using Tower
Top Amplifier (TMPC)]. All tests are performed using the external
calibrated test set as the signal source controlled by the same command.
All measurements will be via the LMF.
The pilot gain is set to 262 for each TX antenna and all channel elements
from the MCCs are forward-link disabled. The BBX2 is keyed up using
only bbxlvl level offsets, to generate a CDMA carrier (with pilot channel
element only). BBX2 power output is set to –20 dBm as measured at the
TX OUT connector (on either the BTS or RFDS directional coupler).
The BBX2 must be keyed in order to enable the RX receive circuitry.
The LMF prompts the MCC/CE under test to measure all zero longcode
and provide the FER report on the selected active MCC on the reverse
link for both the main and diversity RX antenna paths, verifying the
results meet the following specification: FER returned less than 1% and
total frames measured is 1500.
All MCC/CEs selected are tested on the specified RX antenna path. The
BBX then de-keys and, the applicable redundant BBX2 is assigned to
the current RX antenna paths under test. The test is then repeated.
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