User Manual

RX FER Acceptance Test
PRELIMINARY
SC 4812ETL BTS Optimization/ATP
08/15/2000
4-18
Background
This test verifies the BTS Frame Erasure Rate (FER) on all Traffic
Channel elements currently configured on all equipped MCCs (fullrate
at 1% FER) at –119 dBm on the main RX antenna paths. The test is
performed on all diversity RX antenna path using only the lowest
equipped MCC/CE. All tests are performed using the external calibrated
test set as the signal source controlled by the same command. All
measurements are via the LMF.
The BDC Pilot Gain will be set to to 262 for each TX antenna, and the
forward link for all TCH elements from the MCCs will be disabled. The
BBX will be keyed up using only bbxlvl level offsets, to generate a
CDMA carrier (with pilot channel element only). TX power output is set
at +10 dBm. (The BBX must be keyed in order to enable the RX receive
circuitry.)
The LMF will prompt the MCC/CE under test to measure all–zero
longcode and provide the Frame Erasure Rate (FER) report on the
selected active MCC on the Reverse Link for both the main and diversity
RX antenna paths, verifying results meet the following specification:
FER returned less than 1% and Total Frames measured is 1500.
The BBX will then de–key, and if selected, the BDC will be
re–configured to assign the applicable redundant BBX to the current RX
antenna paths under test. The test will then be repeated.
4