User's Manual

TX Waveform Quality (rho) Acceptance Test

SC 4812T CDMA BTS Optimization/ATP

May 2000

4-8

Rho Test

This test verifies the transmitted Pilot channel element digital waveform

quality of each BBX carrier keyed up at a specific frequency per the

current CDF file assignment. All tests are performed using the external

calibrated test set controlled by the same command. All measurements

are via the appropriate TX OUT (BTS/RFDS) connector.

The Pilot Gain is set to 262 for each antenna, and all channel elements

from the MCCs are forward link disabled. The BBX2 is keyed up using

both bbxlvl and bay level offsets, to generate a CDMA carrier (with pilot

channel element only, Walsh code 0). BBX2 power output is set to 40

dBm as measured at the TX OUT connector (on either the BTS or

RFDS directional coupler).

The calibrated communications test set measures and returns the Pilot

channel element digital waveform quality (rho) in dB, verifying that

result meets system tolerances:

 Waveform quality (rho) should be > 0.912 (–0.4 dB).

The BBX then de-keys and, if selected, the MCC is re-configured to

assign the applicable redundant BBX2 to the current TX antenna path

under test. The test is then be repeated.