User's Manual

TX Code Domain Power/Noise Floor Acceptance Test
08/01/2001
4-15
1X SCt4812ET Lite BTS Optimization/ATP
PRELIMINARY
Background
This test verifies the Code Domain Power and Noise Floor 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 connector.
Pilot gain will be set to 262 for each antenna and all equipped MCCs
will be configured to supply all odd–numbered Walsh code Traffic
channel elements by enabling Orthagonal Channel Noise Source
(OCNS) on all odd MCC/CEs, (maximum 32 full rate channels with an
OCNS gain of 81). All even–numbered Walsh code Traffic channel
elements will not have OCNS enabled, and are considered “OFF”. All
equipped MCCs will be forward–link enabled for the antenna/sector
under test.
The BBX2 will be keyed up using both
bbxlvl and bay level offsets, to
generate a CDMA carrier consisting of pilot and OCNS channels. RF
output power is set at 40 dBm as measured at the appropriate TX output.
The calibrated communications test set will measure and return the
channel element power (dB) of all specified Walsh channels within the
CDMA spectrum. Additional calculations will be performed to verify the
following parameters are met (Figure 4-2):
S Traffic channel element power level will be verified by calculating the
ratio of PILOT power to OCNS gain of all traffic channels (root sum
of the square (RSS) of each OCNS gain divided by the Pilot power).
This value should be 10.2 dB +
2.0 dB.
S Noise floor (unassigned “OFF” even numbered Walsh channels) are
verified to be <
–27 dB (with respect to total CDMA channel power).
The BBX2 will then dekey, and if selected, the redundant BBX2 will be
assigned to the current TX antenna path under test. The test will then be
repeated. Upon completion of the test, OCNS channels will be disabled
on the specified MCC/CEs.
Code Domain Power/Noise
Floor Test
Follow the steps in Table 4-8 to verify the Code Domain Power/Noise
floor of each BBX carrier keyed up at a specific frequency.
4