User's Manual
TX Code Domain Power/Noise Floor Acceptance Test68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
4-23
TX Code Domain Power/Noise Floor Acceptance Test
Background
Overview - This test verifies the Code Domain Power and Noise Floor
of each operator-selected BBX carrier keyed at a specific frequency
specified in the current CDF. All tests are performed using the external,
calibrated test equipment controlled by the same command. All
measurements are made at the appropriate BTS TX antenna connector.
CDMA Channel Test Set-up - Pilot gain will be set to 262 for each
antenna and the selected MCCs will be configured to supply all
odd-numbered Walsh code traffic channel elements by enabling
Orthogonal Channel Noise Source (OCNS) on all odd MCC channel
elements (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”. Selected MCCs will be
forward-link enabled for the antenna (sector) under test.
Equipment Operation During Testing - The BBX will be keyed up
using a BLO-corrected
bbxlvl value to generate a CDMA carrier
consisting of pilot and OCNS channels. RF output power, as measured at
the appropriate frame TX antenna connector, is set at one of the
following values depending on the operating frequency spectrum:
800 MHz: 33.5 dBm
1.9 GHz: 31.0 dBm
Test Measurements - The test equipment will measure and return the
channel element power in dB of all specified Walsh channels within the
CDMA spectrum. Additional calculations will be performed to verify the
following parameters are met (refer to Figure 4-3 for graphic
representations):
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.
Noise floor (unassigned “OFF” even-numbered Walsh channels) is
verified to be <
-27 dB for IS-95A/B and CDMA2000 1X with
respect to total CDMA channel power
.
NOTE
When performing this test using the LMF and the MCC is an
MCC8E or MCC24E, the redundant BBX may fail or show
marginal performance. This is due to a timing mismatch that the
LMF does not address. Performing this test from the CBSC will
not have this timing problem.
Redundant BBX Testing - The BBX will then de-key, and if selected,
the redundant BBX will be assigned to the current TX antenna path
under test. The test will then be repeated for the redundant BBX. Upon
completion of the test, OCNS channels will be disabled on the specified
MCC channel elements.
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