User's Manual

TX Spectral Purity Transmit Mask Acceptance Test
FEB 2005 1X SC 4812T Lite BTS Optimization/ATP 4-13
PRELIMINARY
Background
Overview
This test verifies the Spectral Purity of each operator–selected BBX
Carrier keyed–up 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..
Test Patterns
There are four operator–selectable Test Patterns with which this
Acceptance Test can be performed. The patterns, along with the channels
tested and Gain Setting for each, are listed in Table 3-40. Refer to “TX
Calibration and the LMF” in the Bay Level Offset Calibration section of
Chapter 3 for more information on the Test Patterns..
Equipment Operation During Testing
At least one MCC must be selected to perform the Standard, CDF Pilot,
and CDF Test Patterns. For these Test Patterns, Forward Links are
enabled for Synch Channel (SCH), Paging Channel (PCH), and Traffic
Channel (TCH) Elements from the selected MCC(s), as shown in
Table 3-40.
Gain is set for the applicable channels on each antenna as shown in the
table. The operator–selected BBX Cards will be keyed using a
BLO–corrected bbxlvl Value to generate a CDMA Carrier. RF Output
Power, as measured at the appropriate Frame TX Antenna Connector,
will be set to one of the following depending on the Operating
Frequency Spectrum.:
S 800 MHz: 33.5 dBm
S 1.9 GHz: 31.0 dBm
Test Measurements
The Test Equipment will measure and return the attenuation level in dB
of all spurious and IM products with respect to the Mean Power of the
CDMA Channel measured in a 1.23 MHz bandwidth, verifying that
results meet system tolerances at the following test points. Refer to also
Figure 4-2):
S For 800 MHz:
– At least –45 dB @ + 750 kHz from Center Frequency
– At least –45 dB @ – 750 kHz from Center Frequency
– At least –60 dB @ – 1980 kHz from Center Frequency
– At least –60 dB @ + 1980 kHz from Center Frequency
S For 1.9 GHz:
– At least –45 dB @ + 885 kHz from Center Frequency
– At least –45 dB @ – 885 kHz from Center Frequency
– At least –55 dB @ – 1980 kHz from Center Frequency
– At least –55 dB @ + 1980 kHz from Center Frequency
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