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132 Chapter 5
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CDMA Measurements - Screens and Control Fields
CDMA Measurements
Adjacent Channel Power Measurements
ACP
Adjacent channel power can be measured at frequency offsets of 0 to
3 MHz, and filter bandwidths of 10 kHz to 1.23 MHz with 100 Hz
resolution. This measurement returns three, channel-tuned power
values:
• Center Channel - the channel power at the center frequency
• Upper ACP Ratio - the ratio of the total power in the specified
bandwidth at the specified offset above the center frequency, to the
power at the center frequency.
• Lower ACP Ratio - the ratio of the total power in the specified
bandwidth at the specified offset below the center frequency, to the
power at the center frequency.
NOTE
This measurement must be calibrated using the ACP Cal field each
time the tune frequency is changed. You must always remove power at
the ANT IN or RF IN/OUT connector before calibrating channel power
to ensure accurate calibration.
Screens on which this measurement is made:
• CDMA ANALYZER
• CDMA GENERATOR
Channel Power Measurements
Chan Pwr
Channel power can be measured using one of two filters selected with
the Ch Pwr Filt field on the CDMA ANALYZER screen:
• 1.23M - Channel power is the absolute power level of the RF signal
in a 1.2 3MHz bandwidth centered around the RF channel or tune
frequency setting.
• 30kHz - Channel Power measures the power in a 30 kHz band.
NOTE
This measurement must be calibrated using the Chan Pwr Cal field
each time the tune frequency is changed. You must always remove
power at the ANT IN or RF IN/OUT connector before calibrating
channel power to ensure accurate calibration.
Refer to the Agilent Technologies 8935 CDMA Base Station Tests
Applications Guide for more information about channel power
measurements.