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Chapter 5 159
CDMA Measurements - Screens and Control Fields
Control Fields for CDMA Measurements
Gain
This field sets the IF gain of the CDMA analyzer for rho, EVM, and
channel power measurements. (Range: 0 dB to 36 dB in 6 dB steps.)
Gain is adjusted two ways:
• Auto measures the signal level and automatically adjusts the gain.
• Hold disables automatic operation to allow you to manually enter
the desired gain by selecting the current gain setting and entering a
new value using the keypad or cursor control knob.
This field is replaced by the Pwr Gain field when measuring average
power on the CDMA ANALYZER screen. See “Input Atten” on page 161
for more information.
Screens on which this field is present
CDMA ANALYZER
COD DOM (Code Domain Analyzer): gain controls menu
Gen Dir
This field sets the link direction of the CDMA signal.
• Fwd (forward) sets the CDMA generator to produce QPSK
modulation to imitate a base station. The EQ filter field is
automatically displayed and set to EQ In to apply an equalizing
filter to the I and Q paths as part of the baseband filtering, but it can
be changed to Out.
• Rev (reverse) sets the CDMA generator to produce OQPSK
modulation to imitate a mobile station. The EQ filter field is not
displayed because it is automatically set to Out (and cannot be
changed). It is set to Out to remove the equalizing filter from the I
and Q paths.
Screens on which this field is present
CDMA GENERATOR