Agilent Technologies 8935 series e6380a Manuale Utente
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.)
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.
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
for more information.
Screens on which this field is present
CDMA ANALYZER
COD DOM (Code Domain Analyzer): gain controls menu
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
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
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
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