HP Cell Phone Accessories E6380-90019 Manual Do Utilizador
Chapter 4
101
CDMA Measurements - Screens and Control Fields
Gen Dir
Gen Mode
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 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
automatically set to
Out
(and cannot be changed) to remove the
equalizing filter from the I and Q paths.
Screens on which this field is present
CDMA GENERATOR
Gen Mode
This field selects the type of modulation information sent to the CDMA
generator’s IQ modulator.
generator’s IQ modulator.
•
Data
allows data to be transmitted to simulate a traffic channel with
no additive noise. (See the
•
Eb/No
causes a combination of data and White Gaussian Noise
(AWGN) noise to be transmitted. The value entered is the ratio
between the energy of each information bit (E
between the energy of each information bit (E
b
) and the noise
spectral density (N
o
), expressed in dB.
•
Noise
causes a signal modulated by White Gaussian Noise to be
generated. The noise is band limited to 2 MHz and white inside a
1.25 MHz bandwidth centered around the
1.25 MHz bandwidth centered around the
RF Gen Freq
. This
selection removes the
Data Source
,
Start Frame
, and
# of
Frames
fields from the screen; those fields are only used with the
Data
and
Eb/No
entries.
Screens on which this field is present
CDMA GENERATOR
Main Menu