Agilent Technologies N9010A, Manual

Page: 77 / 107

Chapter 10 77
Code Domain Measurements
Measurement Procedure
Measurement Procedure
Step 1. Press
Mode
,
TD-SCDMA with HSPA/8PSK
to enable the TD-SCDMA mode
measurements.
Step 2. Press
Mode Preset
to preset the analyzer.
Step 3. Select the signal inputs for the measurement.
For BBIQ measurements this will be the I or I input and the Q or Q
input. Use the procedure in “Using Option BBA Baseband I/Q Inputs.“
Step 4. Press
Input/Output
,
External Gain
,
BTS
and enter the number and
−
dB
according to the external attenuator connected to the analyzer.
Step 5. Press
Mode Setup
,
Analysis Timeslot
to select the timeslot to be
measured.
Step 6. Press
Radio , Device to toggle the device to BTS .
Step 7. Press
Mode Setup
and turn on
HSPA/8PSK Enable
to enable HSPA/8PSK
function.
NOTE
If you don’t install Option N9079A-2FP,
HSPA/8PSK Enable
is grayed
out.
Step 8. Press
Mode Setup
,
Demod
to change the demodulation parameters.
In order to analyze the signal correctly, you need to set the parameters
same as those of the input signal, like
Scramble Code
,
Uplink Pilot
(SYNC-UL),
Uplink Switch Point
and so on.
To specify the modulation format, press
More
, toggle
Mod Scheme
to
Man
and press
Channel Configuration
to select
Mod Format
from
Auto
,
QPSK
,
8PSK
,
16QAM
or
64QAM
.
Toggle
Code Channel Detection
to
Man
and press
Channel Configuration
to
check the keys available to change the parameters for a specific code channel, like
Midamble Shift
and
Phase Shift
.
NOTE
If you don’t enable HSPA/8PSK function,
Mod Scheme
is grayed out.
To analyze 64QAM signals, you need to install Option N9079A-2FP,
turn on
HSPA/8PSK Enable
and manually set
Mod Format
to
64QAM
.