Chapter 12
Using TD-SCDMA Signal Analyzer
444
JD700B Series User’s Guide
Power vs. time (frame)
The Power vs. Time (Frame) measures the modulation envelope in the time domain, showing the power of
each time slot of the TD-SCDMA signal.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 429, you can
continue your measurement. The measurement settings can be saved and recalled as a file.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
Press the
Slot Number
soft key, and then select the time slot number to be displayed:
TS0
,
TS1
,
TS2
,
TS3
,
TS4
,
TS5
, or
TS6
.
3
Press the
Spread Factor
soft key, and then select the spread factor option:
DL Auto
for auto
detection of downlink,
UL Auto
for auto detection of uplink,
SF1
,
SF2
,
SF4
,
SF8
, or
SF16
4
To set the number of maximum users, complete the following steps:
Press the
Max Users
soft key.
Enter a value up to 16 by using the numeric keys.
Press the
Enter
soft key.
5
Optional
. To set the delay, complete the following steps:
Press the
Delay
soft key to set the amount of delay in µs.
Enter a value by using the numeric keys. You can also use the rotary knob.
Press the
µs
soft key.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
6
Optional
. Press the
Miscellaneous
soft key, and then do the following as needed:
To select how to determine scrambling estimation, toggle the
Scramble
soft key and select
Spec
or
Full
.
NOTE
The Spec searches “Sync Sequence Number” from 0 to 31 based on the TD-SCDMA
specification and determines “Scrambling Code Number” by using the sync sequence
number, while the Full does from 0 to 127 fully.
To select how to determine the Midamble spread factor estimation either in full or maximum
power search, toggle the
Mid SF Map
soft key and select
Max
or
Spec
.
NOTE
The Max determines the spread factor of the Midamble by using the maximum power of
the received Midamble, while the Spec searches “Default Midamble Allocation” based on
the TD-SCDMA specification.
To select the detect mode, press the
Detect Mode
soft key and then select the option:
Auto
,
QPSK/8PSK
,
QPSK
,
8PSK
,
16 QAM
, or
64 QAM
.
Содержание CellAdvisor JD700B Series
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