Chapter 12
Using TD-SCDMA Signal Analyzer
JD700B Series User’s Guide
435
Capture the selected trace and compare traces
Capture
C
Load a saved trace
More (1/2) > Load
L
Hide the displayed trace
Trace View > Off
F
Remove all the traces and initialize the trace
settings
More (1/2) > Trace
Clear All
NOTE
For the
Max Hold
and
Min Hold
, your instrument compares newly acquired data with the
active trace and displays larger maximum values or smaller minimum values on the
screen. You can set it to
Unlimited
to hold and view maximum or minimum data or
specify a certain amount of time up to 60 seconds by using numeric keys or rotary knob.
4
Optional
. Select
More (1/2) > Trace Info
, and then select the trace number to view the trace’s
parameter setting information stored at the time of the measurement or
None
to hide the
information display.
5
Optional.
If you have the two traces T1 and T2, you can perform trace math. To view the power
difference between the traces, press the
T1 – T2 -> T5
or
T2 – T1 -> T6
soft key.
The result is overlaid on the screen along with the second Y-axis.
Conducting RF measurements
Channel power
The Channel Power measurement determines the average power of an RF signal burst at or above a
specified threshold value.
The purpose of the Channel Power measurement is to determine the power delivered to the antenna system
on the RF channel under test. The instrument acquires a TD-SCDMA signal in the time domain. The average
power level above the threshold is then computed and displayed.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 429, you can
continue your measurement.
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
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.
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