Chapter 10
Using CDMA Signal Analyzer
374
JD700B Series User’s Guide
Performing power statistics CCDF measurements
The Power Statistics Complementary Cumulative Distribution Function (CCDF) measurement characterizes
the power statistics of the input signal. It provides PAR (Peak to Average power Ratio) versus different
probabilities.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 352, you can
continue your measurement. The measurement settings can be saved and recalled as a file. You can also
use JDViewer, PC application software to configure a measure setup, save as a file, and load the file on to
the instrument.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
Press the
CCDF Length
soft key to set the length of the CCDF.
3
Enter a value between 1 and 100 by using the numeric keys. You can also use the rotary knob.
4
Press the
Enter
soft key.
Measurement example
Figure 221 CCDF measurement with CDMA signal analyzer
Conducting CDMA OTA measurements
This Over The Air (OTA) measurement has channel scanner, PN scanner, multipath profile, and Code
Domain power screens. It is used to verify CDMA transmitter performance at any location providing reflective
measurements and identifying signals providing from different sites. The Code Domain power shows not
only modulation performance metric but also amplifier capacity and code utilization metric. The Amplifier
capacity (code utilization) measurement is an estimate of the amount of power amplifier capacity (code
utilization) that is being used expressed in percent of maximum.