Chapter 7
Using WCDMA/HSPA+ Signal Analyzer
JD700B Series User’s Guide
179
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
To select the detection option, select
More (1/2) > Detectors
, and then do one of the following:
To display
Select
Random noise better than the peak without missing signals
Normal
The highest value in each data point
Peak
The root mean squared average power across the spectrum
RMS
The lowest value in each data point
Negative Peak
The center value in each data point
Sample
5
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.
6
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 is a common test used in the wireless industry to measure the total
transmitted power of a radio within a defined frequency channel. This procedure measures the total power
within the defined channel for WCDMA. This measurement is applied to design, characterize, evaluate, and
verify transmitters and their components or devices for base stations and mobile stations.
The channel power measurement identifies the channel power within a specified bandwidth (default is 5
MHz, as per the 3GPP WCDMA technical specifications) and the power spectral density (PSD) in dBm/Hz.
After configuring test parameters as described in the “Configuring test parameters” on page 173, your
measurement result is displayed on the screen as like the following example,
