Chapter 8
Using LTE-FDD Signal Analyzer
JD700B Series User’s Guide
267
Setting display
You can use the
TRACE/DISPLAY
hard key to select the display option.
Procedure
1
Press the
TRACE/DISPLAY
hard key.
2
Toggle the
Display
soft key and select
Power
or
EVM
.
The screen changes according to the selected option.
Measurement example
Figure 148 Control channel measurement with LTE-FDD OTA signal analyzer
Datagram
The OTA Datagram is a time-varying spectral representation that shows how the power of a signal varies
with time. The power allocated to the specific resource block will be represented with an amplitude axis (in
dBm) and the waterfall diagram will show the trend of past resource block power over certain period. Using a
marker function facilitates analysis of accumulated resource block power for data utilization.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 214, 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
To set the nominal channel bandwidth to be measured, complete the following steps:
Press the
Bandwidth
soft key.
Select the bandwidth option from the choices:
1.4 MHz
,
3 MHz
,
5 MHz
,
10 MHz
,
15 MHz
,
and
20 MHz
.
3
To select the subframe number to be measured, complete the following steps: