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Chapter 6 Using LTE/LTE-A TDD Analyzer
Conducting RF measurement
SPA06MA-O User’s Guide
April 2021 22145360, R005 Page 137
Conducting RF measurement
The following sections describe how to conduct RF analysis.
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. It
acquires a number of points representing the input signal in the time domain, trans -
forms this information into the frequency domain using Fast Fourier Transform (FFT),
and then calculates the channel power. The effective resolution bandwidth of the
frequency domain trace is proportional to the number of points acquired for the FFT.
The channel power measurement identifies the total RF power and power spectral
density (PSD) of the signal in the LTE channel bandwidth.
Setting measure setup
After configuring the spectrum measurement in “Configuring spectrum measurements”
on page 9 , you can set the measure setup to continue your measurement.
To set measure setup
1 Tap the Setup ( ) icon in the side bar.
2 Tap Bandwidth and select the value from the following choices: 1.4 MHz , 3 MHz ,
5 MHz , 10 MHz , 15 MHz or 20 MHz .
You can also tap the rectangle with value,( ) under
the chart screen and input the value using the on-screen keyboard.
3 Tap the Center Frequency ( )icon under the chart
screen to set the center frequency using the on-screen keyboard.
4 Tap Subframe Number and input the value from 0 to 9 using the on-screen
keyboard.
5 Tap to switch Physical Cell ID to Manual or Auto .
– Auto lets the instrument detect the Physical Cell ID for the LTE signal auto -
matically
– Manual sets a specific Physical Cell ID for the LTE signal manually in order to
speed up the synchronization with a BTS.
6 If you set the Physical Cell ID to Manual, tap Physical Cell ID and input the value
using the on-screen keyboard.
7 Tap Menu > BW/AVG > Average to set the number of measurements to be aver -
aged using the on-screen keyboard.The input value range is from 1 to 100.
To set limit
1 Tap Menu > Limit .