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JD700B Series User’s Guide
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.
Measurement example
Figure 401 Spectrum measurement with RFoOBSAI LTE-FDD signal analyzer
Conducting channel power measurement
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, transforms 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.
Making a measurement
Procedure
1
Press the
MEASURE
hot key to select the measurement mode.
2
Select
Signal Analyzer > LTE-FDD > RF Analysis > Channel Power
.
3
Configure test parameters as described in the “Configuring test parameters” on page 669.
4
Press the
MEASURE SETUP
hot key and set the measurement setups as described in the
“Setting measure setup” on page 671.
5
Check your measurement result displayed on the screen.
6
To clear current (C) and history (H) status of OBSAI alarm on LOS and LOF and start a new
monitoring, press the
MEASURE SETUP
hot key and then the
Clear History
soft key.
7
Optional
. Go to
SAVE/LOAD > Save
, and then select the save option from the choices available
for your measurement mode. See “Using save” on page 35 for more information.