Using Spectrum Analyzer
54
Spectrum emission mask (SEM)
The Spectrum Emission Mask (SEM) measurement is to identify and determine the power level of out-of band spurious emission
outside the necessary channel bandwidth and modulated signal. It measures the power ratio between in-band and adjacent
channels. The CellAdvisor 5G indicates either Pass or Fail based on the specified limit of the signal.
Setting measure setup
After configuring spectrum measurement in "
Configuring Spectrum Measurements
", you can set the measure setup to continue your
measurement. The measurement settings can be saved and recalled as a file by selecting File Type as Setup and load the file onto
the instrument using the
Save/Load
icons on the side bar.
1
Tap the
Setup
(
)icon on the side bar.
2
Tap
Configuration
to configure an offset, up to five. The below table appears.
You can also tap the
Configuration
(
) icon under the chart screen.
a
Select
Offset
from 1 to 5 and switch each to
On
to display or
Off
to hide the active offset.
b
Select
Offset Frequency
to set the start frequency of SEM using the on-screen keyboard.
c
Select
Measurement Bandwidth
to set the bandwidth for the selected offset using the on-screen keyboard.
d
Switch the
Reference
to
Relative
or
Absolute
depending on how to use the reference.
e
Select
Start Limit
to set the start point of the mask.
f
Select
Stop Limit
to set the stop point of the mask.
3
Tap
Main Channel BW
to set the main channel bandwidth and input the value using the on-screen keyboard.
You can also tap the rectangle with value,
under the chart screen and input the value using the on-
screen keyboard.
4
Tap
Menu
>
Sweep
>
Gated Sweep
to set the Gated Sweep
On
or
Off
. This function needs License S015.
Setting limit
1
Tap
Menu
>
Limit
.
2
Tap to switch the
Test Limits
to
On
or
Off
to enable or disable Pass/Fail indication.
The result table color for Pass is green, and the result table color for Fail is red.
3
Optional.
Tap the
Save
hot key on the side bar and select the save option form the choices available for your measurement
mode.
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