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Chapter 9 Using 5G DSS Signal Analyzer
Conducting OTA measurement
OTA channel scanner
The Channel Scanner is a radio receiver that can automatically tune or scan two or
more discrete frequencies and multi-channels, indicating when it finds a signal on one
of them and then continuing scanning when that frequency goes silent.
Setting measure setup
After configuring spectrum measurement in
page
9, you can set the measure setup to continue your measurement. The measure-
ment 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 bars.
To set measure setup
1
Tap the Setup (
2
Tap to switch Radio Config and set Duplex Type (FDD/TDD), DSS Type (Co-
channel) and Technology (LTE/NR) and other related parameters as below:
You can select Co-channel to find NR frequency based on the LTE operating
frequency in co-channel and select Adjacent channel to search both LTE and NR
frequency. Note that Adjacent channel will be available in the next release.
•
When LTE is selected as Technology, do the following steps:
–
–
–
–
•
When NR is selected as Technology, do the following steps:
–
Page 328
) icon in the side bar.
Select Bandwidth (MHz) from the following choices: 20, 15, 10, or 5.
Select MIMO between 2x2 and 4x4 to set the number of antenna ports. If the
MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
Select Cyclic Prefix between Normal and Extended. Cyclic prefix works as
a buffer region or guard interval to protect the OFDM signals from inter
symbol interference.
Normal: Intended to be sufficient for the majority of scenarios
-
Extended: Intended for scenarios with particularly high delay spread
-
Select PHICH Ng between Normal and Extended and then to set the
number of PHICH groups (Ng): 1/6, 1/2, 1, or 2. The PHICH group value/Ng
is decided based on the number of PHICH groups per subframe. PHICH
duration is a higher layer parameter configured either as Normal or Extended
that says the demodulator how many symbols per subframe are used by
PHICH.
-
Normal: There are 8 PHICH sequences in one PHICH group (4
symbols).
-
Extended: There are 4 PHICH sequences in one PHICH group (2
symbols)
Select sub-Carrier Spacing as 15 kHz (Case A). The standard for NR SCS is
15 kHz. The instrument supports 15 kHz of sub-carrier spacing.
SPA06MA-O User's Guide
"Configuring spectrum measurements" on
22145360, R005
April 2021
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