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Chapter 9 Using 5G DSS Signal Analyzer
Conducting OTA measurement
3
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:
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–
–
–
•
When NR is selected as Technology, do the following steps:
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4
Tap Antenna Port to assign an antenna port number automatically or manually,
and select from Auto, Antenna 0, Antenna 1, Antenna 2, or Antenna 3.
If the MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
5
Tap to switch CFI to Manual or Auto.
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–
–
6
Tap CFI and input a value from 1 to 3 as desired using the on-screen keyboard.
7
Tap SSB frequency and input the value using the on-screen keyboard.
8
Tap GSCN and input the value from 2 to 26639 using the on-screen keyboard. If
you need to search SSB based on ARFCN raster, it would take too long time
since ARFCN raster is very narrow. Therefore, it is recommended that you define
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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.
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Normal: Intended to be sufficient for the majority of scenarios
Extended: Intended for scenarios with particularly high delay spread
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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.
Auto lets the instrument set the number of OFDM symbols used for transmit-
ting PDCCHs in a subframe.
Manual sets the number of OFDM symbols manually.
The set of OFDM symbols that can be used for PDCCH in a subframe is
given by 0, 2, 3 or 4 in 1.4 MHz bandwidth and 1, 2 or 3 in other bandwidths.
SPA06MA-O User's Guide
22145360, R005
April 2021
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