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10 Tap PDSCH, and then select the PDSCH modulation type option: Auto, QPSK,
16 QAM, 64 QAM, 256 QAM, LTE E-TM3.3, LTE E-TM3.2, LTE E-TM3.1a, LTE
E-TM3.1, LTE E-TM2a, LTE E-TM2, LTE E-TM1.2 or LTE E-TM1.1.
If two or more modulation types are used in a frame, select Auto. If the PDSCH
uses the same modulation type in a frame or in a subframe, select a specific
modulation type to get more accurate EVM.
11 Tap PDSCH Threshold to set the threshold for PDSCH and enter a value by
using the on-screen keyboard.
12 Tap PDSCH Precoding to set On or Off to enable or disable the PDSCH
precoding.
13 Tap EVM Detection Mode to set Combine or Single.
–
–
14 Tap to switch Select Half Block to Second or First.
If you set First, it will show the average value of Subframe 1 to 4 and Second it will
show the average value of subframe 5 to 9.
15 Tap Menu > Display and select Reset to refresh your measurement screen.
You can check the EVM Peak is changed at the right bottom of the measurement
screen when you tap Reset.
To set the limit
1
Tap Menu > Limit.
2
Tap NR Limit and set the limits depending on your selected measurement mode:
To set the limit for
Frequency error
PDSCH EVM
Data EVM RMS
Data EVM Peak
P-SS EVM
S-SS EVM
P-SS Power
April 2021
Combine: Testing on multiple antennas connected to your SPA06MA-O
series with a 2x1 or 4x1 combiner or an antenna
Single: Testing on one single antenna connected to your SPA06MA-O series
with a cable
Set
Test limits On/Off, High/Low Limit
Test limits On/Off, High Limit for QPSK, 16 QAM, 64 QAM,
256 QAM
Test limits On/Off, High Limit
Test limits On/Off, High Limit for QPSK, 16 QAM, 64 QAM,
256 QAM
Test limits On/Off, High Limit
Test limits On/Off, High Limit
Test limits On/Off, High/Low Limit
Note that based on the Reference Mode you have chosen
from Menu > Reference Mode between Absolute and
Relative, you can set the first high/low limit when you
chose absolute, and second high/low limit when you chose
relative.
SPA06MA-O User's Guide
22145360, R005
Chapter 9 Using 5G DSS Signal Analyzer
Conducting modulation measurements
Page 323
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