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Chapter 6 Using LTE/LTE-A TDD Analyzer
Conducting OTA measurement
9
Tap Menu > Miscellaneous and do the following as needed.
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10 Tap Menu > Antenna.
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Figure 95
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To select the number of antenna ports, tap MIMO and select 2x2 or 4x4. The
instrument sets this option to 2x2 by default. A 2x1 or 4x1 RF combiner is
also required to able to test on MIMO channels.
To turn the Multimedia Broadcast Multicast Service (MBMS) feature on or off,
tap to switch MBMS and select On or Off.
To set the Multicast Broadcast Single Frequency Network (MBSFN) detection
automatically or manually for MBMS testing, tap MBSFN and select Auto or
Manual. An automatically detected or manually entered MBSFN Number
appears on the Top Info.
To select the cyclic prefix, tap Cyclic Prefix and select Normal or Extended.
Tap the PDSCH Modulation Type, and then select the modulation type
option: Auto, QPSK, 16 QAM, 64 QAM, 256 QAM, E-TM3.3, E-TM3.2, E-
TM3.1a, E-TM3.1, E-TM2a, E-TM2, and E-TM1.2.
Tap PDSCH Threshold and input the value using the on-screen keyboard.
Tap PDCCH Threshold and input the value using the on-screen keyboard.
Tap PDCCH Mode and select REG to calculate EVM based on Resource
Element Group or Average to calculate EVM after adding up all the PDCCH
signals from one subframe.
Tap to switch PDSCH Precoding between On and Off to enable or disable
the PDSCH precoding.
To assign a antenna port number automatically or manually, tap Antenna
Port and select the option: Auto, Antenna 0, Antenna 1, Antenna 2, and
Antenna 3. If the MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
NOTE
If you want to set the reference level and scale, tap Menu > Amp/Scale > Ref-
erence. You can set Reference Freq Error Offset, Scale Division (Freq Error),
Reference Time Error Offset, Scale Division (Time Error), Reference Level,
and Scale Division (Power) on demand using the on-screen keyboard. You can
also select the unit on the keyboard.
shows an example of LTE/LTE-A TDD freq/time/power variation by offset.
SPA06MA-O User's Guide
22145360, R005
April 2021
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