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Using LTE/LTE-A TDD Analyzer
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NOTE
You can view detailed current resource block on the I-Q diagram, particularly in a dynamic field environment.
8 Tap Uplink-Downlink Config and select the number of uplink/downlink using the on-screen keyboard.
9 Optional. Tap Miscellaneous under Menu to do the following as needed.
a To select the number of antenna ports, tap the MIMO and select 2x2 or 4x4 .
b To assign a antenna port number automatically or manually, tap the Antenna Port under Antenna menu and select the
option: 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.
c To turn the Multimedia Broadcast Multicast Service ( MBMS ) feature on or off, tap MBMS and select On or Off . For proper
MBMS testing, you need to set the Subframe Number in the upper right screen with the same PMCH subframe number.
If this setting is on, the measurement item MBSFN RS appears in the result table.
d 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 ID appears on the screen.
e To set the delay, tap Delay and enter the value using the on-scre
en keyboard to set the amount of delay in μs.
NOTE:
The Delay setting is used only when there is a time offset in the signals to be measured.
f To select the Cyclic Prefix, tap Cyclic Prefix and select Normal or Extended .
g To set the threshold for PDSCH, tap PDSCH Threshold and enter a value by using the on-screen keyboard.
h Tap 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, E-TM1.2 or 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.
i Tap PDSCH Precoding to set On or Off to enable or disable the PDSCH precoding.
Setting limit
1 Tap Menu > Limit .
2 Tap to switch the Data EVM RMS/Data EVM Peak/IQ Origin Offset to set the Test limits to On or Off with setting High Limits
using the on-screen keyboard to enable or disable Pass/Fail indication.
Using marker
You can use Marker to place a marker on a resource block and display the IQ diagram for the selected resource block.
1 Tap Menu > Marker .
2 Tap RB Number to select the resource block to be marked and enter the resource block number using the on-screen keyboard.
The marker appears on the selected resource block.
3 Tap Marker View between On and Off to display or dismiss the result of the selected resource block.