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Time alignment error
In eNode-B supporting Tx Diversity transmission, signals are transmitted from two or
more antennas. These signals shall be aligned.
The time alignment error in Tx diversity is specified as the delay between the signals
from two antennas at the antenna ports.
Setting measure setup
After configuring the spectrum measurement in
on page
measurement 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 bar.
To set measure setup
1
Tap the Setup (
2
Tap Bandwidth and select the value from the following choices: 1.4 MHz, 3 MHz,
5 MHz, 10 MHz, 15 MHz, or 20 MHz.
3
Optional. Tap Physical Cell ID and select the type Manual or Auto.
–
–
4
Optional. To select the number of antenna ports, tap the MIMO and select 2x2 or
4x4.
5
To assign an antenna port number automatically or manually, tap Menu >
Antenna Port and select the options 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.
6
To set the delay, tap Delay and enter the value using the on-screen keyboard to
set the amount of delay in μs.
7
To select the Cyclic Prefix, tap Cyclic Prefix and select Normal or Extended.
To set limit
1
Tap Menu > Limit.
April 2021
9, you can set the measure setup to continue your measurement. The
) icon in the side bar.
Auto lets the instrument detect the Physical Cell ID for the LTE signal auto-
matically.
Manual sets a specific Physical Cell ID for the LTE signal manually in order to
speed up with the synchronization with a BTS.
NOTE
The Delay setting is used only when there is a time offset in the signals to be
measured.
SPA06MA-O User's Guide
"Configuring spectrum measurements"
22145360, R005
Chapter 6 Using LTE/LTE-A TDD Analyzer
Conducting modulation measurement
Page 163
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