6-5 TD-LTE Over-the-Air (OTA) Measurements TD-LTE Signal Analyzer
6-18 PN: 10580-00234 Rev. T 3GPP MG
Tx Test
Tx Test measurements are optimized for remote radio heads and MIMO systems. The first
table in Tx Test replicates the Scanner table measurements, except the measurement scans
the presence of up to 3 cell IDs. The second table shows the RS power across all detected
antennas (transmitters) for the strongest Cell ID. This is displayed as average power and
delta power for the detected transmitters, along with a small bar graph that shows the
relative RS powers for each Tx. The PBCH Modulation Results table can also be turned on.
Mapping (Coverage Mapping)
Coverage Mapping allows users to measure and map Sync Signal Power, Reference Signal
Received Power (RSRP), Reference Signal Receive Quality (RSRQ) and SINR. It is the same
measurement as in Scanner which scans for the presence of up to 6 cell IDs but only displays
the presence of up to 3 cell IDs. For full details regarding Coverage Mapping set up and
testing, refer to Chapter 7, “LTE and TD-LTE Coverage Mapping”.
Carrier Aggregation
This measurement displays a table of up to five Component Carriers (CC) used in Carrier
Aggregation and their measured signal components.
Frequency
This is the set center frequency.
Bandwidth (BW)
This is the set bandwidth of the Component Carrier.
Cyclic Prefix (CP)
The length of Cyclic Prefix can be specified as either Normal or Extended.
MIMO
The MIMO status indicators show which transmitters are active in a MIMO configuration.
Active transmitters display as a green dot, inactive as grey. They correspond to the antenna
icons shown at the bottom left of the screen for each Component Carrier scanned.
Reference Signal (RS) Power
Reference Signal power is displayed in dBm or Watts. The reference signal is used for
downlink channel estimation.
RS Delta Power
RS Delta Power shows the maximum relative power difference in dB between the RS powers
of the MIMO signals and can be used to check correct MIMO configuration.
Sync Signal (SS) Power
Sync signal power is displayed in dBm or Watts.
EVM (rms)
The RMS (%) of all the error vectors, between the reconstructed ideal signals and the received
signals, divided by the RMS value of the ideal signals.
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