Anritsu 3GPP, Measurement Manual

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6-3 TD-LTE RF Measurements TD-LTE Signal Analyzer
6-2 PN: 10580-00234 Rev. Y 3GPP MG
Antenna Status
The Antenna Status indicator can show when antennas are detected and which one is
currently being measured. Antenna Status is displayed for any EVM measurement shown:
Constellation, Control Channel Power, Modulation Summary and LTE Summary. The
antennas icons are displayed at the lower-left corner of the display screen (
Figure 6-1 ).
6-3 TD-LTE RF Measurements
The following parameters are measured in the RF Measurement mode.
Channel Spectrum
Channel Spectrum displays the spectrum of the input signal across one channel. The Channel
Power and Occupied BW are computed and displayed below the graph.
Channel Power
Channel power measures the average power within the selected bandwidth and is expressed
in dBm or Watts.
Occupied BW
The measured occupied bandwidth is calculated as the bandwidth containing 99% of the total
integrated power within the selected span around the selected center frequency.
Power vs. Time
Power vs Time displays the power of the received signal in the time domain. A submenu
allows the user to toggle between viewing 1 full Frame and 1 Sub-Frame and specify a
Sub-Frame number when viewing just the Sub-Frame.
Sub-Frame Power
Power of each sub-frame in dBm or Watts.
Total Frame Power
Average power of the 10 sub-frames in dBm or Watts.
DwPTS Power
The power of the Downlink Pilot Time Slot in Sub-Frame 1 in dBm or Watts.
Transmit Off Power
The mean power measured over a 70
μ
s window in the transmitter OFF period.
Figure 6-1. Antenna Status
No Signal
Single Antenna (Tx1, Tx2, Tx3, or Tx4)
Two to Four Antennas (Tx Diversity)