Scanner, Tx Test, Mapping, and Carrier Aggregation are measurements taken over the air. EMF measurements are available only with Option 444.

The Antenna Status indicators, if any, are located in the bottom left corner of the instrument display. They show the number of antennas detected and which one is currently being measured. In OTA measurements, the Antenna Status is displayed when Show Mod Results is On for Scanner and Tx Test.

The Scanner measurement scans for the presence of up to 6 cell IDs and the following measurement values.

Identifying information sent by the transmitter in the sync signal.

Secondary Sync Signal power is displayed in dBm or Watts. The secondary sync signal is used to obtain frame synchronization and cell identity. S‑SS Power contains information needed for cell search.

Reference Signal Received Power is the average power of Resource Elements (RE) that carry cell-specific Reference Signals (RS) over the entire bandwidth.

Reference Signal Received Quality provides additional information when RSRP is not sufficient to make a reliable handover or cell reselection decision. RSRQ is the ratio between RSRP and RSSI measured in dB.

Signal‑to‑Interference-plus-Noise Ratio is measured in dB.

Dominance is the ratio of the power for the largest signal to the sum of all other signals found, measured in dB.

The PBCH Modulation Results table is displayed when the Show Mod Results setting is set to On. Refer to OTA Scanner Menu. The displayed values are the same as described under Constellation.

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.

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 setup and testing, refer to LTE and TD‑LTE Coverage Mapping.

This measurement displays a table of up to five Component Carriers (CC) used in Carrier Aggregation and their measured signal components.

This is the set center frequency.

This is the set bandwidth of the Component Carrier.

The length of Cyclic Prefix can be specified as either Normal or Extended.

Multiple input, multiple output technology, or spatial multiplexing, uses two or more simultaneous RF transmission paths to improve signal performance. In 2x2 MIMO, for example, the overall bitrate increases through transmission of different data streams from two TX antennas to two RX antennas on the same frequency and time, but different reference signals. Your Anritsu test instrument supports 2x2 and 4x4 MIMO configurations. Note that 4x4 MIMO may not be available if your instrument is loaded with older firmware. Refer to your instrument User Guide for instructions on updating firmware.

The MIMO status indicators on the instrument screen show which transmitters are active. See Figure: Over‑the‑Air Carrier Aggregation Measurement. There are two icons in a 2x2 MIMO configuration, four icons if 4x4 MIMO signals are detected. Active transmitters display as green dots. Inactive transmitters are gray. They correspond to the antenna icons displayed at the bottom left of the screen for each Component Carrier scanned.

Reference Signal power is displayed in dBm or Watts. The reference signal is used for downlink channel estimation.

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 power is displayed in dBm or Watts.

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.

The peak (%) of all the error vectors, between the reconstructed ideal signals and the received signals, divided by the RMS value of the ideal signals.

This is the difference between the measured carrier frequency and the specified carrier frequency. This number is only as accurate as the frequency reference that is used, and is typically only useful with a good external frequency reference or GPS.

This is the frequency error displayed in parts per million.

Time Alignment Error (TAE) is a measurement of the differential transmission delay between the Component Carriers. The 3GPP specification identifies the limits of the delays for the system to operate properly.

Cell identifying information sent by the transmitter in the sync signal.

 

Refer to LTE and TD‑LTE Coverage Mapping.

Your Anritsu test instrument supports single-input single-output (SISO) as well as 2x2 and 4x4 multiple-input multiple-output (MIMO) systems. If a single antenna is active, the Component Carrier measurements illustrated in Figure: Over‑the‑Air Carrier Aggregation Measurement are aggregated from the entire modulated contents of the LTE signal. When two or more antennas are active, the measurement results displayed represent the QPSK modulated signal on the Physical Broadcast Channel (PBCH).