LTE Demod Summary

LTE demod summary measurement is the default measurement in LTE analyzer mode. To select demod summary measurement go to main menu and press MEASURE > MEASUREMENT >Demod Summary. LTE demod summary measurements are used for compliance testing of 3GPP LTE networks and can evaluate active antenna systems for dynamic physical layer attributes and received power levels of the transmitted signal.

LTE FDD Demod Summary Measurement

1. LTE Analyzer Status Panel: Each measurement features a unique status panel that displays settings and information relevant to the current measurement and view settings. This panel provides quick access to the MIMO antenna selection and status, sweep setting, and frequency and bandwidth configuration. See Status Panel (LTE Demod Summary). 2. PCI Summary: This area shows the physical cell ID, including the sector ID, cell group number, frequency error, time offset, and sync status. Sync status can indicate if there is a PSS or SSS failure, a Full Sync, or an Unknown condition. Also noted is the instrument’s reference clock accuracy of Internal, External, or GNSS (GPS) high accuracy (requires GPS). 3. Power Summary: Shows the received power for each of the following: • PBCH: Physical broadcast channel, the main purpose of which is to carry the broadcast information block. • SS: Synchronization signal is used as a preamble sequence in LTE for synchronization purposes. • RS: Reference signal is used as a pilot subcarrier for channel estimation and tracking in LTE. • RS (0 through 3): Reference signal power of each of the MIMO antennas. 4. EVM Summary: Shows the RMS (%) of the error vectors between the reconstructed ideal signals and the received signals, divided by the RMS value of the ideal signals. The first column lists the average EVM (rms) value and the second column lists the peak measured value for each of the following as they are received: • PBCH (QPSK): Physical broadcast channel, the main purpose of which is to carry the broadcast information block. • PDSCH (QPSK): Physical downlink shared channel (quadrature phase shift keying). • PDSCH (16-QAM, 64-QAM, 256-QAM): Physical downlink shared channel (quadrature amplitude modulation; 16, 64, and 256 states).

LTE Time Alignment Error (TAE) Measurement

1. LTE Analyzer Status Panel: Each measurement features a unique status panel that displays settings and information relevant to the current measurement and view settings. This panel provides quick access to the MIMO antenna selection and status, sweep setting, and frequency and bandwidth configuration. See Status Panel (LTE Demod Summary). 2. PCI SUMMARY: This area shows the physical cell ID, including the sector ID, cell group number, frequency error, time offset, and sync status. Sync status can indicate if there is a PSS or SSS failure, a Full Sync, or an Unknown condition. Also noted is the instrument’s reference clock accuracy of Internal, External, or GNSS (GPS) high accuracy (requires GPS). 3. Time Alignment Error: Measures the delay between the signals from two antennas at the antenna ports. 4. Power and EVM: Measures the power of the reference and secondary sync signals, and the PBCH peak and RMS EVM. (EVM will only display for specific antenna combinations of {0}, {0,1}, {0,1,2,3}. All other combinations will display a blank EVM value.)

LTE Resource Block (RB) Power Measurement

1. LTE Analyzer Status Panel: Each measurement features a unique status panel that displays settings and information relevant to the current measurement and view settings. This panel provides quick access to the MIMO antenna selection and status, sweep setting, and frequency and bandwidth configuration. See Status Panel (LTE Demod Summary). 2. PCI Summary: This area shows the physical cell ID, including the sector ID, cell group number, frequency error, time offset, and sync status. Sync status can indicate if there is a PSS or SSS failure, a Full Sync, or an Unknown condition. Also noted is the instrument’s reference clock accuracy of Internal, External, or GNSS (GPS) high accuracy (requires GPS). 3. Resource Block: Shows the number of active resource blocks, utilization (%), and the OFDM Symbol Transmit Power (OSTP) in dBm. 4. EVM: Shows the RMS (%) of the error vectors between the reconstructed ideal signals and the received signals, divided by the RMS value of the ideal signals for the average signal, QPSK, 16-QAM, 64-QAM, and 256-QAM.

LTE Demod Summary Table View

1. Status Panel: Each measurement features a unique status panel that displays settings and information relevant to the current measurement and view settings. This panel provides quick access to the measurement frequency, channel bandwidth, and Frequency Error Type. See Status Panel (LTE Demod Summary). 2. SUMMARY TABLE: This field indicates the current beam summary page. • Carrier Frequency: The sum of center frequency and frequency error. • Average Frequency Error: The average value of the frequency error of all the measurements. Frequency error is the difference between the received center frequency and the specified center frequency. This is tied to external frequency reference accuracy and is typically useful only with a good external frequency reference. To view current frequency error, select CURRENT from FREQ ERROR TYPE drop-down in the status panel/SETUP menu. • Channel Power: The total power transmitted within a specified frequency or channel bandwidth. • RS Power: The reference signal received power measured in dBm. • Occupied BW: The bandwidth containing 99% of the total integrated power within the transmitted spectrum around the selected center frequency. • Physical Cell ID: The physical-layer cell ID value.

LTE SETUP Menu (LTE Demod Summary Measurement)
-	ANTENNA Sets the MIMO antenna number (0 to 3, or AUTO) to use during a measurement. AUTO will use the antenna with the highest received signal power. CYCLIC PREFIX Sets the cyclic prefix (or guard time interval) to Normal, Extended, or Auto. The cyclic prefix is a duplication of a fraction of the symbol end. This setting affects the OFDM symbol sensitivity to time dispersion. DUPLEX TYPE Selects either frequency division duplex (FDD) or time division duplex (TDD). UL/DL CONFIG Available only in TDD duplex type. Sets the uplink/downlink (UL/DL) configuration, or Frame Format. This selection determines which sub-frames are uplink sub-frames and which are downlink sub-frames, and where the transitions between uplink and downlink sub-frames occur. CFI Selects the control format indicator (CFI) which indicates how many OFDM symbols are used for carrying the control channel at each sub-frame. CFI1 uses the first symbol at the sub-frame for PDCCH allocation. CFI2 uses the first and the second symbol for PDCCH. CFI3 uses the first three symbols for PDCCH. DSS DETECT Detects the Dynamic Spectrum Sharing (DSS) signal when turned On. This toggle only applies to FDD duplex type. SSB OFFSET SSB is the synchronous signal block. The SSB offset sets the frequency offset between the SSB and the center frequency of the channel. Negative values result in an offset lower than the center frequency. Positive values result in an offset higher than the center frequency. AUTO DETECT SSB OFFSET When DSS DETECT is toggled On, automatic detection of the SSB Offset is enabled. FREQUENCY ERROR TYPE Selects the frequency error type as either current or average. Shows the current frequency error value when CURRENT is selected. Shows the average of frequency error of all the measured channels. Note that this is only available in LTE Demod summary table view. PRESET SETUP Presets the SETUP menu to default settings.

Many operators are currently supporting 5G in existing sub 2.5 GHz bands using dynamic spectrum sharing (DSS). DSS technology allocates spectrum resources between LTE and 5G technologies in an LTE frame structure, and is often implemented with a software update to existing LTE radios and antennas. These network deployments usually implement traditional base station and antenna architectures with RF cable feeds between the two components. For this reason, tower crews must implement comprehensive RF cable testing during 5G network deployment and installation and maintenance (I&M).

Status Panel with Minimized Icons (LTE Demod Summary Measurement)
	MIMO ANTENNAS: Toggles the current MIMO antenna setting between AUTO or to select one of the available antennas. When a single antenna is selected, a blue underscore will appear below the antenna icon. The antenna icon is highlighted green when receiving a signal. DSS: Displays the status of the detected DSS signal, in addition to PCI, BEAM, SS-RSRP values. SWEEP: Toggles the current sweep setting between continuously or sweep once. SWEEP ONCE When sweep is set to single sweep, SWEEP ONCE updates the measurement display. Data continues to be captured in the background. RESTART AVERAGING Restarts the average frequency error value of the all the frequency measurements made. REF LEVEL Sets the reference level of the top graticule line in the selected units. If the reference level offset is not zero, OFFSET REF LEVEL is displayed at this location. Refer to Setting Amplitude. SCALE/DIV Sets the graticule scale/division for log-based units. This setting does not apply to linear units. FREQUENCY ERROR TYPE Selects the frequency error type as either current or average. Shows the current frequency error value when CURRENT is selected. Shows the average of frequency error of all the measured channels. Note that this is only available in LTE summary table view. CHANNEL BW Sets the measurement channel bandwidth. CENTER FREQUENCY Sets the center frequency of the measurement channel. ATTEN LEVEL When auto attenuation is off, sets input attenuation. PRE AMP Toggles the low-noise front-end preamplifier on or off. Refer to Setting Amplitude. FREQ REFERENCE Indicates the current frequency reference source of Internal, External, or GNSS (GPS) Hi Accuracy (requires GPS). The instrument automatically selects the frequency reference in the following order of priority: external, GNSS (GPS), then the internal time base.


	Anritsu Company 1-800-ANRITSU 10450-00078, Rev. A