Available Error Summary Data (NB-IoT)
contains information about the quality of the signal being analyzed (in the Measurement Interval). Below is a list of available data results. Click the name of a data result for more information.
Only and are calculated from the channels that are selected for analysis in the Composite Include list on the Profile tab. The other data results are not dependent on which channels are selected for analysis.
- Cell ID - The physical-layer Cell ID of the signal. If Auto is selected, (auto) will display to the right of the status.
- Channel Power - Average power of the NB-IoT signal
- Common Tracking Error - RMS average of the correction applied to each symbol by EVM Minimization
- Data EVM - RMS Error Vector Magnitude of the user channels
- EVM - Overall RMS Error Vector Magnitude for all selected channels
- EVM Pk - The peak EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format. value and location of the peak EVM
- Freq Err - Average carrier frequency error
- IQ Gain Imbalance - I vs Q amplifier gain imbalance (ratio of I-gain to Q-gain)
- IQ Offset - Magnitude of carrier feedthrough
- IQ Quad. Error - Amount of angle skew between I and Q
- IQ Timing Skew - Time difference between the I and Q parts of the signal
- N-TM Signal - True or false status of whether the signal is an N-TM (narrowband test model) signal. If Auto N-TM Signal is selected, (auto) will display to the right of the status.
- OFDM Sym. Tx. Power - Average power (dBm deciBels referenced to a milliWatt: dB relative to 1 milliwatt dissipated in the nominal input impedance of the analyzer) for OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. data subcarriers, can be used to calculate OSTP as defined in the LTE standard
- RS EVM - RMS Error Vector Magnitude of the reference signal
- RS Rx. Power (Avg) - Average narrowband Reference Signal "Received" Power (dBm), can be used to calculate RSRP as defined in the LTE standard
- RS Rx. Quality - Narrowband RS Receive Quality, can be used to calculate RSRQ as defined in the LTE standard
- RS Tx. Power (Avg) - Average (dBm) reference signal power, can be used to calculate RSTP as defined in the LTE standard
- RSSI - Received Signal Strength Indicator
- SyncCorr - Correlation between the measured NPSS signal and the reference NPSS signal
- SymClk Err - Frequency error of the measured signal's symbol clock
- Time Offset - The distance from the start of the Search Time trace to the beginning of the Measurement Interval
See Also
