Syms/Errs (802.11n/ac/ax/be)

The Syms/Errs trace data shows the symbol table trace data for all streams 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. demodulation. The symbol table also shows error summary data specific to the selected data stream as well as the raw binary bits for the data symbols, which follow the preamble.

The descriptions for metrics in the Error Summary table apply to the metrics in the Syms/Errs table, except that the Error Summary shows values calculated over all streams and the Syms/Errs table shows values calculated over a particular stream. The topic Available Error Summary Data Results contains a list of metrics with links to descriptions (remove the "Strm" prefix to find the corresponding metric in the Error Summary metric descriptions).

By default, the bits are displayed in LSB Least Significant Bit: In a binary coding scheme, the bit having the least numerical value. Analogous to the units position in a decimal number.-first order, meaning the first digit is interpreted as the least significant bit in a hexadecimal digit. You can switch to showing the hex digits as MSB-first by changing the Trace > Digital Demod > Symbol Table Bit Order property (Hex format only).

When there are varying bits per symbol (e.g., the HE_BW80_RU484-26-106-26-106-106-26-106-SIGB demo signal), the bits per symbol in the Syms/Errs trace is set to the maximum bits per symbol present.

To change the symbol data color, click Utilities > Display Preferences > Color and select a new color for the active Mod Type Element. The default colors are:

Magenta for BPSK Binary phase shift keying - A type of phase modulation using 2 distinct carrier phases to signal ones and zeros. (Mod Type 1)
Red for QPSK Quadrature phase shift keying (Mod Type 2)
Blue for 16 QAM Quadrature Amplitude Modulation (Mod Type 3)
Green for 64 QAM (Mod Type 4)
Yellow for 256 QAM (Mod Type 5)