Digital Demod Tab (Trace)

The Digital Demod tab in Trace adjusts parameters that affect how demodulated data is displayed. The following trace parameters can be adjusted:

Trace controls: At the top of the tab are controls for selecting, adding, and removing traces.
- Visible: Select the Visible check box to make the trace visible on the display; clear the check box to remove the trace from the display. When the trace is enabled, the following parameters can be set for the trace:
  Ideal State: chooses a circle or cross (or none) to indicate the location of ideal states. State size can be adjusted to change the size of the ideal states (in % 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.).
Code Order: selects Bit Reversed or Hadamard code order for the W-CDMA or cdma2000 Code Domain Power display.
Eye Length: determines the length of eye or trellis diagrams.
Filtered Channel Types: allows filtering of trace data by physical channel type when multiple channels are present in a trace.
Filtered SubSegments: allows filtering of layers and subsegments in a trace when multiple layers, subsegments, or a combination are present in a trace.
Frequency Unit: selects the x or z-axis frequency units that are applied to marker readouts for trace data results that use carrier information.
Show 2D Avg Line check box: shows the average line which overlays 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. subcarrier traces when the check box is selected. Disables the average line when cleared. The 2D average line shows the average of all values on the Z-axis for each X-axis location.
Symbol Table Bit Order: sets the bit order of hex values in symbol tables to MSB Most significant bit. In a binary coding scheme, the bit having the greatest numerical value. Analogous to the left-most numeric position in a decimal number. first or 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 or auto.
Symbol Table Format: selects binary or hexadecimal data for the symbol table.
Symbol Shape: selects a bars or dots (or none) to indicate symbol locations.
Time Unit: selects symbols or seconds as the time unit for time traces.