3 Short-Range Comms & IoT Mode
3.3 LoRa (CSS) Demodulation Measurement
n Return Value
15 This query returns the demod reference trace data as a list of x,y pairs. The x-axis values are in units of
seconds. The y-values are in units of Hz
If there is no stored reference trace or the reference trace is cleared, all y-values are -999.0
16 Returns the decimal values representing the demod bits (de-chirp bits) of the symbols starting from the
first preamble within the analyzed burst. The number of the symbols is the smaller number of the value of
the measure interval (Meas Setup -> Time) and the actual number of the symbols existing in the analyzed
burst. The decimal values of the headers’ demod bits are always multiples of 4 despite the state of the ppm
mode. For the other symbol types, the values are multiples of 4 when the ppm mode is ON. Otherwise, they
are not necessarily divisible by 4
17 This query returns the trace data of max-hold frequency drift vs symbols as a list of x,y pairs. The x-axis
values denote the index of the symbol (starting from the beginning of the preamble). The unit of y values is
Hz, indicating the max-hold frequency drift of each symbol
When averaging is Off, y values will be filled with -1 GHz
18 This query returns the trace data of min-hold frequency drift vs symbols as a list of x,y pairs. The x-axis
values denote the index of the symbol (starting from the beginning of the preamble). The unit of y values is
Hz, indicating the min-hold frequency drift of each symbol.
When averaging is Off, y values will be filled with 1 GHz
19 Returns the decoded bits of the payload and the CRC bits (if CRC bits exist)
3.3.1 Views
The views of this measurement are listed in the table below:
View Result
"Quad" on page 314 RF Spectrum Graph
Demod Waveform Graph
AF Spectrum Graph
Metrics
"RF Spectrum" on page 314 RF Spectrum Graph
Result Table
"Demod Waveform" on page 314 Demod Waveform Graph
Result Table
"AF Spectrum" on page 314 AF Spectrum Graph
Result Table
"Transient Analysis" on page 315 RF Envelope Graph
Raw Demod Waveform Graph
"Frequency Drift" on page 315 Frequency Drift vs Symbol
Result Table
Short Range Comms & IoT Mode User's &Programmer's Reference 313
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