3 Short-Range Comms & IoT Mode
3.3 LoRa (CSS) Demodulation Measurement
Burst Length Represents the time duration of the analyzed burst
Payload
Length
Represents the time duration of the payload in the analyzed burst. This is calculated by subtracting the
preamble length from the burst length. Since the value of the preamble length is calculated based on the
measurement settings rather than the measurement results, it could be possible that the payload length
is less than 0 after the calculation under some circumstances. In such a case, ‘---' is displayed
Pmbl. Length Represents the time duration of the preamble in the analyzed burst. This value is calculated based on the
settings (the spreading factor, the bandwidth, the programmed preamble length, etc.) on the panel of the
Demod tab under Meas Setup
Frequency
Drift RMS
Represents the RMS value calculated based on all the points of the frequency drift trace
Frequency
Drift Pk+
Represents the maximum value on the frequency drift trace
Frequency
Drift Pk-
Represents the minimum value on the frequency drift trace
Frequency
Drift Pk+ Max
Hold
Represents the max hold maximum value on the frequency drift trace when the average is set On. ‘---' is
displayed when the average is Off
Frequency
Drift Pk- Min
Hold
Represents the min hold minimum value on the frequency drift trace when the average is set On. ‘---' is
displayed when the average is Off
3.3.2.9 Demod Bits
This table displays the demod bits (de-chirp bits) of the symbols starting from the
first preamble symbol within the analyzed burst. The number of the symbols being
displayed 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.
Short Range Comms & IoT Mode User's &Programmer's Reference 323
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