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6 - 38 THE CPL PROTOCOL
Interpretation of waveform data
As a response to the QW command the oscilloscope sends a set of data describing
the waveform. The following example shows the interpretation of that data. The
example assumes the Probe Adjust signal to be applied to input channel 1.
For information about MATHPLUS, refer to the supplement for the operation guide.
EXAMPLE:
Settings Attenuator 200 mV/div
Coupling DC
Offset -1.5 div = -300 mV offset.
Time base 200 us/div
Delay -2.50 div = 500 us pre-trigger view
Display
The following definitions and formula’s that enable you to interpret the data above.
The same definitions, symbols and formula’s will be used to describe the discrete
mathematical functions of the MATH+ processing functions.
CH1 200mV
200µs
MTB
ch1
ST6994
−2.5dv
1−
SYMBOL PARAMETER VALUE TYPE
Yu Y-unit V string
Xu X-unit s string
Yz Y-zero 0.3 number
Xz X-zero -0.0005 number
Yr Y-resolution 3.125e-005 number
Xr X-resolution 4e-006 number
Yrng Y-range 65535 number
dT-corr dT-correction 4688E-04 number
N sample count 512 number
Y[1] sample 1 9603 binary
Y[2] sample 2 9612 binary
. . . . . . . . . . . . . . . . . .
Y[N] sample N -9599 binary
Data