Speci
fi
cations
Table 2: Horizontal and acquisition system speci
fi
cations (cont.)
Characteristic
Description
The formula to calculate the delta-time measurement accuracy (DTA) for a given instrument
setting and input signal is given in the following table. (See Table 3.) The formula assumes
insigni
fi
cant signal content above Nyquist and insigni
fi
cant error due to aliasing. The
abbreviations used in the formula are as follows:
SR
1
= slew rate around 1st point in measurement (1
st
edge)
SR
2
= slew rate around 2nd point in measurement (2
nd
edge)
N =input-referred noise (V
RMS
) (Refer to
Random Noise
and
Sample Acquisition Mode
speci
fi
cations.)
TBA = time base accuracy (5 ppm) (Refer to
Long-term Sample Rate
and
Delay Time
Accuracy
speci
fi
cations.)
t
p
= delta-time measurement duration (sec)
RD = (record length)/(sample rate)
t
sr
= 1/(sample rate)
assume edge shape that results from Gaussian
fi
lter response
Delta-time measurement
accuracy
The term under the square-root sign is the stability and is due to TIE (Time Interval Error). The
errors due to this term occur throughout a single-shot measurement. The second term is due
to both the absolute center-frequency accuracy and the center-frequency stability of the time
base and varies between multiple single-shot measurements over the observation interval (the
amount of time from the
fi
rst single-shot measurement to the
fi
nal single-shot measurement).
Table 3: Delta-Time measurement accuracy formula
The terms used in these formulas are de
fi
ned under
Delta-time measurement accuracy
, in the preceding table. (See Table 2.)
MSO4000B and DPO4000B Series Speci
fi
cations and Performance Veri
fi
cation
11
Содержание DPO4000B Series
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