Tektronix MSO4000B Series Technical Reference

Specifications
Table 2: Horizontal and acquisition system specifications (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
insignificant signal content above Nyquist and insignificant 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
)(RefertoRandom Noise and Sample Acquisition Mode
specifications.)
TBA = time base accuracy (5 ppm) (Refer to Long-term Sample Rate and Delay Time
Accuracy specifi 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 filter response
Delta-time m
easurement
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 first single-shot measurement to the final single-shot measurement).
Table
3: Delta-Time measurement accuracy formula
The terms used in these formulas are defined under Delta-time measurement accuracy, in the preceding table. (See Table 2.)
MSO4000B and DPO4000B Series Specifications and Performance Verification 11

Tektronix MSO4000B Series Specifications

General

Brand	Tektronix
Model	MSO4000B Series
Category	Test Equipment
Language	English