Appendix C: Operator Performance Check
Sequential Sampling Rate Check
Sequential Sampling Rate Check
The sequential sampling rate is the reciprocal of the pulse repetition time.
Vertical Scale Check
Vertical Scale Check
Twist the
VERTICAL SCALE
knob clockwise. Vertical scale should drop to 0.5mρ and the trace
should expand accordingly.
Vertical Accuracy Check
Vertical Accuracy Check
1) Attach a 50 Ω precision terminator to the CT100.
2) Position a cursor on the trace so that it is well after the connection between the CT100 and the
terminator.
3) The absolute value of the vertical measurement in mρ divided by 2000mρ full scale is the
percent error for vertical measurement.
Vertical Position Check
Vertical Position Check
1) Increase vertical scale to 500mρ/div by turning the
VERTICAL SCALE
knob to the left.
2) Use the
VERTICAL POSITION
knob to move the live trace completely above the horizontal
midline of the screen.
3) Use the
VERTICAL POSITION
knob to move the live trace completely below the horizontal
midline of the screen.
A CT100 must succeed at both operations to pass the Vertical Position Check.
Input Susceptibility Check
Input Susceptibility Check
Input susceptibility is a design value determined by the hybrid manufacturer and cannot be
measured by the user.
Distance Cursor Resolution Check
Distance Cursor Resolution Check
Distance cursor resolution is a value determined by a software constant. It can be measured by
counting distinct locations that a cursor may occupy between two division lines, including one of
the division lines.
Cursor Readout Range Check
Cursor Readout Range Check
In the
Measurement
menu, set the cable length to “extra long.”
Mohr CT100 / CT100HF Operator's Manual
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