Appendix C: Operator Performance Check
The difference in time between the two cursors is the 10-90% reflected rise time.
Reflected Rise Time Check (20-80%)
Reflected Rise Time Check (20-80%)
This procedure is identical to the Reflected Rise Time Check (10-90%) except that the two cursors
should be positioned at -800mρ and -200mρ.
The difference in time between the two cursors is the 20-80% reflected rise time.
Jitter, Noise, and Sampling Efficiency Check
Jitter, Noise, and Sampling Efficiency Check
1) Connect a 50 Ω terminator to the CT100 front panel cable connector.
2) From the
Main
menu, select the
Diagnostics
menu item to enter the
Diagnostics
submenu.
3) Select
Jitter
. After a moment, a results window appears with a list of measurements.
The value for Jitter used in the specification for a CT100 is Jitter P2P, the second value in the
second to last line of the results.
The value for Noise is the second number on the first line of the result, Noise P2P.
Output Impedance Check
Output Impedance Check
1) Disconnect any cables from the CT100 front panel cable connector.
2) Position a cursor before the falling edge of the trace.
3) Position the second cursor well beyond the falling edge.
Mohr CT100 / CT100HF Operator's Manual
73
Figure 25: Cursor placement for determination of 10-90% rise
time. The active cursor is at -100.7mρ while the inactive cursor is
at -900.3mρ. The difference in time between cursors is the 10-90%
rise time, in this case 0.11451 nanoseconds.
