HP 54753A User Manual page 118

1
2
Figure 7-3
Reflected Step
Incident Step
1
2
Single-ended TDR Measurements
Establishing the Reference Plane and Normalizing
Press the
SETUP Time base
Change the Scale until you see two positive going edges on screen
(Figure 7-3).
The left-most edge is the incident step and starts at 0 mV and goes to 200 mV.
The right-most edge is the reflected step that has traveled from the TDR step
generator to the end of the cable and back to the TDR sampler. This step starts
at 200 mV and goes to 400 mV.
Change the Scale and
in the middle of the display and to move the reflected step off screen.
Press the blue key followed by the
measurement on and select
7-10
key located below the display.
Position to approximately center the incident step
7 key to turn the automated risetime
.
channel 1