HP 54753A User Manual page 136

13
Figure 7-17
1
2
3
4
5
6
7
Single-ended TDR Measurements
Measuring Transmission Line Percent Reflection
Press the softkey to turn off channel 1 display.
Display
The green waveform is function 2 which is the 500 ps filtered waveform of
channel 1. Because 500 ps is much greater than 35 ps, the overall system
risetime is approximately 500 ps.
We will now calculate the peak percent reflection using the measured voltage
and the following formula:
p
max
This method does not require establishing normalization or the reference plane
which is useful for quick measurements or when establishing normalization and
the reference plane is difficult to do.
Press the
SETUP Marker
Press the Mode softkey and select
Press the Enter softkey.
Press the softkey and select
+ Source
Press the Enter softkey.
Press the Reference softkey to select
Press the
Marker units . . .
7-28
v 200 mV –
×
= 100 --------------------------- -
200 mV
key.
TDR/TDT
function 2
ref plane
softkey.
.
.
.