HP 54753A - Page 105

Measure and Other TDR Specific Menus
TDR/TDT Measure Menu
6-7
For all other stimulus, the following formula is used.
where:
V
max
= the maximum voltage value along the waveform
V
ref50Ω
= the reference plane voltage into a 50 ohm load
V
ref0Ω
= the reference plane voltage into a short
Key Path blue key TDR/TDT Measure
TDR maximum reflection
TDT Propagation Delay
Pressing the
TDT propagation delay
softkey display the automatically calculated
propagation delay value at the bottom of the display under the waveform
graticule.
The value is calculated using the following formula.
where:
T
edge
= the time value of the arriving edge
T
ref
= the time value of the reference plane
Key Path blue key TDR/TDT Measure
TDT propagation delay
TDT Gain
Pressing the
TDT gain softkey display the automatically calculated value at the
bottom of the display under the waveform graticule.
The calculated value is dependant on the type of response and stimulus that
are selected.
The TDR plug-in module must be calibrated and a reference plane established
before this measurement can be selected.
The TDR plug-in module must be calibrated and a reference plane established
before this measurement can be selected.
Maximum reflection 100
V
max
V
ref
50
Ω
–
V
ref
50
Ω
V
ref
0
Ω
–
-----------------------------------------


=
TDT propagation delay
T
edge
T
ref
–=