HP 54753A - Page 106

Measure and Other TDR Specific Menus
TDR/TDT Measure Menu
6-8
For differential response to differential stimulus and common mode response
to common mode stimulus, the following formula is used:
where:
V
max
= the maximum voltage value along the waveform
V
min
= the minimum voltage value along the waveform
V
1ref50Ω
= the channel 1 reference plane voltage into a 50 ohm load
V
1ref0Ω
= the channel 1 reference plane voltage into a short
V
2ref50Ω
= the channel 2 reference plane voltage into a 50 ohm load
V
2ref0Ω
= the channel 2 reference plane voltage into a short
For differential response to common mode stimulus and common mode
response to differential stimulus, the following formula is used.
where:
V
max
= the maximum voltage value along the waveform
V
min
= the minimum voltage value along the waveform
V
1ref50Ω
= the channel 1 reference plane voltage into a 50 ohm load
V
1ref0Ω
= the channel 1 reference plane voltage into a short
V
2ref50Ω
= the channel 2 reference plane voltage into a 50 ohm load
V
2ref0Ω
= the channel 2 reference plane voltage into a short
For all other stimulus, the following formula is used.
where:
V
max
= the maximum voltage value along the waveform
V
min
= the minimum 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
TDT gain
TDT gain 100
V
max
V
min
–
V
1
ref
50
Ω
V
1
ref
0
Ω
–
()
V
2
ref
50
Ω
V
2
ref
0
Ω
–
()
+
-------------------------------------------------------------------------------------------------------------
=
TDT gain 100
V
max
V
min
–
V
1
ref
50
Ω
V
1
ref
0
Ω
–
()
V
2
ref
50
Ω
V
2
ref
0
Ω
–
()
+
2
-------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------
=
TDT gain 100
V
max
V
min
–
V
ref
50
Ω
V
ref
0
Ω
–
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