HP 54754A TDR/TDT Setup Menu
TDR rate automatic . . . (250 kHz)
5-34
TDR rate automatic . . . (250 kHz)
The
TDR rate automatic . . . (250 kHz)
function allows you to manually or
automatically select the repetition rate of the TDR step. The range of values
for manual mode selection are from 50 Hz to 250 kHz repetition rate using a
1-2-5 sequence. When this function is set to automatic, the TDR step repetition
rate varies automatically as the Time base
Scale
is changed to keep multiple
steps off screen. As the TDR rate decreases, TDR measurements can be made
on longer transmission lines.
Key Path TDR/TDT Setup
TDR rate
automatic
Key Path TDR/TDT Setup
TDR rate
manual
Preset TDR/TDT
The Preset TDR/TDT function prepares the oscilloscope for making TDR/TDT
measurements by automatically setting several menu fields. The TDR preset
feature appears in the TDR/TDT Setup menu once a stimulus has been selected.
The menus that are affect by this feature are shown in Table 5-12.
Table 5-12
Preset TDR/TDT Configuration
Key Path TDR/TDT Setup
Preset TDR/TDT
Menu Menu Item Set To
Acquisition Averaging on
Best Flatness
Time Base Scale 500.0 ps/div
Position Set to a value which places the incident
edge on screen.
Channel 1 Setup Display on
Scale 100 mV/div
Offset 0.0 mV
Bandwidth 18.0 GHz
Attenuation units ratio
Attenuation 1.000 : 1