Figure 3 97: The Graticules Pop Up Menu - Tektronix 11801C User Manual

TDR

Figure 3 97: The Graticules Pop up Menu

Step 7: Touch Graticules in the major menu and Feet, Meters, or
Inches in the pop up menu (see Figure 3 97). If you know that the
propagation velocity of your cable differs from the default, touch the
Propagation Velocity selector and adjust this parameter. If you don't
know the velocity or are using Tektronix SMA cables, accept the 0.7
default. This unitless number represents the fraction of the speed of light
that signals pass through your network or transmission line. If you don't
know the propagation velocity but you know the dielectric constant of
the transmission medium, you can convert their dielectric constant to a
propagation velocity using the following equation:
1
Prop velocity +
dielectric constant
The horizontal axis is now calibrated in your chosen units of measurement.
3 196
Reference