Scale Reference Menu; Electrical Delay - Agilent Technologies 8719D User Manual

Scale Reference Menu

The @ZiZGJ key provides access to the scale reference menu. Softkeys within this menu can
be used to define the scale in which measured data is to be displayed, as well as simulate phase
offset and electrical delay. The following softkeys are located within the scale reference menu.
, ;&m# #&g&g

Electrical Delay

(with cut-off frequency) in order to identify which type of transmission line the delay is being
added to.
Electrical delay simulates a variable length lossless transmission line, which can be added to or
removed from a receiver input to compensate for interconnecting cables, etc. This function
is similar to the mechanical or analog "line stretchers" of other network analyzers. Delay is
annotated in units of time with secondary labeling in distance for the current velocity factor.
Once the linear portion of the test device's phase has been removed, the equivalent length of
the lossless, transmission line can be read out in the active marker area. If the average relative
permittivity (EJ of the test device is known over the frequency span, the length calculation can
be adjusted to indicate the actual length of the test device more closely. This can be done by
entering the relative velocity factor for the test device using the calibrate more menu. The
relative velocity factor for a given dielectric can be calculated by:
assuming a relative permeability of 1.
6 4 0 Application and Operation Concepts
(meters) =
Length
Velocity Factor = 1