HP 8719ET Reference Manual page 191

Hardkey/Softkey Reference
Analyzer Functions
VELOCITY FACTOR
USER SETTINGS
VIEW MEASURE
VOLUME NUMBER
WAIT x
WARNING
WARNING [ ]
WAVEGUIDE
WAVEGUIDE DELAY
5-64
enters the velocity factor used by the analyzer to calculate
equivalent electrical length in distance-to-fault
measurements using the time domain option. Values
entered should be less than 1.
Velocity factor is the ratio of the velocity of wave
propagation in a coaxial cable to the velocity of wave
propagation in free space. Most cables have a relative
velocity of about 0.66 the speed in free space. This velocity
depends on the relative permittivity of the cable dielectric
(ε ) as:
Velocity Factor
r
selects a menu of user settings, including preset settings
that can be changed by the user.
toggles to become view setup when the analyzer is in
frequency offset mode.
specifies the number of the disk volume to be accessed. In
general, all 3.5 inch floppy disks are considered one
volume (volume 0). For hard disk drives, such as the
HP 9153A (Winchester), a switch in the disk drive must be
set to define the number of volumes on the disk.
pauses the execution of subsequent sequence commands
for x number of seconds. Terminate this command with
.
x1
Entering a 0 in wait x causes the instrument to wait for
prior sequence command activities to finish before
allowing the next command to begin. The wait 0 command
only affects the command immediately following it, and
does not affect commands later in the sequence.
selects the display warning annotation for color
modification.
brings up the color definition menu. The warning
annotation default color is black.
defines the standard (and the offset) as rectangular
waveguide. This causes the analyzer to assume a
dispersive delay. See
applies a non-linear phase shift for use with electrical
delay which follows the standard dispersive phase
equation for rectangular waveguide. When
WAVEGUIDE DELAY
becomes the WAVEGUIDE CUTOFF frequency, which is
used in the phase equation. Choosing a Start frequency
less than the Cutoff frequency results in phase errors.
1
= --------
ε
r
.
OFFSET DELAY
is pressed, the active function