3. Getting Started
Table 3.4 (Continued) MENU Button and Menus
Menu Selection Purpose/Action
▷ ▷ Next Segment Selects the segment to the right of the currently
selected segment.
▷ ▷ Reset All Vp Resets the Vp of all segments to 1.000.
▷ ▷ Restore All Vp Restores Vp of all segments to the previous values.
▷ Extra Long Mode Extra Long Mode allows the CT100B to obtain traces
out to 48,000 ft. (14,600 m) (assumes Vp=0.66).
Extra Long Mode is slower than other cable lengths
and some instrument features are not available. When
in Extra Long Mode, the Cable Length menu option
will indicate Extra Long Mode On. Selecting the cable
length menu item will switch off Extra Long Mode.
▷ Vert. Units Selects vertical units for a time-domain trace from
reflection coefficient (mρ), impedance (Ω), or voltage
standing wave ratio (VSWR).
▷ Envelope Plot Captures transient cable and connector faults.
▷ ▷ Envelope Plot Off/On Enables/disables envelope plot mode. When turned
on the CT100B begins capturing trace data and
displaying envelope plot information. Envelope plots
are useful for detecting and recording transient or
intermittent faults.
▷ ▷ Reset Deletes/restarts captured TDR trace envelope data.
▷ ▷ Fill Mode Off/On Toggles between fill and frequency density plot mode.
Use fill mode to find magnitude of impedance change
and highlight fault location. Use frequency density
plot mode to find infrequent transient faults.
▷ ▷ HOLD Off/On When Hold is on, trace controls are locked for an
envelope plot. When Hold is off, trace controls work
normally.
▷ ▷ Save Picture Saves envelope plot as a screenshot.
▷ ▷ View Saved Use to view, delete, or USB save a previously saved
envelope plot screenshot.
▷ ▷ Clear As trace controls are used to change an envelope plot,
the envelope plot preserves a record of the trace from
previous positions. Clear erases this history, leaving
only the plot from the current position.
▷ Horiz. Units Toggles through horizontal units (meters, inches, feet,
yards, centimeters).
CT100B TDR Cable Analyzers Operator’s Manual 25
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