Controls, Connectors, and Indicators
DLY, AV, At, Each of these readouts includes a function name, a
and 1/At signed, floating-point numeral, and the appropriate
Readouts unit symbol. Numerals are displayed with larger sized
characters. A numeral immediately following "AV"
indicates which channel provides the delta voltage
scaling,
the lowest numbered of the displayed
channels. Sweep Delay Time (DLY) is displayed for
the inten. Ait, and B horizontal display modes when
none of the delta functions are selected. Except for
DLY, these readouts are enabled with Readout
Intensity set for Scale Factors On or Scale
Factors Off.
A question mark appears after the AV function label
when the function applies to CH 3 or CH 4,
indicating poorer accuracy than is available with
CH
1
or CH 2.
A question mark appears in a DLY readout or in a At
or 1/At readout with a pair of sweep delays, when
one or both of the sweep delay settings is less than
1%
of maximum delay {full scale) setting or when the
B-Trigger mode is TRIG AFT DLY (or, with CTT.
TRIG A DLY). With the C7T, these question marks
disappear when a direct measurement is complete. A
question mark also appears when the difference
between the pair of delays in 1/At is less than 1% of
full scale, and the CTT does not remove it.
For the lowest 0.5% of the range of DLY settings,
the reading is zero. This offset lends accuracy to
delay time settings. It is related to the circuit offset
that makes the A-Sweep triggering event viewable at
minimum delay.
Sets the B-Sweep Delay Position. It sets the reference
B-Sweep delay when At or 1/At is active with two
delays. When any cursor mode is active, the A REF OR
DLY POS control positions the reference cursor (dotted
line) and has no effect on B-Sweep delay.
When TRACK mode is selected, A REF moves both the
reference and delta cursors or delays, equally.
When a Save mode is active, A REF selects character
positions in a setup name or attribute fields in a
sequence step definition.
When MEASURE is active, A REF selects items or item
groups in the Time Interval Configure menu and selects
character positions in event-count definition displays.
With the WR, A REF selects character positions in
word-definition displays.
(35) A REF OR
"" DLY POS
Control
2465B/2455B/2445B Operators 5-17
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