Agilent Technologies ESA-E E4401B, Справочник пользователя/программиста

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Chapter 2 147
Front-Panel Key Reference
Sweep
Fr
ont-P
ane
l K
e
y
Ref
e
re
nce
valid most of the time. When the adjustment is done
you can set the analyzer back to the desired sweep
time, or set it back to
Auto Couple
.
Key Access:
Sweep, Gate
NOTE Trig Delay (On)
and
Gate (On)
cannot be active at the same time. If
Trig Delay (On)
has been previously selected, it will be reset to
Trig Delay (Off)
when
Gate (On)
is selected. Conversely, if
Gate (On)
has
been previously selected, it will be reset to
Gate (Off)
when
Trig Delay (On)
is selected.
NOTE
If
Gate (On)
is selected without an external trigger signal present,
operating other functions, such as: tracking, frequency count, or
preselector centering, may cause the analyzer to stop functioning until
it is powered on again.
Gate Control
Edge Level
Allows you to select between
Edge
and
Level
triggering
of the gate.
Gate Control (Edge)
opens the gate in
response to an edge trigger on the trigger input after a
delay set in
Gate Delay
. The gate stays open for the
selected
Gate Length
. When
Gate Control (Level)
is
selected, the gate is open as long as the trigger input is
true, as defined under the
Level Gate
key.
Key Access:
Sweep
,
Gate
Edge Gate
Accesses menu keys that allow you to set up edge
triggering.
Key Access:
Sweep
,
Gate
Slope Pos Neg
Sets the polarity for edge triggering of
the gate. When
Slope (Pos)
is pressed, a
positive-going edge will trigger the
opening of the gate, after the delay set
with the
Gate Delay
key. When
Slope (Neg)
is pressed, a negative-going
edge will trigger the opening of the gate
after the set delay.
Key Access:
Sweep
,
Gate
,
Edge Gate
Gate Delay
Controls the length of time from the
trigger until the gate is turned on.
Key Access:
Sweep
,
Gate
,
Edge Gate
Gate Length
Controls the length of time that the
gate is on when using edge triggering to
control the gate.