Gate Operating Mode; Ext Trig Operating Mode - HP 8082A Operating And Service Manual

3-22

GATE OPERATING MODE

in Gate mode the repetition rate is defined
3 - 2 3
by the rate controls but no output occurs until the
tage of an externally applied signal rises above (SLOPE/
POLARITY switch set to
POLARITY switch set to NEG) the level set on the
EXT INPUT LEVEL control. The last pulse of a 'burst'
correct
is always of width even if the gate closes during
E R L
XTE N A
INPUT
SIGNAL
TRIGGER
OUTPUT
Figure 3-6. Pulse Output in Gate Mode .
3 - 2 4

EXT TRIG OPERATING MODE

3 - 2 5 In External Trigger mode the pulse and
ger repetition rates are determined by the repetition rate
of an externally applied signal. To obtain an output simi-
lar to that in Figure 3-7, adjust the controls as shown
EXTERNAL
INPUT SIGNAL
TRIGGER
OUTPUT
PULSE
OUTPUT
o v
FIXED
DELAY (17134 +
the pulse. To obtain an output similar to that in Figure
3-6, adjust the controls as shown below. It is assumed
that the controls are already set-up as described above for
a pulse in External Width mode; therefore only the alter-
ations to these controls settings will be given, Switching
to External Width mode when in Gate mode can be used
to check for correct functioning of the gate signal.
a. Set the Mode switch @ to GATE.
TRIGGER
below. It is assumed that the controls are already set-up
as described above for a puise in Gate mode; therefore
only the alterations to these control settings will be given.
a. Set the Mode switch @ to EXT TRIG.
TRIGGER LEVEL
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