Datapulse 101 - Page 9

The
1000:1
coverage
on
delay
and
width
timing
control
ranges
made
possible
by
a
unique
circuit
design
allows
extremely
wide
vernier
coverage
with
little
or
no
sacrifice
in
resolution.
2.2
DESCRIPTION
OF
CONTROLS
AND
CONNECTORS
2. 2. 1 Power Switch
WARNING
Do not connect the unit to a line
source nor turn it on before veri-
fying that the 115-230 line voltage
selector switch is in the correct
position.
to
the
transformer
primary
within
the
instrument
and
lights
the
red
pilot
lamp
when
it
is
turned
ON.
2. Z. Z Repetition Rate Control
The
larger
eleven
position
REPETITION
RATE
knob
selects
either
the
trigger
mode
or
the
repetition
rate
range
and
the
smaller
vernier
knob
provides continuously variable frequency control for each repetition rate
range setting.
-
1
The
POWER
toggle
switch
connects
or
disconnects
ac
input
voltage
There are six repetition rate ranges in decade steps. The instru-
ment
will
be
set
to
the
repetition
rate
indicated
by
the
selector
knob
position when the vernier knob is fully clockwise.
The EXT TRIG SLOPE (+) and (-) pOSitions provide for instrument
triggering from an external source by either a positive or negative going
waveform.
In the LINE SLOPE positions the unit is triggered from either the
positive or negative slope of the ac line voltage waveform.
The SINGLE PULSE position of the REPETITION RATE selector
knob allows the instrument to be triggered manually by the red SINGLE
PULSE button for one cycle of output.
The setting of the TRIGGERING LEVEL control determines the ampli-
tude point of either a positive or negative signal that will operate the unit for
both external and line voltage triggering.
A BNC connector (TRIGGER INPUT) is provided for the input signal
when the instrument is triggered from an external source.
2.2. 3 Gate Mode
The three position GATE MODE slide switch determines whether the
2-2