Datapulse 101 - Page 11

1
a
Z.
2.
8
Amplitude
Control
The
POSITIVE
and
NEGATIVE
AMPLITUDE
knobs
provide
continuously
variable
control
from
10
volts
to
less
than
0.
5
volts
for
the
simultaneously
occurring
positive
and
negative
main
output
pulses.
For
both
outputs
the
baseline
is
at
ground
potential
and
the
source
impedance
is
very
low
(approximately
50
ohms
or
less).
The
POS
OUTPUT
ENC
connector
couples
the
variable
parameter
positive
pulse
to
an
external
load.
The
NEG
OUTPUT
BNC
connector
couples
the
variable
parameter
negative
pulse
to
an
external
load.
The
GRD
jack
provides
access
to
the
instrument
ground
for
test
connections.
2. 3 OPERATING PROCEDURE
2
3.
1
Equipment
(or
equivalent)
Required
a.
Tektronix
Model
661
Sampling
Oscilloscope.
b.
Tektronix
Model
543
Real
Time
Scope
with
CA
Plug-in
Unit.
c,
Datapulse
Model
101
Pulse
Generator.
d.
Datapulse
Type
2003
Power
Termination.
2. 3. 2 Preliminary Settings
WARNING
Do not connect the unit to a line
source nor turn it on before veri-
fying that the 115-230 line voltlge
selector switch is in the correct
position.
a.
Turn
the
REPETITION
RATE
selector
knob
to
the
O.
1
MHz
position
and
the
vernier
knob
fully
clockwise.
b.
Turn
the
PULSE
DELAY
selector
knob
to
the
0.
l‘pS
position
and
the
vernier
knob
fully
clockwise.
c.
Turn
the
PULSE
WIDTH
selector
knob
to
the
l.
0
uS
position
and
the
vernier
knob
fully
clockwise.
d.
Turn
both
AMPLITUDE
knobs
fully
clockwise
to
the
10V
positions.
I
2-4