Operating Instructions-7CTlN
COLLECTORIDRAI
N Varies the collectordrain supply
VOLTS output voltage within the range
set
by the .5V
-
2V and XI0 push-
buttons.
.5 V
-
2 V and X10 Selects the horizontal deflection
Pushbuttons factor and the range of the
collector-drain supply output.
Table 1-2 shows the deflection
factors and voltage ranges for the
various
states
of the pushbuttons.
TABLE
1-2
Collector-DrainSupply Outplit Ranges
and
Horizontal Deflection Factors
Collector-
Drain Horizontal
Factor
VERTICAL Selects the vertical deflection
factor. The range of the switch is
from 10pA/division to 20 mA1
division in
a
1-2-5sequence, with
the
+
1000 pushbutton in; and
from 10 nA/division to 20pAl
division in
a
1-2-5sequence with
the pushbcrtton out.
Out
Out
In
In
STEP AMPL
When out, the sensitivity of the
vertical display amplifier is
increased 1000 times for making
leakage current measurements.
Also, when out, the collector-drain
supply is changed from a sweeping
output to a DC (non-looping)out-
put.
Out
In
Out
In
Selects the step amplitude of the
base-gate step generator output.
When the XSTR-FETpushbutton is
out, the step amplitude range is
from 1
pA/step to 1mA/step in a
1-2-5 sequence; when the push-
button is in, the step amplitude
range
is
from 1mV/step to 1Vlstep
ina 1-2-5sequence.
STEP
0 V to 7.5 V
OVto30V
0
V to 75 V
0 V to 300 V
Continuously variable control
which determines the number of
steps inthe base-gatestep generator
,
output. The number of steps ranges
from 0 to at least 10 steps.
0.5 V/Div
2V/Div
5 V/Div
20 V/Div
STEP OFFSET When pulled out, the control
provides continuously variable off-
set of the base-gatestep generator
output from at least 5 steps of
opposing offset (control fully
counterclockwise) to at least
5
steps of aiding offset (control fully
clockwise). When the control is
pushed in, zero offset
is
obtained.
NPN, N CH
-
PNP, Selectsthe polarity of the collector-
P
CH
Pushbutton drain supply output and the base-
gate step generator output. When
the
.
pushbutton
is
out, the
collector-drain supply output is
positive and the base-gate step
generator steps are either positive-
going for current steps or negative-
going for voltage steps. When the
pushbutton
is
in, the collector-drain
supply output is negative and the
base-gate step generator steps are
negative-goingfor current steps and
positive-goingfor voltage steps. The
XSTR -FET pushbutton determines
whether the base-gate step genera-
tor output is current or voltage
steps. The NPN, N CH-PNP, PCH
pushbutton also determines the
position of the display. When the
pushbutton is out, the zero position
of the display
is
located in the
lower left corner of thedisplay unit
CRT; when in, the zero position is
in the upper right corner of the
CRT. The positioning accuracy is
within 0.3 division and may be used
to the check calibration accuracy of
the system.
XSTR-FET Selects whether the base-gate step
Pushbutton generator output
is
current steps or
voltage steps. When the pushbutton
is
out, the base-gate step generator
output is current steps in the same
direction as the collectordrain
supply output; when the push-
button
is
in, the output
is
voltage
steps in the opposite directjon to
the collectordrain supply output.
This pushbutton also selects which
