Tektronix CURVE-TRACER 576 Instruction Manual page 24

Operating Instructions--Type 576
OFFSET MULT
Control
STEPS Button
PULSED STEPS
Buttons
STEP FAMI LV
Buttons
RATE Buttons
2-6
OPPOSE-Allows zero step of Step
Generator output to be offset as
many as 10 steps below its ?ero off-
set level.
Provides calibrated offset of step Gen-
erator output to ±10 times AMPLI-
TUDE setting when either OFFSET
AID or OFFSET OPPOSE button is
pressed.
Provides steps of normal duration
(step lasts for entire period of rate
cycle).
Allows Step Generator output to be
applied to Device Under Test for only
a portion of normal step duration.
Pulsed steps occur at peak of Collector
Supply output.
300 lJS-Selects pulsed steps with
duration of 300 lJS. Collector Sup-
ply is automatically switched to DC
mode.
80 lJS-Selects pulsed steps with
duration of 80 lJS. Collector Supply
is automatically switched to DC
mode.
300
f.LS
and 80 lJS-When buttons
are pressed together, selects pulsed
steps with duration of 300 lJS; how-
ever, Collector Supply is not auto-
matically switched to DC mode.
Allows steps to be generated in repeti-
tive families or one family at a time.
ON REP-Provides repetitive Step
Generator output.
OFF SINGLE-Provides one family
of steps whenever button is pressed.
Once button has been pressed, Step
Generator is turned off until
pressed again or until ON REP but-
ton is pressed.
Selects rate at which steps are genera-
ted.
NORM-Provides normal Step Gen-
erator rate of 1 X normal Collector
Supply rate ( 120 steps per second
for 60Hz line frequency).
2X-Provides rate of two times nor-
mal rate.
. 5X-Provides rate of one half nor-
mal rate.
2X and .5X-When buttons are
pressed together, provides normal
rate but with step transistions oc-
curing at peak of Collector Supply
SWP.ep.
STEP/OFFSET
POLARITY IN-
VERT Button
STEP MULT .1X
Button
Allows change of polarity of Step Gen-
erator output (from polarity set by
POLARITY switch).
Provides 0.1 times multiplication of
step amplitude, but does not effect
offset.
Standard Test Fixture
Controls
Terminal Selector
Switch
LEFT-OFF-RIGHT
Switch
Interlock
Switch
Connectors
Adapter
Connectors
Selects way in which Step Generator is
applied to Device Under Test. In all
positions Collector Supply output is
connected to Collector terminal.
EMITTER GROUNDED-Emitter
of Device Under Test is connected
to ground.
STEP GEN-Step Generator is
applied to base terminal of
Device Under Test. Normal op-
erating position.
OPEN (OR EXT)-Base terminal
of Device Under Test open. Ex-
ternal signal applied to EXT
BASE OR EMIT INPUT connec-
tor, will be applied to base ter-
minal.
SHORT -Base terminal of De-
vice Under Test is shorted to
emitter terminal.
BASE GROUNDED-Base terminal
of Device Under Test is connected
to ground. Step Generator polarity
is inverted.
OPEN (OR EXT)-Emitter ter-
minal of Device Under Test is
open. External signal applied to
EXT BASE OR EMIT INPUT
connector, will be applied to
emitter terminal.
STEP GEN-Inverted Step Gen-
erator output is applied to emit-
ter of Device Under Test.
Selects which device (choice of 2) is to
be tested, left or right.
Enables Collector Supply when Protec-
tive Box is in place and lid is closed .
A I lows connection of various test
adapters to Standard Test Fixture.
Connectors will accept standard size
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