Tektronix CURVE-TRACER 576 Instruction Manual page 68

Circuit Description-Type 576
Standard Test
Fixture Schematic
Device
EMITTER Under
GROUNDED Test
BASE
GROUNDED
EMITTER
.._____,~_.GROUNDED
BASE
GROUNDED
====:::::!J!J
~~n
R425
Rc
R422
Note:
Pin numbers refer to
Connector J360.
+
To Vertical
Display Switching
As
Rc
RA
As
l
RA
Note
Overlap
A'
B
+
To Horizontal
Display Switching
Display Sensitivity
Switching Schematic
R405 through R409
R414 through R418
R433 through R438
Collector
Supply
Output
Current
Return
Guard
•----:1~ >---J
Box
Pins
11,12,27
Pins
13,28,29
R439 through R440 (or open)
R442 through R444
R442 through R445
Fig. 3-8. Simplified schematic of Display Sensitivity Switching and Standard Test Fixture schematics for measurement of collector current
(lc)
and collector-emitter voltage
(V
CE) or collector-base voltage
(V
CB)-
3-14
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