Tektronix CURVE-TRACER 576 Instruction Manual page 59

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Circuit Description-Type 576
Trig
Gen
U3A & B
Delay
023 030
U33A
Norm Pulse
To
Counter
.5 X
(RA~~----_.--------~
Low
Inhibits
Norm
Pulse
6
Low Inhibits
Delayed
Pulse
2X
IRA~~----~------ 1 - 2 -Q
11
U20D
4
Logic Symbols:
Positive logic, Ml L·STD
806B; see Diagrams
section for further
information.
Pulse Timing Chart
Output T701 pin 11
Output T701 pin 13
nL..--...JnL..--.....JnL..--.....JnL.. __ __.nL..----In'------'n
Output U22A Normal
n.__ _______
_.n._ ________
_.n .. ________
ll
Output U22A U3C & U3D Inhibited
Input to U22D pin 13
u
u
u u u u
u
Input to U22C pin 9
Input to U22C pin 10
Collector Supply Output +(NPN)
n.__ __
--JnL-----'nL-----'nL-----'n..._ ___ . . . . . . . . nL-----'n
Output U22C NORM Button pushed
n.__ _______
___.n .. ________ __,n._ ________
_.n
Output U22C X.5 Button pushed
Output U22C X2 Button pushed
Output U22C X2 & X.5 Button pushed
Fig. 3-4. Logic diagram, Pulse Timing chart for Step Generator Clock circuit.
®
3-5