Tektronix 492 - Page 203

Theory of Operation—492/492P Service Vol. 1 (SN B030000 & up)
PISPLAY ENAB LEffi}-
'iPARE {«}-
BLANK ENABLE [ g ] -
EXT BLANK. 1 (|T3—
EXT B L A N K 2 [ 2 } -
MAX HOLD {ts}-
p e a k / A V 5 [ 30 }-
VALI3 © -
u p / d o w n 0 -
SERIAL
COMPARE
L/R SHIFT
REGISTER
WEM ORY IN iJJ j-
CO N STA N T £5f}-
B^A
(B-A>+ K
SERIAL
CALCULATOR
DISPLAY
KEQ1STE R
I
Η -Ξ
- H 3
-M 2 5
— 0 <
- Q 3
- H I ] 2
—►—ps) 0
'
^V ER TIC AL DISPLAY
MAX
HOLD
ELAN KINQ
LC G ,iC
—+ —( 24) BLANK IN G
t t U X
MEMORY OUT
PEAK/AVQ
SELECTOR
/’ r
-
SUBTRACTOR
/ ►
-
MINUEND
REiiiSTEK
\
PEAK
su b t r a h e n d
NUMERATOR
REGISTER
REGISTER R OISTER
25 BIT
ZS
SHIFT
-f — ►
REGISTER
PEAK 17 to
1 DATA
DETECTOR
CONCENTRATOR
START DIViDE © - H
I
CLOCK [20}
INTERNAL
10 BIT
DIV! DE
COUNTER MAST ER
TiMiNQ
in t e r n a l
CLOCK
GENERATOR
WERT ACQUISITION
Fig. 5-15. Vertical control IC U1023 block diagram.
5-40
REV FEB 1983