Tektronix 7834 - Page 84

Theory
of
Operation-7834
FROM
VERTICAL
MODE
SWITCH
VERTICAL ALTERNATE
COMMANDFROM
PIN 6, U4368
VERT TRACE
SEPARATION (B)
MAIN
FRAME CHANNEL
SWITCH SIGNAL
(DISPLAY B)
B MODE (HORIZ)
ALT MODE (VERT)
DELAY MODE
CONTROL
RIGHT
MODE
VERTICAL
CHOPPING
SIGNAL FROM
PIN 1, U4340
Figure 3-21 . Logic diagram of Vertical Mode Logic stage .
TRACE
SEPARATION
(D = HAS NO EFFECT IN THIS CASE
(1195-22) 1988-47
Figure 3-22 . (A) Logic diagram of Trace Separation stage ;
(B)
Table of input/output combinations .
MAIN
FRAME
CHANNEL
SWITCH
SIGNAL
(DISPLAY
RIGHT)
(1195-21) 1988-46