Scientific Atlanta 8500 SERIES Operator's Manual page 87

33T056Z
AC 115V 60HZ
RELAY DRIVE
L__r:;L--..+s
L '
l-=-:'.J
(TO OTHER
MODULES)
---~--
. . +15V
--er--
!TO OTHER
. MODULES)
L
r:;;i ___ ._...
+35V
~
(TOOTHER
MODULES)
KEY'.
PHONO~PLUG
~
+15
+5
PLL
D
T
SMHz
FEED THRU
CAPACITOR
-c:=i-
A/B
DRIVE
3
RF IN
FROM LPF
SWITCH DRIVER
U/D CONVERTER
ADDRESSABLE ,
~----
. .,
µC (8049) DECODER
2rod OSC
RF OUT
DESCRAMBLER
4.5 MHz
ADDRESSL]_
--~TEST ~==============~-=====T-_____J!;
PORT
+5
+15
ADDRESSABILITY CIRCUITRY
+35
Figure 6-5. Block Diagram,
Basic C Configuration
6-13/6-1~