APPENDIX D
BLOCK DIAGRAM
TD-A
RD-A
TD-B
RD-B
P
R
S
T
TD
RD
2
3
RD
TD
3
2
RD-A
TD-A
RD-B
TD-B
R
P
T
S
TC-A
XC-A
XC-B
Y
U
W
XC
TC
24
15
TC
XC
15
24
RS-232
V.35
AA
AA
TC-B
XC-A
TC-A
TC-B
U
Y
XC-B
RC-A
W
V
RC
17
RC-B
X
RTS
CTS
C
D
V.35
RTS
CTS
4
5
RS-232
DCD
DTR
FG
F
H
A
V.35
DCD
DTR
FG
8
20
1
RS-232
+5V
-5V
POWER SUPPLY
AND
CTS
RTS
XC
TC
24
15
4
5
DTR
DCD
DSR
6
8
20
DATA
SWITCHING
REGULATOR
+V
SG
7
PATTON ELECTRONICS MODEL 2020 BLOCK DIAGRAM
SG
B
AUGUST 12, 1994 REV. D
DSR
6
DSR
E
V.35 DRIVER
DIFFERENTIAL
AMPLIFIER
V.35 DRIVER
DIFFERENTIAL
AMPLIFIER
DIFFERENTIAL
AMPLIFIER
V.35 DRIVER
11
