34
SHORT-HAUL MODEM-B SYNC (SHM-B SYNC)
Appendix B: Block Diagram
TD
RTS
CTS
DTR
DSR
SIG. GND
TC
RC
DCD
RD
CLOCK
GENERA
T
O
R
D
ATA
MODULA
T
O
R
DEMODULA
T
O
R
J1
2
4
5
20
6
7
15
17
8
3
+12V
+12V
RECEIVE DA
TA
RECEIVE CLOCK
LOOP
CURRENT
DETECT
XMIT DA
TA
XMIT CLOCK
BAUD RA
TE SELECTION
XMIT
ENABLE
CLOCK
+12V
TRANSMIT DA
TA
INDICA
T
O
R
NORMAL
LOOPBACK
D
ATA
+
CLOCK
RX+
RX–
TX–
TX+
RECEIVE DA
TA
INDICA
T
O
R
+12
+12
POWER
SUPPL
Y
XFMR
+12
+12
OPT
O
ISOLA
T
ORS
D
ATA
+
CLOCK
16X
CLOCK
Summary of Contents for ME801-C
Page 36: ...35 NOTES...
