Specifications

Chapter 1 Introduction ASM-10/8 Installation and Operation Manual
1-6 Functional Description
1.3 Functional Description
This section contains functional descriptions of the circuit blocks of ASM-10/8,
primarily those circuits which are required for setting the desired modem
configuration (see Figure 1-6).
ENCODER
CONTROL
RV CLK
MODULATOR
TIMING
RPF
GENERATOR
(
ASM-10-SA
ONLY)
ENCODER
MODULATOR
SELECTABLE
XMT AMPLIFIER
POWER
SUPPLY
ANALPBK
DATA RATE
RCV
FILTER
RCV
XMT
2W
4W
AGC
AUTOMATIC
EQUALIZER
DECODER
TIMING
RECOVERY
CARRIER
DETECT
RPF
DECODER
(ASM-10-R
ONLY)
109 (CF) DCD
PIN 22
PIN 11
RPF RESET
RPF LED
115 ( BB) RX C
RCV RLB
TXD
LOOP 3
REM
LOOP 2
TXC
EXT.
CLK
ANA LOOP
104 (BB) RXD
CTS
RTS
RLB
COMMAND
DECODER
DIG LPBK
SYNC
ASYNC
RLB
COMMAND
GENERATOR
ASYNC TO
SYNC CONV
Figure 1-6. ASM-10/8 Block Diagram
Encoder
The encoder modulates the input data from the DTE using the conditional diphase
modulation technique.
The encoder can be configured to operate in one of the following different modes:
• 4-wire full duplex
• 4-wire half duplex
• 2-wire half duplex
• 4-wire multipoint
• 2-wire multipoint.