RAD Data comm ASM-20 1.3 Functional Description

Chapter 1. Introduction ASM-20 Installation and Operation Manual
1-4 Functional Description 6/4/99 13:10
GNDRCVXMT
DTE
100-115 VAC
-0.2A T 2 5 0 V
~230 V/ 0 .1 A T 250V
Figure 1-5 ASM-20 Rear Panel with V.35 Interface
1.3 Functional Description
This section contains functional descriptions of the circuit blocks in ASM-20,
primarily those circuits which are required for configuring the modem (see
Figure 1-6).
Figure 1-6 ASM-20 Block Diagram
Encoder The encoder receives data from the DTE, then modulates the data using the
CDD “conditional diphase modulation” technique.
• 4-wire full duplex
• 4-wire half duplex.