2.0 Circuit Description
CX28394/28395/28398
2.4 Transmitter
Quad/x16/Octal—T1/E1/J1 Framers
2.4 Transmitter
The Transmitter (XMTR) inserts T1/E1 overhead data and outputs single rail
NRZ data from the TSB or ZCS-encoded P and N rail NRZ data. The CX28395
only provides single rail NRZ transmit signals.
The XMTR, Figure 2-20, consists of the following elements: two Transmit
Data Links, Test Pattern Generator, In-Band Loopback Code Generator, Overhead
Pattern Generator, Alarm Generator, Zero Code Suppression (ZCS) Encoder,
External Transmit Data Link (CX28394 and CX28398 only), CRC Generation,
Framing Pattern Insertion, and Far End Block Error Generator.
Figure 2-20. XMTR Diagram
TXCLK
Line
Framer
Loopback Loopback
Transmitter
Timebase
To TSBI
TPOSO/TNRZO
AIS
Generator
ZCS
Encoder
TNEGO/MSYNCO
TNRZ
2-40
Conexant
100054E
CONEXANT [ CONEXANT SYSTEMS, INC ]
