Block Code Encoder

Block Code Encoder

Block Code Encoder
Technical Data:
PCM Data Input serial: TTL-level
PCM Data Input Format: 8-bit frame, with 3 most significant bits zero, 4 message bits (bit 4 is most significant data bit) and bit 0 (LSB) is the embedded frame synchronization bit
Bit Clock Input: typically, 2kHz, (<8kHz), TTL-level
Output Block Data serial: TTL-level
Output Block Data Format: 8-bit frame, with 7-bit codeword plus, LSB as embedded frame synchronization bit; 1, 2 or 3 most significant bits allocated as check bits, depending upon the selected code
Frame Synchronization: Input FS synchronization signal is taken from the preceding
module, typically the PCM ENCODER module
Embedded Frame Synchronization Signal is not altered by the encoding process
Linear Block Codes dependent upon EPROM version installed:
Parity - even; Hamming - single error correction; Parity - odd; Cyclic.
TDM Mode compatible with data generated by two PCM ENCODER modules operating in TDM mode.

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