Safran CORTEX CRT Quantum - Page 50

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec. 03, 2021Sept.
30, 2021
© Safran Data Systems
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 25
1.6.1.4.3. Frame Synchronization. Telemetry Storage
 Frame synchronization Synchronization word size 8 to 32 bits
64, 96, 128, 192 for Turbo decoding
64 bits for LDPC 1/2, 2/3, 4/5
32 bits for LDPC 7/8
Frame size: 10 to 32,000 bytes
Synchronization strategy SYN (0 to 7 errors,
up to 64 errors for Turbo-decoding,
up to 64 errors for LDPC)
CTL (0 to 7 errors)
LTS (0 to 7 frames)
Bit slippage (0, 1 or 2 bits)
Synchronization word on I or Q Yes
 Frame filtering 64-bit frame mask
 CCSDS decoding transfer frame level:
Convolutional Viterbi : Yes
Soft decision : Yes
Bit error rate monitoring : Yes
Lock detector : Yes
Reed-Solomon : Yes
Turbo : Yes (CCSDS 131.0-B-3).
Scrambling : Yes
Interleave factor : Automatically programmed
 Turbo decoding Rates 1/2, 1/3, 1/4 and 1/6
Output up to 5 Mb/s
Block length 1784, 3568, 7136 and 8920 bits
 LDPC Decoding Rates 1/2, 2/3, 4/5, 7/8
Output up to 10 Mb/s
Block length 1024, 4096, 16384 bits for 1/2, 2/3, 4/5
7136 bits for 7/8
 CCSDS decommutation CADU & VCDU : Yes
 Telemetry storage on hard disk Time-tagged frames or blocks
 Telemetry replay Yes (TM data re-modulation by the TMS in Replay mode)
 Off-line telemetry transmission Yes (direct transfer to the LAN of stored telemetry)