Safran CORTEX Series - Page 331

HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 331
PHASE ROTATION
Select CCSDS (Counter Clock Wise) or Inverted (Clock Wise)
RANDOMIZER
Type of Auto synchronized Randomizer
 Disable
 WorldView
 CCITT V.35
 IntelSat V.35
I/Q SHIFT
Allows adjusting the I/Q offset in OQPSK mode for test purposes
Enter any value from +0.5 to -0.5 (in symbol). Select 0 for optimal OQPSK (half-
symbol offset).
This parameter is not yet available
VITERBI ENCODING
VITERBI ENCODING Q
Convolutional encoder setting for the I and/or Q Channel
 OFF: disabled
 G1 – G2 Inv: G2 inverted (G1 first)
 G1 – G2: G2 normal (G1 first)
 G2 Inv – G1: G2 inverted (G2 first)
 G2 – G1: G2 normal (G2 first)
Refer to the CCSDS recommendations for “G2 normal/inverted” definition
VITERBI SCHEME
 Single – 1 I+Q: Single encoder common to I & Q Channels
 Dual – 1I / 1Q: Separate encoders for I & Q Channels
 XI / XQ: Separate encoders for I & Q Channels. X is the number of
parallel encoders
VITERBI PUNCTURING
VITERBI PUNCTURING Q
Puncturing setting for Viterbi encoding
 OFF
 ON (registry): defined in registry
 a/b (Conv. X): Puncturing a/b (convention 1 or 2)
 1/4 ESRIN
TCM ENCODER
TCM encoder for 8PSK modulation mode:
 OFF: disabled
 2.XX/3: 4D-TCM rate 2.XX/3
 DSNG 5/6
FILTER
Modulation Filter:
 Off
 RC
 RRC
 GMSK
 Custom
FILTER FILE
Only when Custom Filter is selected
ROLL-OFF
Roll-Off factor for the RC/RRC filter
BT
BT factor for the GMSK filter
SAMPLING
XSR: Enable the high rate filter at F
e
equal X times the Symbol Rate