Safran CORTEX CRT Quantum User Manual page 174

c- External Input to Viterbi Decoders (TMU table/offset 26 = 2. GUI: Frame Sync. Input = Ext. Vit.
1):
IF inputs
AQPSK
demodulator
Aux. inputs
& B/S
Figure 44: TM Chain : I/O Ports (HBW direct PCM AQPSK Decoding)
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© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
I in
I in
(Option)
I Viterbi
decoder
Q I
Viterbi
decoder
(Option)
Phase ambiguity is solved by the frame synchronizers or by the Differential Decoders when
available.
Test points and external input to the Frame Synchronizer or Viterbi Decoder are available if
two of the downlink data I/Os Test Sets are enabled. See section 2.3.4.2, Annex 5 and
TMU monitoring table, status offset 26 for more details.
Hard decision applies to external input to the Viterbi decoders (scenario c).
Auxiliary inputs: restricted to noise & spurious-free signal with limited amplitude variations.
Direct input to the Bit Synchronizer: Not available.
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It cannot be duplicated or distributed without expressed written consent.
Differential
decoder .
Differential
decoder
Differential
encoder
invert/
swap
I out
(Option)
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
.
Frame
Synchronizer
Frame
Synchronizer
Differential
encoder
invert/
swap
I out
(Option)
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