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.
TCP-IP Data Recovery 3.4.11.3
In TCP-IP mode, up to 6 clients can connect to the telemetry port (port # 3075) for receiving real-time
or recorded data. Connected clients must send a data request specifying:
The data source (Data Processing Unit number: A, B or C),
The message size (number of TM Blocks per TCP-IP message)
The requested Virtual Channel(s), for CCSDS applications
The first TM Block to transmit: first block in the HDR real-time buffer or TM block with specified
time-tag (real-time or recorded data).
Next figure illustrates the data formatting for real-time and recorded TM Messages. See Annex 1, STI
100013_HDR Section 2.6 for more details on the Ethernet interface.
Header
PC RAM Buffer
for TM-A
X%
PC RAM Buffer
for TM-B
Y %
Free space
Z %
RAM Buffers
X, Y & Z defined in DRG table # 1
(applies also to disk partitioning)
~ 1 Gbytes
TM Packet # 1
TM Packet # 2
…
…
…
…
TM Packet # 7
TM Packet # 8
FIFO-structured
8 TM packets per buffer
(512-byte alignment)
Data storage in TM files on the hard disk
Number of TM packets per file : DRU table # 4
TM Block # 1
TM Block # 2
…
…
…
TM Block # N
TM Packet = N x TM Blocks
N is computed from
X% and frame size
or raw data
(8-byte words + filler
Up to 8 optional
spare words
DRU table # 23
Status (8 bytes)
SW Frame…
Time-tag (8 bytes)
TM Block :
TM Block size : up to 1,048,656 bytes
(DRU table # 35)
Frame size : up to 1,048,576 bytes
(DPU table # 3)
Real-time or recorded data to remote Ethernet Clients
Up to 131,072 TM Blocks per TM Message
Message preamble
& status
Real-time or recorded
TM Block(s)
Message postamble
TM Message
Recorded data playback
Real-time data
Figure 42: Data Transmission over TCP-IP. Message Formatting
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