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iSAFT Simulator SpaceWire / MIL-STD-1553
iSAFT Simulator

iSAFT SpaceWire / MIL-STD-1553 Simulator is an advanced EGSE platform with traffic generation capabilities that simulates SpaceWire / MIL-STD-1553 devices or instruments, enabling S/C integration tests before the availability of Flight Models.


The iSAFT SpaceWire / MIL-STD-1553 Simulator provides an 8 – 20 port SpaceWire interface with advanced traffic generation and asynchronous transmission capabilities and/or a 2 – 4 channel MIL-STD-1553 interface with BC and multiple RT simulation and Bus Monitoring capabilities. It is capable of transmitting/receiving data packets over multiple SpaceWire links and simulating a BC or multiple RTs over the MIL-STD-1553 buses, time stamping received packets, and capturing transmitted/received traffic to a powerful Protocol Analyser. It is based on the iSAFT graphical tool chain, for the configuration/management of the simulation (locally or remotely). The iSAFT simulator is a powerful device for the validation of on-board data networks at early stages, minimizing costs and schedule. It can be part of EGSE Data Front Ends and implement the core functionality of an EGSE controller.
Heavy duty HW platform with high processing power.
Asynchronous SpaceWire transmission, Bulk traffic generation, per packet programmable parity error injection.
1553 BC/Multiple-RTs emulation with error injection capabilities.
Synchronized SpaceWire/1553 transmissions, synchronization to external PPS/triggers as option.
IRIG-B002 interface with down to 8 ns accuracy/resolution for common time-stamping across all elements in a test-bed.
IRIG regeneration / level translation for IRIG signal propagation to cascaded iSAFT instance / other testbed equipment.
GUI for complete local operation (iSAFT graphical tool chain), remote control & operation through CCSDS/EDEN protocols.
Real-time statistics per port / channel.
Built-in recording function for received/transmitted packets.
Traffic logs export to XML, PostScript®, CSV, or plain text.
RMAP, CPTP, N-MaSS, ECSS-E-ST-50-13C services.
RMAP target with programmable response time down to sub-microsecond as option.
Open APIs for rapid prototyping of new protocol/device emulation functionality (C/C++, C#, Python).
Interfaces with EGSE Central Checkout System and RTS.
iSAFT Simulator Features
Based on an open architecture and modular design, the iSAFT Simulator is a future-safe, cost-effective and already validated solution for demanding AIT/AIV activities and EGSE. One (1) or multiple iSAFT SpaceWire / MIL-STD-1553 Simulators can be synchronized for simultaneous data transmission, traffic generation, traffic recording, interfacing to Central Checkout System (CCS)/SCOEs, thus completely replacing the need for multiple separated EGSE elements in your testbed (dedicated SpaceWire/1553 terminals, separate IRIG receivers/sources, dedicated stations for control, connection to CCS, etc.). It is fully compliant with all standards and certifications required to install it on a flight equipment/mission EGSE (FMEA, hazard/safety analysis, CE compliance, etc.).
General Features
Eight to twenty (8-20) SpaceWire ports, external triggers per port.
Link speed from 1 – 400 Mbps with 1 Mbps granularity, independently programmable per port.
Transmission of user packets unconditionally or upon the detection of programmable trigger event.
Programmable packet truncation on received packets.
Thirty-two periodic transmission channels capable of transmitting single packet or sequences of packets with subsequent independent transmission triggers.
Bulk traffic generation, transmission of Linkedlisted packets & repetitive packets/sequences, with microsecond accurate traffic shaping capability through independent transmission triggers per packet.
Hardware packet sinking for connected device transmission performance evaluation.
Trigger port event generation upon packet transmission/reception or link status event (connect, disconnect etc.).
iSAFT SpaceWire Features
Additional Features (Click to expand)
Transmission Triggers
Synchronized over several ports with time-offset.
Delay from previous packet.
Programmable signaling code, with time-offset.
Full or Partial IRIG time.
Link disconnect on another port.
External trigger(s) with/without time-offset (option).
EoP & EEP terminated Tx packets.
Asynchronous (user) Tx packets.
Bulk Traffic Generation Tx packets.
EoP & EEP terminated Rx packets.
Transmitted Signaling Codes.
Received Signaling Codes.
Port disconnects.
iSAFT SpaceWire Statistics
General Features
One to four (1-4) independent, dual redundant MIL-STD-1553 channels.
1553A and 1553B support.
Full function operation BC, BM and multiple RTs (1-31) simultaneously.
BC and RT simulation fully compliant with MIL-STD-1553B Notice II & IV.
Support of ECSS-E-ST-50-13C services during BC and RT simulation (time distribution, communication synchronization, get/set data, data block transfer and terminal management services).
Full BC and RT Data Block Transfer services implementation supporting all QoS (Best-Effort or Verified Length) and sub-addressing modes (Deep or Flat).
Statistics for ECSS-E-ST-50-13C services.
Full error injection and detection capabilities (at MIL-STD-1553B or ECSS-E-ST-50-13C services level).
Legal and reserved Mode Codes support.
Variable voltage support.
iSAFT 1553 Features
Additional Features (Click to expand)
RT Features
Static or circular user configurable data buffers.
Simulation of data, status and response time of each RT / TX or RX SA.
Full buffering of all Mode Codes supporting legal and reserved Mode Codes.
Programmable trigger Input/Output per received command or detected event.
1553A and 1553B Support.
Full Error Injection/Detection.
iSAFT RT Simulator
BC Features
Simple one-shot lists to advanced message framing and sub-framing capabilities.
Low and high priority aperiodic messages.
Multi branching per message, no-ops and delays support.
Message timing with 100 ns accuracy.
Up to 15 retries per message.
Programmable trigger input/output per message, PPS generation.
Programmable BC transmission based on trigger input.
Hardware Peripherals – Physical Interfaces
Site Rackmount System
2U/3U Rack Mounted System
High processing power, Heavy Duty Platform
256GB data storage
2TB date archive (expandable)
High reliability, high MTBF
Microsoft® Windows 64 bit
CE, EN55022, EN55024 certifications
iSAFT Rackmount System
Octal SpaceWire PCIe NIC
Full size PCIe form factor board
Eight SpaceWire Ports
Link speed 1 to 400Mbps
ANSI/TIA/EIA-644-A, 100 Ohms terminated
Standard SpaceWire 9-pins micro-miniature
IRIG-B002 generator/receiver TTL/RS-422 electrical levels, with down to 8 nano-seconds accuracy/resolution
Flight equipment protection against internal failures (FMEA available)
iSAFT SpaceWire NIC
Dual 1553 1Mbit PCIe NIC
1/2 Size 4 Lane PCIe board
2 Independent, Dual Redundant Channels (up to 4 per board)
Transformer bus coupling, Full Error Detection
Full Function Model: BC, BM and multiple RTs (1-31) simultaneously
Start-up, Loop-Back, User and Periodic BIT tests
IRIG-B002 receiver, 64-bit, 20 ns time stamp resolution
1 LVTTL Input and 1 Output Trigger per Channel
Fully Compliant to MIL-STD-1553B Notice II/IV
SAE AS4111/AS4112 protocol test as option
Trigger / Synchronisation Board
1/2 Size PCIe board
User-configurable mapping between trigger and SpaceWire/1553 ports
20 single-ended or 20 differential PPS/triggers
Support for TTL, BDM, LVDS and SBDL (RS-422), RS-485 standards
Synchronisation to external IRIG source, IRIG signal regeneration for connection to other testbed elements
Distribution of IRIG signal to all iSAFT interface cards
Flight equipment protection against internal failures (FMEA available)
iSAFT Trigger Board
Note: This page describes the full set of the iSAFT Simulator capabilities and features. Depending on specific iSAFT Simulator configurations, the supported features may vary.