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4Links Multi-link SpaceWire Recorder Version 4, User Manual

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4Links Multi-link SpaceWire Recorder Version 4 User Manual Download Page 33

 

 

 

Page 33 

 

8. Unit-to-Unit Time-Tag Synchronisation 

Multiple EtherSpaceLink units can be linked together to synchronize their internal clocks. This allows synchronised 
outputs across multiple boxes and time tags to be the same across multiple units. The hardware option “S” is 
required to provide the necessary SMA connectors on each unit that will be synchronised - e.g. MSR-RG408-MS. 

Units are synchronised with a daisy-chain cable between them - using rear-panel SMA connectors J7 and J8. 

These connectors are grouped in pairs (J1-J2, J3-J4, J5-J6 and J7-J8) with both connectors in a pair connected 
together (loop-through). In the following illustrations connectors J7 and J8 are interchangeable. 

Units to be synchronised are connected together by SMA-SMA cables, and 50 Ω terminators must be added at 
each end of the chain. The two connectors in a pair are simply wired to each other and may be used as a loop-
through connection, or a resistor may be inserted into one of the connectors so that the other forms a terminated 
connection. 

 

Summary of Contents for Multi-link SpaceWire Recorder Version 4

Page 1: ...Page 1 User Manual for the 4Links Multi link SpaceWire Recorder Version 4 ...

Page 2: ...European Space Agency whose rights are acknowledged and 4Links makes no claim to the word SpaceWire being a 4Links trademark The information supplied in this document is believed to be accurate at the date of issue 4Links reserves the right to change specifications or to discontinue products without notice 4Links assumes no liability arising out of the application or use of any information or prod...

Page 3: ...T Time Tags 12 2 4 2 ER Event Error Reporting 12 2 4 3 EW Event Error Waveforms 12 2 5 Front Panel Display 13 2 5 1 Ethernet information 13 2 5 2 SpaceWire information 13 2 6 Communication Protocols 14 3 Specification 15 3 1 SpaceWire Links 15 3 1 2 SpaceWire Connectors 15 3 1 3 SpaceWire Time Codes 16 3 2 The Ethernet Connection 17 3 2 1 ICMP Echo ping Support 17 3 2 2 Full Duplex Ethernet 17 3 3...

Page 4: ...sation 30 6 3 Health Display 30 7 The MSR Options 31 7 1 Option TT Time Tags 31 7 2 Option ER Event Error Reporting 31 7 3 Option EW Event Error Waveforms 32 8 Unit to Unit Time Tag Synchronisation 33 8 1 Setting the Synchronisation Source 35 9 Software for the Multi link SpaceWire Recorder 38 9 1 Files Supplied with the MSR 38 9 2 Data Capture using the msr Program 39 9 3 Data Inspection and Anal...

Page 5: ...2 Security Notice 49 12 Product Limitations and Features 49 13 Regulatory Information 50 13 1 Electromagnetic Compatibility 50 13 2 Product Safety 50 13 3 Equipment Recycling 50 13 4 Restriction of Hazardous Substances 50 14 RG408 Product Drawings 51 14 2 Front view 51 14 3 Rear view 52 ...

Page 6: ...manage and search the recordings The basic MSR RG40x unit provides data recording facilities event reporting and time tag capture for some or all of the tokens in the SpaceWire streams It may be extended with an option to provide waveforms that show the precise state of the SpaceWire signals around the time that an error was detected This optional capability can be added as a simple field upgrade ...

Page 7: ...ove covers Do not operate with suspected failures If you suspect that there is damage to this product refer to 4Links for advice Do not operate in wet or damp conditions Do not operate in an explosive atmosphere Keep product surfaces clean and dry Provide proper ventilation The air inlet and outlet on the rear panel must not be obstructed 1 1 Terms in this Manual Caution Caution statements identif...

Page 8: ...Page 8 1 2 Symbols on the Product The following symbol may appear on the product Caution Refer to this user manual for safety information ...

Page 9: ...r falls into two distinct phases Data Capture when SpaceWire traffic is collected time tagged and stored to a file on the host computer and Data Inspection and Analysis which is performed after the data has been captured 2 2 Getting Started The MSR is supplied with up to eight active SpaceWire connectors ports Each pair of adjacent ports allows a bidirectional SpaceWire connection a link to be mon...

Page 10: ... for the Multi link SpaceWire Recorder which discusses the data capture and analysis phases in more detail and provides further examples 2 3 Standard MSR Capabilities All Multi link SpaceWire Recorders include the following capabilities The ability to capture all of the traffic passing along one two or four bidirectional SpaceWire links and to relay it across Gb s Ethernet to a host computer The S...

Page 11: ...ta stream The MSR therefore needs to be booted before the link is connected but not necessarily running the msr software yet If for any link the MSR s front panel display shows the link speed in each direction as well as the exchange of NULL tokens flow control tokens or data characters as in figure 2 3 then it will be able to record from that link Traffic on SpaceWire links with speeds up to 400 ...

Page 12: ...it synchronisation or an Absolute Time Interface ATI unit the time tags recorded by most members of the 4Links EtherSpaceLink family may be synchronised to an accuracy of better than 10 ns 2 4 2 ER Event Error Reporting SpaceWire tokens defined as errors that would normally be hidden typically resulting in a link reset or replaced by an EEP character can be made visible for recording purposes 2 4 ...

Page 13: ...nitors and displays the states of the Ethernet and SpaceWire links The top line of the display shows the product number the current IP address of the EtherSpaceLink unit and the name 4Links on the right Figure 2 3 The MSR display 2 5 1 Ethernet information Information about the remote Ethernet connection is shown on the upper section of the display The status of the Ethernet connection is provided...

Page 14: ...removed and reconnected In the event of an EtherSpaceLink unit being powered down the computer will expect the connection to be restored but the EtherSpaceLink unit will have lost connection information and the computer application program will have to be restarted Similarly a failure of the computer will leave the EtherSpaceLink unit waiting for a connection restoration that is not possible and i...

Page 15: ...l on RG R platforms The connectors are labelled 1 to 8 from left to right corresponding to software and API ports 1 to 8 respectively The pinout of the SpaceWire socket connectors looking from the outside of the EtherSpaceLink unit is shown in figure 3 1 Figure 3 1 SpaceWire connector pinout The female Din and Sin contacts provide inputs to the MSR the female Dout and Sout contacts carry output si...

Page 16: ...Page 16 3 1 3 SpaceWire Time Codes SpaceWire defines a mechanism for transferring a global time reference across a network MSR stores these time codes in its recorded data files for analysis ...

Page 17: ...its with the S model number suffix where they are fitted The rear panel of a suitably equipped MSR contains eight SMA connectors labelled J1 to J8 from left to right when looking at the rear panel corresponding to software and API synchronization connections J1 J8 respectively These connectors are used as four pairs J1 J2 J3 J4 J5 J6 and J7 J8 Connector pairs J1 J2 J3 J6 or J7 J8 may not be presen...

Page 18: ... 4 Summary of MSR Options for further information on the available MSR options 3 5 The RG408 Hardware Platform The RG408 hardware platform is supplied with eight SpaceWire ports and with front or rear mounted SpaceWire connectors RG408 or RG408 R respectively The hardware is optionally available with SMA connectors for external synchronization on the RG408 S These enable inter box time tag synchro...

Page 19: ...ation grilles to allow the internal fans to operate efficiently and thus to allow operation across the temperature range specified in section 3 5 2 Environmental Requirements above 3 5 3 Power Supply Power is provided by an external supply 3 5 3 1 Supply Voltage The power input is designed to accept DC 22 to 50 V with either polarity The power input circuit is isolated from both the rest of the ci...

Page 20: ...mber of active ports and options up to around 25W 3 5 3 3 Power Connector Power is supplied using a rear panel mounted 5 way 240 DIN connector with a screw locking mechanism Figure 3 3 The 4Links RG Platform power connector Pins Function 1 2 Power either polarity 3 Functional ground connected to case 4 5 Return The connector type is a Binder 680 series 5 pin 240 chassis plug A compatible mating co...

Page 21: ...fore replacing these fuses In the event of suspected fuse failure please contact 4Links Caution There are no user serviceable parts inside this equipment 3 5 4 Handling and Transportation The 4Links RG platform products are designed to be robust and are capable of being transported to support SpaceWire testing Units should be packaged in protective foam or similar material to prevent them from bei...

Page 22: ...d by pressing the eject button on the right hand side of the card slot with a non conductive device Caution Do not attempt to remove the memory card using a conductive object e g a pen or a screwdriver Memory cards are configured for a particular 4Links hardware platform and are only intended for use with that unit If one attempts to boot a 4Links unit with a memory card that was built for another...

Page 23: ...Page 23 Figure 4 1 EtherSpaceLink family unit block diagram ...

Page 24: ...s display In normal operation the display shows the state of the SpaceWire and Ethernet connections and any activity on these interfaces Figure 5 2 The MSR status display The top line of the display shows Ethernet information The IP address of this unit Ethernet status The SFP module see section 3 2 The Ethernet Connection is not present X The SFP module is present but the Ethernet cable is not co...

Page 25: ...his port X A link disconnection i e timeout was observed on this port P A parity error was observed on this port Each of these status indication characters is displayed for a short length of time to make them visible to the human eye Receive link speed The above display shows that the unit is listening for an Ethernet connection on IP address 192 168 3 40 and that the SpaceWire link passing betwee...

Page 26: ...e direction Doing nothing will after a few seconds cause the display to return to normal Messages on the screen indicate the effect of moving the switch upwards top line left side or downwards bottom line left side After pushing the switch down we see that the MSR serial number A202 with all options is not time synchronised to other EtherSpaceLink units is connected to a 100 Mb s Ethernet and that...

Page 27: ...itions After self test and configuration the display enters its normal status display mode From there pushing the switch in either direction shows the configuration display and pushing it again in the same direction will return to the main status display Selecting the Settings display with two operations of the switch in opposite directions and doing nothing will result in all the settings being d...

Page 28: ...Page 28 ...

Page 29: ...Page 29 Figure 6 3 MSR front panel states ...

Page 30: ...settings for the time synchronisation between EtherSpaceLink units Synchronise to another unit s reference time Provide the time reference source for other units Remain isolated and generate time tags locally For further details see section 8 Unit to Unit Time Tag Synchronisation Figure 6 6 The time synchronisation display 6 3 Health Display The Health Display provides a frequently updated view of...

Page 31: ... time tags are used when the interval between time tags is short 6 5µs which reduces the Ethernet size of a time tag from ten to four bytes and thus reduces the traffic generated by time tags The time tags recorded by the MSR may be synchronised with those of other 4Links MSRs DSIs and SRRs to an accuracy of better than 10 ns and all of these may be synchronised to a time of day year IRIG B00x clo...

Page 32: ...apture of a waveform when an error is detected and the MSR considerably extends the triggering opportunities Each port can generate an event when one or more of the following have been enabled and subsequently occur The first byte of a packet is received The error end of packet marker EEP is received Time codes are received ECSS errors ESC ESC ESC EOP ESC EEP Timeout Parity error are received Some...

Page 33: ...isy chain cable between them using rear panel SMA connectors J7 and J8 These connectors are grouped in pairs J1 J2 J3 J4 J5 J6 and J7 J8 with both connectors in a pair connected together loop through In the following illustrations connectors J7 and J8 are interchangeable Units to be synchronised are connected together by SMA SMA cables and 50 Ω terminators must be added at each end of the chain Th...

Page 34: ...Page 34 Figure 8 1 Daisy chaining the time synchronisation connections T indicates a 50 Ω SMA termination The total length of cable used in the daisy chain must not exceed 50m 165 feet ...

Page 35: ... all of the others can be left at their default setting to cause them to synchronise their timetags to that unit Notice that if the power to a unit is cycled or if its memory card is unplugged and then reinserted and it was the time reference for a chain of EtherSpaceLink units then this capacity must be set again on the unit s front panel Figure 8 2 Time synchronisation display Synchronisation st...

Page 36: ...Page 36 Figure 8 3 Indication of the time synchronisation status ...

Page 37: ...t the Ethernet interface is listening for a connection An EtherSpaceLink Absolute Time Interface ATI that synchronises time tags to an IRIG B00x source is available from 4Links It should be included as one of the units in the chain above If there is an ATI in the chain it is by default the synchronisation master All other EtherSpaceLink units should then be set to Synchronise to reference ...

Page 38: ...ulated and described below File Contains msr exe The msr recording program compiled for MS Windows See section 9 2 Data Capture using the msr Program for details read jar The Java based read analysis tool that interprets binary files that were recorded by the msr program See section 9 3 Data Inspection and Analysis using the read Program for details waveform jar A Java based analysis tool that int...

Page 39: ...s as a bridge between the MSR unit and the file on the host computer At high data rates this is a challenging task and the capabilities of the host computer are likely to be a greater bottleneck to the recording than the MSR hardware The following notes might be helpful when optimising your test environment Data has to be stored as it arrives it is not possible for the recorder to control the Spac...

Page 40: ...pplied filename for the recording may not contain the usual path components so one must set the current working directory to that which will contain the recorded file before running the read program If the supplied filename starts with a non alphabetic first character it will be treated as an IP address in which case the dotted decimal IP address of an MSR device will be opened for live streaming ...

Page 41: ...reports EOP EEP on the last or only line of data instead of a line of its own The default is 16 bytes per line l string Label the ports with substrings of string o filename Direct the result to the file filename The default is to display the result on the screen c connector s Select data only from the specified incoming connectors e g c 2 extracts only data flowing from connector 2 to connector 1 ...

Page 42: ...ely after making a recording to obtain a summary of the stored data If the traffic contains SpaceWire packets longer than 2048 bytes adding the b length parameter prevents the summary line for each packet from being broken over multiple lines of output ...

Page 43: ... Plug ins for the read Program The usual function of a plug in is to examine a received packet and if it is recognised to interpret it for display A plug in file is provided for the read program to provide interpretation of the SpaceWire RMAP protocol ProtocolRxRMAP class This plug in may be invoked using the p parameter to the read program java jar read jar filename p RMAP 4Links READ v16 2011112...

Page 44: ...ultiple SpaceWire ports event waveforms for all of the ports will be stored in the recorded file in an interleaved fashion After viewing a waveform it will be necessary to follow the prompt to close the pop up window for the correct port in order to view the next event waveform Added Rx protocol RMAP v13 20111125 from ProtocolRx_RMAP 4Links READ v16 20111125 v33 20110920 run by test user on 2012 0...

Page 45: ...Page 45 Figure 9 1 SpaceWire waveform capture of a Link changing speed from 10 Mbps to 100 Mbps ...

Page 46: ...ion across the Ethernet The need to accommodate SpaceWire packets of unlimited length The need to compress values such as time tags to minimise the file size The need to do all of this really fast 4Links reserves the right to change the MSR file format If this happens the msr and read jar programs will be updated to reflect these changes and thus provide the stable supported interface for this pro...

Page 47: ...casionally as broadcast traffic is seen on the network I cannot monitor traffic on one of the MSR unit s ports Does the MSR unit s front panel display show that the link is connected Are the R and or the T indicators flashing for this link If just the N and X indicators are lit continuously one side of the link is trying to connect repeatedly without success How many ports are supported on your MS...

Page 48: ...the disk on your host computer My SpaceWire link s are disconnecting unexpectedly Is your device under test properly grounded to your DSI SpaceWire requires a ground reference to be connected through the outer shield of each SpaceWire cable If this is not done the common mode potential might be too high leading to seemingly random errors or sensitivity to external electromagnetic interference The ...

Page 49: ...front panel switch to set the IP address to 0 0 0 0 2 Remove the memory card 3 Remove power from the unit No user dependant value or data now resides in the unit 11 2 Security Notice The configuration files stored on the memory card define the function of the unit These are encrypted and can be used only with the specific unit they were created for The data on the card cannot be used to configure ...

Page 50: ...equipment Compliance has been demonstrated to the following specifications as listed in the Official Journal of the European Union and by the International Electrotechnical Commission IEC IEC 61010 1 2010 3rd Edition and EN 61010 1 2010 3rd Edition with US Canada National Deviations 13 3 Equipment Recycling The symbol shown in figure 13 1 indicates that this product complies with the European Unio...

Page 51: ...s 14 1 Plan view Plan view with front SpaceWire connectors and rear SMA connectors not to scale Figure 14 1 RG408 plan view with rear SMA connectors Plan 14 2 Front view Front view with front SpaceWire connectors not to scale ...

Page 52: ...Page 52 Figure 14 5 RG408 front view 14 3 Rear view With front SpaceWire and rear SMA connectors not to scale Figure 14 7 RG408 rear view with SMA connector ...

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