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Contents
1. PaZEIEEIS j i E NE NE ima sesa Qu DPOCUMENT document title titre du document ENVISAT DDS RECEIVER USER MANUAL prepared by pr par par Bernhard COLLINI NOCKER GCS reference r ference ENVI GSEG EOAD MA 01 0005 issuel dition 1 revision r vision 1 date of issueldate d dition 26 November 2001 status tat Issued Document typeltype de Manual document Distribution d stribution Envisat DDS Users European Space Agency Agence spatiale europ enne ESRIN ENVI GSEG EOAD MA 01 0005 Via Galileo Galilei Casella Postale 64 00044 Frascati Rome Italy Iss 1 1 RX Sites User Man doc Tel 39 06 941801 Fax 39 06 94180 280 C eC Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 2 of 35 APPROVAL Title Envisat DDS Receiver User Manual issue revision 1 titre issue revision Author Bernhard COLLINI NOCKER GCS date 26 11 2001 auteur date Approved by Stefano BADESSI ESA D EEM ADU date 27 11 2001 approuv by date Approved by H Ludwig MOELLER ESA D EEM P date 27 11 2001 approuv by date CHANGE LOG reason for change raison du changement issuelissue revisionlrevision dateldate Initial Issue 1 0 01 10 30 Add satellite downlink parameters 1 1 01 11 26 CHANGE RECORD ISSUE 1 REVISION 1 reason for changelra son du changement page s page s paragraph s paragraph s Add satellite2. 0 5681 MHz Signal Noise Ratio 17 8618 RSC Error 0 RSUCE Error 13961 Channel Bit Error Rate 0 1051 SYSTEM summary HELP Active PIDs 230 231 Serial Number OxOOO000000000000003001EA4C1 Manufacturer ID 14F3 Hardware Version G1 Firmware Version 7 6 16 Version 7 0 1 Product Name 2030 16 Number 2030 ABA NIC Driver Running Running Internet Specifically look for Signa se Ratio It should be between 4 and 8 depending on weather and outdoor conditions If the value is negative please immediately take actions as indicated in chapter Troubleshooting e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 25 of 35 The additional information about the DVB interface provides a summary of DVB packets received via this interface d ENVISAT Microsoft Internet Explorer EE ioj xl File Edit View Favorites Tools Help esxk gt A search Favorites History ES 3 w E 2 Links 2 f ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Vy RXPC name rxpc002 simple at INTRAY Link encap Ethernet HWaddr 00 D0 72 01 E4 C1 inet addr 10 2 0 1 Bcast 10 255 255 255 Mask 255 255 255 0 OUTIRAY UP BROADCAST RUNNING MULTICAST MTU 1500 Metric 1 RX packets 167498562 ernors 426 dropped 54731 overruns 0 frame 426 RECEIVER LOGS TX packets 0 errors 0 dfpped 12125 overruns 0 carrier 0 collisions 0
3. 39 06 94108272 E mail eohelp esa int last updated 2001 06 23 DISK CLEANUP DVB RX Interface SYSTEM summary HELP dep Internet NOTE that the second line in most of the following pages contains a status line where the most important operation modes are summarised DVB CHECK or OK DISK CHECK or OK LANFWD OFF or ON CLEANUP OFF or ON For convenience reasons the modes in green indicate OK whereas red indicates that either some action is required or a mode is not enabled The following example screen shall be interpreted as follows C e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 14 of 35 e The DVB status is red This tells that no proper signal transmitted by the satellite is actually received by the RX PC This means that the DVB carrier is down or the RX site has lost the signal due to antenna LNB or cabling problems e The DISK status is green Enough disk space is available for new products If the DISK status is red then products need to be downloaded from the RX PC and or deleted in order to preserve space e The LANFWD status is red indicating that this option is not enabled Under LAN FORWARDING this feature can be configured enabled and performed e CLEANUP status is green telling that products older than a given number of days will automatically be discarded Under CLEANUP this value can be configured 6 1 1 INTRAY Under INTRAY all p
4. SYSTEM summary DP 20010809100512 ASA WVI IPXPDE19970107 061135 000015004018 00097 08614 0003 N1 DP 20010809100513 ATS NR 2PTRAL19950510 071649 00000000X000 00000 00000 0000 N1 DP 20010809100513 ATS TOA IPTRAL19950510 071649 00000000X000 00000 00000 0000 N1 DP 20010809100513 GOM EXT 2PNACR19960620 101218 000000631001 00001 00001 0000 N1 DP 20010809100513 GOM EXT 2PNACR19960620 101445 000000441001 00001 00001 0000 N1 DP 20010809100513 GOM EXT 2PNACR19960620 101547 000001751001 00001 00001 0000 N1 DP 20010809100513 GOM EXT 2PNACR19960620 104237 000000391001 00001 00001 0000 N1 DP 20010809100513 GOM EXT 2PNACR19960620 105240 000000451001 00001 00001 0000 N1 r DVB RX Interface HELP Internet The table displays two columns Reference channel from which the product has been received and timestamp of the deletion event YYYYMMDDHHMMSS Product is the name and the deleted product e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 18 of 35 6 1 4 OUTTRAY CLEANED Click Failed to get a list of the latest 100 failed products An error code for any of the envisaged reasons for reception failure is provided 2 ENVISAT Microsoft Internet Explorer lt loj x File Edit View Favorites Tools Help Bak gt Q A search Favorites History ES gt gt Links ie f ENV
5. e If however products are not downloaded and subsequently removed by the User the Envisat Monitoring system will get an alarm default 90 and may be forced to enable this procedure e If for any reason the User requests this procedure to be activated it will be e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 31 of 35 7 ON SITE MAINTENANCE ZI User tasks In order to keep the receiving system in the nominal configuration status the User should regularly perform the following tasks NR Frequency Task Pass Criteria 1 Daily Web DVB RX Interface gt Status S N in range 2 Daily Web GENERAL gt Status File system in range 3 Daily Web INTRAY No errors 4 Daily FTP download of products Enough disk space The performance of above tasks takes less than a couple of minutes except for the FTP download of products The performance of such tasks is mandatory for reliable operation of RXPC Should any of the previous check result to fail the user should immediately refer to the DDS assistance HelpDesk as described in chapters 8 and 9 8 REMOTE MAINTENANCE The DDS takes care about remote monitoring operations and configuration control Essentially remote connect via SSH and polling trapping via SNMP are used to perform maintenance tasks and monitor essential status and functional status No User interaction is foreseen fo
6. 20010326143917 2001 03 26 14 39 20 Using interface 10 2 0 1 to receive data from 229 1 1 1 keyfile 20010326143917 2001 03 26 14 39 20 Able to receive encrypted files with key keys keyfile 20010326143917 keyfile 20010326143917 2001 03 26 14 39 20 filter accepted GOM RR 2PNPDE20000619 201855 00000074A001 00171 00168 0000 N1 keyfile 20010326143917 2001 03 26 14 39 20 config RRMP configuration for Envisat keyfile 20010326143917 2001 03 26 14 39 20 Reading encryption key from file keys keyfile 20010326143917 keyfile 20010326143917 2001 03 26 14 39 20 1010326143918 985610358 O0 GOM RR 2PNPDE20000619 201855 00000074A001 00171 00168 0000 N1 keyfile 20010326143917 2001 03 26 14 39 20 Error in mc recv 7 10075 keyfile 20010326143917 2001 03 26 14 39 20 receiver identified as crying baby because it exceeds max NAKs per second exiting keyfile 20010326143917 2001 03 26 14 39 28 ABORTED The lines in bold say that due to reception problems max NAKs per second exceeds threshold the reception was aborted Potential other reasons for failed product dissemination are e percentage of NAK per product exceeded e max NAKs exceeded In any case check whether cabling is ok and antenna is in good shape Cross check with the Status of DVB RX Interface e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 35 of 35 9 4 SAMPLE Problem Report This is the preliminary proposed form
7. FTP file from the respective service subdirectory In the following two potential problems are explained in more detail 9 3 1 INTERNET CONNECTION PROBLEM The output looks similar to this keyfile 20010328110934 2001 03 28 11 23 17 RRMP version 3 2 3 loaded keyfile 20010328110934 2001 03 28 11 23 17 Using interface 10 2 0 1 to receive data from 229 1 1 1 keyfile 20010328110934 2001 03 28 11 23 17 Able to receive encrypted files with key keys keyfile 20010328110934 keyfile 20010328110934 2001 03 28 11 23 17 filter accepted ASA GM BPZPDE20000619 223807 00000900A001 00173 00170 0003 N1 keyfile 200103281 10934 2001 03 28 11 23 17 End of transmission keyfile 20010328110934 2001 03 28 11 23 17 Replying report to 193 204 235 88 port 10011 keyfile 20010328110934 2001 03 28 11 23 17 report connect Invalid argument keyfile 20010328110934 2001 03 28 11 23 17 Cannot open client socket to report back to the sender keyfile 20010328110934 2001 03 28 11 23 17 ABORTED The lines in bold mean that the RX PC at the end of a product dissemination could not send the related dissemination report to DDS The user should immediately inform the DDS HelpDesk 9 3 2 RECEPTION PROBLEM The output looks similar to this e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 34 of 35 keyfile 20010326143917 2001 03 26 14 39 20 RRMP version 3 2 3 loaded keyfile
8. and timestamp of the forward event YYYYMMDDHHMMSS Product is the name and link to the product if it is still locally stored e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 17 of 35 6 1 3 OUTTRAY CLEANED Click Cleaned to get a list of the latest 100 cleaned products E ENVISAT Microsoft Internet Explorer E E E n xj File Edit View Favorites Tools Help Bak gt A search Favortes CBristory ES J 2 Links ia Z ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Z RXPC name rxpc002 simple at INTRAY ENVISAT OUTTRAY AUTOMATICALLY DELETED FILES OUTTRAY rxpc002 2001 08 09 10 11 32 DVB CHECK DISK OK LANFWD OFF CLEANUP ON LAN Forwarded Cleaned Failed reference product message DP 20010809100511 ASA APM IPTPDEI19950820 103150 000001204004 00234 01737 0023 N1 RECEIVER LOGS DP 20010809100511 ASA APP IPVPDE20011221 103440 000000154031 00067 15598 0027 N1 LAN FORWARDING DP 20010809100512 ASA GMI IPNPDK19980903 100719 000009004024 00180 11700 0059 N1 DP 20010809100512 ASA IMG 1PXPDE19960508 211733 000000004131 00333 65463 0021 N1 DISK CLEANUP DP 20010809100512 ASA IMMM IPXPDE19960129 190257 000001624009 00053 04061 0176 N1 DP 20010809100512 ASA IMP 1PXPDEI19951103 220344 00000016G007 00252 22505 0015 N1 DP 20010809100512 ASA WSM IPNPDK19980903 103156 000000604024 00180 11700 0096 N1
9. for the problem reporting to be sent electronically to the DDS HelpDesk ESRIN EOhelp Working hours 08 30 17 15 Tel 39 06 94108777 Fax 39 06 94108272 E mail eohelp esa int SITE NAME Person Tel E mail Date Time Description of the problem
10. txqueuelen 0 Interrupt 11 Memory d5ai 4o00 d5ai5000 AN FORWARDING DISK CLEANUP Thu ug 9 10 45 57 CEST 2001 Configure xl E Done Internet Most of these numbers are useful for system debugging The user should just verify that during normal operations the number of errors should be reasonable small compared to the number of RX packets e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 26 of 35 6 1 11 GENERAL SYSTEM SUMMARY Click System summary to obtain the list of files systems and necessary processes ZA ENVISAT Microsoft Internet Explorer 3 I D x File Edit View Favorites Tools Help Bak gt A search Favortes History ES amp HBH E 9 Links lt 4 ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Uy RXPC name rxpc002 simple at INTRAY ENVISAT SYSTEM SUMMARY OUTTRAY rxpc002 2001 08 09 10 50 04 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS Linux Version 2 2 14 AN FORWARDING Compiled 6 SMP Fri May 25 12 43 07 CEST 2001 S806HMHz Intel Pentium III Processor 256M RAM DISK CLEANUP 804 45 Bogomips Total Configure rxpcO02 Perform cleanup Linux Mandrake release 7 2 Odyssey for i586 Kernel 2 2 14 on an i686 X1 DVB RX Interface uptime 10 50am up 44 days 5 14 1 user load average 0 00 O Filesystem 1k blocks Used Available Uses Mounted on dev sdal 2055600 92616 1879448
11. 002 2001 08 09 09 59 36 DVB CHECK DISK OK LANFWD OFF CLEANUP ON reference product message DP 20010721174901 RA2 FGD 2PTLOP20000620 000000 00000100X000 00000 00000 0000 N1 DP 20010721174902 RA2 FGD 2PTLOP20000620 110037 000005544001 00180 00177 0000 N1 DP 20010721174905 RA2 FGD 2PTLOP20000620 110854 00006699X000 00000 00000 0000 N1 DP 20010721174928 RA FGD 2PTLOP20000620 111539 000004884001 00180 00177 0000 N1 DP 20010721174933 RA2 FGD 2PTLOP20000620 231233 00005862X000 00000 00000 0000 N1 DP 20010721174953 RA2 MWS 2PTLOP20000620 000000 00000100X000 00000 00000 0000 N1 DP 20010721174958 RA2 MWS 2PTLOP20000620 110037 000005544001 00180 00177 0000 N1 DP 20010721175013 RA2 MWS 2PTLOP20000620 110854 000066099X000 00000 00000 0000 N1 DP 20010721175158 RA2 MWS 2PTLOP20000620 111539 000004884001 00180 00177 0000 N1 DP 20010721175208 RA2 MWs 2PTLOP20000620 231233 00005862X000 00000 00000 0000 N1 DP 20010721175337 RA2 MW IPTI P20000620 120000 000000004001 00100 15500 3333 N1 DP 20010721175349 RA2 MW IPTI P20000620 120000 000000004001 00100 15500 5555 N1 DP 20010721175406 RA2 WWV 2PTLOP20000620 000000 00000100X000 00000 00000 O000 N1 DP 20010721175406 RA2 WWV 2PTLOP20000620 110037 000005544001 00180 00177 O000 N1 Internet The table displays two columns Reference channel from which the product has been received
12. 5 dev sda8 10950140 289004 10216140 359 home HELP dev sdas 2055600 619032 1353032 31 usr dev sda6 2055600 49744 1922320 35 var SYSTEM summary 23284 pts 2 23300 pts 2 20611 pts 2 20613 pts 2 20615 pts 2 20692 pts 2 20693 pts 2 20694 pts 2 10 perl home envisat db rx im pl 01 perl home envisat dp rx im pl 00 home envisat db receiver k9002 00 home envisat db receiver k9002 02 home envisat db receiver k9002 00 home envisat dp receiver k9102 00 home envisat dp receiver k9102 02 home envisat dp receiver k9102 tQ tQ uQ tQ tQ un tQ tn coooooooo Thu Aug 9 10 50 04 CEST 2001 kl M nJ Sp Internet The line starting with uptime tells you the time since when the system is up and running If for any reason this does not correspond with the time the system was delivered and taken into operation it indicates a severe malfunction or power loss In this case please notify the HelpDesk The lines below Filesystem indicate the free space on RX PC The column Use should always be below 90 to guarantee optimal performance The green underlined lines indicate the RX intray directory where the products are stored e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 27 of 35 6 2 FIP In addition to the LAN forwarding utility which has been described in chapter 7 1 6 two other ways to transfer da
13. I P20000620 120000 000000004001 00100 15500 5555 N 7479296 ATS NR 2PTRALI19950510 071649 00000000X000 00000 00000 0000 N 22732800 ASA GM1 1PNPDK19980903 100719 000009004024 00180 11700 0059 1 The table under the status line has three columns e Reference provides a pointer to the transmission reference channel type DP DB date time of data arrival YY YYMMDDHHMMSS Size is the corresponding size of the product in Bytes e Product Message provides the name of the product 6 1 2 OUTTRAY LAN FORWARDED Click LAN Forwarded to get a list of the latest 100 successfully forwarded products from the RX PC toward the final User destination system The listed products may be either been already removed from the hard disk written in italics or still on the disk if the deletion was not activated or the file retransmitted Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 16 of 35 2 ENVISAT Microsoft Internet Explorer I xl File Edit View Favorites Tools Help amp esxk gt Q A Search Favorites History ES 3 E 9 Links fresa iz I INTRAY OUTIRAY LAN Forwarded Cleaned Failed RECEIVER LOGS LAN FORWARDING DISK CLEANUP DVB RX Interface SYSTEM summary HELP ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 RXPC name rxpc002 simple at ENVISAT OUTTRAY FORWARDED FILES rxpc
14. ISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 RXPC name rxpc002 simple at E ENVISAT OUTTRAY FAILED FILES OUTIRAY LAN Forwarded rxpc002 2001 08 09 10 13 10 DVB CHECK DISK OK LANFWD OFF CLEANUP ON Cleaned Failed reference product message RECEIVER LOGS DP 20010806123238 MER RR BPNPDE20000619 214148 000002701001 00172 00169 0008 N1 DP 20010806123238 Timeout in mc recv 3 10060 LAN FORWARDING DISK CLEANUP Error Codes and meaning f f f f 1 NIE DE E EE Timeout in mc recv 7 10060 Receiver did not get data for a timeout period Error in mc recv 7 10074 Receiver identified as crying baby because it sent too many NAK Error in mc recv 7 10075 Receiver identified as crying baby because it sends more NAKs s Error in mc recv 7 10076 Receiver identified as crying baby because it exceeds the NAKs SYSTEM summary report connect Invalid argument Receiver could not send the report DVB RX Interface HELP Thu Aug 9 10 13 10 CEST 2001 NOTE that the corresponding error codes and their meaning are displayed at the end of the page e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 19 of 35 6 1 5 RECEIVER LOGS HIGH SPEED DP AND LOW SPEED DB LOGS Click High speed Log to obtain the last TBD status messages for the high speed channel An entirely similar page may be obtained clicking Low speed Log Z ENVISA
15. LED is visible even when pinging the RX PC from a remote computer this indicates either a hardware defect cable switch hub card or a software configuration problem of that interface e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 33 of 35 9 2 DVB Card operation Verify that RX PC BL2030 16 is locked and signal strength and error ratio are in line with the normal clear sky operational values which are S N around 7dB and channel BER around 0 009 These values can be verified checking the output of DVB RX Interface gt Status at the RX PC service home page see chapter 7 1 10 The HTTP page should be loaded several times at a distance of 10 minutes as the operation may coincide with one uplink station hand over when no carrier is available over the transponder Collect all the values disregard the maximum and minimum and average the others taking also note of the external weather conditions i e clear sky cloudy rainy severe gale If the station is permanently in no lock status then the user should first verify that the RF cable is properly connected to the F connector in the rear panel on one side and to the LNB antenna on the other side Should the card result instead permanently in signal and data lock status then the user should proceed with the additional verification of next chapters 9 3 Examination of LOGFILES Download the files rx rx log and files log via
16. Observation Missions Helpdesk OUTTRAY ESRIN Casella Postale 64 RECEIVER LOGS 1 00044 Frascati Italy LAN FORWARDING Working hours 08 30 17 15 DISK CLEANUP Tel 39 06 94108777 Fax 39 06 94108272 E mail eohelp esa int SYSTEM summary last updated 2001 06 23 DVB RX Interface HELP n Internet In the top frame links to the respective home pages of ESA and ENVISAT are accessible In the left frame the navigation is accessible In the right frame the contents of the respective command is visible e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 13 of 35 Upon first connect the service presents the ESRIN HELPDESK co ordinates Note that the menu in the left frame some of the menu OUTTRAY LAN FORWARDING and DISK CLEANUP items are collapsed for readability Upon clicking on the respective menu item the menu sub items appear A ENVISAT Microsoft Internet Explorer E I mi xi File Edit View Favorites Tools Help Back gt A search Gyravorites History ES gt i t Links f ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 W RXPC name rxpc002 simple at INTRAY EOHelp ESA Earth Observation Missions Helpdesk Sais ESRIN Casella Postale 64 RECEIVER LOGS 1 00044 Frascati Italy LAN FORWARDING Working hours 08 30 17 15 Configure Tel 39 06 94108777 Perform forward Fax
17. RF unit is composed by a typical TV broadcast external unit The current ESA provided installation is based upon a Fracarro RO120N 120 cm single offset antenna to achieve good link availability A Norsat digital LNB type 4208B is used because it provides both more signal gain and improved frequency stability Note that in contrary to a universal LNB the Norsat has a fixed LO frequency of 11 3 GHz and therefore does not switch to high band neither with 22KHz nor with higher voltage Figure 1 Typical RX RF external unit installation The LNB shall be connected to the receive card in the RX CU via a low loss coaxial cable of 30m maximum length For longer path a line amplifier may be required although it is recommended the use of a lower loss professional coax cable It is assumed the antenna to be accurately pointed in order to achieve full DDS performance Routinely maintenance will be foreseen for BERs checking 43 RX PC CU e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 9 of 35 The RX PC CU is a Pentium III 800MHz based PC running the Linux operating system The chassis is a standard 1U rack mount Size is W 44cm L 49 cm and H 5 cm Some clearance e g 10 cm would be needed in the rear as the coax cable connection is in line The Linux distribution is Mandrake 7 2 based on 6 2 plus some patches and security enhancements with kernel 2 2 14 newer kernels are unfortunately
18. Remote Site none envisat www db 5 RAZ_MWS 2PTLO 20010502 12 20 4905697 n 5 RA2 MWS 2PTLO 20010502 12 23 40030595 5 R 2 WWV 2PTLO 20010502 16 04 1547801 5 R 2 WWV 2PTLO 20010502 16 00 1295397 5 rx rx log 20010502 21 27 10099607 5 SCI_CC2_AKVD 20010502 20 04 3001631 5 SCI_LFM2_AXVD 20010502 20 04 1202132 5 SCI_LK1_AXTD 20010502 20 02 1248593 EN 5 SCI MF2 AXVD 20010502 20 05 2622961 Ferme 5 SCI_LNL__1PTD 20010502 16 24 349881836 5 SCI NL 2PTD 20010502 20 03 3411132 Hename Refresh SCI SF2 AXVD 20010502 20 06 1307246 Refresh fa status log 20010502 21 27 1977605 Dirlnfo Dilnfo C ASCII Binary Auto 150 Opening ASCII mode data connection for directory listing a Received 6648 bytes in 0 1 secs 640 00 Kbps transfer succeeded 226 Transfer complete x Close Cancel Logw nd Help Options About Exit Products are typically have names in upper case In the above example ASA ATS and GOM are those products Select click one or all of these and download them Afterwards you may want to delete those products already downloaded in selecting one or more and delete it Note that the system keeps track of any download delete action Please do not delete products unless you have already downloaded and saved them to a different location Three more files may be downloaded in order to analyse problems In order to obtain the full reception log d
19. S Configure Perform casn Parameter Value Number of days 2 DVB RX Interface ENABLED Yes SYSTEM s Delete files older than 2 days HELP 8p Internet The two parameters which have been set in the configure screen are shown again for reference Number of days the selected threshold for file persistence on hard disk Enabled if disc configuration is currently enabled or not NOTE there is no undo function if deletion is wrongly activated The Users are warned to use this command only after careful verification that none of the ageing files on disk must be kept or forwarded e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 24 of 35 6 1 10 DVB RX INTERFACE STATUS Click DVB RX Interface to obtain the status of the integrated receiver decoder dj ENVISAT Microsoft Internet Explorer I D xi File Edit View Favorites Tools Help Back gt search Favorites History IES E EJ 9 Links lt f ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 RXPC name rxpc002 simple at MEAN ENVISAT rxpc002 2001 08 09 10 45 57 rxpc002 2001 08 09 10 45 57 OUTTRAY RECEIVER LOGS AN FORWARDING DISK CLEANUP Configure Perform cleanup Data Lock Hot Locked Signal Lock Hot Locked Signal Level DVB RX Interface Viterbi Rate Viterbi Decoded Bit Error Rate LNB Offset
20. T Microsoft Internet Explorer EC lol xl File Edit View Favorites Tools Help EJ Bak gt A search Favortes History ES J 2 inks ee 4 ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Uy RXPC name rxpc002 simple at INIRAY ENVISAT LOG DP OUTIRAY rxpc002 2001 08 09 10 19 58 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS High speed Log Low speed Log reference time message 2001 LAN FORWARDING 20010806155109 08 06 expected time for completion 15 52 56 2001 20010806155109 l08 06 MER RR IPTACR20000620 104318 00000104X000 00000 00000 0000 N1 DVB RX Interface 1552 27 ready DISK CLEANUP FILE NAME SYSTEM summary 2001 20010806155255 08 06 MER RR 2PTACR20000620 104318 00000104X000 00000 00000 0000 N1 D SIZE 24928256 BELE 1232 39 ESTIMATED TIME 101 second s 2001 20010806155255 08 06 expected time for completion 15 54 54 2001 20010806155255 08 06 15 54 24 MER RR 2PTACR20000620 104318 00000104X000 00000 00000 0000 N1 Internet The first data line in the table says the following with reference to 20010806155109 the product will be ready The second line tells that with reference 20010328110029 at 2001 08 06 15 52 27 the product MER RR PTACR is ready to be downloaded The product name MER RR IPTACR is underlined and the User may immediately download the corresponding product i
21. XX XXX XXX XXX ssh authorized keys identity pub 0 KB 0 3 kB s ETA 00 00 00 100 e If everything went well all products can be transferred and afterwards removed gt bash 2 04 usr bin scp db N1 envisatQOXXX XXX XXX XXX gt bash 2 04 bin rm f db N1 e These commands can then be applied to dpld replace db with dp1d as well and can be put into a shell program which can be invoked by a cron regularly 63 DISK SPACE PROTECTION CLEANUP DDS system is based on the assumption that it is user responsibility to keep enough space in the RX PC disk to receive data The RX PC acts as temporary file repository system for the host where the products will be processed and used further It receives files via the satellite interface and stores them on a disk ready to be picked up by the user via the two available interfaces HTTP and FTP get Due to the nature of the service it is assumed that real time disseminated data should be used almost immediately by the user and therefore its persistence on the RX PC should be minimal In addition any saturation of the disk space would prevent newer products to be received Therefore in order to have always enough disk space to receive incoming products the RX PC has an automatic procedure to delete products when disk space exceeds a given treshold This procedure is not activated by default It is assumed that the importance of the products is such that users do want them definitely
22. aiba uqu ae ade Uu at gees ey distance 384 Computing the keys Testing the keys Key generation complete Enter file in which to save the key home envisat www ssh identity Enter passphrase Enter the same passphrase again Your identification has been saved in home envisat www ssh identity Your public key is 1024 37 118345455166912416680505406166337351103263533721962390021081946742037292478615360 673115947065814649993023501638806267968520847535284728562029011201046410721486195 334910581639608412213100611515511107678664731334494397214253604661390231798382587 785686570133067385125400681805256284670033444722139983363993229059 envisat rxpc0l Your public key has been saved in home envisat www ssh identity pub e Copy this identity key to the target host XXX XXX XXX XXX for target user for example envisat using scp this time you have still to provide the password bash 2 04 scp ssh identity pub envisatOXXX XXX XXX XXX ssh authorized keys Host key not found from the list of known hosts e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 30 of 35 Are you sure you want to continue connecting yes no yes Host XXX XXX XXX XX added to the list of known hosts envisat XXX XXX XXX XX s password identity pub 0 KB 0 3 kB s ETA 00 00 00 100 e Repeat this step to see whether the auto logon works gt bash 2 04 scp ssh identity pub envisatOX
23. downlink parameters fi 4 1 e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 3 of 35 TABLE OF CONTENTS e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 4 of 35 INTERNET CONNECTION PROBLEM RECEPTION PROBLEW e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 5 of 35 1 INTRODUCTION This document describes the procedures applicable for any DDS authorised User for the correct operation and maintenance of any DDS receiving station of the type Envisat Commissioning RX PC In particular this manual describes the user interface to the RX PC under normal conditions and assumes a correct installation and commissioning of the receiving station following 1 and 2 The manual provides also some normal maintenance verification actions and some guidelines to diagnose receiver malfunctions and identifies the actions to be taken to support the remote maintenance support The RX PC requires minimal User interaction to carry out its primary operational functions The RX PC acts as temporary file repository system for the host where the products will be processed and used further It receives files via the satellite interface and stores them on a disk ready to be picked up by the user via the two available interfaces HTTP and FTP get Optionally a process can be con
24. e forwarded and deleted locally afterwards After clicking Execute please do not interrupt this page Configure Perform forward Parameter Value FTP Host IP address 141 201 2 216 FTP User test DVB BX Interface FTP Remote Directory envisat FTP Mode normal SYSTEM summ Delete files afterwards HELP Execute DISK CLEANUP n Internet Upon clicking Execute all products will be forwarded to the FTP host with corresponding log on details Successfully forwarded products can be removed in checking the Delete files afterwards box NOTE After successful configuration and automatic forwarding files are always Immediately deleted and do no longer reside on the local harddisk C e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 22 of 35 6 1 8 DISK CLEANUP CONFIGURE Click Configure to set up the parameters for automatic disk cleanup Si ENVISAT Microsoft Internet Explorer E Jal xl File Edit View Favorites Tools Help Bak gt A search xgFavortes CHristory ES 3 BEL E QV Links a F ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 RXPC name rxpc002 simple at ENVISAT DISK CLEANUP CONFIGURATION OUTTRAY rxpc002 2001 08 09 10 40 50 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS With this form the DISK CLEANUP will be configured ARD O
25. eam aLAN and LAN RJ 45 connectors for local aLAN and external LAN Ethernet connections The aLAN must not be used for other purpose than maintenance C e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 12 of 35 6 OPERATIONS This chapter will provide information about the procedures to be followed to operate at Users s sites the RX PC The User shall be a person duly delegated by the User site and shall be responsible for any interaction with DDS Team or Helpdesk He will take care of compilation of a operation log book making use of window dumps CTRL PrtScr for any detected problem This information shall be used to generate a problem report where the window dumps have to be included For all the following actions the User should connect to the RX PC using a standard web browser pointing to RX PC Then he should login to the RX PC as user envisat password 4envisat0 Once the system shall be accepted for operations the password must be changed by the user and the new password shall be given for record to the DDS operation 6 1 HTTP E ENVISAT Microsoft Internet Explorer E a E ue nj xj File Edit View Favorites Tools Help Ea lt Back gt A search xgFavorites History ES amp Bg E 2 tinks lt Yi ENVISAT DATA DISSEMINATION SYSTEM Y Envisat code SALZ002 RXPC name rxpc002 simple at INTRAY EOHelp ESA Earth
26. ed by the User to automatically forward products via FTP to an external server those forwarded products are automatically deleted locally after successful forwarding Finally the receiver is provided with an utility to erase old files in order to keep enough disk space for incoming products Figure 2 Typical RX PC 1U chassis eC Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 10 of 35 5 INSTALLATION This manual assumes that a correct preparation installation and commissioning of the user station has already taken place following RD 1 RD 2 and RD 3 5 1 Installation Requirements The user site has to permanently provide for the correct installation and operations to the DDS operations responsible the following listed items e Maintain the antenna correctly pointed toward the selected satellite with feed oriented for the polarisation in use e Maintain the low loss coaxial cable with F connector from the outdoor e Operational TP Ethernet cable LAN connection 10 100 Mbit s TwistedPair Ethernet with access to the Internet e Operational access from the Internet to the RX PC via a public IP address RD 1 e Details about the any modification to the permanent IP connection to be assigned to the RX PC comprising 1 IP address 2 net mask and broadcast address 3 router IP address 4 DNS server IP address 5 2 Installation procedures The listed RD 2 contains
27. figured and activated under user s responsibility which forwards automatically the received files to a user s target computer using a standard FTP put Under normal operations the RX PC needs only minimal operator interaction All monitoring and control is done by remote by the DDS operator However if the local network configuration is changed then some local support may be needed It will be responsibility of the User to carry out all listed tasks periodically and to keep up duly note of the results 2 REFERENCES 2 1 Applicable Documents None 2 2 Reference Documents RD 1 APP ADU 0102 029 Iss1 2 Envisat DDS RX Site Requirements RD 2 APP ADU 0103 043 Iss1 2 Envisat DDS RX Site Installation Procedures RD 3 APP ADU 0103 042 Iss1 1 Envisat DDS RX Sites Install Verification Procedures C e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 6 of 35 3 SW CONFIGURATION APPLICABILITY This manual is applicable to the DDS V2 0 SW release of the Receive DataCast Application RDCA which relies on DataCast version 3 2 2 protocol version 2 RRMP version 3 Built Jul 18 2001 07 09 56 e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 7 of 35 4 SYSTEM OVERVIEW The satellite based Data Dissemination System is currently mainly dedicated to provide the dissemination of Envisat data products during the Envisat commi
28. files after successfull forward Setup 4p Internet amp http 141 201 123 51 ftpconf cgi Please provide correct Information for FTP Host IP address do not use a hostname or fully qualified host name here Username must be non empty and valid Password must be non empty and correct FTP Directory can be empty or must be an existing subdirectory on the FTP Host FTP Mode normal or passive mode sometimes required with firewalls Always Forward from now on check to enable Remove files after successful forward enable to remove files locally NOTE that the forwarding can be activated only for new arrivals but not during an on going transmission for that product e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 21 of 35 6 1 7 LAN FORWARDING PERFORM MANUAL FORWARD Click Perform forward to forward immediately all products locally stored Z ENVISAT Microsoft Internet Explorer E ni x File Edit View Favorites Tools Help Bak gt A search Favorites History ES gt E E 2 Links Ko 4 ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 RXPC name rxpc002 simple at ENVISAT LAN FORWARDING OUTTRAY rxpc002 2001 08 09 10 37 08 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS Once configured this allows to run FTP Forwarding once LAN FORWARDING All stored products will b
29. n clicking on this link The third line indicates a new product arriving with reference 20010806155255 and some more details NOTE that three consecutive rows on the table logically belong together in the above example this are table data lines 3 4 5 e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 20 of 35 6 1 6 LAN FORWARDING CONFIGURE Click Configure to set up the parameters necessary to perform LAN forwarding d ENVISAT Microsoft Internet Explorer I g mj xl File Edit View Favorites Tools Help Bak gt A search xgFavorites History ES tJ inks Ko 4 ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Z RXPC name rxpc002 simple at ENVISAT LAN FORWARDING CONFIGURATION OUTTRAY rxpc002 2001 08 09 10 29 27 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS With this form the FTP Forwarding is configured Once the Setup button has been clicked the automatic forwarding is configured Upon checking Enable the automatic forwarding is enabled Uncheck Enable to disable LAN Forwarding LAN FORWARDING Configure Perform forward Parameter Value DISK CLEANUP FTP Host IP address 1412012216 DVB RX Interface Username fest Password p SYSTEM summary FTP Directory Jenvisat HELP FTP Mode normal gt Always Forward from now on M Remove
30. nce the Setup button has been clicked the cleanup is configured ET NG Upon checking Enable the automatic cleanup 1s enabled DISK CLEANUP Uncheck Enable to disable Cleanup Configure Perform cleanup Parameter Value Number of days e DVB RX Interface M Enable Automatic file removal SYSTEM summary Setup HELP n Internet The User shall input the number of days after which products may be deleted This shall be selected by the user in order to keep enough space on the hard disk for future incoming products NOTE Once programmed the first clean up will be performed after the given time is elapsed C e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 23 of 35 6 1 9 DISK CLEANUP PERFORM MANUAL CLEANUP Click Perform cleanup to remove immediately all products older than Number of days 4 ENVISAT Microsoft Internet Explorer xl File Edit View Favorites Tools Help Bak gt A search Favorites History ES ag 2 Links ee 4 ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Uy RXPC name rxpc002 simple at pee ENVISAT LAN FORWARDING OUTTRAY RECEIVER LOGS rxpc002 2001 08 09 10 42 03 This will delete all data files stored that are older than 2 days LAN FORWARDING All old stored products will be deleted After clicking Delete please do not interrupt this e DISK CLEANUP king TE
31. not supported by the Broadlogic Linux driver The system needs to have a minimum speed provided by the system components therefore its configuration is currently Pentium III 800 MHz FSB100 256 MB of RAM Two SCSI storage controller Symbios Logic Inc formerly NCR 53c1010 Ultra3 SCSI Adapter One 18 type 1 or 36 GB type 2 IBM hard disk model DDYS T18 36350N Direct Access ANSI SCSI revision 03 e Two Ethernet controller Intel Corporation 82557 Ethernet Pro 100 10 100 Mbps twisted pair autosensing e One Network controller BROADLOGIC 2030 16 The RX PC CU integrates the Broadlogic 2030 16 Satellite Express DVB receiver card which performs the tuning decoding demuxing decapsulation of DVB data streams into IP packets The RX PC CU runs the DataCast Linux receiver with DataCast version 3 2 2 protocol version 2 RRMP version 3 Built Jul 18 2001 07 09 56 which allows full reliable multicasting of files It implements two profiles one specific for ENVISAT X1 Each individual RX PX CU has a unique encryption key which is used to obtain the product encryption keys This key and the delivery of the product key to a specific UDP port makes the receiver unique in the network and ensure the delivery to and only to the selected destinations Upon completion of the product this product stays on the local disk and can be accessed by the user through a Web interface or via FTP In addition LAN forwarding can be configured and activat
32. ownload the file rx rx log To obtain the full listing of all products received download files log To obtain the full status of all system notifications download status log e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 6 2 2 ENVI GSEG EOAD MA 01 0005 page 29 of 35 These procedures may be implemented in an automatic way by a script which would run under user responsibility on the remote host SECURE COPY SCP PUT In order to automatically forward products from RX PC to another host for example equipped with larger hard disks or CD writer and in addition to the system configurable via the HTML page another procedure is also made available to the user This process is envisaged for all those applications where the data transfer requires an high security level It can be configured following the steps described below and it is based on a Secure Copy SCP file transfer As for the FTP get the correct operation of the product forwarding itself shall be responsibility of the user The following steps are necessary to avoid manually typing the password for Secure Copy scp e Logonto RXPC as user envisat e At the login prompt issue the command bash 2 04 usr bin ssh keygen which asks a number of question to be answered with RETURN Initializing random number generator Generating pt ede Ro Ee UR UR Re o ee ux ce Ew yi ee i Re eR SUR e eS distance 838 Generating Qe h
33. r this part of operations e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 32 of 35 9 TROUBLESHOOTING In any abnormal condition the user shall not perform any hard reboot of the system OFF ON unless explicitly requested by the DDS HelpDesk maintenance team In case the user should believe that an expected product has not been delivered he may follow the troubleshooting procedures in order to verify the RX station status and to collect data for maintenance actions 9 1 Station ON As a first thing the user should verify that the RX PC is switched ON and reachable via the local LAN connection Please check with a Web browser and FTP client that RX PC is accessible At the rear side of RX PC you see LEDs on the Broadlogic DVB receiver and two LAN cards Both LEDs of the Broadlogic DVB receiver should always be GREEN This indicates that both the card is initialised and the satellite reception is in good shape If for any reason one or both LEDs are blinking the satellite reception is disturbed Please proceed to the DVB card operation to learn how to deal with this The right hand LAN connector should have the twisted pair 10 100 Mbit Category 5 cable properly connected and on this connector the LED should be GREEN Typically the other LED will blink ORANGE whenever traffic is on the LAN in a normal LAN this is nearly always the case If not activity of the ORANGE
34. roducts that have been received are viewed Those which are still locally stored are linked to its local source and can immediately be downloaded Clicking INTRAY the user shall obtain the following screen e S a Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 15 of 35 Z ENVISAT Microsoft Internet Explorer a ni xi File Edit View Favorites Tools Help Bak gt A Asearch Favorites History ES 3 E 9 Links lt Z ENVISAT DATA DISSEMINATION SYSTEM Envisat code SALZ002 Uy RXPC name rxpc002 simple at aa ENVISAT INTRAY OUTIRAY rxpc002 2001 08 09 09 15 54 DVB CHECK DISK OK LANFWD OFF CLEANUP ON RECEIVER LOGS LAN FORWARDING reference size product message DP i ENN 2001080613050 196169728 ASA IMG 1PXPDE19960508 211733 00000000A131 00333 65463 0021 Perform forward DP 20010806130834 DP DVB RX Interface 20010806131238 DP SYSTEM summary 20010806131324 DP HELP 20010806131420 DP 20010806131515 DP 20010806131705 DP nninR0R131729 499712 RA2 FGD 2PTLOP20000620 000000 00000100X000 00000 00000 0000 N gt DU eee n Internet Z 51965952 ASA WVI_1PXPDE19970107 061135 000015004018 00097 08614 0003 N DISK CLEANUP 62185472 ASA APM 1PTPDE19950820 103150 000001204004 00234 01737 0023 5 5505024 RA2 MW IPTI P20000620 120000 000000004001 00100 15500 3333 N 7413760 RA2 MW 1PT
35. ssioning phase The DDS is a major evolution of the EEM A ERS TPM data dissemination system and will share resources with this system The sharing will be such that the DDS operational requirements and associated quality of service is always ensured For the commissioning phase the Envisat DDS is based on two Ku band uplink stations located at Kiruna and ESRIN and a park of some tens RX operational stations The transmission is based on a fully reliable transmission protocol based on an RRMP IP multicast transmission over a DVB MPEG 2 SCPC satellite link with a satellite link between 2 and 5 Mbps data rate The system is designed in order to allow expansion of both the number of Transmitting and Receiving stations Also the design of the current system is based on a potential expansion of the satellite throughput link to a maximum of 8 Mbps without major modifications at any TX site and none at the receive site 4 1 Current Satellite Link Parameters DDS is currently transmitting from Eutelsat W1 Satellite Transponder F3 horizontal polarisation carrier freq 12622 5553 MHz Symb Rate 3 333 Msps Fec 7 e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 8 of 35 Receive system description The receive system located at user end for the commissioning phase is divided in two basic units An external unit called also RX RF and an internal unit called RX PC 42 RX RF The receive
36. ta products from the receiver to a remote host are possible These are described in the following 6 2 1 FTP GET MANAGE PRODUCTS FROM REMOTE HOST Connect with your preferred FTP programme to RX PC In this example WS FTP LE is used AWS FIP LE 141 201 123 51 Local System Remote Site MkDir 20010328 10 41 28672 C3 dpid 20010323 09 03 4096 Hename Hename Refresh Refresh Dirlnfo Dirlnfo C ASCII Binary Auto 150 Opening ASCII mode data connection for directory listing P Received 130 bytes in 0 1 secs 10 00 Kbps transfer succeeded 228 Transfer complete Close Cancel Logwnd Help Options About Exit On your target machine from where you connect to RX PC you may have a subdirectory envisat Please make sure that you have enough free disk space on your machine You may also have a CD_ Writer in that machine so that you can make CD copies of the products After connecting to RX PC again you see the subdirectories holding the respective services Currently one for the low rate DB channel and one for high rate DP channel e sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 28 of 35 Note that you cannot access any other elements in the file system than products In order to pick a product transferred on the DB channel go to the db subdirectory wS FTP LE 141 201 123 51 E El x Local System
37. the installation procedure for the person of the Envisat DDS team authorised to install and correctly pre configure the DDS receiving station of the type Commissioning Normally it will be responsibility of that person to configure all listed items Therefore only tasks to be performed regularly by the User for the correct operations are drafted in this document However the basic information on the rear external interface connections is following provided Power connector ON OFF SAT connector Keyboard VGA aLAN LAN e Sa Envisat DDS Receiver User Manual issue 1 revision 1 26 11 2001 ENVI GSEG EOAD MA 01 0005 page 11 of 35 Power connector To be connected to a 220 V a c supply To be noted that the system is configured to work with a continuity power UPS system Therefore any loss of power is considered an exceptional event requiring manual intervention In particular the receiver set up foresee a manual reboot after power restore On Off switch This switch may not be used without authorisation by the DDS operation responsible Sat Connector F type female connector to be used to connect the receiver via the 75 Ohms coax cable to the LNB unit Keyboard 6 pins mini DIN connector for mouse and keyboard Keyboard port must not be used in normal circumstances if not requested by DDS operations team VGA VGA D 15P connector for screen monitor VGA port must not be used in normal circumstances if not requested by DDS operations t
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