W-CODE
Contents
1. 522 W CODE SAT VV VV Y W CODE SAT W CODE SAT W CODE SAT Data storage handler FAX Data Voice tiff txt wav Figure 16 Easy SAT Control As part of the INMARSAT software the Easy SAT Control software is include It contains a small con trol application that allows multi channel monitor ing of INMARSAT B M mM W CODE Specification List of Abbreviations Remarks CC CGedehek 0 Parameters depend on the selected code The full parameter ranges can only be used working with the source code Specifications may be changed without prior notice S o HF Protocols HF Protocols will be expanded in the future UARQE 0000000000000 E CIS 11 TT p CIS 50 50 CLOVER 2000 ARQ CLOVER II ARQ CODAN SELCAL CODAN9001 COQUELET 13 COQUELET 8 COQUELET 80 CV 786 CW MORSE DCS SELCAL DGPS DUP ARQ DUP ARQ 2 DUP FEC 2 EFR NACHRICHTENTECHNIK HF Protocols will be expanded in the future Es a FELDHELL TT FM HELE Jo o Jo GMDSS DSC HE Od Y o o o LGWSK 0 Y oco E HEACARS HEDD o o ICAO SELCAL ANNEX 10 o MD 674 S S oc MFSK 16 S A e MFSK 20 0 S EMESIC oo Y o o MIL 188 110 16TONE 110A B App A Y MIL 188 110 39TONE 110A B App B oS o MIL 188 110A Serial Tones 75 4800 bps Yo MIL 188 110B App C STANAG 4532. Phone 41 44 872 70 60 FAX 41 44 872 70 66 Email info wavecom ch Internet http www wavecom ch
3. W CODE Standalone Software Solution for Signal Classification De coding Analysis amp Processing l sv2 Z WAVECOM W CODE W CODE Classifier Code Check Card 1 ii HA Cw gt jm File HF Modes VHF UHF Modes Satellite Demodulator Options Favorites Setup View Window Help Classifier Code Check Auto Gathering Data JINV Auto Mode Fast Scan 17 36 59 Dares s S aall ZI gt E excojes es zat m 4 elaz mI dTe lal ous ome gt mmm 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 Hz I 1 1 l I I l I I I I l 1 1 1000 1250 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 Hz Bandwidth 3 o B n 0 8 5 KA 4 4 ch E N K G 1 in No C in 4 00 v vss 31 0 wo de de ae de NNN p Classified signal codecheck data H Signal 3 Classifier Code check started checking Signal No Code check is working Predicted Mode s ARQ E ARQ E3 ARQ N ARQ M2 242 ARQ M2 342 SI ARQ ESE 72 BITS FEC A 128 BITS CIS 14 ASCII 9 BITS A CII 4 n Demodulator SRC Bandwidth 4800 Hz Center 1720 Hz Translation 0 Hz Input NewInput 1 Figure 1 W CODE with Classifier Code Check and multiple signals W CODE Overview The W CODE is the first software only decoder in the well known WAVECOM line of decoders The W CODE software is designed to work with your existing equ
4. o PDZVEI SelalAnalog o o SKYPER POCSAG o o _VDEW Selcal Analog _2VEI 1 Selcal Analog _2VEI 2 Selcal Analog o ZVEL3 SekalAmlog o ZVELVDEW SelalDigital o SAT Protocols SAT Protocols will be expanded in the future SAT B Data INMARSAT forward SAT B FAX INMARSAT forward SAT B HSD INMARSAT forward High Speed Data FAX and Modem Protocols FAX and Modem Protocols FAX G3 T4 T6 JPEG JBIG T 30 protocol with ECMM V 22 ITU T V 22bi s ITU T V 32bis ITU T V 34 ITU T V 42A HDLC framing MNP4 MNP5 Protocol V 42bis HDLC framing MNP4 MNP5 Protocol V 8 ITU T V 90 ITU T V 92 ITU T SAT B TELEX MM INMARSAT forward NACHRICHTENTECHNIK List of Alphabet List of Alphabets Demodulator Demodulators Biterror rate within 3 dB of theory white Gaussian noise non fading channel AM for METEOSAT and NOAA GEOASAT FAX transmissions BPSK 10 12000 symbols s BR6028 Modem 7 FDM channels S 85 Hz Pilot Tone 561 Hz CTCSS CW Morse 10 500 WPM Center freq 0 5 kHz 3 5 kHz BW 100 Hz 1 2 kHz DPSK DBPSK DQPSK D8PSK D16PSK 10 12000 symbols s DTMF DXPSK dual carrier adaptive modulation 2DPSK D16PSK 100 Baud FFSK 10 12000 Baud Shift 50 Hz 16 kHz FSK 10 2400 Baud Shift 50 Hz 3 5 kHz Center freq 0 5 kHz 3 5 kHz GFSK 10 12000 Baud Shift 50 Hz 16 kHz ITU T V 34 HDX V 17 V 19 V 29 V 27ter V 21 ch2 V 8 for Modems and FAX G3 Ma
5. Classification The results of the classification are shown as a list in a second pane The following parameters are provided for each classified signal gt Modulation type Center frequency of the signal Number of carriers in the case of multi carrier FSK Baud rate in the case of FSK or PSK signal Frequency shift in the case of FSK signal gt Bandwidth V NW NON Additional information Additional graphical FSK MFSK and PSK informa tion on symbol timing and constellation baud rate and frequency vs time is displayed in a separate window when a classified signal is selected from the list m 36 WAVECOM W CODE W CODE Classer Ced 1 i L E ei Die HF ffodes VHF UHF Modes Satelite Modems Demodulator Options Favertes Setup Yew Widow Help al Mode OM R Clas de 9 Chssication Prah Auto 14 5021 Dau ole TIRI el lt C ed Ey Saa e t m H 2 SIS ga Symbols tere dapen red rea enum geen mageery values 2 Figure 12 Classifier data analysis Classified signals For a list of classified signals please see the sec tion Specification W CODE SAT INMARSAT Option The W CODE SAT together with the W CONF hardware is the first choice to build a cost efficient satellite monitoring system for INMARSAT The user interface of the WAVECOM satellite mod es is fully integrated as a software module in the existing hardware and professional software
6. 3250 3500 3750 4000 Hz Figure 4 HF DI ARINC 635decoding o 250 soo 750 1000 1250 1500 1750 2000 Demodulator IQ PB Bandwidth 3000 Hz Center 1440 Hz Translation 0 Hz Input NewInput 2 Restart Analysis The determination of signal characteristics is as sisted by a large number of analysis and mea surement functions operating over a wide range of signal parameters All of the integrated analysis tools contain many different methods and viewing options The GUI assists the operator in analyzing the important sig nal parameters Exact measurements are easily made using adjustable cursors with associated numerical displays Dynamic zoom functions allow magnification of details in any selected window The scroll buffering feature makes it possible to move back and forward in signal history m BEES Pat i BS SES Li d AMA P A ET W PARA P Figure 5 Spectrum FFT Sonagram Jt wantcow w cooe W COCE teken Cort 1 o TOTO Seen perso XE ji olsa tivi e 1 te ences an 80 TE e nici ammm sd E m Figure 6 FSK Analysis Demodulation and Decoding If a decoder for a protocol is selected then the demodulator can be tuned by the following ways gt Automatically for FSK Manually Ji wartcow w L W CODE ES Cd E oo n f e Bede MOIN Aon entm Modern peresino Optom Frm ptp View Madre Dy Ou istan aea Re
7. 8 decoders computer USB License Dongle Virtual Audio Cable VAC support WAV files playback and decoding loop mode XML Remote Control API for C and C XML over TCP IP Hardware System Hardware System Software only solution Sound card input maximum sam 192 kHz pling rate Tested with English version W CODE CL HF Classifier Option W CODE CL Classifier Option each option requires a separate license Classification Bandwidth 4 kHz or 8 kHz Classification Sample Time 1 6 or 3 2 sec Classified signals CW FSK 2 Modulation index 0 5 20 shift 25 2000 Hz speed 25 2500 Baud F7B shift 25 2000 Hz speed 25 300 Baud MFSK Max 34 carriers 25 300 Baud PSK2 4 8 16 A amp B speed 25 2400 Baud S N 16 db using a non cooperative equalizer OQPSK speed 25 2400 Baud OFDM shift gt 25Hz max 500 channels subcarrier spacing symbol rate range 1 1 2 5 Accuracy FSK speed 0 3 FSK center frequency 2 of speed PSK speed 0 2 PSK center frequency 0 15 of speed Sensitivity of classification FSK 2 m 0 8 100 2400 Baud S N 12 dB FSK 2 m 0 8 50 100 Baud S N 15 dB PSK2 4 100 2400 Baud S N 14 dB PSK8 100 2400 Baud S N 16 dB Operating Display of classified signals in FFT Continuous mode for HF classifier CCC Integrated classifier code check W CODE SAT INMARSAT Option SAT INMARSAT Option each option requires a separate license SAT A B C M mM details see code table W CODE SAT requires an exte
8. 9 o MIL 188 110B 3200 12800 bps o MIL 188 141A ALE Yo MIL 188 141B BWO BW1 BW4 data o o MIL 188 141B BW2 amp BW3 id gnie MIL M 55529 NB WB S Y o LOUMA 0 Y o PACTORdI alCRCS o Y PACTOR EFEC allCRCS o Y _PACTOR III all CRC s o Y PICCOLO MKi2 o Y o PICCOLO MKG o Y o LPRESSEAX o o PSO H H PSK 125F T E PSK 220E o Y o _PSK 31 BPSK QPSK Y PSK 31 FEC LE PSK 63F a RENEE EBH PSK AM p ROBUST PACKET RADIO MEE EE RUM FEC SI ARQ e SI AUTO Ca E SI FEC SITOR ARQ SITOR AUTO SITOR FEC SP 14 Lp SPREAD 11 COO HF Protocols will be expanded in the future CL ec v v v ss ante T TTT TSSTV Robot 8s 125 ss T sense as T TTT TTT TSSTV Wraase SC 1245 4858965 T EE stanac 4415 75 bps AO ROBUST O O O OoOo ooo USTANAGAABIRSK OOOO stanac 4529 75 800 ps 0 Sooo o stanac a539 3200 128008ps mnp ang S es OS O O wem T VHF UHF Protocols VHF UHF Protocols will be expanded in the future CC ACARS SS AS O ASCII v SSTV Wraase SC 2 20s 60s 120s amp 180s DGPS 2 EURO Selcal Analog FLEX FMS BOS Selcal Digital GMDSS DSC VHF UHF GOLAY MOBITEX 1200 with partial OVLS extension MOBITEX 8000 MODAT Selcal Analog MPT 1327 NATEL Selcal Analog NMT 450 NWR SAME PACKET 1200 PACKET 9600 NACHRICHTENTECHNIK VHF UHF Protocols will be expanded in the future ae _PCCIR Selcal Analog o
9. Additional functions are gt Remote Control to enable the customer to build his own customized system gt INMARSAT B M mM L Band only forward channel monitoring does not require a large C Band anten na INMARSAT B M mM These modes offer video data and fax service at different speeds The software monitors the control channel and upon initiation of a new session with a mobile ter minal automatically switches to the assigned traf fic channel for monitoring 90 80 70 eo 4 X 178EPOR SAN AOR W TEL 872 TLX 582 TEL 874 TLX 564 TEL 871 TLX 581 TEL 873 TLX 583 15 5W AOR E 64E IOR Figure 13 Satellite locations To limit the volume of monitored traffic a watch list may be created containing target MES IDs Monitored fax and data sessions are stored in files A fax viewer is included in the software INMARSAT B and M Voice are supported mM on request INMARSAT B C TFC SAT B C TFC is used to monitor the return signal of SAT B This signal can be the uplink L Band sig nal or the downlink C Band signal INMARSAT B HSD HSD High Speed Data Service using Inmarsat B enables high speed data communications between an INMARSAT terminal and a land side ISDN terminal or between two Inmarsat terminals via 64 56 kbps or 128 112 kbps circuit INMARSAT C TDM BE WAVECOM W CODE W CODE Text Card 1 tor x Die Mf hMode WHF YHF Modes Satellite Modems Demedulater Options Farortes je
10. ON 12 5998E OSITION 55 7030N OSITION ACCURACY low gt 10 m IM Not in use COMMUNICATION STATE SOTDMA NO TEIS TRANSMISSION 1553 FRAME SPECIFIER 22 CEANNEL MANAGEMENT SI 744925532 COUNTRY MID not allocated S CHANNELS CHANNEL A 1885 CHANNEL B 811 TXRX MODE OWER LEVEL High DRESSED STATIONS STATION ID1 7070934581 STATION ID2 ESSAGE INDICATOR Addressed TRADITIONAL ZONE SIZE 7 nm ANDWIDTH CHANNEL A As specified by channel no FRAME SPECIFIER 1 POSITION REPORT SI 219319000 COUNTRY Denmark JAVIGATIONAL STATUS Not defined OT Not available SOG Not available COG Not available TRUE HDG Not available TIME STAMP Posn sys inoperative EGIONAL APPLICATION 0 OSITION Long not available OSITION Lat not available OSITION ACCURACY low gt 10 m IM Not in use COMMUNICATION STATE SOTDMA EIVED STATIONS 538 4 Not used 483470304 CHANNEL B 12 5 kHz SYNC STATE UTC direct SLOT TIME OUT SYNC STATE UTC indirect SLOT TIME OUT SLOT REC Demodulator GFSK Shift 6000 Hz Figure 2 Decoding AIS from a 12 kHz IF file l 0 I E l i i p Restart hm Translation 12000 Hz Input file Features gt Y Y Y Y Y 70 WAVECOM W CO CODE TCP IP data input LAN for IQ or PCM coded data Data conversion to the WAVECOM format is done by a separate external application Source code available on request Decoding from PC soundcard with sampling ra
11. STANAG 4529 ajaja 1 i Ila E BRISE 2 SIN Le gt e 2399 9Bd 2399 9Hz MIL 188 110A MIL 188 141B STANAG 4285 STANAG 4529 Demodulator SRC Bandwidth 4800 Hz Center 3500 Hz Figure 3 Classified STANAG 4285 signal Translation 0 Hz Functions General The easy to use graphical user interface GUI with well structured pull down menus allows an operator to become familiar with the W CODE ina short time A high degree of operator proficiency can quickly be achieved The decoder can be used in a number of configura tions gt Local use as a PC application gt Remote use via a LAN with standard W CODE appli cation instances in a client server mode Remote control from other applications using third party software using TCP IP and XML These features allow the system to be adapted to the client s requirements and applications The implementation of complex systems for moni toring on a large scale is only limited by the num ber of decoders and the performance of the hard ware and software The configuration of the system components can be completely adapted to the requirements of the customer A wide range of system default settings can be configured e g input signal level measuring in terval centre frequency and demodulator type A W CODE decoder may be controlled from every where in the network and its output may be sent to one or more applications on the networ
12. ipment no proprietary hardware required It allows seamless integration with SDR Software Defined Radio receivers with IQ data or digital audio outputs TCP IP streams and sound cards One client license is provided with each software package multiple licenses on request W CODE provides all functions required to analyze decode and process radio data communications throughout the spectrum HF VHF UHF and SHF The W CODE provides gt An signal overview using real time spectrum and waterfall display ZE WAVECOM W CODE W CODE Text Card 1 File HF Modes WVHF UHF Modes Satellite Modems Demodulator Options Favorites Setup View Window Help Demodulation decoding to content level of known signals Decoded output can be saved to files or picked up from the remote control interface Manual signal measurement Automatic classification and CodeCheck of unknown signals A versatile XML Remote Control Interface with the same command set used by the W51PC and the W61PC The COMINT Solution for Government agencies Homeland and government security agencies defense contractors Telecommunications authorities Defense signal corps Ex Baudrate 9600 00 Sync Mode All Frames 11 59 59 Oise 629 ala vi j is Ej misiaigieielmi i izi si i el eee wmm 3600Hz M M ae00H L W CODE Text Card1 BASE STATION MMSI Information not available OSITI
13. k In order to process the data output control the decoder and the code parameters an integrated remote control interface allows easy control of the W CODE from a customer application GND STATION ID 14 KRASNOYARSK RUSSIA UTC Sync at 1 2 Slot Acknowledgement Codes Frame Slot Frame Slot Frame Slot 11 ID 00 2 11 ID 00 0 12 ID 00 2 12 ID 00 0 2 01 ID 00 1 01 ID 00 1 2 02 ID 00 l 02 ID 00 1 2 03 ID 00 1 03 ID 00 2 04 ID 00 cr 04 ID 81 ACK 1 0 a 05 ID 00 1 05 1D 00 0 2 06 ID 00 1 06 ID 00 0 2 07 ID 00 07 ID 00 0 2 08 ID 00 l 08 ID 00 0 2 09 ID 00 1 09 ID 00 0 Z 10 ID 00 1 10 ID 00 0 owest Priority accepted 0 n FP E WAVECOM W CODE W CODE Text Card1 I TO TT an ERE R EL tme cH AERE E o o IP E mts File HF Modes VHF UHF Modes Satellite Modems Demodulator Options Favorites Setup View Window Help HF ACARS Data Rate 300 00 bps Slot Length 1 80 s TNV Sync aa Msg AllData 14 58 34 ZN K Cu f Dla le E Dag amp amp da amp QL lvl e EE ZH S el i Lr 2 A fa 400 HS 8 B qo0H2 RTT 3 W CODE Text Card 1 babae Slot Assignment Codes 11 Random Access 12 Random Access 01 Random Access 02 Random Access 03 Random Access 04 Random Access 05 Random Access 06 Random Access 07 Random Access 08 Random Access 09 Random Access 10 Random Access 1 1 1 1 1 1 1 1 2250 2500 2750 3000
14. otherwise requires considerable skills and gt Software source code and a complete development environment gt Training W CODE lt W CODE ag W CODE lt XML W CODE GUI Figure 10 Decoding system with external control application Software generated time stamps may be automati cally added to each line of decoded data to ensure precise backtracking of any signal experience The combination of a classifier and a decoder thus satisfies the requirement for an au tomatic system that is able to rapidly and reliably determine the characteristics of radio data trans missions within the signal spectrum being moni tored The classification algorithm determines the accu rate center frequency speed symbol rate shift bandwidth and modulation The detection and classification results are dis played in a list together with all parameters and are fully integrated into the WAVECOM user in terface Classifier Code Check CCC An FSK PSK or MFSK code check of the classified signal is started to further determine the protocol of the signal After the code check has completed the classifier and code check results are used to automatically parameterize the code and start de coding Spectrum display In this pane the monitored frequency spectrum is displayed After classification has completed the classified signals are indicated in the spectrum dis play
15. rk Space FSK 10 300 Baud Shift 50 Hz 3 5 kHz Center freq 0 5 kHz 3 5 kHz MFSK Tone length 4 1000 ms max 64 Tones Shift 50 Hz 3 5 kHz OQPSK 10 12000 symbols s QPSK 10 12000 symbols s Software AM FM Demodulator for IF Inputs Analysis Functions Analysis Functions Autocorrelation up to 200 000 bits Automatic analysis amp decoding software for all data and FAX G3 modulations Automatic CRC recognition of all PACTOR II and PACTRO II FEC systems Bit correlation analysis Raw FSK analysis Graphical display of demodulated data on a raster time line For visual recognition of cha racter and block lengths Bit length analysis Graphical display of demodulated data with automatic calculation of bit length with bit pattern display General Software Characteristics General Software Characteristics Message type for most MIL STD and STANAG codes sync async data bits parity bits stop bits MSB LSB ITA2 ITA5 ASCII HEX STANAG5066 Pass band filters in most codes Pass band tuning in FFT display in most codes SERIAL LINK serial data output over COM1 16 with Sound card input 16bit 48 kHz Stereo STANAG5066 parser in MIL STD and STANAG codes TCP IP direct data interface for digital receivers SDR ask for the WAVECOM TCP IP data exchange protocol TCP IP Remote Control with WAVECOM GUI full functionality over LAN Internet encrypted and speed optimized Unlimited scroll back buffers for text and graphic modes Up to
16. rnal receiver and interface for the IF Single channel INMARSAT C B M mM Monitoring System with FAX Voice Data File Recording FAX Viewer for B M mM B Voice Playback External receiver and interface required CLOVER2000 Option CLOVER2000 Option each option requires a separate license System Half duplex ARQ Center frequency 3000 to 3000 Hz AFC 50 Hz Speed 62 5 Baud Modulation PSK2A PSK4A PSK8A PSK16A ASK2PSK8 ASK4PSK16 2DPSK2A 8 tones Alphabet ITA 5 NACHRICHTENTECHNIK CLOVER2 Option CLOVER2 Option each option requires a separate license AFC PACTOR3 Option PACTOR3 Option each option requires a separate license AFC CODAN9001 Option CODAN9001 Option each option requires a separate license Ordering Information Ordering Information English User Manual Online Help English WAVECOM ELEKTRONIK AG 2009 All rights reserved Reproduction in entirety or in part in any form is prohibited without the written consent of WAVECOM The publication of information in this document does not imply freedom from patent or other protective rights of WAVECOM ELEKTRONIK AG or others All brand names in this document are trademarks or registered trademarks of their owners Specifications are subject to change without further notice For more information contact your local dealer or WAVECOM ELEKTRONIK AG WAVECOM ELEKTRONIK AG Hammerstrasse 8 CH 8180 Buelach
17. te 2n Lae Hot m 149 5 D ar al esl TIS eji E Sem 21 Maho gt 3 nix Figure 7 MFSK Analysis JE wen N W COCE E fete Codi i EL Um eam Negen Mam trien penaa gren grote jp Yow Boden tap Syretel Rete Mwah Diu Ja v el lt 6 eigimcje ela ej nix oj Dom L Figure 9 PSK Phaseplane Analysis gt Using the results from the classifier Services For authorized government agencies WAVECOM is able to provide gt Additional customer specific modes Applications Typical fields of applications for the WAVECOM de coders include gt Manual or automated monitoring of radio data communications in the HF VHF UHF SHF satellite bands gt Signal intelligence gt Signal analysis and classification For government agencies and telecommunications authorities the applications range from stationary monitoring of one transmission with a single sys tem to fully automated broadband monitoring em ploying many systems Decoded data can be imported from third party applications running on the same or another com puter in the network Classification Option The ability to rapidly identify unknown signals has become an essential requirement in signal analy Figure 11 Spectrum Classifier and Code Check Windows The automation of the signal classification process relieves the operator from manual evaluation which
18. tes up to 192 kHz Internal sampling rate converter Direct decoding from audio files Virtual Audio Cable VAC support Impressive list of currently implemented modes see specifications including v INMARSAT v Robust Packet Radio v CLOVER2 v CLOVER2000 v PACTOR3 v CODAN9001 Y Y DE W CODE Classifier Code Check Card1 m File HF Modes VHF UHF Modes Satellite Modems Demodulator Options Powerful 48 and 96 kHz wideband FFT Adaptive Equalizer for high speed PSK protocols Tested with a number of Software Defined Radios e g WiNRADiO Perseus SDR14 SDRIQ AOR AR ALPHA R amp S receivers using AllAudio and VAC IZT W CONF optional external input device with two channels AF IF 0 x 30 MHz and 70 MHz 52 5 87 5 MHz XML Remote Control Interface with the same com mand set as the W51PC and W61PC Optional software classifier plug in with 4 and 8 kHz bandwidth and FSK MFSK PKS and OFDM support Pass band filters to mitigate poor propagation con ditions or process wideband receiver input Worldwide support Amm Favorites Setup View Window Help Classifier Code Check Auto Sl STANAG 4285 NOR Auto Mode Fast Scan 12 07 33 E Signal 1 E Predicted Mode s Detected Mode STANAG 4285 Classifier finished Code check started checking Signal No 1 Code check is working Predicted Mode s MIL 188 110A MIL 188 141B STANAG 4285
19. tup yew Viindow Help TAT T Tarde 1200 00 Onplwy ASCII Mie 10 Olaq a e alg tiv ell mi RI999 sien SL 10 e 6 D os listy 13 1 163864 16564675 Figure 14 INMARSAT C TDM traffic INMARSAT C is a store and forward low speed message transmission system Currently it is one of the most reliable and most used systems for to day s communication This is traffic going to the MES Data output is in ASCII HEX or Baudot INMARSAT C TDM EGC The INMARSAT C maritime mobile satellite system has an inherent capability known as Enhanced Group Call EGC which allows broadcast messag es to be made to selected groups of ship stations located anywhere within a satellite s coverage Four geostationary satellites provide worldwide coverage for these types of broadcasts Two types of EGC services are available Safety NET and Fleet NET INMARSAT C TDMA INMARSAT C return channel traffic to the LES INMARSAT AERO The SAT AERO system carries different services between aeronautical Ground Earth Stations GES and Aircraft Earth Stations AES At the moment only the P channel can be decoded System Requirements The following items are INMARSAT traffic required to monitor Figure 15 INMARSAT system Antenna L or C Band LNA or LNB Standard Down Converter to 70 MHz Computer s W CONF interface s and W CODE decoder s with W CODE SAT option Easy SAT Control Software
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