User's Guide v2.0
Contents
1. di WR User s Guide v2 0 15 April 2010 Copyright 2009 2010 by Jose Alberto Nieto Ros nietoros hotmail com Translated to English by Al Gallo VK4LOW Introduction ROS Is a keyboard to keyboard digital communications software whose purpose is to optimise HF Moon Bounce or Meteor Scatter communications It uses a very simple human interface made up of two operation modes ROS HF and ROS EME ROSHF The HF 3 30 2 communications systems achieve their transmissions trans horizon using the ionosphere as a natural reflector to produce a global coverage in one or several skips It s important to take into account the HF channel characteristics to understand the solution adopted in the ROS HF system On the one hand in HF a multipath effect is produced the signal is reflected in several layers of the ionosphere and o the other hand the channel suffers a time change the ionosphere is a natural dynamic medium highly dependent on solar activity This justifies why the crisscrossing plays such an important role in the conventional systems and why the long delays have been accepted as unavoidable in these applications e The multipath effect involves temporal dispersion of the transmitted energy and represents an interference phenomenon between symbols which makes the channel s equalization process a very complex and critical task within the receiver limiting the system s functions e The channel s temp2. k STOP OQ d d uozneP sdw x eeN lOtwa lt 22 dB cenas de PDv vD5eB eg s lt 8TOP gt 21 dE k Z dtD5MkIF 8TOP 3 Ot CQ de RA4NCX HA4NCX RA4NCX pse k lt 8TOP gt rj ho Fd Q OQ Q a eco d 4 d p nig za LA C C my Hd BRA Oh Oh Oi IU PATH LOG DIRECTORY SIN Frame Acquisition 6 21 S N 2500 Hz 24 dB Don t create Log Files OK CANCEL Volume 5 dB Destination Inicio Multi band lel ROS v3 0 2 PATHLOG Ty ROS Nueva capturas 105 v2 9 3 lt Captura HELP gt SHORTCUTS Here we can see a list of keyboard shortcuts 4 ROS v3 0 2 Beta by J A Nieto Operator COM SoundCard E Mail Log Skeds Help X16 lt 16 52 UTO 818 Hz GQ 202 de RA4NCK RA4NCK RA4NCK pee RZ16 22 UT 315 Hz Gerr u a Lt amp AonNTTK pse lt S TOP gt RX16 lt 16 86 UTC 818 Hz OQ CQ de RAANCX BRANCE E pse k BTOP RX16 UTC lt 78 Hz CQ OQ OQ de IWPBIM IWYBIM pse k lt gt RZX16 PISTES SE OQ 5 de IW BIM IWTE pse k lt BTOP gt RX16 16 47 UTC lt 81 5 Hz CQ d uozneF s dw eeN l0twa BTOP lt 2 RX16 16 48 Hz de PDv vD5eb pse k lt RX16 UTC 818 Hz Rk o QRZ dtD5MJP lt BTOP gt EUR TO T5 TL 59 1
3. 5 dOCgnkd o geC QSO sHover a mulrSah cPannel u5i eRmXnium w_ gt Gml o Eac Ortrtefixed a Sn dOCgnkdto CeC QSO sHover mulrSah cPanel u5i NeRmXni uL P w pm o ECac Ortrte Kixed ROS 2250 8 23dB RXS 13 01 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 13 02 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 13 05 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt OLIVIA 32 1000 23dB garbage CHARACTERS ROS 2250 8 24dB RXS 13 05 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character 14 fixed lt STOP gt RX8 amp 13 06 UTC 0 0 Hz ROS HF Modes have been designed to get OSO s over a multipath channel using the minimum power for a character 14 fixed STOP RXS 13 07 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP OLIVIA32 1000 24dB garbage CHARACTERS ROS 2250 8 25dB RXS 13 19 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a char
4. A different time can be configured for each mode IA ROS v3 3 1 Beta by J A Nieto Operator Macros PTTLoop SoundCard E Mail Log Skeds Help RX1B RX16 lt IRX1B RX1B Ela o 9 CQ de IW9ELR pse Q C IZDlieP IZDIWP psek gt Q CQ de tri IWSELR My name is Ro IRX1B m all de IW9ELR Station ROS v3 3 p 10096 PSE K STOP RX16 i 3 bz de tnx fer O50 hest 73 VIVOU de sk STOP 3 dB mE IS PTT Loop Configuration RX16 03 en CON S500 Die 5 5 MODE LOOP TIMER 16bauds 4 00 25 h Eram 7790 8 bauds lt 00 30 S N 2500 H2 23 dB Iba j 00 45 B VU EME 3 00 45 Volume 6 dB Destination Inicio Multi band We amSpots 105 v3 3 1 PTT Loop Confi Ci ROS Nueva Gu Captura by SOUND CARD MENU We select the card in as well as out Some PCs demand you to be the administrator to avoid any sound card changes Some others don t Windows mysteries IA ROS v3 0 2 Beta by J A Nieto Operator COM SoundCard E Mail Log Skeds Help RZX16 RZX16 RZX16 RX16 RZX16 RZX16 Inicio UASTN de TAIBM NOW SENT E amp L DE TA1BM STOP O dE T uunxneu Ismaiavi tleK lRrv in any booNn mtuer baiMtF y fo de RA4NGX RA4NGX RAANIX pse BTOP iE RA4NCK RA4NGX RA4NCX d
5. 21 dBs where the ideal 16 baud modulation limit over AWGN noise is 23 dBs It means just 2 dBs fading margin for an 18 000 kilometres journey RX16 04 24 UTC 15 6 Hz ZL2FT ZL2FT ZL2FT de RA6DJ RAO6DJ RA6DJ kn STOP 2 dB RX16 04 26 UTC 15 6 Hz ZL2FT de RA6DJ My name is Ivan my is Krasnodar Locator KN95ma S N 21 dB Marge 2 dB STOP 4 dB RX16 04 27 UTC 15 6 Hz RRRRRRStation ROS v3 3 0 Beta TS 850S 20W Ant A3S Yagi tnx fer QSO GB 73 ZL2FT de RA6DJ sk STOP 2 dB RX16 04 28 UTC 15 6 Hz Long path Jason73 STOP 5 dB RX16 04 29 UTC lt 15 6 Hz 73 the best QSL via e qsl ZL2FT de RA6DJ sk STOP 6 dB Jason ZL2FT used an inverted V dipole and only 10 watts from New Zealand via ZL2FT Woked Ivan RA6DJ on 20mtrs 14 103mhz Ros at 0424utc 100 copy both ways i was running 10 watts into my inverted vee with a Ic Another advantage of ROS over other systems that also widen the spectrum like OLIVIA is that ROS HF makes use of the advantages of the diversity in frequency without this affecting the system s effectiveness over gaussian noise So considering an equal transmission speed ROS 8 2250 offers a sensitivity 5 dBs greater than OLIVIA s 32 1000 for the same speed transmission of 150 characters per minute The automatic reception system at any symbol rate allows compatibility between radio amateurs who are using different tra
6. Correct 2 ROS No database Nil Frame lock Nil Frame lock RX lt 22 17 UTC lt 2 9 Hz VK3SIT 9 STOP RX 22 19 UTC lt 2 0 Hz QE37 gt lt STOP gt Correct 2 JT65a with database 222500 4 23 02 03 VK3I1 VK7MO QE37 222700 1 23 0 1 01 VK3II VK7MO QE37 222800 4 21 02 03 VK3I1 VK7MO QE37 222900 3 24 0 2 03 VK3II VK7MO QE37 Correct 4 ROS No database RX 22 61 UTC lt 0 0 Hz VK VK7MO QE37 I O STOP RX lt 28 55 UTC 1 0 Hz VK7MO 0 9 STOP RX 89 565 UTC lt 0 5 Hz VK7MO QE37 STOP RX 22 67 UTC LO Hz VKSII VK7MO amp STOP Correct 3 JT65a with database 224200 1 28 0 2 03 VK3II VK7MO QE37 224300 0 33 8 8 43 3 224400 0 26 0 3 03 224500 0 28 0 1 03 Correct 1 0 10
7. DESTINATION DESTINATION DESTINATION de lt MYCALL gt MYCALD MYCALD kn CALL DESTINATIONS de lt MYCALL gt 00000000 My name is NAME my ATH is Locator 05700000000 BYE imterQS0 73 lt DESTINATION gt de MYCALD sk 4 4 4 4 4 4 4 Emait lt EMAIL gt lt EMAIL gt lt EMAIL 2 4 4 4 4 4 4 4 4 4 4 Inicio ROS Nueva Guia2 v3 2 1 Beta 8 Macros Multi band WebSDR i z Captura by HernanSoft COM MENU We will chose the COM port connected to our interface to a virtual COM or to any similar mechanism When the transmission starts the pin RTS of the chosen port is activated ROS v3 0 2 Beta by J A Nieto Operator Soundcard E Mail Log Skeds Help GSU TO TEIDM hBO VICTOR D8W BYE DE TAIBM Frame Acquisition 5 21 Frame Acquisition 5 21 ior hes Acquisition 0 16 Symbol Synchronization 1 Frequency Shift 15 6 Hz Errors by Viterbi 60 AEN 2500 Hz 24 dB Channel Alarm Bw Symbol Rate WaterF all HF ON 200 Hz 2250 Hz i ON 16 i b EME OFF 78 Hz 500 Hz OFF 7dB dB OR CPUUsage 2 22 Destination NONAME 7 Inicio 7 Multi band ROS v3 0 2 ROS Nueva gt capturas nos v2 9 3 5 Ventana Pri Captura by PTT LOOP MENU This is to configure the margin times between successive transmissions when we use the option PTT Loop
8. Hz OQ OQ 25 de RA4NCX RA4 RZ16 Halil ta 3138 H tood miVM 16 TC 318 Hz T KOX 1 RAdOX RXC16 34 UTO S18 Hz co ten CR otDezL RX16 4 UTO 818 Hz CQ CQ CQ de PD ESC Emergency PTT STOP Fl CQ CALLS CALL Viterbi d ME RO Frame Frame Acquisition 6 21 6 21 Final Final Acquisition 0 16 0 16 Station RRR Errors Enors by Viterbi 56 Viterbi 56 S N 23 dB Custom SIN F10 Reserved 5 0 5 dB CPU pue od 20 F11 Clear RAPT ONORE Destination Inicio Multi band DESCRIPTION OF INDICATORS Frame Acquisition shows how many of the 21 possible Initial Plot symbols are being received correctly A minimum of 13 21 is necessary for the receiver to start demodulating which gives us a sensitivity level much higher than what the demodulator is really able to decode In ROS HF the symbols of the initial plot are crisscrossed in time and in frequency In ROS EME they are only crisscrossed in time i h At times the Frame Acquisition will be activated at 13 21 or 14 21 indicating that we are receiving a message in very poor conditions but the demodulator won t be able to decode it if it arrives below the reception threshold At least in this case we know that somebody is trying to contact us and we can report asking to try an 8 baud transmission or if at all possible to increase power This procedure can also be
9. ICE eve 01 UN E mail Options X ba be C Ihave a Mail client babe User Name osealbertonietoro gmail com Password Frame Acquisition 5 21 If you wish you could create an exclusive Gmail account with a different password have a Gmail account C have no an internet connection Volume 5 dB Report Options Report only the last message received C Report all my RX screen Inicio 2 Multi band GP ROS Nueva capturas 105 v2 9 3 Ventana Pri T AH S N 2500 Hz 22 dB WaterFall ON Captura ESR 18 44 LOG MENU We select the directory where we want to save the LOG files Each time the screen is cleared or the programme is turned off a LOG file is created automatically registering all our activity 81 ROS v3 0 2 Beta by J A Nieto Operator COM SoundCard E Mail Log Skeds Help EX 16 26 UTC Hz O a e oglBoleli f C OQ OQ dm RAANCX BAANCX RAANOX pex k lt 8TOP gt 17 EL RAANCX RA4NCX de UNTTK UNTTK UNTTK kn STOP ESL FRAME SCREEN GQ de 6n4NCK RA4NCX RA4NCX STOP lt 21 GQ de RA4NCK RA4NGX BA4NGX peo k STOP 16 dB Gerr CCu Lt amp AonNTTK pse STOP 36d 2 920808 de RA4NOX RAANCX iNRX pse BTOP z gt OQ CQ IWTBIM IWTBIM BTOP gt 09 OF 09 oe IWTBIM
10. S N QSL ae cm a Inicio HamSpots Ham Radi Operation protocols There are two operation protocols in the ROS mode one for 16 and 8 baud and the other for 1 baud Protocol for 16 and 8 baud In this case the nomenclature is similar to other digital modes such as PSK31 MFSK RTTY etc Most of the buttons will appear familiar ca zd P rE cu SN QSL ame cm We will highlight some innovations e This button inserts your email address between the two special characters and gt This way all the operators who are listening will send an automatic reception report to the email address you inserted in the message The report includes the message such as it has been received with data related to the operator who has copied the signal s telemetry You may receive email similar to this one Please don t reply to this email JOSE has received your Radio Message sent at 08 05 UTC Received Message PE1GCB de YU1XX OK DR VIKTOR tnx fer QSO 73 PE1GCB de YU1XX sk Email lt yu1xx ros gmail com gt lt yu1xx ros gmail com gt lt yu1xx ros gmail com gt PETGCB YU1XX SK lt STOP gt Operator Info Callsign JOSE Name Jose Alberto Nieto Ros E mail nietoros hotmail com QTH La Aljorra Cartagena SPAIN Locator IM97lq Station Listening on webSDR at University of Twente The Netherland ROS Version 3 0 2 Beta Signal I
11. moon bounce new mode ROS EME had not yet appeared at that time This is the screenshot sent to us by SV8CS Lj RUS WL AU Dy LAMET Operator COM About Alarm E SCREEN FO TT Sat Ty M gar GAT 1 MESE E Ip V EDD k s u Symbol Rate 16 baud Auto E 1 baud Manual SUMMARY Bandwidth has been traditionally the enemy number one of the radio amateur due in part to poor disclosure of digital technology since the beginning of its application in the world of amateur radio In general it is considered that the mode is more efficient and requires less power when the bandwidth gets lower because the filter can be narrower It s just the opposite The larger the bandwidth the higher the strength to overcome fading and interference Due to its CDMA nature and FEC correction ROS HF allows establishing and sustaining communications with fading margins much lower than those of conventional systems According to tests carried out with radio amateurs from all over the world a fading margin of only 4dB can be enough even in 18 000 kilometre journeys In other words this technology optimises the average energy transmission An outstanding QSO took place between Krasnodar Southern Russia and New Zealand with only 2dB Fading Margin Messages coming from the European side were intercepted in Twente eastern Netherlands Ivan from Russia comfortably copied Jason from New Zealand with S N
12. of HF and the frequency diversity systems don t provide any significant advantage That s why the modulation system used is the classic 16 tone MFSK To ensure a better orthogonality the tones have been separated by 4Hz a more than sufficient amount to achieve a 64Hz bandwidth The slender bandwidth required by this modulation allows us to perform automatic frequency scanning of up to 1300HZ very useful to detect Doppler shift when working Moon Bounce on 70cm The symbol rate is 1 baud being a mode that also decodes in real time allowing the asynchronous Moon Bounce communication as well It can decode signals of up to 35dBs over noise AWGN In addition ROS EME uses an initial synchronism sequence that allows detecting the received signal s Doppler shift and subsequently starting to decode real time ROS HF as well as ROS EME use as FEC the popular convolutional code R 1 2 K 7 NASA Standard This software sends automatically reports to the operators who include their email address in any of their messages The reports include reception conditions and information about the receiving station More details on this manual Hardware and Software requirements SSB transceiver connected to an antenna PC with Windows Operating System A minimum 600MHz CPU with 128MB RAM Monitor with resolution 1024x768 or 1024x600 16 bit Sound Card Interface to toggle the transmitting station s PTT Installation Before opening ROS
13. 2 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP RXS 12 53 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP RXS 12 54 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP OLIVIA 32 1000 21dB wUeOSMF Modes 3ave been esigned t get QSO s ove mslWipath channel usigjthe minimum power f9r a chagVSter rate fixed ROtMF Modes 3ave been e igned get QSO s ove mltipath channel usigjthe minimum powe f9 r a chagaSter rate fixed SOtMF Modes ae been e igned get QSO s ove mltipah chInnel usigithe minimum powu fFr a chagaSter rate fixed ROS 2250 8 22dB RXS 12 56 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP RXS 12 56 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP RXS 12 59 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed STOP OLIVIA 32 1000 22dB s a Sn dOCgnkd o CeC QSO sHover mulrSah cPanel 5 NeRmXni uL w Gm o Eac OrtrteKixed 4 Ks
14. 960 QUIENAATA AELG ac FA To finalize we want to thank Serge for sending us the news and in general to the radio amateurs worldwide for making experimentation the first commandment of amateur radio APPENDIX 1 COMPARISON ROS 8 2250 vs OLIVIA 32 1000 some radio amateurs more or less intentionally compare 16 baud ROS HF with systems that are 2 and 3 times slower with a purpose to arrive at their own conclusions This demonstrate their partial or complete lack of knowledge about the fundamentals of a digital communications system To measure the efficiency of a digital system the speed of the information which is the rate of characters per minute must be taken into account To situate and recognize the ROS HF s figures a comparison was made between two systems transmitting at the same speed 150 characters per minute as ROS HF 8 2250 and OLIVIA 32 1000 The results demonstrate that for the same rate of characters per minute ROS 8 2250 needs 5 dB less power than OLIVIA 32 1000 or putting it in another way 3 times less power ROS 2250 8 19dB RXS lt 12 43 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 12 44 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 12 45 UTC 0 0 Hz ROS HF Modes have been design
15. F 500 2 a filter centred on 1000Hz with enough bandwidth to let the 500HZz signal through can be used In ROS EME the filter must be centred 1532Hz and the bandwidth must be over 64Hz This waterfall image shows a transmission from a radio amateur wrongly using an Filter We can see that the signal appears chopped below the 1500Hz In spite of this problem the programme still manages to synchronize and decode the signal with the information present in the tones that have survived in the top area of the spectrum However we won t get good results or DXs if we eliminate 50 of the signal right from the start Frec 1755 0 Hz Shift 255 0 Hz The first QSO with ROS The first QSO took place on the 18th of February 2010 at 20 56 from Vitoria Spain to Twente University in The Netherlands covering a distance of 1 265 Km in 7 065Mhz oms Rd Sat lite Relieve Satve United a Nyhavn i 4 jet 3 de ary Banal _ DOCI 1 Deutschland Germany Pann Wiki Canard H Orta The first Moon Bounce with ROS EME The first radio amateurs to achieve it wereDL8EBW SV8CS on the 22th of February 2010 at 21 01 UTC SV8CS used an array of four 16 element yagis and 100 watts DL8EBW used 2 yagis and 100 watts Actually this QSO was achieved with the 1 baud ROS HF mode as the
16. VED FROM 16 335 KM MY QTH VK4YEH has received your Radio Message sent at 08 02 UTC Received Message VKAYEH VK4YEH VK4YEH de IZIx yE IZIMKE IZIMKE kn Email Operator Info Callsign VKAYEH Name Tim E mail vk4yeh gmail com Brisbane Australia Locator QG62ll Station FT 950 ROS Version 3 5 0 Beta Signal Info Channel HF Symbol Rate 8 bauds BW 2250 Hz Frame Acquisition 18 21 Final Acquisition 14 16 Frequency Shift 27 5 Hz Symbol Error detected by Viterbi 20 S N 2500 Hz 21 dB Fade Marge 5 dB PTT Loop Disabled Vumeter Level 16 dB CPU Usage 12 96 Congratulations for the QSO QSO BELGIUM NEW ZEALAND WITH 3 WATTS Finally we highlight this great QSO that best summarizes the rationale for this new mode ROS HF Serge ONSWP Belgium contacted ZL1RS New Zealand using only watts and a vertical antenna on 14 103 HELLO JOSE GREAT CONTACT 05 05 2010 08H29 IN ROS 16 PWR 5 Wtt ICOM 703 ANT VERT 12 AVQ GRND ON I4 105 WITH BOB ZLIRS DISTANCE MY LOCATOR JOIOUJ LOCATOR ZLIRS RF64US 18 170 KM IN JOSE CONGRATULATION FOR THE PROGRAM ROS GOOD GOOD 73 s DE SERGE ON3WP QRP SE as T a SEK eR Ak TEM 7 IS BOB BOB BOB RST 559 559 559 lt STOP gt Dn Aur fum lt ka Joc gt aye aes L Lou 1 S Avia Air amp Ja 09 peo pole AQ Sec EA e Joge 4 233
17. acter rate fixed STOP RXS 13 20 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the miniBi power for a character rate fixed lt STOP gt RXS lt 13 21 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt OLIVIA 32 1000 25dB garbage CHARACTERS ROS 2250 8 26dB RXS lt 13 24 UTC 0 0 Hz iOS HF Modes have been designed to get OSO s oveooe Yoetipath channel using the minimum power fM chare er o ve fte ad STOP RXS 13 25 UTC 0 0 Hz a OS HF Modes have been designew get OSO s oveooe path using the minimum power chare er o ve fteeed STOP RXS 13 26 UTC 0 0 Hz a OS HF Modes have been designew get QSO s over W coetipath uhannel using the minimum power n chare er o ve fteeed STOP OLIVIA 32 1000 26dB garbage CHARACTERS ROS 2250 8 27dB nO SYNC OLIVIA 32 1000 27dB garbage CHARACTERS APPENDIX 2 COMPARISON ROS vs JT65 The tests were carried out over a tropospheric link by Rex Moncur VK7MO Below are the troposcatter test results from Jim with four transmissions alternating between modes You will see that was not always consistent with the Jt65a message which did not always include the OOO so let us compare on the basis of correctly receiving VK3II VK7MO QE37 On this basis ROS decoded co
18. all CQ with the minimized window while we do something else in the computer If we also have the Alarm commutator activated the system will emit a sound to let us know someone is sending a report In the PTT Loop menu we can configure the time margins between successive transmissions Menus OPERATOR MENU Here we must fill in the fields appearing in the form In the email box we must type the email address where we want the reports to be sent We can send the reports from a different email address which can be configured at the Email Menu The Custom option is a sort of macro related to the button Custom AROS v3 2 1 Beta by J A Nieto Operator Macros SoundCard E Mail Log Skeds Help JL CANCEL CLEAR 8 Operator Callsign JOSE Jose Alberto Nieto Ros SIN Frame Acquisition 6 21 E mail nietoros hotmail S N 2500 Hz 25 dB QTH Cartagena SPAIN PTT Loop ON w Locator M97lq n 68 Station Listening on webSDR at University of Twente The Netherland Destination ENTER SAVE CLOSE Inicio Gy ROS Nueva Guia2 el ROS v3 2 1 Beta by 0 operator Multi band WebSDR i Captura by HernanSoft MACROS f amp l ROS v3 2 1 Beta by J A Nieto Operator Macros SoundCard E Mail Log Skeds Help mE CANCEL CLEAR tic FRAME SCREEN Macros E CQ Ca de lt MYCALD lt MYCALD MYCALD CALL3
19. applied to EME Due to probability issues the indicator usually shows a value around 6 21 or 7 21 even though just noise is being received Final Acquisition It tells us the number of Plot Stop symbols out of a total of 16 This indicator is the previous one s cousin h Final Acquisition 0 16 symbol Synchronization Basic parameters in any Digital Communications system Shows us the instantaneous frequency deviation between both transceivers VITERBI Indicates the percentage of errors detected after comparing the symbols received before and after Viterbi The convolutional code used in the ROS modes is the popular k 7 1 2 NASA Standard Viterbi S N Signal to noise ratio related to a reception bandwidth of 2500Hz SIN n Vumeter Volume level It should be between 15 and 3 dB V Volume 8 dB CPU CPU use If your computer 15 very slow it is recommended to configure the AFC to 78 2 and deactivate the waterfall The other option is to use a more modern computer Usage 23 WATERFALL The waterfall or spectrogram helps us to check that the initial tone is confined within the red lines Here we can see a 16 baud capture The tone here has been shifted It s equally valid there s no need to move the transmitter s dial RECEPTION FILTER Some radio amateurs use reception filter programmes mainly for DX following a practice simila
20. e TAIBM kn lt 8TOP gt lt e Of e 180 1 lt 3 dE CQ c de RAANOX RA4NGX RA4NOX pce lt 1 dE RAANOX RA4NGK RA4NCX UNTTK UNTTEK UN TK kn lt OQ de 6n4N RAAN pse k gTOP 21 dE CQOQCQ de RA4NCK RAANOX RAANOX pee P HE LtaAcnN7TK pse K lt gt lt 86 2 OQ C RAA4NCX RAA4NCX iNRX pse GQ IWTBIM IWTBIM IWTBIM pse K lt 0 SoundCard Configuration Viterbi Emul OKs Audio DCEO Errors by Viterbi 36 Emut OKx Audio DCE0 Symbol Rate 3 16 8 1 SAVE CLOSE Multi band 2 ROS v1 05 Nueva capturas 105 2 9 3 i ventana Pri L D CLEAR SIN S N 2500 Hz 25 dB 3 Captura by EMAIL MENU Here we select the email address we want our reports to be sent from We can use an SMTP server presently without verification or which is the easiest to create a gmail account for this purpose In Report Options we can select to report the received message only or all that is shown in our reception window A ROS v3 0 2 Beta by J A Nieto Operator COM SoundCard E Mail Log Skeds Help LLa 0239211 L LIIV MUVI OLN u y 21 1 1215 LIL 2 J Ul Hz uunXneu Ismaiavi tleK 1Rrv in any booNn untuer beiMtF y fo a ay s a gt 1 O1 O1 Or Or Or Or
21. e to 16 depending on the quality of reception and fading margin we want to work with ROS 1 baud The 1 baud option in HF is extremely robust because of the crisscrossing length and the long 1 second period of integration We can experiment with another radio amateur using this mode reducing power progressively and reporting the received S N Water all ON DFF Activates or deactivates the waterfall Deactivation of the waterfall highly reduces the computational load which helps slow computers Besides activation isn t mandatory to decode correctly Destination NONAME ENTER Here we must add the destination call sign To do this we select the received call sign with the mouse and click ENTER to paste it RAIS eltsa uro lt 7 S de REGLEH My name is YURL my TH is nr Erasnodar ADA EFR eS Locator 16 FlAFA de RESDH z2TOP 18 dB ALS lt 14 24 159 5 Hz WOCY de Bie Station veo Beta Yaesu FISAF ant FB SS A N 18 dB Marge 10 dE PEs HHM lt P IOP gt lt 11 dB 16 lt 14245 lt 155 Hz tra fer 80 Weoy de PESHHN sk lt gt 8 dBE lt can also be typed in PTT Loop DFF PTT Loop allows us to transmit continually and automatically leaving a certain time margin between transmissions If the software synchronizes a message within that period the transmissions automatically stop This is a useful option to c
22. ed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt OLIVIA 32 1000 19dB ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed ROS 2250 8 20dB RXS lt 12 48 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 12 49 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt RXS 12 51 UTC 0 0 Hz ROS HF Modes have been designed to get QSO s over a multipath channel using the minimum power for a character rate fixed lt STOP gt OLIVIA 32 1000 20dB rZOS 9F Mode cve been desi amp ned to get 0806 of3r a multipath channel usng the inimum power for a character rate fcxe5960 L amp 3 ROS HF Mdes have been desi amp ned to get QSO s ofer a multipath channel ysing the minimum power for a character rate fcxe5 XO ROS HF Mdes have been desi amp ned to get QSO s ofer a multipath channel using the minimum power for a character rate 5 ROS 2250 8 21dB RXS 12 5
23. for the first time it s necessary to execute the file install exe The latest ROS version can be downloaded from hitp rosmodem wordpress com Main window S ROS v3 3 1 Beta by J A Nieto Operator Macros COM SoundCard E Mail Log Skeds Help z gt CQ CQ CQ de RA3ZSE RA3ZSE RA3ZSE pse lt STOP gt lt 18 dE E is CLEAR SCREEN 1 Hz ra3wbz de do you copy me dr om n pse kk STOP lt 4 dE SAVE CANCEL z gt eyneoEboao rhD c c aee Mol CAN a aS LOG FRAME Hz pwbz d kb MYCAudhnixi amampUhstvatore my alis Estes JM4a u ott O t x tMfOo2z CT RABDJ de TATBM My name is ISMAIL my is ISTANBUL Locator uiaQusce nation oS v3u 0 Beta TS Im 0 S ant HF9V GP 30 iz CQ CQ de USSUC USSUC USSUC psek STOP lt 10 dE Hz DJ4XR de RA3ZSE GE MY FR name is Anatoliy Locator KOBOWS S N 0 dB Marge 26 dB DJ4XR de RA3ZSE STOP 5570 17 dE RAGDJ de My name is ISMAIL my is ISTANBUL Locator KNAOLX Station ROS 1390 Beta 730 5 ant HF9V GP 30 5 53 UTC lt 0 0 H2 TAIBM de RABDJ QSL via e qsl tnx fer QSO 73 TATBM de RABDJ Frame Acquisition 0 21 Final 2 16 Channel Alarm AFC Bw Symbol Rate Rx Auto WaterFall PTT Loop HF ON 200 Hz 2250 Hz E 16 8 1 ON ON VU i RB I f EME OFF 78 Hz 500 Hz 16 8 OFF OFF Volume 6 dB CPU Usag Destination NONAME CALL3 ca d BYE
24. ing when carrying out Moon Bounce tests We could send our email address as a message lt nietoros hotmail com gt At times when there s no reply we could check if a station somewhere in the planet copied us what were the reception parameters and as Jos Luis Perales would ask What do you do with your free time Buttons for the ROS HF 1 baud and ROS EME modes CO CALL EO ud BYE S N ael gm A timing device is set for 45 seconds at the end of each transmission This is necessary to know if someone is replying If the synchronism hasn t been activated during that period we may start to transmit again Decoding in EME mode takes place in real time too This allows us to transmit in an asynchronous way and the receiver will be always prepared to decode irrespective of UTC time The only thing needed is to point the antenna towards the Moon and wait Description of the buttons and controls SAVE LOG Manually creates a log file with all the information that appears on the screen This file can also be created automatically using the log menu Clears the reception window CANCEL FRAME CLEAR SCREEN Cancels the reception and the software gets ready to decode the following message This is normally carried out automatically but this button allows us to cancel decoding manually Channel HF EME selects the HF mode for skip ionospheric communications or EME mode for Moon Bounce tropospheric o
25. nes Alarm DN OFF It warns us through the PC s speaker when a message is received This option is well suited to keep on listening while carrying out other activities in the computer with the programme minimized AFC 200 Hz 70 Hz Selects the frequency range search in the acquisition phase as well as the tracking one If your computer is somewhat slow it s recommended to keep it at 78 Hz in order to use fewer resources That range is satisfactory for most QSOs This range is defined in the waterfall by two red lines For accurate reception it s only needed that the initial reference tone appears within the two red lines and it doesn t matter if it is precisely at the centre The software produces the tuning automatically and the AFC will show us the frequency shift that can take place during the transmission The ROS EME range for 2 metres Moon Bounce is 600 Hz or 1300 Hz for higher frequencies Bw 225 Hz 500 Hz selects bandwidth in ROS HF mode This bandwidth is independent from the Rate oymbol There s been some confusion here because some radio amateurs wrongly associate 500Hz with 8 baud and 2250Hz with 16 baud and you can see that the numbers don t work out In this case the bandwidth is independent from the symbol rate All in all ROS at 2250Hz can work at 16 8 or 1 baud as well as ROS 500Hz For the same symbol rate the 2250Hz option is more robust than the 500Hz one for communications via the ionosphe
26. nfo Channel HF Symbol Rate 16 bauds BW 2250 Hz Frame Acquisition 21 21 Final Acquisition 16 16 Frequency Shift 15 6 Hz Symbol Error detected by Viterbi 2 S N 2500 Hz 13 dB Fade Marge 10 dB Anti Jam System Enabled Vumeter Level 6 dB CPU Usage 5 Congratulations for the QSO This report gives you an idea of how your message has been received and offers intriguing details about signal quality To be able to send such reports you must properly configure the Email Menu and of course have access to an Internet connection S N SN This button is to show the mean S N ratio received and the Fading Margin available As it happens with voice communications the S N ratio is for a reception bandwidth of 2500Hz Example S N 8 dB Margin 15 dB This shows that our mean S N ratio is 8dbs and that we have fading margin of 15dBs to the reception threshold which for 16 baud is 23dBs The AWGN reception noise thresholds for ROS modes are ROS 16 baud 23 dBs ROS 8 baud 26 dBs ROS 1 baud 35 dBs ROS 35 A certain margin of fading is normally needed to achieve reliability in a communication especially in HF where the signal level as well as the interferences change significantly during the transmission One of the main features of the ROS HF mode is that the length of the crisscrossing is also closely related to the bandwidth allowing to increase the depth of the crisscrossing witho
27. nsmission speeds Messages at 16 or 8 baud can appear on screen any time independently of what is the symbol rate we re transmitting with Due to its CDMA nature ROS HF supports simultaneous transmissions sharing the same operation frequency with minimum interference amongst users making a more efficient use of the spectrum This is one of the cutting edge technologies used in telephony 3G Blue Tooth and specially in military HF systems where CDMA originated The relationship power vs time has reached in ROS maximum optimisation to attain the highest possible symbol energy This means that ROS can reach further away with smaller antennas and lower radiated power precisely what is sought after in QRP The 1 baud mode is ideal for extreme QRP Regarding the user s interface the approach is to create a Spartan result limiting as much as possible the superfluous colours and instruments leaving only those truly essential ROS is able to correct Doppler shifts of up to 1300Hz 2600Hz in total working in real time Achieves benefits similar to WSJT decoding any text without having it memorized in a database in advance In other words it can also decode non standard messages with the same sensitivity as standard ones The system s ability to send reports via email lets us Know how our message has arrived and who has received it Franco IZ1MKE for example received this email after starting a QSO with Australia VK4YEH ROS RECEI
28. oral variability entails complete signal fadings perceived by the radio amateur as connection loss n conventional systems the crisscrossing breaks the error bursts produced by the combined effect of both factors helping the decoding process to function adequately For this to be effective these crisscrossings must be very large creating considerable delays in the system The alternative developed for ROS HF is based on the CDMA type modulation This isn t actually Spread Spectrum because the 3khz HF standard channel is maintained but rather the transmission of crisscrossed symbols along the full available bandwidth crisscrossing the symbols along the time as well This allows dealing with an adverse channel situation when some frequencies cancel or disappear In this case the symbols can be recovered through a suitable information reconstruction procedure ROS HF has three symbol baud rates 16 8 and 1 The last one is most suitable to detect extremely weak signals in HF The coding system is popularly known as convolutional code R 1 2 K 7 NASA Standard Another innovation of this software is that it can automatically detect transmissions at 16 8 and 1 baud indiscriminately allowing the change of symbol rate according to propagation conditions and without the need to previously inform our contact ROS EME is a mode designed for Moon Bounce communications The communication channel in this modality is quite different from that
29. r to that used in analogic communications and CW This is suitable for an improved listening to the signal but not for the software to decode it correctly Filtering in the digital world is quite different from that of the analogic where the term adapted filter is used to describe what maximises the S N at the integrator s output So in digital systems the insertion of additional reception filters or automatic gain control systems etc can only add distortion and further degrade the signal The decoding software already takes care of the optimum filtering of the signal The insertion of additional filters while using ROS EME prevents the system from scanning the whole spectrum correctly to detect Doppler shifts of up to 1300Hz With respect to ROS HF to be able to scan correctly in the range of 200Hz the bandwidth should logically be 400Hz larger than the signal s bandwidth 2650Hz total With a reception filter adjusted to 2250Hz as done by some operators the signal will not only be distorted but we are also limiting the correct functioning of the system s AFC detection when the signal arrives shifted in frequency Summarising don t apply any reception filter with this system because it won t improve reception quality TRANSMISSION FILTER A filter can be used for transmission to avoid interference to adjacent channels or frequencies In the ROS HF 2250Hz modes a voice bandwidth filter can be used In ROS H
30. re Symbol Hate 16 1 Symbol Rate transmission selection to 16 800 characters minute 8 150 characters minute or 1 baud 20 characters minute HA 16 8 1 16 9 ROS can automatically detect and decode transmissions that reach us with symbol rate different from the one we are using This control allows you to select whether you want to detect only 16 or 8 baud or any of the three rates available This system permits to alternate transmissions at 16 and 8 bad during a QSO with the certainty that your contact is always ready to decode each one When to use ROS 16 and when ROS 8 At 16 baud we can transmit at a rate of 300 characters per minute while at 8 baud we can transmit at only 150 On the other hand the 8 baud mode is 3dBs more sensitive than the 16 baud one Using the macros the 16 baud option is normally more satisfactory but if our contact reports reception problems it s most effective to immediately change to 8 baud taking advantage of the automatic detection mode that is part of ROS When there are many amateurs operating in the same frequency it s preferable to work at 16 baud except when the reception level is poor In this case you re forced to change to 8 baud When the frequency is clear it s convenient to call CQ at 8 baud mainly for DX or QRP which will make it more likely to be copied by another radio amateur Once a contact has been established we can decide to continue at 8 or chang
31. rrectly 9 times compared to JT65a 8 which is no significant difference given the propagation variability In addition ROS gave some useful partial decodes which would be helpful in a marginal QSO What l think we can say is that on a tropo scatter path ROS is no worse than JT65a in deep search mode and that the signal generator and AWGN tests are therefore a reasonable representation of the relative merits Of course EME might be a different issue but at least it is encouraging am now running longer term tests with David VK3HZ over a more difficult troposcatter path to see if they add to the story and will let you know Rex ROS No database RX 21 59 UTC lt 0 0 Hz VK II 2 3QE37 O lt XH STOP Nil Frame lock RX lt 21 43 UTC lt 0 0 Hz VK TI VK7MO QES7 D6 JD V56865 A CANCEL Nil Frame lock Correct 1 JT65a with database 214800 1 28 0 1 0 3 VK3ll VK7MO QE37 O 10 214900 0 33 6 8 100 46 215000 0 27 0 1 029 215100 2 28 0 1 0 3 Correct 1 ROS No database RX 21 56 UTC lt 0 5 Hz QES7 OOO lt STOP gt RX 21 58 UTC lt 0 5 Hz VKSIT VK7MO 0 97 OOO STOP RX 22 00 UTC 1 5 Hz VKSIT QES7 OOO lt STOP gt RX lt 22 02 UTC 0 5 Hz VK II QE gt 6HK gt STOP Correct 3 JT65a with database 220800 0 27 0 1 04 220900 1 27 0 1 03 VK3II VK7MO QE37 0 8 221000 2 27 0 1 02 VK3II VK7MO QE37 0 10 221100 0 33 1 9 81 26
32. ut adding additional delay In this sense a wider bandwidth can make the communication more stable and get the system to function with lower fading margins This is recommended as long as the 2250Hz option can be used instead of the 500Hz for DX or QRP m This button activates or deactivates the RTS pin of the COM port we have selected Automatic stop It s not necessary to wait until the whole message has been transmitted to press STOP We can press STOP just after the transmission has commenced and it will stop automatically once all the message characters have been sent Protocol for 1 baud HF and The operation protocol is very similar to that used by programmes such as JT65 but not exactly alike In this case a total of 5 messages Is required to complete a QSO CQ 000 RO RRR 73 1 2 3 4 5 Example QSO CQ EA5JJ IM97LQ message from EA5JJ EABJJ EASGSS HNS4S8ST EA3SS received CQ and answer EASGSS BABJJ RO EA5JJ answer to EA3SS with RO RRR 55 answer with RAR RRR 75 EA5JJ answer with RAR and finish In practice however individuals often write the messages their own way This doesn t cause any problems because ROS decodes standard messajes known beforehand and non standard ones with the same sensitivity Therefore you can write in the text window whatever you wish including your email address to receive a report even in Moon Bounce EME This is especially interest
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