VARA HF Modem

VARA is a High Performance HF modem based on OFDM modulation. VARA Modem, brings  state of the  art Military  grade technology to  new  and  existing HF data.

Introduces a new  standard of technology available for Amateur and  Commercial use. Designed for operation within a SSB Bandwidth of 2400 Hz.

VARA (600 x 186)

Providing uncompressed User Data Rate to 5629 bps at a low  (S/N 14.5 dB @ 4kHz)

Levels

37,5 bps Symbol Rate with 52 carriers

Imagen1

 

  VARA HF Modem

 

 

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70 Responses to “VARA HF Modem”

  1. José Alberto Nieto Ros Says:

    Hola,

    En radioafición, aunque fuera de 200dB no vas a notar ninguna diferencia, ya que el ruido radioeléctrico y la distorsión del canal es infinitamente mayor que el propio de la tarjeta de sonido. Cualquier tarjeta de sirve de sobra

    saludos

  2. Pirat3 Box Says:

    Es mejor para VARA una tarjeta de sonido con mejor SNR? He visto que algunos equipos como el FLEX o ICOM traen incorporadas unas tarjetas bastante pobres (pcm2901) con un SNR bajo, de 89DB y he visto otras tarjetas mas profesionales como algunas Sound Blaster que traen un SNR de 116DB y en definitiva, todo bastante mejor, como la “respuesta de frecuencia” o la “distorsión armónica”.

    Saludos

  3. José Alberto Nieto Ros Says:

    funciones de sincronizacion

  4. ANgazu Digital Says:

    Hola Jose Alberto

    Segun los analisis, el modem usa una libreria de 48 tonos para los MFSK y OFDM.
    En algunos ACK y algún final de emisión en MFSK , aparece un tono 49 en la parte superior del espectro. ¿Tiene alguna función especial?

    Gracias.
    ANgazu.

  5. José Alberto Nieto Ros Says:

    Son señales de calibración de VARA SAT

  6. Pepe potamo Says:

    Hola.
    Gracias por responder.

    Las grabaciones las efectue del satelite EsHail2 y antes de la llamada del modem aparecen las partes en banda estrecha.

    Si me envias un correo a angazu@radiofrecuencias.es te manso el espectrograma y algun tros de señal para que lo veas.

    Saludos.
    ANgazu.

  7. José Alberto Nieto Ros Says:

    Hola Angazu,
    ¿que grabaciones?

  8. Pepe potamo Says:

    Hola.
    En algunas grabaciones hay una especie de llamada usando 7fsk con los mismos parametros que la llamada normal del VaraSat modem. ¿Pertenece a este modem?

    Saludos y gracias.
    ANgazu.

  9. Jabi Aguirre Says:

    Hola Jose. Me dice Aitor de Gasteiz que estas buscando beta tester para el QO-100. Cuenta conmigo.Mi email es: petorrin@euskalnet.net
    73,s de Jabi, ea2aru.

  10. José Alberto Nieto Ros Says:

    send me some screenshot to my email

  11. Peter Knol Says:

    I did ask a om here in my area to instal Chat + VaraSAT. He, PA4GB (also QO100 active) has the same problem. TCP led stays red. No communication. Today I did switch all virus scanners off, but also no luck…

  12. Peter Knol Says:

    I did delete all VARA stuf. After reinstal and start Chat, Windows Defender Firewall asks if it is ok that VaraHF gets acces to network. Same happens when I start VaraFM. That Windows Defender Firewall does not pop up when I start VaraSAT. Looks like it does no request to acces the network. But I will focus at firewalls and virusscanners now…

  13. José Alberto Nieto Ros Says:

    maybe your antivirus have blocked TCP connections in VARA Sat

  14. Peter Knol Says:

    Yes. Vara Sat. I will reinstall the software. On a 2nd computer where the results the same. I did on both computers that ‘ virus check over rule ‘ thing. Map C:/VARA. I’ll try again…

  15. José Alberto Nieto Ros Says:

    Peter,

    have you installed VARA SAT?

  16. José Alberto Nieto Ros Says:

    Here it’s working perfectly. You have to check if the path is right

    73 Jose

  17. José Alberto Nieto Ros Says:

    Ok, after i will test it at home

  18. Peter Knol Says:

    I tried such befor. I tried port 8400. Did not work. I just tried 8320. Still no TCP connection. When I hit Connect I get the message ,VARA Chat is not connected with VARA modem, !

  19. José Alberto Nieto Ros Says:

    Then there is a conflict with TCP ports. Select 8320 port in both VARA SAT and VARA Chat. Then try again

  20. Peter Knol Says:

    Yes. In Chat i select Varasat. No TCP connection but modem starts o.k. Works fine when I select VaraHF modem. Then led TCP is green. PATH TO varaSat is ok, otherwise it wil not strar the modem…

  21. José Alberto Nieto Ros Says:

    Peter,
    In Vara Chat setup you have to select “vara sat”.

    73, jose
    Ea5hvk

  22. Peter Knol Says:

    Hello. I did install VaraSat but it does not comminicate with chat. When i sellect Vara HF it does work. VaraHF works via local loopback cable between 2 computers. It does not work via QO100. Timing problem ? But back to the top: Chat does start VaraSat, but that TCP led stays Red…

  23. José Alberto Nieto Ros Says:

    Yes, it’s my development. 73, Jose EA5HVK

  24. KarapuZ (@India_Papa_Golf) Says:

    Sorry, “razarabotki” = development!

  25. José Alberto Nieto Ros Says:

    what is razarabotki?

  26. KarapuZ (@India_Papa_Golf) Says:

    Question to the respected author and developer of VARA HF – Alberto, work on the frequencies of the QO-100 / Es’hail-2 satellite is marked
    modem, presumably in ARQ mode, with signal parameters: MFSK-48 (dF = 46.74 Hz V = 46.75 bps) and MFSK-24 (dF = 93.5 Hz V = 93.75 bps). My colleague and friend Cryptomaster published a material with signal analysis at the link:
    http://www.radioscanner.ru/forum/index.php?action=search&loc=1&forum=21&topic=36750&page=1442126
    Actually the question itself – do your razarabotki to this signal related?
       Regards and best wishes from Russia!
    Danila (KarapuZ).
    73!

  27. Mexican Amateur Radio Volunteers Provide Communication in Wildfire Response – Coast Emergency Communications Association Says:

    […] had been using Winlink but added the weak-signal software Vara HF, after José Alberto Nieto, EA5HVK, provided a Vara license on short notice. Tom […]

  28. The ARRL Letter for June 6, 2019 | Big Island ARRL News Says:

    […] had been using Winlink but added the weak-signal software Vara HF, after José Alberto Nieto, EA5HVK, provided a Vara license on short notice. Tom Whiteside, N5TW, […]

  29. Mexican Amateur Radio Volunteers Providing Communication in Wildfire Response - Town Of Islip ARES/RACES Says:

    […] had been using Winlink but added the weak-signal software Vara HF, after José Alberto Nieto, EA5HVK, provided a Vara license on short notice. Tom Whiteside, N5TW, […]

  30. Mexican Amateur Radio Volunteers Providing Communication in Wildfire Response Says:

    […] had been using Winlink but added the weak-signal software Vara HF, after José Alberto Nieto, EA5HVK, provided a Vara license on short notice. Tom Whiteside, N5TW, […]

  31. Mexican Amateur Radio Volunteers Providing Communication in Wildfire Response - Nerfd.net - RF News & Info Says:

    […] had been using Winlink but added the weak-signal software Vara HF, after José Alberto Nieto, EA5HVK, provided a Vara license on short notice. Tom Whiteside, N5TW, […]

  32. rafael manuel lorenzana ruz Says:

    thank you very much, for answering, sorry they know of some manual, for the program trimode, to activate the server

  33. José Alberto Nieto Ros Says:

    Hello Rafael,

    That was the very old version. Now VARA is integrated in Winlink. You can put a Gateway with Trimode software

    73 Jose
    ea5hvk

  34. rafael manuel lorenzana ruz Says:

    Greetings, with this version 2.2.1, as I can put it to be a gateway, to be a server.

    with the previous versions you only selected it, in this new version I no longer see this option.

    Thank you
    rafael
    xe3vk

  35. José Alberto Nieto Ros Says:

    Its a false positive Howard, dont worry. Add an exclussion to c:\vara folder

    73, jose
    Ea5hvk

  36. Howard Waxman WZ4K [AKQ] Says:

    I know this has been addressed but feel compelled to revisit the “false-positive”. I’m using SuperAntiSpyware and it gives a specific positive hit:
    Trojan.Agent/Gen-SmokeLoader.Process-2 – (Variant 332449)
    Trojan that may log user information and possibly block access to certain security related sites. Threat Level (1-10): 5

    Please advise, thank you, 73, Howard, WZ4K

  37. José Alberto Nieto Ros Says:

    Hello Warren,

    It’s a false positive

    Jose
    ea5hvk

  38. Warren Yursik Says:

    I downloaded the zip file VARA Modem v2.2.1 (High performance HF modem). McAfee halted the installation when it discovered a virus.

    Is this a fact or is it a false positive?

    73
    Warren

  39. José Alberto Nieto Ros Says:

    Hello Curtis,

    You need to do an exclusion to C:\VARA folder in Windows Defender.

    This quick guide explains how:
    https://mega.nz/#!TSR0RABa!pIrpYBMED3YHT5wTs8WgvtxMWJn3YNL_LPI5VGwiLAU

    73 Jose
    EA5HVK

  40. Curtis Price Says:

    I have downloaded and uncompressed the VARA HF files. Run the setup as an administrator. I finally was able to find the .exe file, however that file gets erased or deleted when it is opened. Any ideas? Running Win10 pro on a Surface and HP desktop same thing happens on both computers. RMS express is the latest version.
    Thanks.
    Curtis Price, K6IBP

  41. Rafael Muñoz Says:

    perfecto, gracias José Alberto¡

  42. José Alberto Nieto Ros Says:

    Apúntate al VARA google group. Ya se están haciendo pruebas con la versión de VARA FM: https://groups.google.com/forum/#!topic/varahfmodem/0Mcplhmr-Vw

  43. Rafael Muñoz Says:

    Intentaré hacer pruebas porque sería muy interesante reinventar un packet 2.0 mejorando con respecto al FSK 300bd.

    Por cierto con Winlink funciona perfectamente, enlaces con VE y USA desde EA sin ningún problemas y a velocidades razonables incluso con S/N negativo.

  44. José Alberto Nieto Ros Says:

    Hola Rafael,
    Supongo que sí que es posible, ya que lo que se hace al fin y al cabo es enviar información de A a B.

  45. Rafael Muñoz Says:

    ¿se podría utilizar este modem para construir una red packet radio con aplicaciones como ui-view o digipiater, etc??. Podría ser interesante por su eficiencia con niveles de baja S/R

  46. José Alberto Nieto Ros Says:

    Hello Rien,

    You need to download Winlink Express

    Jose

  47. Rien Aarden Says:

    Hello I’m brand New And Have download VARA but I’m realy do not know how to configurate the software .
    is there someone who can help me with this or is this only for Users that are pay for the software?
    I’m realy new with this and hope that I can try this mode with some help from someone!
    Tnx Rien, PA7RA

  48. José Alberto Nieto Ros Says:

    Hugh,
    It’s a false positive, not a virus
    Jose

  49. Hugh Wardlaw (@HEWscsi) Says:

    VARA does not work. It has a virus.

  50. José Alberto Nieto Ros Says:

    Yes, it is a modification

  51. KarapuZ (@India_Papa_Golf) Says:

    A question to the respected author is that in a frequency range of 40 meters there are 52-channel OFDM with Symbol Rate 41.6 bps in channels and a frequency shift of 46.8 Hz. Is this a modification of your VARA HF modem?
      Here is a link to this material:
    http://www.radioscanner.ru/forum/index.php?action=search&loc=1&forum=21&topic=36750&page=1370929

  52. José Alberto Nieto Ros Says:

    nietoros@hotmail.com

  53. Juhani Tuovinen Says:

    Hello José!

    We have tested the OH7TE OH5ZN test version of the VARA FM by getting through OH5RM, please send me your email address for the test results

    yufenau@gmail.com
    OH7TE “Yussi”

  54. José Alberto Nieto Ros Says:

    Mark,
    It’s a false positive

  55. Mark Carpenter Says:

    Windows Defender gave me the following message when I downloade, VARA 2.1.0 setup:

    Trojan:Win32/Fuerboos.C!cl

    Alert level: Severe
    Status: Quarantined
    Date: 3/24/2018

    Recommended action: Remove threat now.

    Category: Trojan
    Details: This program is dangerous and executes commands from an attacker.

  56. Winlink Express: ARDOP & VARA integrated – "What hath God wrought?" Says:

    […] there is a beta version of Winlink Express 1.5.11.1 which integrates the new Modes ARDOP and even VARA. There is also an update for the corresponding RMS Trimode software (the counterpart für RMS […]

  57. guillermo albizua Says:

    CP6GA
    Lo probe desde Bolivia y funciono en 20m via Bern. Conecto en la primera, excelente, ahora por lo visto no hay buenas condiciones y veo a la mayoria en 40 m pero no tengo antena para ello, Felicidades

  58. Carlos Gascón Saso Says:

    Gracias Alberto, he estado mirando de que se trata el sistema Winlink. Lo he puesto en modo automático y cada cierto tiempo emite la señal e intenta conectarse con la estación Gateway a ver si le voy cogiendo el truco. También he puesto un mensaje de prueba en la bandeja de salida del correo. A ver si se conecta y lo consigue enviar.

  59. José Alberto Nieto Ros Says:

    Hola Carlos. Para manejarlo primero tienes que estar familiarizado con el sistema Winlink. No se trata de un modo tipo QSO.

  60. Carlos Gascón Saso Says:

    Saludos a tod@s. He descargado el programa VARA y lo tengo ya instalado, pero hay unas cuantas cosas que no entiendo muy bien, a ver si me podéis explicar un poco.
    – Cliente y gateway
    – Hay que colocarse en alguna frecuencia específica como en Ópera o en Ros???
    – Etc…
    Si me podríais explicar un poco para poder empezar a manejarlo, aunque sea por encima para hacerme un poco a la idea de su funcionamiento.

  61. José Alberto Nieto Ros Says:

    it’s not my development. The commercial version of VARA is already in this site

    73!
    EA5HVK

  62. KarapuZ (@India_Papa_Golf) Says:

    I see very similar signals outside the amateur bands. But the OFDM segment of the modem has differences – 60 channels with a speed of 40 bps and a spacing of frequencies between them of 50 hertz. In this connection, the question for the respected author is – tell me, this is one of the versions of your modem, maybe commercial, or it’s just a coincidence and it’s not your development.
      The records of the 60 channel modem are available via the link:
    http://www.radioscanner.ru/files/unknown/file20219/
      73!
    KarapuZ

  63. Juhani Tuovinen Says:

    We test also 80 m here under aurora zone and bad selective fading -but working very well!
    Yussi OH7TE

  64. Juhani Tuovinen Says:

    VARA workin fb here in OH, v high speed connects.

    73 tu OH7TE Yussi

    >>>
    Sent 1 message. Bytes: 93437, Time: 07:30, bytes/minute: 12456

  65. José Alberto Nieto Ros Says:

    Así funciona la cosa Roberto, por eso dudé si subirlo a internet o dejarlo guardado en el disco duro.
    En Marzo me llega un toroide de ferrita y tendré operativa una estación EMCOMM en 30m con VARA. De momento lo tengo provisional en 10 metros.

  66. Roberto Sánchez Says:

    Gracias por tu trabajo, muy bueno por cierto.
    Ayer pude conectar a HB9AK y con niveles ridiculos estuvo enviandome la informacion, de 10 la robusted del protocolo.
    Lastima de no ser Norteamericano, seguro que ya habia cientos de personas usandolo 😉
    Un abrazo de EB1HHA

  67. IV3VJH Emanuele Says:

    Nice 👍

  68. Peter Martinsen Says:

    VARA 7050 for a few hours (Gateway) de OZ1PMX Peter

  69. José Alberto Nieto Ros Says:

    you are right, Luis

  70. Luís Garcia Filipe Says:

    Alberto, is a new moden for winlink, correct? 73 CT7AEL

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