V4
V4 is a sound card digital protocol optimized for keyboard operation over high frequency
amateur radio. It uses 4FSK modulation and strong FEC encoding with Viterbi decoding
for robustness even in weak signal or poor propagation conditions. V4 can be implemented
on most computers using standard PC sound cards with radio interfaces. Additional
information about V4 can be found on the Winlink web site.
The V4 protocol was developed by Rick Muething, KN6KB.
Registration
Registration provides you license to use the V4 virtual TNC with your callsign alone
or with any SSID (1-15) on multiple computers or multiple instances on the same
computer. This license is not transferable and can only be used with the callsign
originally used for registration. Complete license informaiton can be found in the
license.txt file included with V4. Consult the documentation for your particular
application for details on how to apply the V4 registration key.
Your registration donation helps fund further V4 development and other projects
sponsored by the Amateur Radio Safety Foundation.
The registration donation for V4 is $25.00.
Please enter your name and callsign below (being sure to
enter your Amateur, MARS, or UK Cadet callsign correctly as the registration key
applies to the entered callsign only). Then, press the
"Register Using PayPal" button to be transferred to the PayPal secure
web site where you can make your payment using your PayPal account or any major
credit card.
After your payment is complete be sure to return here to obtain your V4 registration
key. There will be a link on the final PayPal page that will bring you back if you
are not automatically redirected. If you have problems obtaining your registration
key send a message with your transaction details to v4@arsfi.org.
Important: Before completing this form be sure that your Internet
Service Provider (ISP), spam filter, and email program are configured to allow receipt
of email sent from v4@arsfi.org; otherwise you will not receive
the email message (containing your V4 registration key) which is sent automatically
when you complete your PayPal transaction. This message will be sent to the
email address that is associated with your PayPal account.
