New digital mode FT4

Discussion in 'Amateur Radio News' started by G4TUT, Apr 23, 2019.

ad: L-HROutlet
ad: l-rl
ad: Left-3
ad: L-MFJ
ad: Left-2
ad: DLSpec-1
ad: Subscribe
ad: MessiPaoloni-1
  1. G4TUT

    G4TUT Ham Member QRZ Page

    New digital mode FT4

    Joe Taylor K1JT has announced a new digital mode, FT4, which is 2.5 times faster than FT8

    FT4 is an experimental digital mode designed specifically for radio contesting. Like FT8, it uses fixed-length transmissions, structured messages with formats optimized for minimal QSOs, and strong forward error correction. T/R sequences are 6 seconds long, so FT4 is 2.5 × faster than FT8 and about the same speed as RTTY for radio contesting.

    FT4 can work with signals 10 dB weaker than needed for RTTY, while using much less bandwidth.

    FT4 message formats are the same as those in FT8 and encoded with the same (174,91) low-density parity check code. Transmissions last for 4.48 s, compared to 12.64 s for FT8. Modulation uses 4-tone frequency-shift keying at approximately 23.4 baud, with tones separated by the baud rate. The occupied bandwidth (that containing 99% of transmitted power) is 90 Hz

    Further information on FT4 is at
    http://physics.princeton.edu/pulsar/k1jt/FT4_Protocol.pdf



    http://www.southgatearc.org/news/2019/april/new-digital-mode-ft4.htm

    [​IMG]
    [​IMG]
    [​IMG]
     
    KN4PHS, KK4HPY, KE8EGE and 1 other person like this.
  2. WS4E

    WS4E Ham Member QRZ Page

    I am holding out for FT-2 myself.
     
    N3ZPC, K0IP, KN4PHS and 17 others like this.
  3. KC2YMO

    KC2YMO Ham Member QRZ Page

    Well, just think of it as one step closer to telepathy.
     
    N9NY, KC1JA, DL6BCX and 10 others like this.
  4. K7SKE

    K7SKE Ham Member QRZ Page

    Sweet, FT8 was getting alittle long in the tooth for me.....! 73!
     
    VE3DDF, KE0N and 2E0CQB like this.
  5. K9GLS

    K9GLS Ham Member QRZ Page

    2.5 times FASTER!?!?!? Now I can contact all 50 states in (running calculator) in 23 minutes! WOOHOOO!
     
    N9NY, NP4PC, N3ZPC and 9 others like this.
  6. K8SQB

    K8SQB Ham Member QRZ Page

    Cue: FT4 will ruin Amateur Radio.

    I for one welcome our new FT4 overlords.
     
    K7SKE, UT7UX, AJ4LN and 9 others like this.
  7. NH7RO

    NH7RO Ham Member QRZ Page

    Someone please wake me when they get to FT-0...
     
    N3ZPC, DL6BCX, UT7UX and 11 others like this.
  8. VA7WPN

    VA7WPN Ham Member QRZ Page

    The way I see it... the more modes there is the more options you have.. BUT... the bigger the chance you will miss that QSO because your not using the right mode. Soon, EVERYONE will have their own mode.. and no one else will use it... and communication will stop... well.. QRZ.com will be where everyone complains about it. To each ... I guess.
     
    N0YPD, N0NC, KD5COL and 7 others like this.
  9. KC2YMO

    KC2YMO Ham Member QRZ Page

    Crossmoding anyone?
     
    AF4KK likes this.
  10. W4EAE

    W4EAE Subscriber QRZ Page

    I guess I was watch lead paint dry...

    Now I can watch acrylic paint dry.

    Everyone has their hobbies.:)
     
    G8JXV, NU4R, VK6APZ and 9 others like this.

Share This Page