[Ham-Mac] fldigi 4.1.18.16 posted

[w1hkj]

at http://www.w1hkj.com/alpha/fldigi/

  * fldigi-4.1.18.16.tar.gz
    <http://www.w1hkj.com/alpha/fldigi/fldigi-4.1.18.16.tar.gz>
  * fldigi-4.1.18.16_bs.dmg
    <http://www.w1hkj.com/alpha/fldigi/fldigi-4.1.18.16_bs.dmg>
  * fldigi-4.1.18.16_hs.dmg
    <http://www.w1hkj.com/alpha/fldigi/fldigi-4.1.18.16_hs.dmg>
  * fldigi-4.1.18.16_lion.dmg
    <http://www.w1hkj.com/alpha/fldigi/fldigi-4.1.18.16_lion.dmg>
  * fldigi-4.1.18.16_setup.exe
    <http://www.w1hkj.com/alpha/fldigi/fldigi-4.1.18.16_setup.exe>
  * readme.dmg.txt <http://www.w1hkj.com/alpha/fldigi/readme.dmg.txt>
  * readme.txt <http://www.w1hkj.com/alpha/fldigi/readme.txt>

Contains fixes to OFDM bugs reported for version 4.1.18.15.  Be sure 
that both Tx and Rx are using the same version for RsID to work corrrectly.

73, David, W1HKJ

Fri Mar 5 14:20:00 2021 -0600  - alpha  4.1.18.16

   WF-only mode menu
     * add missing modes

   Add OFDM modes for NBEMS - Author: John Phelps <kl4yfd at gmail.com>
     * OFDM-500F for HF SSB
       - survives HF NVIS/long path
       - 4-carriers of 62.5-baud 4PSK = 250 bps
       - 1/2 rate K=15 FEC with 4sec interleaver
     * OFDM-750F for HF SSB
       - survives HF NVIS/long path
       - 3-carriers of 125-baud 8PSK = 562 bps
       - 1/2 rate K=13 FEC with 3.2sec interleaver
     * OFDM-2000F for HF-SSB/FM
       - 8 carriers of 125-baud 8PSK = 2000bps
       - 2/3 rate K=13 FEC with 3.2sec interleaver
     * OFDM-2000 for HF-SSB/FM
       - 4 carriers of 250-baud 8PSK = 3000bps
       - NO FEC, meant for line-of-sight
     * OFDM-3500 for FM 9600-port
       - 7 carriers of 250-baud 8PSK = 5250bps
       - NO FEC, meant for line-of-sight
       - Requires Signalink made-after 2018 connected to the 9600-jack

   PSK-modes fix false triggers of DCD-OFF - Author: John Phelps 
<kl4yfd at gmail.com>
     * Certian character combinations were triggering DCD-OFF
     * DCD-OFF code now searches over 6-bit window
     * Prevents rare data-loss bug mid-transmission