1. New England Division Convention Boxborough, MA September 6, 2019
Narrow Band Emergency Messaging System
(NBEMS)
For
Emergency Radio Communications
George Blakeslee N1GB

2. Agenda Overview Digital Communication 4-Part Presentation (1 hour @)
Winlink RF/internet
NBEMS FLDIGI
NBEMS FLMSG & FLAMP
Advanced Topics, Hints, Kinks

3. What is NBEMS Narrow Band Emergency Messaging System
Consists of program suite:
Fldigi – Fast Light Digital modem application
Flwrap – Wrap a file with a checksum
Flmsg – easily send ICS forms and Radiogram
Flamp – sends files in blocks
Can download from or
Runs on Windows, Linux, and Mac.
Released under GNU Public License, so it is completely FREE.

4. What is NBEMS Prerequisites for NBEMS Operations:
FLDIGI, FLWRAP, FLMSG and FLAMP downloaded and installed
A basic understanding of your computer Operating System (OS)
Ability to create file folders and move files 4

5. What is NBEMS Download and Install FLDIGI, FLWRAP, FLMSG and FLAMPor 5

6. SET UP EQUIPMENT
Connect the interface and computer to the radio

7. What is fldigi
Fldigi is a computer program intended for Amateur Radio Digital Modes operation using a Personal Computer.
Fldigi operates in conjunction with a conventional HF/VHF/UHF radio transceiver, and uses a sound card as the main means of input from, and output to, the radio. These are audio-frequency signals. It can also control the radio by means of another connection, typically a serial port.
Fldigi is multi-mode, which means that it is able to operate many popular digital modes without switching programs

8. Live demo fldigi exchanges

9. Configure FLdigi
Double click on your FLdigi icon 9

10. Configure FLdigi
Optional Configuration Wizard 10

11. Configure FLdigi
Operator Info 11

12. Configure FLdigi
Audio Device 12

13. Configure FLdigi
Rig Control 13

14. Configure FLdigi
Operating Display 14

15. Configure FLdigi
UI – User Interface 15

16. Configure FLdigi
Waterfall 16

17. Configure FLdigi
RxID 17

18. Configure FLdigi
Misc - NBEMS: FLmsg auto-unwrap 18

19. Configure FLdigi
Misc - NBEMS: FLmsg auto-unwrap 19

20. Configure FLdigi
Misc - NBEMS: FLmsg auto-unwrap 20

21. Configure FLdigi
Misc - ‘Sweet Spot’ 21

22. Configure FLdigi
Autostart 22

23. Configure FLdigi
IO – Enable ARQ 23

24. Fldigi operation
Modes 24

25. Fldigi operation Modes Mode WPM BW (Hz) Primary Use(s)
PSK HF/VHF ‘live’ keyboard *
PSK 4x125R HF/VHF file transfer mode
PSK 3x250R HF/VHF file transfer mode *
PSK 5x250R VHF file transfer mode
Olivia 8/ HF keyboard mode
MT HF file transfer mode
MT VHF file transfer mode
Thor1x HF Keyboard mode *
* NH Digital Net & HARP 25

26. Configure FLdigi
Modem - Thor 26

27. Configure FLdigi
Modem – MT63 27

28. Configure FLdigi
Modem - Olivia 28

29. Fldigi operation
Macros 29

30. Fldigi operation
Macros 30