Advanced Digital Modes:M110A Digital Modem

Terminal & Army TerminalSoftware

Ken Heitner AFA3PB / AFD3AL

David Maples AFA3WZ / AFF3VA

NE Division Conference

September 2015

Why Digital Messaging?

• Allows Emergency Traffic to be Handled Quickly and Automatically

• Works with Existing E-mail Systems when They are Available

• Has Potential to Interface with Military Stations

• Messaging Mode is Familiar to Most Users• Can Effectively Utilize Available HF

Channels

What is Needed Here?

• Start with Standard Personal Computer components:– Soundcards, and– USB or Serial (COM) Ports

• All Critical Features are Built into M110A Digital Modem Terminal (as software)

• Additional Features in Army Automated Message Terminal

• These are Linked by Virtual COM Ports

M110A Digital Modem Terminal• Meets MIL-STD 141-110A Requirements

• Phase Shift Digital Modulation & Demodulation

• Digital Signal Processing (DSP)

• Forward Error Correction (FEC), and

• Radio Tuning Errors

• Works with Most Sound Devices

• Available:http://groups.yahoo.com/group/MARS-ALE/

Army Automated Message Terminal

• Most Critical Functions of Digital Message Transfer are Handled in Software

• Operator Sets or Selects:– Message Format (Standard types)– Transmission Baud Rate (depends on link)– Transmission frequency and choice of antenna

• Received Messages are saved automatically as files

• Available: http://amtog.org/amt/

Software Package Linkage• M110A DMT and Army Automatic

Terminal must be LINKED!!• This is done by Virtual COM Ports• There are various packages that work:• Recommend: Virtual Serial Port Manager

by K5SR – Very easy to use• Create at least one serial port pair to form

required link• Available:http://k5fr.com/ddutilwiki/

index.php?title=VSPM

M110A Digital Message Term.

Army Automated Message Terminal

What Does It Look Like?Virtual Serial Port Manager

What Does the Future Hold?• The MIL-STD 141-110A Modem is part of

the standards for ALE Radios• Military ALE Radios may have this Modem

as part of the hardware• The MARS-ALE software already has the

MIL-STD 141-110A modem built in.• This offers the capability to automatically

transfer messages to the destination radio• Future decisions will affect what happens

with in AF MARS

For Additional Information• Contact Ken AFD3AL

– E-mail to: kenheitner@hotmail.com– WL2K Message to: AFA3PB– TPN Message to: AFA3PB@AFE3MC– Phone: 703-538-4747Phone: 703-538-4747

• Join The Digital Revolution in MARS Today !!!

• You Might Just Learn Something New !!

And What About the Other Digital Modes & Nets??

• TRR 1&2 –10AM & 7 PM EDT – MFSK16• TPN – Pactor 1,2,&3 – TPB, TPE, TPG,

TPM – AFB2MC, AFC2MC, AFE3MC, AFC4MC are active BBSs

• WinLink 2000 MARS -RMS Express:– Available from: http://www.winlink.org/-Setup Uses MARS Service Code (See me!)

• ALE in Transition to work with Army