Icom IC-M802 Manual de usuario

Quick Reference Guide

“Quick Reference Guide for IC-M802

Digital Messaging” by Cdr. Terry L. Sparks

iM802

HF Marine Transceiver

Information on purchasing, installing and/or operating

Icom’s HF Marine Transceiver is featured in “Icom IC M802

Starting from Scratch “ and “Icom IC M802 Made Simple for

Crusisers” volumes from Commander Terry L. Sparks.

Visit Made Simple for Cruisers online at

www.made-simplefor-cruisers.com

Digital Communications - Made Simple for Cruisers

www.made-simplefor-cruisers.com Published: 7/10/12

Overview

There are times when you just cannot talk to a fellow cruiser via voice. With voice we are

trying to understand the words and inflections of the calling station and high levels of

background noise levels can be very challenging.

When you need to get your message out or find out what the weather is going to be, the best

alternative to voice communications is digital communications. Digital has a better chance

than voice as it is really only looking for ones and zeros in a known format.

Most people are familiar with text messaging on your phone, but did you know that if you use

Sailmail or Winlink you have the tools on board to basically text a fellow cruiser. The process is

very simple with only a couple of added things to do to change from listening to sending. This

procedure assumes your radio, modem, and Airmail are already set up for use on Sailmail

and/or Winlink. While you could use any Dumb Terminal, let keep it simple and use Airmail.

The Process

1. Both the sending and receiving stations must be ready to receive messages.

2. Turn on your radio, Computer, and PACTOR modem.

3. Set the frequency to the desired frequency you are authorized to transmit on.

4. Start the Airmail program

a. The program you use to do Sailmail and/or Winlink.

b. Start just like if you were getting ready to send and receive email.

5. Using your computer’s mouse device,

click on “Tools” and then “Dumb

Terminal”.

a. This will open a window similar

to the window you use for

Sailmail and/or Winlink.

6. There will be no green start or red stop

button.

7. Press “Esc” key to get the Command

prompt, “cmd:”

Airmail - Dumb Terminal Display

Digital Communications - Made Simple for Cruisers

www.made-simplefor-cruisers.com Published: 7/10/12

8. Next start the digital text process communications with the modem. All station(s)

wanting to hear and/or send digital

information must initiate the process by:

a. Type “Listen 1” and press “Enter”.

b. Your computer may return with “***

LISTEN-MODE: 1” depending on where

the modem was last set.

c. Your modem is now listening.

d. You will now hear any PACTOR

modems sending messages on the

selected frequency.

e. Press “Esc” key to return to the “cmd:”

prompt.

9. To Send text to all stations in the listening

mode:

a. Type “UN” and press “Enter”.

i. This is the abbreviated version

of the UNPRO Command.

b. The computer should display

“UNPROTO TRANSMISSION ACTIVE -

MODE 1: FSK 100 BD >>”

c. The computer display will move to a blank line ready for typing.

d. Type your message(s)

10. I would suggest starting your message with your call sign and end it with your call sign if

your message is more than 10 lines.

a. Example:

Send a Short Message

XF1-AD7XL: Now is the time for all good

men to come to the aid of their

Party and that Party is at Geary’s house on

the 4th of July.

Digital Communications - Made Simple for Cruisers

www.made-simplefor-cruisers.com Published: 7/10/12

For Long messages

XF1-AD7XL: Now is the time for all good men to come to the aid of their

Party and that Party is at Geary’s house on the 4th of July.

For directions of where to go . . . . . . . . . . . . etc.

and What to bring . . . . . . . . . . etc.

And on another subject . . . . . . . etc.

Kind Regards, Terry: XF1-AD7XL

11. When you have completed sending, press and hold “Ctrl” and Press “d” to stop

transmitting.

12. Press “Esc”to return to the “cmd:”prompt.

13. It is also possible to do a hard stop on the

transmitter as an option. To do a hard stop

press “Esc”and then type “DD”and Press

“Enter”. The Modem will return to the listen

mode and display the “cmd:”prompt. (as an

old CPM computer guy, I like the “Cntrl”“d”

option best.)

14. Then press “Esc” to return to the “cmd:”

prompt.

15. When complete, close the terminal window by busing your Mouse Device and clicking

on the red “X” in the upper right corner of the Dumb Terminal.

Digital Communications will allow us cruisers to get information more accurately and at a

longer distance. Most importantly being able to ask those weather questions will increase

cruiser overall Safety at Sea.[See “Quick Reference Guide”on the next page.]

Digital Communications - Made Simple for Cruisers

www.made-simplefor-cruisers.com Published: 7/10/12

Receive a messages (Always do first):

1. Turn the Radio, Modem and PC on.

2. Make sure the equipment is connected as it would be connected for Sailmail or Winlink.

3. Start Airmail Program

4. Tune the radio to the frequency you intend to transmit and receive on.

5. With your mouse, click on “Tools” and then “Dumb Terminal”.

6. Press “Esc” to see “cmd:” prompt

7. Type “Listen 1” and press “Enter”.

8. Your computer may display “*** LISTEN-MODE: 1” indicating you are in fact in the

listening mode.”

9. You are now listening for messages from anyone.

Send a messages:

1. At the “cmd:” prompt type “UN” and press “Enter”.

2. The transmitter will key on the selected frequency.

3. Type your message and press “Enter” at the end of each line.

4. Start your message with your call sign and end it with your call sign if it is a long

message.

XF1-AD7XL: Now is the time for all good men to come to the aid of their

party and that party is at Geary’s house on the 4th of July for all Cruisers.

(Press “Enter” for next line)

5. After sending your message, press and hold “Ctrl” and then press “d” to stop

transmitting.

6. Then press “Esc” to return to the “cmd:” prompt.

7. Close the terminal window by busing your Mouse Device and clicking on the red

bordered “X” in the upper right corner of the Dumb Terminal.

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