*****************************************************************************
*  Help File for WeatherFAX Program
*  Copyright 1990 Jerry Dahl, 6404 Lakerest Court, Raleigh, N.C., 27612
*
*  NOTES:
*  - file must be named 'FAX.HLP'
*  - WeatherFAX program searches for help file on the default drive and path
*
*  IBM and PS/2 are trademarks of International Business Machines Corp
*****************************************************************************
%10,4,5,17,60,HELP: Index
Press a function key for more information:

   F1  Help index  (This panel)
	 - How to get help
   F2  Getting started
	 - Installing the card
	 - Setup software
   F3  General information
	 - Introduction
	 - Command-line parameters
   F4  Displaying an image
   F5  Test/calibration of the fax adapter
   F6  In case of difficulty
   F7  Facsimile broadcasts
   F8  RTTY broadcasts

───────────────────────────────────────────────────────
How to Get Help

Help information is available anytime you see F1=Help
displayed on the screen. You can access Help by pressing
the F1 key on your keyboard. You can quit viewing Help
by pressing the Esc key on your keyboard.

Selecting

The menus allow you to set parameters and select various
actions. Use the up and down arrow keys to move the cursor
to the item you want to select, then press the Enter
(─┘) key. To set parameters you either type in the
value or select the desired choice from a list of choices.

%11,4,5,17,65,HELP: Getting Started
1. Install the fax adapter.

    The card can be installed in any IBM PC, PS/2 Model
    25/30 or compatible computer that uses the standard
    PC bus architecture.

    Refer to the Guide to Operations for your computer for
    instructions for installing adapters. You will need to
    remove the cover from the computer to insert the fax adapter
    into an unused adapter socket.

2. Setup Program

    A) Copy the Diskette.

       Copy the WeatherFAX diskette and save the original
       diskette in a safe place. You can copy the diskette
       to either a hard disk or to another diskette.  Refer
       to your DOS manual for instructions for copying
       diskettes.

       NOTE FOR USERS USING THE IBM CGA DISPLAY ADAPTER.

       (Note does not apply if you are using a PS/2 computer
       or a VGA or EGA Display adapter).
       The CGA adapter ROM does not include the entire graphics
       character set.  You need to load the DOS graphics
       character set driver GRAPHICS.COM into memory.
       The driver is available on your DOS diskette. An entry
       can be added to your AUTOEXEC.BAT file to load this
       driver every time you start your PC.
       Example:   C:\DOS\GRAPHICS.COM

    B) Test Fax Adapter

       Test the fax adapter by using the Test option on the
       Main Menu. The various tests will indicate whether the
       adapter is operating within its correct operating
       region.

    C) Connect the adapter to your Fax Receiver

       Use a two wire cable to attach the fax adapter to your
       fax receiver. The cable should have a standard 3.5mm
       phone plug on the end that plugs into the adapter.
       Plug the cable into either the receiver earphone jack
       or fax output jack.

    D) Specify Hardware

       Go to the fax menu to specify the Display Mode and
       Printer type.

    E) Capture Image to Computer Memory

       Set fax parameters and select the Acquire fax action.
       The program will automatically capture the next image
       into the computer storage. If the first image is
       slanted then the page alignment needs to be adjusted.
       Once adjusted the page alignment should never need to
       be changed again. Alignment is done while an image is
       being acquired. Refer to the help panel for acquire
       image to buffer.

    F) Enhance and Save Image

       After an image is received you can then use the various
       enhancement options and then save the image to the
       printer or disk.

%12,4,5,17,60,HELP: General Information
Introduction:

This scan converter and software can be used with
your IBM or compatible personal computer.  With the
proper receiving equipment and antenna, your computer
will be able to capture, enhance, save and print.
Not just black and white but gray-scale weather-
facsimile images received on the HF, VHF and UHF bands.
Users of this Automatic Picture Transmission (APT) imagery
include military and commercial meteorologists, ships
at sea, scientific observers, educators, and amateurs.

See "A Weather-Facsimile Package for the IBM PC-Part I,"
QST Magazine, April pp 15-24 and Part 2, May 1990.

   ╔═══════╗
   ║Display║
   ║	   ║
   ╚═══════╝			    ┌──────────┐
  ┌─────────┐			    │ Weather  │
  │ Computer│	 phono cable	    │ Facsimile│
  │	    │-----------------------│ Receiver │
  └─────────┘			    └──────────┘

The scan converter can be installed in any IBM PC, PS/2
Model 25/30 or compatible computer that uses the standard
PC bus architecture.

System features

  o Direct APT weather satellite imagery.
    Capture GOES APT/WEFAX, NOAA 9/10 APT IR/Vis,
    Soviet METEOR, METEOSAT, HF-FM NAFAX, and similar
    APT formats.

  o Image capture can be fully or partially automatic,
    including APT start tone detect, header skip, sync,
    image save to disk, APT stop tone detect, and cycle
    repeat.

  o Expanded memory support.  The size of the captured
    image is limited only by the amout of RAM in your
    computer.

  o All standard graphics cards supported including
    CGA, EGA, MCGA, VGA and extended 800 x 600 resolution.

  o Histograms, enhancement, zoom, scroll, gray scale,
    256,000+ colors, real-time acquisition/display.
    4 user settable imagery enhancement curves.

  o Print images with 16-level gray scale on a wide variety
    of printers including 9- and 24-pin dot-matrix printers
    and laser printers.

  o Images saved on disk with standard TIFF and GIF formats
    allows pictures to be used by other software.

  o Self test mode verifies proper operation of the fax
    adapter.

Command line parameters
  ┌─────────────────────────────────────────────────────┐
  │  Syntax: FAX [options]				│
  │	 Where options are:				│
  │							│
  │  /E     = Use Expanded (EMS) memory if installed.	│
  │	      Requires LIM 4.0 driver.			│
  │  /C     = Use conventional memory.			│
  │  /A     = Go into acquire mode			│
  │  /Ffile = Go into acquire mode, save next image to	│
  │	      disk with the given file specification,	│
  │	      then exit to DOS. 			│
  │  /Hxx   = BIOS display mode for 800x600 resolution	│
  │	      mode.  See help screen for graphics mode. │
  └─────────────────────────────────────────────────────┘
   NOTE: Program will automatically use EMS memory if
	 available EMS memory is greater than conventional
	 memory.

  Examples:   C:>FAX /FC:NEWFILE.TIF
	      Image will be saved to file C:NEWFILE.TIF

	      C:>C:>FAX /H54
	      Enable 800 x 600 pel resolution mode
	      for ATI VGAWonder compatible card.
	      See help screen for other cards.

%13,4,5,17,60,HELP: Displaying an Image
When viewing the image you can enhance the detail in
several ways:

Display Mode

    You can view the image with different display modes to
    change the resolution and palette range.  Change the
    display mode using the Setup Menu.

    Example:
    VGA mode has high resolution (640 x 480) so most or all
    of the image may be displayed.  However only 16 colors
    (or grayshades) are viewable at a time.

    However, by selecting MCGA mode with a lower resolution
    (320 x 200), small details of interest in the image may
    be more easily seen and you can highlight details with
    64 grayshades.  Also with 50 percent zoom you can see
    almost the same area as VGA mode but with 64 grayshades.

The cursor keys will normally allow you to scroll the
image window up, down, right, and left.  Also you can
press the Alt key and either the F1, F2, F3, or F4
keys to select one of the four color look up tables.

    ┌────────────────────────────────────────────────┐
    │  In Scroll Mode the active keys are:	     │
    │						     │
    │  cursor keys:    scroll up, down, right, left  │
    │  Home	       go to top of image	     │
    │  End	       go to bottom of image	     │
    │  F1	       help (this screen)	     │
    │  Esc	       - return from help	     │
    │		       - abort when writing screen   │
    │			- return to last screen      │
    │  Alt/F1..F4     Select color table	     │
    │						     │
    └────────────────────────────────────────────────┘

    If you press the space bar while viewing the image an
    action line will appear.  Use the cursor keys to chose
    a selection and then press the Enter key.  The
    different image enhancement selections are described
    below.  Press the Esc key to return to scroll mode.

Palette

    You can change the colors and gray scales of the image
    by changing the loop-up tables (LUT) that define the
    way the image is displayed. With VGA, EGA, and MCGA
    4 tables can be defined.  For each table you can adjust
    the Red, Green, and Blue colors separately.  The table
    number is displayed at the top of the panel.  While
    the image is displayed you can change to a different
    table at any time by pressing the Alt key and either
    F1, F2, F3, or F4.

Enhancement

    You can change the contrast and brightness if the image
    was captured with pels per byte = 1.  The histogram
    displays a chart of the distribution of shades of the
    displayed window and can be used as a visual aid to
    help adjust the image brightness and contrast.  For
    Brightness, the right cursor key makes the image
    darker. For Contrast, the right cursor key increases
    the contrast.  See FAXGUIDE.DOC for more detailed
    information on using these adjustments.

    When you exit the window with the Esc key the display
    is redrawn with the new Brightness and Contrast values.
    These values are also used for printing the image.

Zoom (and Negative and Rotate)

    Zoom.  You can select Zoom of 50, 100, 200, and 400
    percent.  50 percent is useful for shrinking the image
    to half size to display more of it at one time.  200
    and 400 percent zoom is useful to enlarge the image to
    better display small details of interest.

    Negative.  You can display both the positive and
    negative view of the image.  The negative view displays
    the image similar to a photographic negative.

    Rotate.  Rotate turns the picture upside down for
    viewing.  This is useful for viewing images from
    descending-node (North to South track) polar-orbiting
    satellites that send images upside down.

Print

    Before printing for the first time:
    - Select your printer type on the Setup Menu.
    - Set the desired print gray scaling on the Print Menu.

    With this option the displayed portion of the image is
    printed.  If the screen is Zoomed then the printing
    will be scaled accordingly.

    NOTE: For 200 or 400 percent the printing is enlarged
    by automatically setting a greater printer gray scale
    (e.g., print mode 2x2 would be changed to 4x4). If the
    print mode is already set to 4x4 then the printed image
    cannot be enlarged further.

    If you want to print the entire image then align the
    top and left corner of the image to be printed then
    exit back to the Print Menu.  You can now set the
    desired print gray scaling and print either the screen
    or the entire image starting from the top left corner.

%14,4,5,17,60,HELP: Fax Adapter Calibration
WeatherFAX card physical layout

 ╔════▌█══════▌█═══════════▌█═════════▌█═══════╗
 ║  ┌─██─┐  ┌─██─┐	 ┌─██─┐     ┌─██─┐     ║╔═══
 ║  │POT2│  │POT4│	 │POT3│     │POT1│     ║║
 ║  └────┘  └────┘	 └────┘     └────┘     ║║
 ║   Stop    Start	   AM	      FM       ║║
 ║ Detector  Detector	Demodulator  Demod. █████▌<─┐
 ║  450 Hz   300 Hz	 2400 Hz    1800 Hz █████▌ phono
 ║					       ║║  jack
 ║					       ║║
 ║					       ║║
 ║					       ║║
 ║					       ║║
 ║					       ║║
 ║					       ║║
 ╚═════════╗				   ╔═══╝║
	   ╚▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌▌╝	║

Calibration procedure

Calibration is needed if any of the Self-Tests indicate
that the adapter is operating out of the indicated
operating range. The self tests will indicate which
parameter is out of range and needs adjustment.

Instructions are provided below for making the adjustment.
The procedure is simple and can be performed without
special tools or knowledge. Because adjustments are made
while the computer is powered on it is recommended that
the adjustment be done by a qualified service technician.

A non-metallic screwdriver should be used for the
adjustment. This will prevent damage to the computer if
the screwdriver should accidentally be dropped into the
computer.

1) Turn power to the computer off.
2) Remove the cover of the computer. Refer to the Guide
   to Operations for your computer for instructions for
   removing the cover.
3) Locate the fax adapter.
4) Turn computer power on and start the WeatherFAX program.
5) Select Test Adapter, and then Static Test.
   Adjust the potentiometers for the parameter out of
   range. When you are finished all parameters should be in
   the 'OK' region.
6) The final adjustment for the FM demodulator should be
   done while viewing the FM Graph Test. The line should be
   linear, sloping upward with time, and centered between
   0 and 256. If not centered adjust the FM potentiometer
   while viewing the Graph.

%15,4,5,17,65,HELP: In Case of Difficulty
SYMPTOM       SOLUTION
───────────── ────────────────────────────────────────

NO PICTURE    1) Run fax adapter tests to assure that the
		 adapter is operating within the correct
		 range.
	      2) Verify that Adapter Mode is set correctly
		 for the facsimile signal.
	      3) For Marine fax mode verify that the receiver
		 signal level is within the range of the fax
		 adapter attenuation pads. If the signal level
		 is very weak then decrease the attenuation
		 pads using F4 on the adapter mode menu.
	      4) Is the fax receiver powered on and the cable
		  connected to the fax adapter?

DISTORTED     1) Verify that the Adapter Mode is set correctly
PICTURE 	 for the received signal. (e.g., if the image is
		 WEFAX then the Adapter Mode must be set to AM.
	      2) Verify that Scans per minute is set correctly
		 for the received signal.
	      3) If the image is slanted then the Page
		 Alignment needs to be adjusted while an image
		 is received.
	      4) For FM Marine fax verify that the receiver is
		 tuned correctly. Marine fax images are
		 usually transmitted using Upper Side Band
		 (USB). The receiver must be tuned
		 approximately 1700 Hz lower then the center
		 frequency.

		 Example: For a 8080 KHz HF fax signal, the
		 receiver should be tuned to 8078.3 KHz.
		 (8080 KHz - 1.7 KHz = 8078.3 KHz).
		 Vary the frequency slightly to get the best
		 picture.
	      5) Check your AUTOEXEC.BAT file to remove any
		 terminate-stay-resident (TSR) programs.  Some
		 TSR programs interfer with the proper operation
		 of the fax software.

EXPANDED      Be sure that the Expanded memory device driver
MEMORY NOT    (LIM 4.0) is loaded into memory.
RECOGNIZED:
	      If you have an 80386-type computer then
	      the EXTended memory can emulate LIM 4.0
	      EXPanded memory using a device driver shipped
	      with DOS 4.0.

	      The EXTended memory on 80286-type computers cannot
	      emulate EXPanded memory.	You must use an actual
	      LIM 4.0 capable memory card.

	      EMS Simulators using either a hard disk or
	      EXTended memory are not supported because of the
	      'data aliasing' problem that is inherent with
	      simulators.

800x600       1) Verify your graphics card supports this mode.
DISPLAY       2) Verify that you have a multi-frequency monitor
MODE		 that supports 800x600 resolution.
DOESN'T       3) Verify you have set the correct BIOS display
WORK		 mode.	See the Help Screen for Graphics Mode
		 to find the correct mode for your type of card.
	      4) Verify that the correct mode is listed as a
		 command line parameter.  See the Help Screen
		 for Graphics Mode.

%16,4,5,17,60,HELP: Facsimile Broadcasts
Radiofacsimile Sources

Marine Weather Radiofacsimile can be received direct from
government radio transmissions. There are over 65
transmitter sites worldwide which utilize over 200
different radio frequencies. The information that is
broadcast includes weather analysis charts, satellite
pictures, and radar charts. These radio signals are
received on short wave radio frequencies (e.g., 8080 kHz) on
Upper Sideband.  Set FM mode and 120 Scans per Minute
for capturing these images.

Weather satellites.

There are two types of operational satellites,
Geostationary and Polar-orbiting spacecraft.

Geostationary satellites include U.S. GOES, European
METEOSAT, and Japanese GMS. These spacecraft transmit
WEFAX format images on S-Band frequencies (e.g., 1691 MHz).
Set for AM mode and 240 Scans per Minute.

Polar-orbiting satellites include U.S. TIROS/NOAA
and Soviet METEOR. These spacecraft transmit on
VHF frequencies (e.g., 137.5 MHz). Set for
AM mode and 120 Scans per Minute.

%17,4,5,12,60,HELP: RTTY Broadcasts
Many weather radiofacsimile transmitters broadcast
radioteletype messages in addition to charts and
images.  These are usually transmitted at 100 wpm
with normal sense and 750 Hz wide shift.

WeatherFAX allows you to receive these RTTY
broadcasts with standard Baudot speeds from 60 to 133
words per minute. You can also select either normal or
reverse sense. Reception is in FM mode. You can save
the RTTY to both a printer and disk file.

NOTE: This product is not suitable for general purpose
Amateur radio RTTY decoding. It has limited performance
in noisy environments and with narrow shifts.  It is
primarily intended to decode RTTY from HF fax stations
that broadcast both RTTY and fax.

%18,4,5,3,30,HELP: F9 Key pressed
No help available

%19,4,5,3,30,HELP: F10 Key pressed
No help available

%100,4,5,12,65,HELP: Main Menu
This menu provides access to all WeatherFAX functions:

FAX  . . . . . . Capture, store, view, and print an image.

RTTY . . . . . . Receive, store, and print Baudot using
		   standard speeds, shifts, and sense.

Test Adapter . . Test adapter for correct operation.

Exit to DOS  . . Terminate program and exit to DOS.

%110,4,5,17,70,HELP: Fax Menu
The main screen displays information about the image stored
in computer memory.

Lines  . . . . . . .	Number of image lines
Pels per line  . . .	Image samples taken per image line
Pels per byte  . . .	Number of samples stored per byte
Bytes  . . . . . . .	Amount of storage used to store the image.
Buffer used  . . . .	The arrow points to the type of buffer used:
			Conventional Memory; or Expanded Memory.
			WeatherFAX will use whichever type that
			is larger.

You can select various fax functions:

ACQUIRE     Allows you to capture a weather facsimile image from
	      the fax receiver into the computer memory.
	      GOES (WEFAX), polar orbiting NOAA, and Marine fax
	      images can be acquired.  Various receive options can
	      be selected. You must have a fax adapter installed in
	      your computer and your fax receiver must be attached
	      to the adapter with a cable.

FILE	      You can either:
	      - Retrieve an image from disk into memory.
	      - Save image from memory to disk.
	      - Erase a file from the disk.

PRINT       You can print the image with selectable gray scaling.
	      You can print either the entire image or just the
	      displayed portion.  Several half-toning (dithering)
	      methods can be selected

VIEW	      You can view the image with selectable display
	      resolutions.  You can scroll, adjust the contrast,
	      change the colors, and zoom.  For more information
	      go to the HELP INDEX and select Displaying an Image.

SETUP       You can select the graphics display mode and printer
	      setup information.

	      You can easily change from one display mode to another
	      to view the image with different color palettes and
	      resolutions.

	      Select the printer type that that your printer is
	      compatible with.	You can print the image to a printer
	      connected to either your computer's printer port or to
	      a DOS device name.  The device name could be a file
	      name or the name of a printer attached to a Local Area
	      Network.

%120,4,5,17,70,HELP: File
You can either:

Retrieve    an image from disk into memory.  You can retrieve
	      and display image files that are created by other
	      software packages if they are stored with either
	      the GIF or TIFF file formats.

	      NOTE: If you should get the error message "Drive not
	      ready" when retrieving very large files (1 MB or
	      larger) the reason may be not enough DOS disk buffers
	      that your computer requires.  Try increasing the number
	      of buffers by adding the following line to your DOS
	      CONFIG.SYS file.	BUFFERS = 24 

Save	      image from memory to disk. You can save either:
	      1) the part of the image that is displayed.
	      2) the image starting from the top left corner
		 displayed on the screen. This feature allows you
		 to "crop" the top and align the left edge of the
		 image.  Before you save to disk be sure view the
		 image using the cursor keys.  The image will be
		 saved starting at the top left cornor on the screen.

	      Files are saved using the standard Tag Image File
	      Format (TIFF) or Graphics Interchange Format (GIF)
	      which allow the files to be used by many other software
	      programs.

Erase       a file from the disk.

%130,4,5, 5,45,HELP: Exit
You can either:
Resume and continue using the program or
Exit to DOS

%141,4,5,17,60,HELP: Graphics Mode
Select one of the display modes for viewing the image.
Only the modes available for your computer can be selected.
You can switch between modes to display the image with
different colors and resolutions. The different display
modes are listed below:

┌────────┬───────────┬────────┬────────┐
│ Mode	 │ Resolution│ Colors │ BIOS(2)│
├────────┼───────────┼────────┼────────┤
│ CGA    │ 320x200   │   4	│  H04	 │
│ CGA_H  │ 640x200   │   2	│  H06	 │
├────────┼───────────┼────────┼────────┤
│ EGA    │ 320x200   │  16	│  H0D	 │
│ EGA_H  │ 640x350   │  16	│  H10	 │
├────────┼───────────┼────────┼────────┤
│ MCGA   │ 320x200   │ 256 (1)│  H13	 │
│ MCGA_H │ 640x480   │   2	│  H11	 │
├────────┼───────────┼────────┼────────┤
│ VGA    │ 640x480   │  16 (1)│  H12	 │
├────────┼───────────┼────────┼────────┤
│ Note 3 │ 800x600   │	16    │        │
├────────┼───────────┼────────┼────────┤
│ 8514   │ 1024x768  │  16 (4)│ (4)	 │
└────────┴───────────┴────────┴────────┘

NOTES:
  1) Colors are selectable from palette of over
     256,000 colors that includes 64 gray scales.

  2) BIOS mode is the graphics mode for the display
     adapter.  It is listed here for information
     purposes only.

  3) 800x600 mode requires a graphics card that
     supports this mode and a multi-frequency monitor.
     Because different cards use different modes
     you must specify the BIOS display mode on the
     command line parameter '/Hxx' where xx is the
     mode.

     For example: the ATI VGAWonder card uses
     mode 54 to display 800 by 600 with 16 colors.
     Start the program with: C:>FAX.EXE /H54

     Other graphics cards are listed below:
     ┌───────────────────────────────────┬──────┐
     │ CARD				 │ MODE │
     ├───────────────────────────────────┼──────┤
     │ ATI VGAWONDER			 │ /H54 │
     │ Paradise VGA Plus/Professional	 │ /H58 │
     │ Dell VGA 			 │ /H58 │
     │ AST VGA Plus			 │ /H58 │
     │ Compaq VGA			 │ /H58 │
     │ Video7 VRAM/Fastwrite		 │ /H62 │
     │ Orchard Designer VGA		 │ /H29 │
     │ Genoa Super VGA/VGA Hi-Res	 │ /H29 │
     │ Sigma VGA/H			 │ /H29 │
     │ STB VGA Extra			 │ /H29 │
     │ Tecmar VGA-AD			 │ /H18 │
     │ Everex EVGA			 │ /H70 │
     └───────────────────────────────────┴──────┘
     If your card isn't listed then you should determine
     the 800x600 mode from the instruction booklet that
     came with your card.

     You may need to adjust your monitor to display
     the 800x600 graphics mode properly.
     Use the vertical and horizontal size and position
     controls on your monitor to display the entire
     image without distortion.

  4) IBM 8514 mode with 1024x768 resolution is not
     supported at this time.

%142,4,5,17,60,HELP: Printer Type
You can select a compatible printer type from the list of
supported printers. Check your printer documentation to
determine which of the supported types that it emulates.

Printers supported and Print Resolution (dots per inch)
    ┌──────────────────────────────────────────────┐
    │ Epson compatible 8-pin printers	 (120 dpi) │
    │	- Epson FX, MX, RX, LX series		   │
    │	- IBM Graphics or Proprinter		   │
    │	- Okidata 192I+, 193I+, 292, 293	   │
    │	- Okidata in IBM mode			   │
    │	- Panasonic KX-P1080i, P1091i, P1093	   │
    │	- Cannon PW-1156A			   │
    │	- Citizen MPS-25			   │
    │	- Star Micronics: Gemeni 10X		   │
    │						   │
    │ Okidata compatible 8-pin printers  (120 dpi) │
    │	- Okidata 192, 193			   │
    │						   │
    │ Apple ImageWriter II		 (160 dpi) │
    │						   │
    │ Epson  24-pin compatible printers  (180 dpi) │
    │	- Epson LQ series			   │
    │	- IBM Proprinter X24 and XL24		   │
    │	- Panasonic KX-P1124			   │
    │						   │
    │ Toshiba 24-pin compatible printers (180 dpi) │
    │	- Toshiba P321, P341, P351		   │
    │						   │
    │ IBM Pageprinter 3812		 (240 dpi) │
    │						   │
    │ PCL command compatible		 (300 dpi) │
    │	- HP LaserJet series II 		   │
    │	- HP DeskJet				   │
    │	- Apple LaserWriter II			   │
    │	- IBM LaserPrinter			   │
    └──────────────────────────────────────────────┘

%143,4,5,17,60,HELP: Printer Destination
You can select the printer destination. The print
destination can be:

LPT1 : first locally attached parallel printer

LPT2 : second locally attached parallel printer

DOS output device :

 - an external printer shared on a local area network.
 - a DOS disk file which will create a print-ready file.

The first two choices (LPT1, LPT2) use the computer BIOS
functions for sending data to a printer attached to a
parallel port. This is the fastest way to print an image.

  NOTE:
  If you are using a printer attached to the Serial Port
  (COM1) then you need setup the Serial Port using the
  DOS MODE command before starting the WeatherFAX program.
  These commands could be placed in your AUTOEXEC.BAT file.

  1) Set the baud rate and other parameters with the
     DOS MODE command. (e.g., MODE COM1:96,N,8,1,P)

  2) Redirect LPT1 to COM1 with the DOS MODE command
     (e.g., MODE LPT1=COM1)

  3) Start WeatherFAX program and set the Printer
     Destination in the SETUP MENU to LPT1

%144,4,5,4,40,HELP: Wide Carriage
Enter YES if:
1) your printer has a wide carriage AND
2) you want the images printed with
   wide paper.

%145,4,5,11,60,HELP: Test Printer
This test will print a sample of the various shading
patterns to the attached printer. This will allow you
to check the operation of the printer.

NOTE: Some printers can be attached to either a Parallel
or a Serial computer port.  These printers usually are
configured for either 7 bit or 8 bit graphics mode.
Be sure that the printer is configured for 8 bit mode.
Otherwise the printed sample will have a blank row (space)
every 8 lines.

%201,4,5,11,55,HELP: Filespec Menu
To view a list of files on a disk or in a directory,
enter just a drive or directory name and press Enter.
To list selected files, use * or ?.  Example: a:*.TIF

Type a filename with an optional extension of a period
and up to three characters.  You can include a drive
and a path of directory names up to 45 characters.
You can type over the default drive and directory
names.	Press Home, type the drive, press Cursor Right
to move over the colon, and type the directory name.

%202,4,5,7,42,HELP: Get File
This file has an unknown file format.
It was not saved using this Fax program.

You must enter the Pels Per Line and
Pels Per Byte parameters.  If these are
not set correctly then the image will
not display correctly.

%206,4,5,6,50,HELP: Save Range
You can save either the entire image or just the
displayed portion.

If you save the entire image then the image is
saved starting at the top displayed row and left
hand column. The remainder of the image is saved.

%207,4,5,17,60,HELP: Save Format
You can save the image in either the TIFF or the GIF
file format.  These standard image file formats allow
images to be imported as graphics files into various
painting and Desktop Publishing applications that support
either of the formats.

TIFF (Tag Image File Format) has fast file operations and
stores an image as an uncompressed raster-scan gray-scale
image.	Each byte stores either 4 or 8 bits of gray scale
information for each pixel digitized.

GIF (Graphics Interchange Format) is the standard format
used for storing images by CompuServe and other computer
bulletin boards systems (BBS).	GIF is much slower than
TIFF, but uses an efficient compression algorithm that
minimizes file size and saves disk space.

%208,4,5,2,20,HELP: Save Image

No help available

%211,4,5,17,60,HELP: Print Mode
┌─────────────────────────────────────────────────────┐
│ Dot	 Number 				      │
│ matrix shades    Description			      │
│ ────── ───── ───────────────────────────────────────│
│ 1x1	  1    Black and white			      │
│ 2x2	  4    4 halftones			      │
│ 4x4	 16    Bayer dither   - high resolution       │
│ 4x4	 16    Fatting dither - high contrast	      │
│ 4x4	 16    Horizontal Line dither.		      │
│	       Emphasizes vertical lines	      │
│ 4x4	 16    Vertical line dither.		      │
│	       Emphasizes horizontal lines.	      │
└─────────────────────────────────────────────────────┘

Dot matrix - Number of horizontal and vertical dots printed for
each pixel.

Number shades - Number of gray scales.

%212,4,5,17,60,HELP: Print Range
You will need to view the image to align the top line and
left column to be printed. You can print either the entire
image or just the displayed portion.

If you print the entire image then the image is printed
starting at the top displayed row and left hand column.
This helps you to align the image to be printed.  The
remainder of the image stored is printed.

If you print only the displayed portion then the print size
depends upon the selected graphics mode. VGA and EGA modes
print more area then CGA and MCGA modes. You may want to
change the graphics mode before printing to adjust the size
of the printed image.

%213,4,5,4,40,HELP: Print Title
The title you give is printed at the
top of each picture. This option is
useful for labeling the pages.

%214,4,5,4,40,HELP: Time and Date
If you select Yes then the current
time and date is printed at the top
of the page.

%215,4,5,3,60,HELP: Print Image
Prints the image stored in the buffer using the selected
print options.

Before printing for the first time:
- Select your printer type on the Setup Menu.
- Set the desired print gray scaling on the Print Menu.

You may then print the image one of two ways.

1) You can choose the Print option while viewing the
   image.  This will only print the portion of the
   image displayed on the screen. If the screen is Zoomed
   then the printing will be scaled accordingly.

2) View the image to align the top and left corner of
   the image to be printed then exit back to the Print
   Menu.  You can now the the desired print gray scaling
   and print either the screen or the entire image
   starting from the top left corner.

%301,4,5,17,60,HELP: Adapter Mode
The fax adapter can capture three types of
weather facsimile images:

- HF Fax.  These image are usually Marine weather
  facsimile and are received on HF radio on shortwave
  radio frequencies (e.g., 8080 kHz). The adapter is set
  to FM mode.  The fax adapter allows the FM signal to be
  within a wide amplitude range.  However if the signal
  output from your receiver is very strong or very weak
  then you can then you can compensate by adjusting
  attenuation pads on the adapter.  F4 allows you to
  change the pads.

- WEFAX.  This is the format for geostationary weather
  satellites (GOES). The receiver is usually tuned to
  S-Band 1691 MHz. The adapter is set to AM mode and
  Automatic Gain Lock (AGL) is used to set the correct
  level for any type of image.

- Polar satellites.  These are images transmitted from
  polar orbiting satellites (e.g. NOAA) at VHF frequencies
  between 136 and 138 MHz.  The adapter is set to AM mode
  and a fixed gain level is used.  F5 allows you to set
  the fixed gain level.  The gain should allow the AM signal
  to vary over a wide dynamic range without clipping.

%302,4,5, 8,50,HELP: Scans Per Minute
Selects the number of image lines sampled every
minute.  Use the same value as that of the
signal that you receive.

NOTE: Typical SPM rates:
      GOES (WEFAX)    = 240
      Polar (NOAA)    = 120
      HF fax (Marine) = 120

%303,4,5,17,60,HELP: Pels Per Scan Line
Selects the number of samples (pixels) stored for each
image line.  You would typically set this value to be at
least as large as the resolution of your graphics display
mode (e.g., 640 for EGA or VGA).

This sets the resolution of the image and affects the
amount of computer storage needed to hold the image.
The equation for image size (bytes) is:

IMAGE_SIZE = PELS_PER_LINE * NUM_LINES / PELS_PER_BYTE

Where:
    PELS_PER_LINE = pixels stored for each image line
    NUM_LINES	  = lines in the image
    PELS_PER_BYTE = pels stored per byte, either 1 or 2

NOTE: The greater the number of Pels Per Line the greater
    the image resolution.  However the maximum value may
    be limited by the speed of your computer.  For earlier
    PCs having a 4.77 MHz clock speed use a maximum
    value of 700 when using 240 Scans Per Minute.

The 'squareness' of the displayed image depends upon both
the Index of Cooperation (IOC) of the received image, the
Pels Per Line setting, and the aspect ratio of your display
adapter.  The relationship for these parameters is:

    PELS_PER_LINE = π * IOC * ASPECT 

Where:
    π	   = Pi = 3.14
    IOC    = Index of Cooperation of received signal
	     GOES (WEFAX)	 = 268
	     polar satellites	 = 288
	     HF fax (Marine)	 = 576
    ASPECT = horizontal/vertical pixel density set by
	     adapter display mode, not the physical
	     size of the display.
	     Extended VGA, VGA	 = 1.00
	     EGA (640x350)	 = 0.73
	     CGA, MCGA		 = 0.83

Example: If you want to receive WEFAX (IOC = 268) in VGA
    display mode then for a square picture you should set
    842 pels per line.

%304,4,5,15,60,HELP: Pels Per Byte
The fax program uses all of the available memory in your
computer to capture images.

If you have limited memory (less then 512 KB) then
consider selecting 2 pels per byte. This value saves
memory by packing two pixels into each memory storage
byte which allows you to capture images twice as large.
The image is stored with 16 shades and once captured
you cannot enhance the brightness and contrast.

If you have more then 512 KB of memory or expanded memory
(LIM 4.0) then you should select 1 pel per byte.
The image is stored with up to 256 shades and you can
enhance the brightness and contrast of the image at any
time.

%305,4,5,17,60,HELP: Acquire Image to Buffer
Your fax receiver should be attached to the fax adapter.

The bottom line of the display is the action line.
It displays the current receive status and allows you to
select various actions while receiving the image.
Different actions are displayed using the   cursor
keys.  Press Esc to exit back to the Fax Menu.

┌───────────────────────────────────────────────────────┐
│ ACTION LINE SELECTIONS				│
│							│
│ Manual start	    Press ─┘ for manual start	  │
│ Scroll image window     - - keys scroll left/right  │
│ Darker -		    - - to adjust brightness	  │
│ Adj contrast	    - - to adjust contrast	  │
│ Printer: on/off	    ─┘   to turn printer on/off  │
│ Disk   : on/off	    ─┘   to save to disk on/off  │
│ Page alignment	    - - adjust timing.	  │
└───────────────────────────────────────────────────────┘

Disk allows you to save the image to disk as it is stored
in memory. You will be prompted for the filename to use.

 NOTE: The Disk function has been tested on IBM computers.
 However the BIOS of some computer clones disable
 interrupts when saving to disk which will cause part of
 the received image to be lost. When this happens part of
 the image will appear shifted.  Do not use this function
 if you have this type of clone computer.

Page alignment allows you to adjust the adapter timing
if the image is slanted. Once adjusted the timing will
not need to be changed again. Use cursor keys to increase
and decrease the timing value. Increase if the image
slants to the left. Decrease if the image slants to the
right.

┌────────────────────────────────────────────┐
│ RECEIVE STATUS			     │
│					     │
│  Wait       : Waiting for start signal     │
│  Start      : Start signal detected        │
│  Sampling   : Putting image into buffer    │
│  End of mem : Image size exceeds buffer    │
│  Stop       : Stop signal detected	       │
└────────────────────────────────────────────┘

%310,4,5, 9,50,HELP: Adjust Level
Allows you to set the gain of the fax adapter
so that the signal level for polar satellites
is just right.	Use the cursor keys to increase
or decrease the signal level while a satellite
signal is active so that the level covers a wide
dynamic range without exceeding the MAX value.
You can also ajust the signal level by changing
the audio gain control on your receiver.

%311,4,5,17,50,HELP: FM Attenuation
The phase lock loop on the card works for a wide
variation in signal level. You will normally keep
the attenuation set for Normal.  This setting
allows operation for input signal amplitudes that
vary between -20 dBm to +10 dBm.
However you can adjust the attenuation pads on
the adapter to compensate for very weak or very
strong FM fax signals.

┌────────────────────┬─────────────────────────────┐
│ Pad setting	     │ Signal strength		   │
├────────────────────┼─────────────────────────────┤
│ Increase (+10 dBm) │ Strong (-10 dBm to +20 dBm) │
│ Normal   (  0 dBm) │ Normal (-20 dBm to +10 dBm) │
│ Decrease (-10 dBm) │ Weak	(-30 dBm to   0 dBm) │
└────────────────────┴─────────────────────────────┘
Notes:
1) The input impedance of the adapter is 10K ohms.
2) If your signal is very weak then set the pad to
  Decrease, this decreases the attenuation
   by -10 dBm.

%230,4,5,17,50,HELP: Device Name
DOS Output Devices use the computer DOS functions
for sending data to a DOS Device Name.
Enter the name of the DOS device.
Possible device names are:

  LPT1, LPT2, PRN - DOS name for locally
		    attached printers

  COM1, COM2	  - DOS name for serial
		    communications port.
		    Use the DOS MODE command
		    to set the baud rate.

  network printer name - use name of Local Area
		    Network attached printer

  DOS disk file name  - (e.g., print.dat) This
		    will create a print ready
		    disk file of the image.

%400,10,10,10,60,HELP: RTTY Menu
Allows you to set RTTY parameters, print,
and save to a disk file.

 RTTY Parameters . .	You can set baudot speed,
			signal sense, and unshift
			on space.

 RTTY Output . . . .	The RTTY characters can be
			be printed or saved to a disk
			file.

%410,10,10,10,60,HELP: RTTY Parameters
 RTTY Speed  . . . .	Select the desired RTTY Baudot
			speed.
 RTTY Polarity . . .	RTTY signal polarity (sense) is
			either Normal or Reverse.
 Unshift on Space . . Causes shift to Letters Case when
			a space is received. This may
			reduce the number of errors when
			the channel is noisy.

%420,10,10,5,55,HELP: Ouput Menu
  Print RTTY . . . .	Send characters to printer.
  Save to File . . .	Save characters to disk file.

%510,4,5,17,70,HELP: Adapter Test
You can check the operation of the adapter at any time to verify
that it is working correctly.  Various tests can be selected to
check the operation of all of the major functions of the adapter.

Static Test	The nominal frequencies of the phase lock loops and
	      filters are displayed. All of the marks should be in
	      the OK region. This test can be used for checking for
	      normal operation and for calibration.

	      If any of the values are out of range then the adapter
	      may be adjusted with only a screwdriver.	No special-
	      ized test equipment or knowledge is required.  For
	      more information see:
	      Test/calibration of fax adapter under the HELP INDEX.

Dynamic Test	Checks the operation of the major functions of the
	      adapter.	A test signal is applied and the outputs are
	      checked to verify that all of the circuits are working.

	      Start/Stop detectors
	      The detectors allow automatic operation by detecting
	      the beginning and ending of a received image.  They are
	      tested for both On and Off states.

	      FM detector
	      Checks the operation of the Phase Lock Loop circuit
	      and the Analog to Digital (A/D) converter.  It is
	      tested at various frequencies to verify linearity.

	      AM detector
	      Checks the operation of the Automatic Gain Lock (AGL)
	      circuit, AM detector, and (A/D) converter.  The circuit
	      is tested at various amplitudes to verify linearity.

AM Graph	A test signal is applied and the AM detector
	      linearity (signal amplitude vs time) is graphically
	      displayed.  The graph should be linear and sloping
	      upward with time.

FM Graph	A test signal is applied and the FM PLL linearity
	      (signal frequency vs time) is graphically displayed.
	      The graph should be linear, sloping upward with time,
	      and centered between 0 and 256.

%900,5,5,5,5,End of file
