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(Revised October 1999 by Jay Stiteley & Jim Allan)

Physical Components of the Braille Lite (BLT)

Hold the BLT so the on/off rocker switch is on the right side of the device and the braille display is closest to you.

  • When the BLT is positioned as described above, the keys will appear similar to the Perkins keyboard. These keys correspond with the dots in Braille. From left to right, they are identified as keys (dots) 3, 2, 1, 4, 5, 6. The key slightly below and perpendicular to the six keys is the space bar. The long bar positioned between the space bar and the braille display is the advance bar for the display.
  • On the right side of the BLT are the on/off rocker switch and earphone jack. Pressing down on the raised part of the rocker switch will turn the BLT on. Now the rocker switch is pushed in at the end closest to the earphone jack.
  • On the left side of the device there are three ports and the power adapter socket.
    • With the BLT positioned as described above, move your finger along the left side of the BLT, close to the top edge, from front to back. First, you will find a recessed rectangular area. Within this rectangle, There are two circles. The first circle or port encountered is the disk drive port. The second circle or port is the serial or communication port.
    • Past the serial port, and outside the recessed area, there is a round hole. This is where the power adapter is plugged into the BLT. (approximately 30 hours battery life, with a two hour quick charge, maximum of four hours of charging without damaging the machine.)
    • Below the serial and disk drive ports, there is a standard parallel port.

VOCABULARY TERMS

Advance Bar
pressing right side of bar moves the display forward 18 characters, pressing left side of bar moves display back 18 characters.
Chord commands
This means that the space bar is pressed down with whatever dot keys, letters or contractions are listed in the command. For example Chord ST means pressing (dots 3-4) and the space bar simultaneously.
Writing cursor
The writing cursor is always at the bottom of the file. The reading cursor is there with it unless reading commands are given. As soon as writing begins the reading cursor jumps to the bottom of the file with the writing cursor. The writing cursor only moves from the bottom of the file when the "insert" or "delete" commands are used.
Reading cursor
The reading cursor is free to move around the file separate from the writing cursor. Caution: when using the reading commands, if the command is not executed properly, by releasing the space bar and respective dot keys at the same time, then the BLT thinks that it is a writing process and immediately pulls the reading cursor to the bottom of the file and writes the keystrokes.
Insert
This command pulls the writing cursor to the reading cursor and allows the user to insert up to the size of the clipboard.
Delete
This command allows deleting or erasing of characters, words, lines, sentences, paragraphs, or the remainder of the document. The writing cursor is pulled to the reading cursor position and the deleting process is started from the reading cursor position.
Backspace
This command will keep the reading and writing cursors together and only works from the bottom of the file. It will allow the erasing of the most recently written character. But it will only erase from the bottom of the file, not in the middle of the file. To remove a character from somewhere other than the bottom, the "delete" procedure will need to be used. The backspace command is available in the "insert" mode.
Status Menu
This menu is entered by pressing Chord ST (dots 3-4), enabling the user to change all settings (except Speech Parameters). Parameters include port settings, printing parameters, and braille display options. Chord E will exit the Status Menu, save the settings, and return to the current file.
Return
This refers to carriage-return/linefeed. Chord (dots 4-6) is used to generate a return character. When a file is transmitted to the printer, each time the printer receives a return character it will push the print head to the left margin and force a linefeed.

DESCRIPTION OF THE WRITING CONVENTIONS USED IN THESE TRAINING MATERIALS

This section describes how the training materials are written to make it clear what letters, spaces punctuation marks, etc. are part of the command and which are just written for clarity.

  • When a Chord command includes a letter, the letter will be capitalized, but the letter is NOT to be capitalized when executing the command.
  • Quotation marks are used to set off statements or messages made by the BLT or to set off words, numbers, or letters that should be entered by the user. In no situation should the quotation marks be written in as part of the statement or command.
  • The phrase (dots 1-3-5) is used to indicate which dots should be pressed for a letter or character as an additional reminder. Sometimes it may not have the parentheses around the word "dots" if it is only a single dot that is being pressed, usually this will be with a Chord command. The hyphens are only separators and the numbers represent only the dot numbers to be pressed.
  • Nemeth code numbering will be shortened to Nemeth or Nemeth numbering. This means that the braille number should be represented in the bottom four dots of the cell (dots 2, 3, 5, 6), no number is sign used, just the Nemeth digits.
  • Capitalization--individual letters that are part of a command will be capitalized to make it easier to recognize it as a command letter. The letter is NOT to be capitalized when executing the command.

SETTING THE SPEECH PARAMETERS

The speech can be controlled in terms of volume, speed, pitch, frequency, punctuation and echoing capabilities.

Chord (dots 3-4-5) will enter the speech mode. Speech Command(s) then can be given, a Chord E (dots 1-5) will exit the speech parameters and invoke the settings.

  • softer volume--dot 1
  • louder volume--dot 4
  • slower speech--dot 2
  • faster speech--dot 5
  • lower pitch--dot 3
  • higher pitch--dot 6
  • lower frequency--dots 2-3
  • higher frequency--dots 5-6

Key echo, key click, or silent keys--space bar pressed repeatedly will cycle through these options:

  • silent keys: This setting will not announce any braille writing, but it will announce Chord commands, message prompts, reading commands, and editing commands.
  • key click on: This option will operate identical to the silent keys echoing pattern and it will click with each keystroke as well.
  • echo keystrokes: This option will echo every letter keystroke that is made.
  • Speak words only when writing
    • In speech Parameters choose "silent keys"
    • Chord E, exit speech parameters
    • Chord G (dots 1-2-4-5), BLT says "Interactive on", toggles interactive mode
    • When writing words are announced when space bar is pressed
  • Punctuation Announcements:
    • This refers to the amount of punctuation marks announced while reading text.
    • z--zero or no punctuation marks announced
    • s--some punctuation marks announced, such as: parentheses, quotations, brackets. (this is the default setting)
    • m--most punctuation, speaks all punctuation marks but not spaces.
    • t--total punctuation, says all punctuation marks and spaces in reading and command statements, like "top space of space file space" This latter can become very confusing and annoying.
  • Numbers:
    • Pressing "n" (dots 1-3-4-5) will toggle between "say full numbers" and "say digits"

BRAILLE DISPLAY PARAMETERS

All display parameter changes occur in the Status Menu Chord dots 3-4. All parameters are yes/no choices, toggled with the space bar. Chord B (dots 1-2) jumps to Braille display parameters. Move down the list using Chord dot 4 or up the list using Chord dot 1. Below is a list of braille display parameters (note default parameter setting is in all CAPS).

  • Braille display ON/off
  • Speech ON/off
  • 8 dots mode on/OFF
  • Serial tracking ON/off
  • Keyboard tracking ON/off
  • Control Chars (characters) on/OFF
  • Cursor always visible on/OFF
  • Word wrap ON/off
  • End display on carriage return on/OFF
  • Display all ON/off
  • Grade 2 messages ON/off
  • Reverse advance on/OFF
  • View in Grade 2 on/OFF (converts text files to Grade 2)
    --Last braille display parameter

CREATE A FILE

  • Press Chord O (dots 1-3-5)
  • BLT says "Option."
  • F (dots 1-2-4) to indicate you want to work with a file.
  • BLT says "Enter file command."
  • C (dots 1-4) to indicate you wish to create a new file.
  • BLT says "Enter name of file to create."
  • Braille the name of the file you want to create, using grade 1 Braille symbols. It is recommended that capital signs, grade two contractions, and numbers not be used when writing the file name. Press a Chord E (dots 1-5) to accept the filename. (Note: a file with no extensions or with brl, bfm, brf, br*, extensions will be grade 2 files, all other extensions are computer braille files.)
  • You are now in your file, and may begin entering data. Grade one or two braille is acceptable for writing any file being printed to either an ink or braille printer. (Note: Grade three braille, can be used if only printing to a braille printer or using it for personal notes. The speech output will not be as clear because the translator is not capable of converting the grade three to understandable English.)

WRITING IN THE FILE

There are 3 writing modes. The default mode is Append. All text will be added to the end of the file unless the insert or delete command is used.

Other writing modes must be turned on in the Status Menu using PC Edit mode. Steps follow:

  • Chord dots 3-4
  • BLT says "Status Menu"
  • Dots 1-2-4-6
  • BLT says "PC is Edit Off" (this is the default Append Mode)
  • You now have 3 choices, entering the letter "Y", "I", or "N" for
    • Y = PC Edit mode on with append mode active at startup. You may cycle between the append, insert, and over-write modes using Chord I (dots 1-5) in the document. (note: append voice is normal (how you set it), insert voice is higher pitch, and over-write voice is lower pitch.)
    • I = PC Edit Mode on with insert mode active at startup. The default mode is append. All text will be added to the end of the file unless the insert or delete command is used.
    • N = Append only (this is the default), you are not able to switch to the other modes. To insert text in the document, the standard Insert Process must be used (see Editing Text below)

Write as you would on a Perkins braille writer. Using traditional grade two braille rules and spacing for the braille. Letter signs should be used more often.

Writing Commands

Chord B
Backspace, moves the cursor back one space and erases that character. The BLT will then announce the character to the left of the new writing cursor position. The character to the left of the cursor position is announced because if the Chord B is given again the announced character is the character that will be erased.
Chord dots 4-6
creates a carriage return in your text. If "key echo" is on the BLT says "new line"
Chord dots 4-6 Chord dots 4-6
places two new lines together thus making the beginning of a new paragraph.
Chord dots 4-5 (n), Chord E
(n) is a number. This is the TAB command, it will place (n minus 1) spaces in the document. The writing cursor will appear in the number position indicated in (n). For example, if the number 6 was used for the tab number; there will be five spaces added to the document, and the writing cursor is on the sixth space waiting for the next keystroke. (Hint: all TABs start from the left margin, not the current character position)

HINTS FOR WRITING A FILE TO BE PRINTED TO INK

  • Tabs--decide how long the print line will be when determining the tabs. Be sure the tabs are set with print in mind (five spaces for paragraphs. Remember, to get five spaces the number in the tab command must be a six.)
  • The line length, left margin, page length, and top margins are all set at the point of printing, Only use "return" when a new line or paragraph is to be started.

HINTS FOR WRITING A FILE TO BE PRINTED TO BRAILLE

If a file was originally written with printing it to ink and now it will be printed to braille, consider the following changes:

Tabs changed from five to two spaces. This will require searching with the Find Command (See Find Command below for more details )

READING CURSOR FUNCTIONS

These commands move the Reading Cursor within the file. If in "Append Mode" the writing cursor will remain at the bottom of the file. If the PC Edit is set to Y or I, and you are in the insert or over-write mode the writing cursor follows the reading cursor.

Reading Cursor Commands

Chord L (dots 1-2-3)
moves the cursor to the top of the file and says "top of file".
Chord dots 4-5-6
moves the cursor to the end of the file and says "bottom of file".
Chord dot 3
previous character, moves the cursor back one character and announces the character. The cursor is on the announced character.
Chord dot 6
next character, moves the cursor forward one character and says the new character. The cursor is on the announced character.
Chord dots 3-6
says the current character. If you press the Chord twice, the BLT says the HAM call word starting with the same letter. For example, for the letter C the word "Charlie" would be said.
Chord dot 2
previous word, moves the cursor back one word and says it. The cursor is on the first character of the spoken word. A word is defined as any string of characters between to spaces.
Chord dot 5
next word, moves the cursor forward one word and says that word. The cursor is on the first character of the spoken word.
Chord dots 2-5
says current word. Pressed twice, the BLT will spell the word. The cursor is on the first character of the word.
Chord dot 1
previous line, moves the cursor back one line and announces the line. The cursor is on the first character of the spoken line. A line is any string of characters between two single returns.
Chord dot 4
next line, moves the cursor forward one line and says the line. The cursor is on the first character of the spoken line. A line is any string of characters/words between two single return symbols.
Chord C (dots 1-4)
reads the current line and the cursor is on the first character of the line.
Chord dots 2-3
previous paragraph, moves the cursor back one paragraph and announces it. The cursor is on the first character of the spoken paragraph. A paragraph is any string of characters/words between any double set of return symbols.
Chord dots 5-6
next paragraph, moves the cursor forward one paragraph and announces it. The cursor is on the first character of the spoken paragraph.
Chord dots 1-2-4-5-6
read to end of file, will read the text in your file, starting at the cursor position. To stop the reading, press Chord E. The reading will stop at the end of the current line the cursor is on. The cursor will be on the first character of the next line.
Chord dots 1-5-6
where is cursor, speaks cursor position within the file. The position on the current line and the overall character number of the cursor in the file.
Chord R (dots 1-2-3-5)
room left in memory, announces the amount of reserved memory available in the file.

OPENING AN EXISTING FILE

There are several options for opening a file you have already created.

The following procedure works well if you remember the name of your file and how you spelled it.

  • Chord O (dots 1-3-5), BLT says "option."
  • F (dots 1-2-4), to indicate you want to work with a file, BLT says "file commands".
  • (dots 1-3-5), to indicate you want to open an existing file. BLT says "Enter file to open."
  • Enter the name of the file you want to open,
  • Execute the command with a Chord E (dots 1-5). You are now in your file and may begin editing.

This next procedure works well if you can not remember the name of your file and/or how it was spelled.

  • Chord O (dots 1-3-5), BLT says "option."
  • F (dots 1-2-4), to indicate you want to work with a file, BLT says "file commands".
  • L (dots 1-2-3), to indicate you want to hear a list of all the files in your BLT. BLT says "file list, help 9 pages …" The BLT will immediately begin reading the list of file names.
  • If you want to examine the list more closely, Use a Chord dot 4, to move down the list, or a Chord dot 1 to move up the list.
  • As the Chord dot 1 and Chord dot 4 method is being used, when you hear the name of the file you want to open, press a Chord O. You are now in your file and may begin editing.

Another way to open an existing file is to remember the number of the file. To find out the file number execute a Chord C while in the file list.

  • Chord O (dots 1-3-5), BLT says "option."
  • Braille in Nemeth the file number. If the number is nine or less the zero must be entered as part of the number. For example, to open file number eight, Chord O 08, No Chord E is necessary. The file name will be announced as it is being open.

USING THE "FIND" FEATURE

This is a method of locating specific text strings in a file. It is very useful for locating names in a phone or address list.

Find Text in Current File Procedure

  • Chord F (dots 1-2-4), to indicate you want to find a specific string of text. BLT says "Enter text to find."
  • Enter the text you are looking for. Enter enough characters (63 maximum) to have a fair chance of finding the text. Entering too much text increases the possibility of making an error. The backspace command (Chord B) is valid in Find.
  • Complete the command with a Chord E (dots 1-5). The cursor moves to the first character of the found text string being searched for, then reads from that position to the end of the line.
  • If you want to search backward instead of forward in your file, end the find string with a Chord dots 1-4-5-6. This will move the reading cursor back to the first character of the previous occurrence of the text string in the Find command.

To Find the next occurrence of the same text string, press Chord F, Chord E. Braille no text in for the statement "enter text to find"

To Find a previous occurrence of the same string press Chord F, Chord dots 1-4-5-6. Again enter no text when the BLT says "enter text to find"

Find and Replace Procedure

  • Chord F (dots 1-2-4), to indicate you want to find a specific string of text. BLT says "Enter text to find." (note: Find and Replace only works from cursor position to bottom of file.)
  • Enter the text you are looking for. Enter enough characters (63 maximum) to have a fair chance of finding the text. Entering too much text increases the possibility of making an error. The backspace command (Chord B) is valid in Find.
  • Chord R (dots 1-2-3-5), BLT says "enter replacement text"
  • Enter text you want as replacement.
  • Complete the command with a Chord E (dots 1-5).
  • The cursor moves to the first character of the found text string, BLT says "Replace, Skip, or All". Enter: "R" to replace the text, "S" to skip this occurrence, or "A" to replace all occurrences (note: to hear the found text in context enter Chord C).

Find Text in ANY File Procedure (Global Find)

  • Chord F (dots 1-2-4), to indicate you want to find a specific string of text. BLT says "Enter text to find."
  • Enter the text you are looking for. Enter enough characters (63 maximum) to have a fair chance of finding the text. Entering too much text increases the possibility of making an error. The backspace command (Chord B) is valid in Find.
  • Chord F (dots 1-2-4), BLT says "enter search options." Enter one or more of the following letters.
    • A search all files
    • R search RAM file
    • F search FLASH files
    • Z search RAM and FLASH files
    • search files in current folder
    • B search Braille files (files with no extension or extension of brf, brl, bfm, or br*)
    • D search Duxbury or Megadots files
    • T search Text files (files with txt or non-braille file extension)
    • S search small files less than 2 pages in length
    • M search medium size files, 3-10 pages in length
    • L search large files, greater than 10 pages in length
    • C perform a case sensitive search
    • Q quiet search, no file names announced
    • Dots 4-6 search currently open file
    • Dots 3-4-5-6 place file names in which search string was found in the clipboard

The following defaults are in effect-Search all RAM files both text and braille regardless of folder and not case sensitive.

Complete the command with a Chord E (dots 1-5). (note: if you do not enter any letters, the defaults are used)

The cursor moves to the first character of the found text string, BLT says "C, O, S, or Z" where

  • C = continue find
  • = stop search and open file
  • S = skip the current file and continue search in next file
  • Z = abort search
  • Chord C = speak found text in context or use Advance bar to read silently with braille display.
  • Chord dots 1-5-6 = hear file name where text was found

EDITING COMMANDS

In this section deleting, inserting, and single character corrections will be described.

Delete Text

Move the cursor to the first character of the text you want to delete. Remember: the cursor is on the first character of whatever increment of cursor movement is being used. If you want to position the cursor on a specific character use the Chord dot 6 or Chord dot 3. The cursor is on the spoken character.

Press Chord D (dots 1-4-5). BLT says, "Enter delete parameter."

  • Chord D deletes current character
  • C character(s)
  • W word(s)
  • L line(s)
  • P paragraph(s)
  • Z text from the cursor to the end of the file

After you have entered C, W, L, or P, you must also tell the BLT how many characters, words, lines, or paragraphs you want deleted. Remember, you must enter numbers in Nemeth code. For example to delete 3 characters enter C3. If only a single character, word, line, or paragraph is to be deleted, no number is needed.

Chord E. (Note: all deletions occur from the cursor to the end of the increment specified, C, W, L, or P.)

Note: all deleted text is copied to the clipboard. If text being deleted is larger than clipboard, BLT says "Insufficient space in clipboard, continue anyway. Enter Y or N"

Inserting Text

  • Position the cursor on the character or space where you want the insertion to begin.
  • Chord I (dots 2-4) BLT says "Insert mode active."
  • Enter the text you want to insert.
  • Chord E inserts text and ends the insertion mode, or
  • Chord Z (dots 1-3-5-6) aborts insertion, no text is inserted in document
  • Note: if BLT turned off before Chord E is executed all insertion text is lost. This insertion mode is different than PC Edit mode.

Overwrite

If you are editing your text and find a character you want to change, follow the steps below.

  • Move your cursor to the character you want to change.
  • Press Chord dots 2-4-6. BLT says "Overwrite."
  • Braille the new character. You DO NOT end this command with a Chord E. The BLT simply makes the correction. The cursor stays on the character that was corrected. Remember this is only good for a single character correction.
  • For multiple character replacements, change to "continuous overwrite" with Chord dots 2-4-6, Chord dots 2-4-6. When you have completed overwrite enter Chord dots 2-4-6 to end overwrite mode.

USING THE HELP FILE.

The BLT has a built-in help file. If you want to review some commands, you can open the help file using the Chord dots 1-4-5-6 command, BLT says "Help is Open." Use your "find" commands to help you locate the specific information. The BLT help file is written in Grade 1 Braille, so you will need to braille in your search string in Grade 1 Braille also. The reading commands are usable as well. When you have found the information you need, press Chord Z, and you will be returned to file you were editing. The Help File is "Write Protected," This means that no text can be written, inserted, or deleted in the Help File. The message "file is write protected" is spoken anytime a non-Chord command is given.

USING THE CLIPBOARD FEATURE

You can use the clipboard as a copy, cut and paste buffer.

Cut and Paste

  • Use the delete feature of the BLT to delete a line, paragraph, or the page. The text you have deleted is automatically moved to the Clipboard. (file number 01), or
  • If you want to delete a block of material that is not a line, paragraph or page, move the cursor to the beginning of the text you want to cut, press Chord M dots 1-3-4, BLT says "Mark".
  • Move your cursor to the end of the text you want to cut
  • Press Chord D dots 1-4-5, M (not chord), Chord E. This will delete the marked block of text from your file and move it to the Clipboard.
  • Move the cursor to the place you want to insert the material (either in the current file or in a different file.) Press Chord dots 3-4-6. BLT says "paste what"
  • Enter the letter C for clipboard. The data will be moved from the Clipboard and inserted at the cursor position.
  • Note: all deletions go to the Clipboard. Be sure that you do not delete, insert, or backspace any other text between steps 4 and 5. Otherwise, the material to be inserted will be lost.

Copy

  • Move the cursor to the beginning of the text you want to copy, press Chord M dots 1-3-4, BLT says "Mark".
  • Move your cursor to the end of the text you want to copy
  • Chord dots 1-2-6. The copy command, BLT says "Copy or Append, Enter C or A. The marked block will remain in the current file position. "Copy" will copy marked text to the clipboard, overwriting existing clipboard information. "Append" will append marked text to the end of text in clipboard.
  • Move cursor to the position in your current file or to a different file where you want to insert the text from the Clipboard.
  • Chord dots 3-4-6. BLT says "Paste What"
  • Enter "C" for clipboard

PRINTING

Cable the BLT parallel port to the printing device (ink or braille printer).

  • Chord dots 3-4, enter the status menu, BLT says "status menu"
  • "L", BLT says "printer is Epson compatible." 
    Cycle through choices with space bar. 
  • Choices are Epson, Imagewriter, or HP (must be DOS compatible). You may also use "E", "I", or "H" to select a printer choice. Default is Epson. 
    Default settings for print are: line length 75, print left margin 10, print page length 60, print top margin 6. These settings are 1 inch margins all around the page. 
    Default setting for braille are: line length 33 (8.5 by 11 inch paper), braille left margin 1, braille page length 25, braille top margin 1. If you wish to change any of these parameters use Chord dot 4 to move through Status Menu. When you hear parameter you wish to change, enter Nemeth code numbers for the new value. Save parameter setting with a Chord E, BLT announce parameter setting.
  • Chord E exits Status Menu, BLT says "Exit"

Print text to ink printer through parallel port

  • Chord T dots 2-3-4-5, BLT says "enter transmit parameter"
  • Chord T dots 2-3-4-5, formatting and translating text to parallel port (All braille is back translated to ink print characters.)

Print text to braille printer through parallel port

  • Chord T dots 2-3-4-5, BLT says "enter transmit parameter"
  • Chord B dots 1-2, formatting and transmitting braille to parallel port (printing braille prints exactly what is in the file. No braille translation occurs.)

DISK DRIVE

Connect Disk Drive to either serial (round) port on the BLT. BLT must be turned on first, Disk drive turned on next.

Saving to disk

  • Open BLT file to be saved
  • Chord S dots 2-3-4, BLT says "storage"
  • "S" BLT says "Save, enter file name"
  • Enter the file name (NO Grade 2, 8 characters maximum followed by period-dots 4-6 and a 3 character extension) (NOTE: file will be saved exactly as it is written.)
  • Chord E, BLT: "beeps"

Loading file from Disk Drive

  • Create a new file (see above)
  • Insert disk with file to be loaded (file can be text or Grade 2 braille translated file.) Chord S, BLT says "storage"
  • "L", BLT says "load, enter file name"
  • Enter file name
  • Chord E, when loading complete BLT says "OK"
  • Note: When reading this file after it is loaded and it sounds like gibberish with many punctuation marks, turn on Grade 2 translator, Chord P dots 1-2-3-4, "T", "Y"

Saving a braille file as a back translated text file

  • Chord S dots 2-3-4, BLT says "storage"
  • "W" BLT says "Save text without formatting, enter file name"
  • Enter the file name (NO Grade 2, 8 characters maximum followed by period-dots 4-6 and a 3 character extension) (NOTE: file will be saved exactly as it is written.)
  • Chord E, BLT says "n pages printed" and "beeps"

Directory of disk

  • Chord S dots 2-3-4, BLT says "storage"
  • "D", BLT says "directory, enter file name"
  • Chord E reads root directory
  • If you want to read a specific sub-directory, Enter file name (sub-directory name), Chord E to read sub-directory

USING THE CALCULATOR

The BLT has basic and scientific calculators available. Below are several of the commands available in the simple calculator.

Chord O, C -- opens the calculator. All numbers are written in Nemeth Code in the lower portion of the cell, and no number signs are used.

Math Functions

  • addition--dots 3, 4, 6
  • subtraction--dots 3, 6.
  • multiplication--dots 1, 6
  • division--dots 3, 4
  • per cent--dots 1, 4, 6
  • square root--Chord 3, 4, 5

Commands

Chord E
concludes the problem, and pressing it a second time will repeat the answer, not repeat the operational functions of the problem.
Chord F
toggles the announcements of the numbers between digits and full numbers.
Chord S followed by letters A-Z. 
This stores the current answer in a memory area labeled by the indicated letter.
Letters A-Z. 
Letters used in a problem will represent the value that has been stored in that letter.
Chord Z
exits the calculator and returns to the previous file.

MACROS

A "macro" is a single keystroke that will execute a series of keystrokes that it has been programmed to perform. The BLT has a total of 63 possible macros. Each macro can have up to 63 keystrokes in it.

Create Macro

  • Chord N dots 1-3-5-6, BLT says "Macro, Enter a character"
  • Enter the character by which you want to identify the macro, BLT says "recording"
  • Type in the commands that you would normally execute manually. It is advisable to write each step down prior to writing them into the BLT. This may minimize mistakes, or forgotten steps. Note: placing a Chord K dots 1-3 as first character of macro will silence all following keystrokes when macro is executed.
  • Chord N to save macro, BLT say "macro end."

Executing a Macro

  • Position cursor at location from which you want to execute the macro.
  • Chord J dots 2-4-5, BLT says "Macro"
  • Enter character name of desired macro to execute
  • Macro is executed

Troubleshooting

Warm Reset –returns all setting back to factory defaults, no data is lost

  • Chord 1-2-3-4-5-6, BLT says "warm reset, please verify"
  • Chord 1-2-3-4-5-6, returns all setting back to factory defaults, no data is lost

One-Handed Braille Mode

  • Dot 6 held down on turn on
  • Dot 3 held down on turn on returns to two-handed braille mode.

Silent turn on – space bar held down on turn on, no sign-on messages spoken