This page contains the detailed instructions to operate with the "IZ2UUF Morse Koch CW" application.
This application is meant to exercise Morse code reception. It works by sending over the headphones sequences of CW characters. These sequences can have various sources according to the type of exercise performed: random characters groups, random words or senteces from a text file, callsigns and so on.
The user can choose among some preset exercises. These presets will simply change the app settings to implement the related exercise type.
This application runs only on Android devices.
Installation is done by simply searching for "IZ2UUF Morse Koch CW" on Google Play as any other app.
The start screen is presented when the application starts:
The two big buttons have the following use:
The preset screen is accessed from the start screen:
Koch training — This is the standard "Koch" exercise, which works by recognizing CW characters at high speed. Recommended for beginners.
Read text — The app will allow selecting an ASCII text from your phone and play it from beginning to end.
Train words or sentences — The app will allow selecting an ASCII text from your phone, select words or sentences from it and play them in random order.
Callsigns — The app will generate randomly generated but realistic callsigns.
Standard QSO — The app will generate "standard" QSO with the typical exchange of information; generated first names and QTHs are coherent with the callsign country.
User defined — Containers for user defined configurations. See User defined settings below.
The entire exercise can be configured by changing the program settings. In that screen everything about the exercise can be set, from the side tone pitch to the custom text to be used in the exercises.
Once an exercise has been configured, it can be saved into one of the "user defined settings" slots by clicking on the three dashes on the right and selecting "Save settings".
Each slot can be deleted, renamed or retrieved.
This feature is very useful when different exercises are to be performed in rotation.
The main screen is where the exercises are executed.
The top red area contains the characters/time counter, the usual play/pause/stop icons and the usual three-dots icon to access a further menu.
The reverse "A" icon allows a direct entry to the settings that defines the "Koch level", i.e. how many different symbols are to be used during the exercise. The icon does not appear if the selected exercise does not use Koch Level (for example, when reading a plain text).
The center white area is where the symbols appear during the exercise.
The bottom scroller can be used to quickly change the exercise speed; it has to be unlocked by pressing for some seconds the lock icon.
The area at the very botton is dedicated to advertising and disappears in the "Pro" version.
The menu options are:
This screen appears when an exercise is terminated, either by time expiration or because the stop button has been pressed. It also appears by selecting the "exercise check" menu option.
It proposes some ways to check the exercise results:
Read on screen — read yourself the characters on the screen and compare them with your hand written text;
Read by voice — a synthesized voice will dictate the characters for a quick comparison with the hand written notes;
Keyboard — the received text can be typed with keyboard; the app will then compare it with the original one, evidencing every error;
Example of the "keyboard" error verification window:
The settings screen is where all the exercise options can be set.
Select what kind of exercise is executed.
Speed of CW characters in WPM (Words Per Minute).
Length of the exercise
Duration of the exercise.
Number of characters per group when generating random groups. Can be fixed or variable.
Koch defined in which order characters should be learned. With this setting, you can choose how many Koch characters you want to use.
This setting allows to mark the letters that are harder for us to understand. The program will insist on them, proposing them with a much higher frequency.
Auto hard letters
If set, the last two letters of our current sequence are treated as "hard letters". In this way, we get an higher frequency for the letters that have been just added to the sequence.
This is the buffer where text loaded from the device memory are stored. The user can also manually type text or pasting it from the clipboard. See the ASCII text preparation chapter for further details.
Generate callsign prefixes
Used by 'callsign' exercise, if enabled it allows generation of callsigns with prefixes like "HB9/IZ2UUF"
Generate callsign suffixes
Used by 'callsign' exercise, if enabled it allows generation of callsigns with suffixes like "IZ2UUF/P"
Spacing between characters. Standard setting is 1.0X, which means that every character is spaced the time of three dits (Farnsworth method). Enlarging the gap between letters makes recognition much easier.
Same setting as "Character spacing" but applied to words.
Setting of the frequency of the side tone.
Time the sound takes to go from zero to maximum (attack ramp). A smooth ramp will avoid clicks.
Time the sound takes to go from maximum to zero (release ramp). A smooth ramp will avoid clicks.
Allows setting a different pitch for dots (dit) to distinguish them from dashes (dah).
Time it takes from the pressure of the "Play" button and the transmission of the first note; allows settling the phone and getting ready.
Dash/dot ratio other than the standard 3:1.
If checked it will prints the letters on screen only at the end of each group or word.
Group print delay
Delay in seconds between the end of each CW word and its display on the screen; this time can be used to mentally repeat the decoded chars before reading them.
Activates the voice that reads the characters after they have been sent in CW.
Speak short letters
Speak shorter letters like "A" or "B" instead of saying "ALPHA" or "BRAVO" (Pro feature)
Time before speaking
Length of the pause between the last CW tone and the following spoken words.
Time after speaking
Length of the pause after the last spoken words.
Size of the font on the main screen.
Keep screen on
Keep screen always on during playback.
Hide the speedbar on the main screen.
Large speedbar range
Normally the speedbar on the main screen ranges to up to 50wpm to enhance resolution. This check enables it up to 100wpm.
Hide end of exercise dialog
Hides the dialog box that appears at the end of every exercise asking how to check the results. The dialog can be hidden also by clicking it's "don&t show anymore" checkbox.
Enter here your license key if you joined the "Pro" program.
The application accepts extrnal texts saved in pure .TXT ASCII format with the following rules:
<xx>; the supported prosigns are
The underscore allows specification of multiple words that are to be played as multiple words but considered as a single word altogether when the words are shuffled for randomization.
In this example,
dog cat king_cobra lion, the words "king cobra" will always be played together.
The same trick can be used to have a set of sentences (for example, like a set of proverbs) to be played randomly but without shuffling their words:
Two_wrongs_don_not_make_a_right Actions_speak_louder_than_words Beggars_can_not_be_choosers
By selecting "Words from custom string" in the Exercise type option, the proverbs above will be trasmitted in random order but each one with its own correct sequence of words.
The application supports the following characters coding:
|À||U+00C0||LATIN CAPITAL LETTER A WITH GRAVE||· − − · −|
|Ä||U+00C4||LATIN CAPITAL LETTER A WITH DIAERESIS||· − · −|
|Å||U+00C5||LATIN CAPITAL LETTER A WITH RING ABOVE||· − − · −|
|Æ||U+00C6||LATIN CAPITAL LETTER AE||· − · −|
|Ç||U+00C7||LATIN CAPITAL LETTER C WITH CEDILLA||− · − · ·|
|È||U+00C8||LATIN CAPITAL LETTER E WITH GRAVE||· − · · −|
|É||U+00C9||LATIN CAPITAL LETTER E WITH ACUTE||· · − · ·|
|Ð||U+00D0||LATIN CAPITAL LETTER ETH||· · − − ·|
|Ñ||U+00D1||LATIN CAPITAL LETTER N WITH TILDE||− − · − −|
|Ó||U+00D3||LATIN CAPITAL LETTER O WITH ACUTE||− − − ·|
|Ö||U+00D6||LATIN CAPITAL LETTER O WITH DIAERESIS||− − − ·|
|Ø||U+00D8||LATIN CAPITAL LETTER O WITH STROKE||− − − ·|
|Ü||U+00DC||LATIN CAPITAL LETTER U WITH DIAERESIS||· · − −|
|Þ||U+00DE||LATIN CAPITAL LETTER THORN||· − − · ·|
|à||U+00E0||LATIN SMALL LETTER A WITH GRAVE||· − − · −|
|ä||U+00E4||LATIN SMALL LETTER A WITH DIAERESIS||· − · −|
|å||U+00E5||LATIN SMALL LETTER A WITH RING ABOVE||· − − · −|
|æ||U+00E6||LATIN SMALL LETTER AE||· − · −|
|ç||U+00E7||LATIN SMALL LETTER C WITH CEDILLA||− · − · ·|
|è||U+00E8||LATIN SMALL LETTER E WITH GRAVE||· − · · −|
|é||U+00E9||LATIN SMALL LETTER E WITH ACUTE||· · − · ·|
|ð||U+00F0||LATIN SMALL LETTER ETH||· · − − ·|
|ñ||U+00F1||LATIN SMALL LETTER N WITH TILDE||− − · − −|
|ó||U+00F3||LATIN SMALL LETTER O WITH ACUTE||− − − ·|
|ö||U+00F6||LATIN SMALL LETTER O WITH DIAERESIS||− − − ·|
|ø||U+00F8||LATIN SMALL LETTER O WITH STROKE||− − − ·|
|ü||U+00FC||LATIN SMALL LETTER U WITH DIAERESIS||· · − −|
|þ||U+00FE||LATIN SMALL LETTER THORN||· − − · ·|
|Ą||U+0104||LATIN CAPITAL LETTER A WITH OGONEK||· − · −|
|ą||U+0105||LATIN SMALL LETTER A WITH OGONEK||· − · −|
|Ć||U+0106||LATIN CAPITAL LETTER C WITH ACUTE||− · − · ·|
|ć||U+0107||LATIN SMALL LETTER C WITH ACUTE||− · − · ·|
|Ĉ||U+0108||LATIN CAPITAL LETTER C WITH CIRCUMFLEX||− · − · ·|
|ĉ||U+0109||LATIN SMALL LETTER C WITH CIRCUMFLEX||− · − · ·|
|Đ||U+0110||LATIN CAPITAL LETTER D WITH STROKE||· · − · ·|
|đ||U+0111||LATIN SMALL LETTER D WITH STROKE||· · − · ·|
|Ę||U+0118||LATIN CAPITAL LETTER E WITH OGONEK||· · − · ·|
|ę||U+0119||LATIN SMALL LETTER E WITH OGONEK||· · − · ·|
|Ĝ||U+011C||LATIN CAPITAL LETTER G WITH CIRCUMFLEX||− − · − ·|
|ĝ||U+011D||LATIN SMALL LETTER G WITH CIRCUMFLEX||− − · − ·|
|Ĥ||U+0124||LATIN CAPITAL LETTER H WITH CIRCUMFLEX||− − − −|
|ĥ||U+0125||LATIN SMALL LETTER H WITH CIRCUMFLEX||− − − −|
|Ĵ||U+0134||LATIN CAPITAL LETTER J WITH CIRCUMFLEX||· − − − ·|
|ĵ||U+0135||LATIN SMALL LETTER J WITH CIRCUMFLEX||· − − − ·|
|Ł||U+0141||LATIN CAPITAL LETTER L WITH STROKE||· − · · −|
|ł||U+0142||LATIN SMALL LETTER L WITH STROKE||· − · · −|
|Ń||U+0143||LATIN CAPITAL LETTER N WITH ACUTE||− − · − −|
|ń||U+0144||LATIN SMALL LETTER N WITH ACUTE||− − · − −|
|Ś||U+015A||LATIN CAPITAL LETTER S WITH ACUTE||· · · − · · ·|
|ś||U+015B||LATIN SMALL LETTER S WITH ACUTE||· · · − · · ·|
|Ŝ||U+015C||LATIN CAPITAL LETTER S WITH CIRCUMFLEX||· · · − ·|
|ŝ||U+015D||LATIN SMALL LETTER S WITH CIRCUMFLEX||· · · − ·|
|Š||U+0160||LATIN CAPITAL LETTER S WITH CARON||− − − −|
|š||U+0161||LATIN SMALL LETTER S WITH CARON||− − − −|
|Ŭ||U+016C||LATIN CAPITAL LETTER U WITH BREVE||· · − −|
|ŭ||U+016D||LATIN SMALL LETTER U WITH BREVE||· · − −|
|Ź||U+0179||LATIN CAPITAL LETTER Z WITH ACUTE||− − · · − ·|
|ź||U+017A||LATIN SMALL LETTER Z WITH ACUTE||− − · · − ·|
|Ż||U+017B||LATIN CAPITAL LETTER Z WITH DOT ABOVE||− − · · −|
|ż||U+017C||LATIN SMALL LETTER Z WITH DOT ABOVE||− − · · −|
|Б||U+0411||CYRILLIC CAPITAL LETTER BE||· − − · · ·|
|В||U+0412||CYRILLIC CAPITAL LETTER VE||· − −|
|Г||U+0413||CYRILLIC CAPITAL LETTER GHE||− − ·|
|Д||U+0414||CYRILLIC CAPITAL LETTER DE||− · ·|
|Е||U+0415||CYRILLIC CAPITAL LETTER IE||·|
|Ж||U+0416||CYRILLIC CAPITAL LETTER ZHE||· · · −|
|З||U+0417||CYRILLIC CAPITAL LETTER ZE||− − · ·|
|И||U+0418||CYRILLIC CAPITAL LETTER I||· ·|
|Й||U+0419||CYRILLIC CAPITAL LETTER SHORT I||· − − −|
|К||U+041A||CYRILLIC CAPITAL LETTER KA||− · −|
|Л||U+041B||CYRILLIC CAPITAL LETTER EL||· − · ·|
|М||U+041C||CYRILLIC CAPITAL LETTER EM||− −|
|О||U+041E||CYRILLIC CAPITAL LETTER O||− · − − −|
|П||U+041F||CYRILLIC CAPITAL LETTER PE||· − − ·|
|С||U+0421||CYRILLIC CAPITAL LETTER ES||· − · · · ·|
|Т||U+0422||CYRILLIC CAPITAL LETTER TE||−|
|У||U+0423||CYRILLIC CAPITAL LETTER U||· · −|
|Ф||U+0424||CYRILLIC CAPITAL LETTER EF||· · − ·|
|Х||U+0425||CYRILLIC CAPITAL LETTER HA||· · · ·|
|Ц||U+0426||CYRILLIC CAPITAL LETTER TSE||− · − ·|
|Ч||U+0427||CYRILLIC CAPITAL LETTER CHE||− − − ·|
|Ш||U+0428||CYRILLIC CAPITAL LETTER SHA||− − − −|
|Щ||U+0429||CYRILLIC CAPITAL LETTER SHCHA||− − · −|
|Ъ||U+042A||CYRILLIC CAPITAL LETTER HARD SIGN||− − · − −|
|Ы||U+042B||CYRILLIC CAPITAL LETTER YERU||− · − −|
|Ь||U+042C||CYRILLIC CAPITAL LETTER SOFT SIGN||− · · −|
|Э||U+042D||CYRILLIC CAPITAL LETTER E||· · − · ·|
|Ю||U+042E||CYRILLIC CAPITAL LETTER YU||· · − −|
|Ѣ||U+0462||CYRILLIC CAPITAL LETTER YAT||· · − · ·|
|Å||U+212B||ANGSTROM SIGN||· − − · −|