Using a Single Switch (1 Switch Scanning) to Scan the SpringBoard Lite.
When you select 1 Switch as an access method, you see a screen that contains a number of ways to scan with one switch. Below are brief descriptions of the technique terms.
Plug a single switch (or a dual switch using only the SELECT side) in either the SWITCH A or SWITCH B connector on the right side panel of your device.
If you are unsure how you want to use the 1 Switch method, we highly recommend that you try out the different 1-switch techniques to find the one that suits you best.
Scan Top Row: FIRST/LAST
Scan the Activities and Text Display Area first or last in your scan.
Scanning Speed
This is the amount of time it takes for your device to move from one key, row, or column to the next in a scan. The default scanning speed is one second. This means it takes one second from the time one key is highlighted until the next key is highlighted.
Acceptance Time
The amount of time you must hold your switch down before the key you have scanned to is accepted. The device beeps when your key is accepted. For example, if you set acceptance time for .50 seconds, you must activate and hold your switch for ½ second before the key will be selected and the device beeps.
Release Time
This tells your device how long to wait after you release your switch before you can make another activation with the same key or switch. For example, if you set the Release Time for 1 second, you must wait one second after you release your switch before you can continue to scan or activate your switch. If you release your switch and then accidentally activate it again before the release time has passed, your device will not make any activations.
Auto Repeat
This lets you choose how fast a key will repeat when you hold it down.
Predictive Selection (not available on single hit overlays)
Note: Predictive Selection and Icon Prediction are only available when you are using an overlay that requires two or more hits to bring up a message. None of the default SpringBoard overlays contain icon sequences. All vocabulary can be reached with a single hit.
This works hand-in-hand with Icon Prediction. (Icon Prediction is in the FEEDBACK MENU and the default is ON.)
When you turn Predictive Selection On, your device highlights only those icons where messages are stored. These highlighted icons are the only keys on the keyboard that will produce a response.
You can change the color of the non-active keys to grey or white. Go to the FEEDBACK
MENU, Icon Prediction and select Grey or White. Grey allows you to see the shadow of the icon on the key; white turns the entire key white so it looks blank. But if you try to select a grey or white key, nothing will happen.
Note: Icon Prediction alone allows you to press grey or white keys. The key's icon will appear in the Icon display area but no message will be spoken. Icon Prediction will work whether Predictive Selection is On or not.
Note: Remember that these two options are only available when you are using an overlay with icon sequences.
Scan Type: Auto; Hold; Step
Auto Scan
Your device automatically scans the keyboard.
Hold Scan
You must press and hold your switch to scan the keyboard.
Note: if you are using a 1 switch scanning selection that includes hold, the acceptance time will begin when you release your switch.
Step Scan
You must activate your switch each time you want to move to a new position on the keyboard.
Activation Delay
This gives you a few seconds to change your mind when you have selected a key. This is automatically set to your Scanning Speed. For example, let's say your scanning speed is set to one second (1.0). You scan to and select a key, then realize it's not the key you want. You have one second to activate your switch again to "de-select" the key and then scan to a new key.
Scan Auto Restart
When this is On, a new scan will automatically start once you have made a key selection. If it is Off, you must activate your switch to start a new scan.
Use Screen as Switch
This tells the device to let you use the display screen as a switch. Tap the screen to make selections. This option does not work in the Toolbox.
Number of Rescans
Select the number of times you want your device to automatically scan the overlay. The default is 3 times, then the scan will stop until you activate a switch to start it again.
Scan Mode: 1 or 2
Scan Mode 1
This mode uses 3 switch activations.
Activate your switch to start the scan (or tap the screen if you selected "Use screen as switch.").
If you are using Row/Column scan, the top row on the keyboard lights, then the second row lights, etc. Each time a row lights, you hear a beep. When the row you want lights, activate your switch or tap the screen to select the row. The scan moves from left to right through the columns
in the row. When the key you want lights up, activate your switch or tap the screen to select that key. If a message is stored in the location you have selected and the speech is turned On, the SpringBoard speaks the message and then returns to scanning down the rows.
If you do not make any switch activations after starting a scan, the SpringBoard automatically scans the rows or the columns three times and then stops scanning altogether. To begin another scan you must activate your switch.
To Scan in Mode 1 Using Step:
Activate your switch to highlight the top row. Activate your switch each time you want to step to a new row. When you reach the row that has the key in it that you want, wait for your switch Acceptance Time to pass. The SpringBoard will beep and highlight the first key in the row. You can either activate your switch to move to the next key, or you can wait until the Acceptance
Time passes and the SpringBoard will automatically select the first key in the row. Press your switch to start a new scan.
To Scan in Mode 2:
This mode uses 4 switch activations.
The first switch activation causes the top row to light. The scan continues automatically down the rows. When it reaches the row you want, activate and release your switch. The scan stops at the row you have chosen and Column 1 is scanned. Press the switch again and the scan proceeds across the row. When the scan reaches the key you want, press the switch to activate the location.
To Scan Mode 2 Using Step:
Activate your switch to highlight the top row. Activate your switch each time you want to step to a new row. When you reach the row that has the key in it that you want, wait for your switch Acceptance Time to pass. The SpringBoard will beep and highlight the first key in the row. Activate your switch to select the key. Activate your switch twice to step to a different key in the row.
Scan Direction:
Row/Column
The scan highlights each row of keys beginning with the top row and moving down the screen. When the row that contains the key you want is highlighted, activate your switch. The scan will highlight the separate columns in the row you selected, moving from left to right across the screen. When the key you want is highlighted, activate your switch. The device beeps when your key is accepted.
Column/Row
The scan highlights the columns first instead of the rows, moving from left to right across the screen. When the scan reaches the column that contains the key you want, activate your switch. The scan begins to highlight each key in that row. When the key you want is highlighted, activate your switch. The device beeps when your key is accepted.
Linear Left to Right
Step through the keys from left to right across the rows.
Linear Top to Bottom
Step through the keys from top to bottom down each column.