Using 2 Switches to Scan with the SpringBoard Lite.
Plug two single switches or a dual switch into either the SWITCH A and/or SWITCH B
connectors on the left side 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.
Selection Type: AUTO/MANUAL
If you select Manual, you must have a third switch plugged into your device. You will use this switch to make your final selection.
If you select Auto, your device will automatically select the key you have scanned to after the Acceptance Time has passed.
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.
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 is the default scan mode for 2 switches.
Scan in Mode 1 with 2 Single Switches (Auto)
Auto is the default. Each switch alternates the direction of the scan between up/down and
left/right. The first activation of switch #1 starts the scan of the middle column. Press the switch again and the scan reverses. The first activation of switch #2 starts the scan across the rows. Push the switch again and the scan reverses. Press and hold the switch to start scan; tap the switch with a short hit to activate a location that is lit.
Scan in Mode 1 with a Dual Switch
The principle is exactly the same as above. The Select side of your switch scans left/right and the On/Off side scans up/down. You can choose Auto or Hold with 2-switch scanning. Column/Row has no effect with 2- Switch Scan Mode 1.
Scan Mode 2
Plug two single switches into the Switch A and Switch B jacks. If you have a dual switch, plug it into either jack. With a PRC dual switch, the Select side of the switch is Switch 1 and the On/Off side of the switch is Switch 2.
Use 2-Switch and Scan Mode 2 with the 32/36, 8 or 4 location keyboard.
Scan in Mode 2
Press Switch 1 to start the scan. The top row or first column is highlighted. To move the scan to the next row or column, hold Switch 1 down until the row or column you want is highlighted. You can also press and release the switch each time you want to move to a new row or column. When you reach the row or column you want, press switch 2. Then press and hold Switch 1 to scan across or down, or press and release the switch until you reach the key you want. When you reach the location you want, press switch 2.
With this technique, Switch 1 always moves you somewhere and Switch 2 always chooses your selections. Stepping or pressing and holding the switch are the only scanning choices with Scan Mode 2. Automatic scan is not a choice.
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.