How do I Scan Using a Two Switch Access / Step Scanning?
2-Switch-Scan Mode 1
Summary: Activate and hold switch A to start scanning the middle row. Activate switch A again to reverse scan. Activate Switch B to scan columns. Activate switch B again to reverse the scan. Tap the switch to select a location. Scan Mode 1 is the default scan mode for 2 switches.
To Scan
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 A starts a scan of the middle row. Press switch A again and the scan reverses. The first activation of switch B starts the scan across the columns. Activate switch B again and the scan reverses. Activate and hold the switch to start a scan. Tap a switch with a short hit to select a location that is lit.
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 is not available with 2-switch Scan Mode 1.
Note: In the Activity Row both switches move from left to right only. You cannot move from right to left.
2-Switch-Scan Mode 2 or also known as Step Scanning
Open the SELECTION TECHNIQUE MENU. In the Selection Technique option, select 1-Switch. Select More Items until you see the Scan Mode option. Select Scan Mode 2.
Summary: This is a 2-switch row/column technique. Switch A starts the scan. Switch B selects row or column. Switch A scans row or column. Switch B selects location. You can use 2-Switch Scan Mode 2 with 128, 64 and 32 locations. Press switch A to start the scan. The lights in the top row or the first column light. Hold down switch A to move the scan to the next row or column. You can also press and release the switch each time you want to move the scan to a new row or column. When you reach the row or column you want, press switch B. Then press and hold switch B to scan across or down. You can also press and release the switch until you reach the location you want. When you have reached the location you want, press switch B again. With this technique, switch 1 always moves you somewhere and switch 2 always chooses your locations.
NOTE: Stepping (press and release) or pressing and holding the switch are the only scanning options with this technique.