Calibration optimizes the response of touch input. It is recommended if the instrument does not respond as expected when you press the touch screen.

The Calibrate Touch Screen submenu key is in the System Menu. When pressed, a message box is displayed with instructions for calibration. See Figure: Touch Screen Calibration Message Box. Press Enter to begin calibration, or press Esc to cancel. Alternatively, you can press 1 while the message box is displayed to use the arrow keys for navigation. Refer to Disable Touch Screen to Use Arrow Navigation.

During calibration, press the crosshairs in sequence as they appear on the screen. The process takes less than one minute.

Another way to access touch screen calibration is to press Shift, then 0 (zero). This displays the touch screen calibration message box shown in Figure: Touch Screen Calibration Message Box. The shortcut can be used if your touch inputs do not correspond to the appropriate locations on the screen to such an extent that you cannot access the Calibrate Touch Screen submenu key.

If the touch screen is not functioning, you can use Arrow Navigation to simulate pressing the touch screen main menu keys and submenu keys. From the touch screen calibration message box (see Figure: Touch Screen Calibration Message Box), press 1 to display the arrow navigation message box, illustrated in Figure: Arrow Navigation Message Box. Press 1 again to enter the arrow navigation mode, or press Esc to cancel.

In arrow navigation mode, a red border highlights the currently selected key (see Figure: Arrow Navigation Example). Use the arrow keys to move the red selection box, then press the Menu key to activate the highlighted key. Only the main menu keys and submenu keys can be activated using Arrow Navigation. This feature does not move the red selection box into other areas of the touch screen, like the display title bar, sweep window, or the instrument settings area on the left.

To save a measurement in arrow navigation mode, press Shift then File (7). Use the arrow keys to move the red selection box to the Save Measurement As submenu key. This submenu key must be used because the arrow navigation mode cannot be used to change data in popup windows in the measurement display. File names are determined by the current setting of the Save Measurement As submenu key. Refer to Save Measurement As.

You can save a JPEG image of the current display screen by pressing Shift, followed by Decimal, then +/–. The JEPG image shows screen data, but does not contain the additional measurement information that accompanies a saved measurement in a *.spa measurement file.

To return to normal touch entry mode, reboot the instrument (turn power Off, then On). If your touch screen has been damaged, refer to Contacting Anritsu for Sales and Service.