> Frequently Asked Questions
> Q. How do I update the instrument firmware?
> Q. What is that Globe icon? It wasn't there before.
> Q. My touchscreen is not responding
> Q. There is an arrow cursor on the screen. How do I remove it?
> Q. How do I enable standby mode?
> Q. How do I shut down completely?
> Q. Why is there only one combined connector for the Power Meter and the InstaCal?
> Q. I pressed the power button but the power LED is slowly flashing on and off. Why?
> Q. What do these icons mean, and why do some of them change or disappear?
> Q. What is Advanced Mode?
> Q. What is Classic Mode?
> Q. How do I select Classic Mode, and how can I tell what mode I am in?
> Q. Why do many of the icons disappear in Classic Mode?
> Q. How do I switch modes?
> Q. My cable type does not show up in the cable list. What can I do?
> Q. What is the difference between OSL calibration and InstaCal?
> Q. What is InstaCal?
> Q. I already own the ICN50B InstaCal module. Can I use it with the S331L?
> Q. I saved a measurement with more than 517 points but when I open it with HHST, there are only 517 points.
> Q. I uploaded a .dat file from my PC to the S331L using Line Sweep Tools but when I try to recall it I cannot see the preview display.
> Q. What is easyTest Tools™?
> Q. What is the icon on the Menu screen?
> Q. Can I use my E series easyTest files (*.ett) with the S331L?
> Q. How do I update the instrument firmware?
> A: To update your Anritsu instrument firmware, use a high quality USB memory device with at least 250 MB of free space and FAT32 file system format.

> 1. | Insert the memory device into your PC or laptop.

> 2. | From a browser, go to the following Anritsu Products page.

> www.anritsu.com/en-US/test-measurement/products/s331l

> 3. | On the product page, press the Downloads button.

> 4. | Under the Drivers/Firmware/Software tab, you can optionally follow the Firmware Revision/Release History link to download a document detailing current and past firmware changes.

> 5. | Click on the link Firmware Update for the Site Master S331L.

> 6. | Click the Download button, then choose Save or Save As to download the installer to your PC. Do not run the executable file directly from the Web page.

> 7. | Go to the Save location designated in Step 6 and double-click the installer file, Model_Ver_USBLoader.exe, then click Run.

> 8. | In the Firmware Update dialog, click to view, then accept the software license agreement.

> 9. | Click Browse and select the Removable Disk drive where the USB device is inserted.

> 10. | Click Prepare USB Memory Stick to create the firmware update USB device.

> 11. | After the firmware update tool has finished, click through the final steps in the Firmware Update dialog to close the installer program.

> 12. | Eject the memory device from the computer.

> Note | The file structure created on the USB memory device by the installer program is necessary for a successful firmware update and must not be altered in any way.

> 13. | Insert the USB memory device into the test instrument.

> 14. | Make sure the Site Master is plugged into an AC power source and not running on battery alone. Turn on the instrument if it is currently off.

> 15. | Press Preset (9) > Reset.

> 16. | Press Update Firmware. A message will appear indicating which version is currently installed and which version was found on the USB stick.

> 17. | Press Continue to begin the update process. The instrument will copy and execute the firmware files and will reboot once completed.