sauter KERN SW 1000 Instruction Manual page 36

4.4.10 USB mode
Always Ask:
The device always asks back which mode to select when connecting the USB
cable to the computer. Please consider in time which option you want to use,
otherwise the computer will not recognize the sound level meter due to time
overflow.
USB Disk Mode (USB drive):
The device always operates in USB Disk Mode (USB drive mode) without any
query when connected to the computer via the USB cable. The sound level meter
can be recognized by the computer as a removable USB drive without driver
installation. The files in the Micro SD card can be accessed directly using Windows
Explorer.
Modem Mode (Modem Mode):
In this case, when connected to a computer via the USB cable, the device always
operates in modem mode (modem mode) without query. The sound level meter
can be recognised by the computer as a serial port (virtual port) and uses the
same protocol as the RS-232 interface (for further details see
exchange protocol).
4.4.11 GPS
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The USB Mode menu allows you to set the working mode when
you connect the sound level meter to the computer with a USB
cable. Always Ask, USB Disk Mode (USB drive) and Modem
Mode are available for selection.
In the GPS menu you can enable or disable the GPS and Auto
Time Sync options. When the GPS is disabled, the internal GPS
module is turned off. The system clock of the sound level meter will
synchronize with GPS time if you enable the Auto Time Sync
option.
5. RS-232 data
SW-BA-e-2020