9 - 16 MT2070/MT2090 User Guide
USB Transmission Speed Parameters
Use the following parameters to speed USB data transmission:
•
USB Polling Interval - When using more current USB systems, use this parameter to set a lower interval in
order to increase data transmission speed.
•
Fast HID Keyboard - When configured as a USB HID keyboard device, use this parameter to increase the
data transmission speed of printable (7-bit) ASCII characters.
•
Quick Keypad Emulation - When configured as a USB HID keyboard device, use this parameter to increase
the data transmission speed of a mix of both printable (7-bit) and full (8-bit) ASCII characters.
USB Polling Interval
This option speeds data transmission for all USB devices except CDC. Scan a bar code below to set the polling
interval. The polling interval determines the rate at which data can be sent between the scanner and the host
computer. A lower number indicates a faster data rate. The default value is 8 msec.
NOTE Emulate Keypad and Quick Emulation override Fast HID
IMPORTANT Changing the polling interval re-enumerates the scanner. In corded operation, the user must wait up
to 10 seconds (depending on the system) prior to resuming scanning bar codes. If the user
continues scanning without waiting the required time period data may be lost.
CAUTION Ensure your host machine can handle the selected data rate. Selecting a data rate that is too fast for
the host can result in lost data.
1 msec
2 msec
3 msec
4 msec
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