Usb Transmission Speed Parameters; Usb Polling Interval - Motorola MT2070 User Manual

9 - 16 MT2070/MT2090 User Guide

USB Transmission Speed Parameters

Use the following parameters to speed USB data transmission:
•

USB Polling Interval

order to increase data transmission speed.
•
Fast HID Keyboard
data transmission speed of printable (7-bit) ASCII characters.
•
Quick Keypad Emulation
the data transmission speed of a mix of both printable (7-bit) and full (8-bit) ASCII characters.
NOTE Emulate Keypad and Quick Emulation override Fast HID
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.
IMPORTANT Changing the polling interval re-enumerates the scanner. In corded operation, the user must wait up
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
3 msec
- When using more current USB systems, use this parameter to set a lower interval in
- When configured as a USB HID keyboard device, use this parameter to increase the
- When configured as a USB HID keyboard device, use this parameter to increase
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.
2 msec
4 msec