Usb Transmission Speed Parameters; Usb Polling Interval; Fast Hid Keyboard - Motorola DS4208 Product Reference Manual

5 - 16 DS4208 Digital Scanner Product Reference 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.
Changing the polling interval re-initializes the scanner.
Ensure your host machine can handle the selected data rate. Selecting a data rate that is too fast for
CAUTION
the host can result in lost data.
1 msec
3msec
- 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
2 msec
4 msec