Metrologic Instruments MX003, MS6130 KB Parameter Alt Mode, Microsecond Delay, Millisecond Delay

KEYBOARD WEDGE (KB) INTERFACE (CONTINUED)

KB Parameter - Alt Mode

When this option is enabled, the scanner will duplicate this keyboard sequence: Hold down the Alt key; type the decimal number that corresponds to the appropriate keyboard character. Caution should be observed when using Alt mode because a scanner to host application conflict may occur if the host software application uses the Alt key as a “Hot” key.

Enable Alt Mode

H H 3

**Disable Alt Mode

H H 4

KB Parameter - Inter Scan Code Delay (AT and PS/2 Modes)
The time specified with an interscan code	** 800 Microsecond Delay
delay bar code represents the amount of time
between individual 9 bit scan codes. Each
character of a bar code takes between two
and twelve of these scan codes to be passed		O	C	8
through to the PC via the keyboard interface.
This parameter may need to be adjusted for
operation with certain PC keyboard BIOS’s.
Network operating systems often use	7.5 Millisecond Delay
microprocessor time slices to service network
information requests instead of the keyboard
interface. While not an issue with manually
entered keystrokes, this timing can be critical		O	C		9
with automatic scanner data entry. Interscan
code delays can be a useful system tuning

tool in these environments.

15 Millisecond Delay

KB Parameter - XT - Clean-Up Bit

Some keyboard BIOS's require a "cleanup bit" to be transmitted before an actual scan code being clocked over to the motherboard. Enabling this feature will cause the scanner to send this extra bit to the host computer. More commonly found on older XT style BIOS's, and some AT BIOS's.required( by some NEC 80286 machines).

O C 7

Enable Cleanup Bit

H H 1

** Disable Cleanup Bit

H H 2

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