Product specifications

Interface Related Features

40 QuickScan

QS6500/QS6500BT

RS-232 Interface Features — cont.

Host Echo

When enabled, this feature passes all data through the imager to the host as it

comes in. This feature is used for applications where “daisy chaining” of RS-232

devices onto the same cable is necessary. If, for example, one of the devices in

the chain is a terminal where someone is entering data while another person is

simultaneously scanning a bar code requiring transmission to the host, the scan-

ner will wait for the RS-232 channel to be quiet for a specified period of time

(set via

RS-232 Host Echo Quiet Interval). The scanner can be set to observe this

delay before sending its data in order to avoid RS-232 transmission conflicts.

Host Echo Quiet Interval

This setting specifies the time interval of RS-232 channel inactivity which must

transpire before the imager will break the host echo loop to transmit the bar

code data that has just been scanned to the host.

Signal Voltage: Normal/TTL

Specifies whether the RS-232 interface provides TTL levels on the output pins

TxD and RTS.

RS-232 Invert

Enables/disables inversion of RS-232 TXD and RXD signals.