NCR RealScan 7837-3000 - Connecting the Base When Powered by Host (Keyboard Wedge)

1-14 Chapter 1: Getting Started
Communication Between the Cordless System and the Host
Thecordlessscannerprovidesimmediatefeedbackintheformofa
“goodread”indication(agreenLEDonthescannerandanaudible
beep)afterabarcodeisscannedcorrectlyandthebasehas
acknowledgedreceivingthedata.Thisispossible sincethecordless
systemprovidestwo‐waycommunication
betweenthescannerandthe
base.
Whendataisscanned,thedataissenttothehostsystemviathebase
unit.Confirmationfromthehostsystemorthebaseindicates thatthe
datasentwasreceivedbythehost.Thecordlessscannerrecognizes
dataacknowledgement(ACK)fromthebaseunit.
Ifitcannotbe
determinedthatthedatahasbeenproperlysenttothebase,th e
scannerissuesanerrorindication.Youmustthenchecktoseeifthe
scanneddatawasreceivedbythehostsystem.

Connecting the

data
The
followingisanexampleofakeyboardwedgeconnection:
Base When Powered by Host (Keyboard Wedge)
AbasecanbeconnectedbetweenthekeyboardandPCasa“keyboard
wedge,”pluggedintotheserialport,orconnectedtoaportable
terminalinwandemulationornondecodedoutputmode.