G
ENERAL
F
EATURES
R44-1027
85
The beeper may be programmed to announce one, or any combination of
these communication events. (See the preceding section
“When to
Acknowledge”
for definitions of the various signals.):
•
Good Read — the scanner has successfully read a barcode and
sent the message to the Base Station
POW
ER
CH
AR
GE
TX/RX
Good Read
“BEEP”
•
WACK / ACK — the Base Station confirms reception and sends
a "Wait to Acknowledge" (WACK) signal to the scanner, followed
by an "Acknowledge" (ACK) command
3
.
POW
ER
CH
AR
GE
TX/R
X
ACK
“BEEP”
(“BEEP”)
WACK
(ACK)
•
NAK — data sent to the host was faulty or not received; the Base
Station sends a "No Acknowledge" (NAK) command to the
scanner.
POW
ER
CH
AR
GE
TX/RX
NAK
NAK
“Bad
BEEP”
3
In some systems, the ACK response is sent so quickly from the interface that it can
override the WACK signal. In this case, the expected beep on WACK is not sounded.
Summary of Contents for SP400rf
Page 1: ...PROGRAMMING GUIDE RADIO FREQUENCY HANDHELD LASER SCANNER...
Page 6: ...NOTES iv SP400RF Programming Guide...
Page 85: ...G ENERAL F EATURES R44 1027 79 SET SET STX SET ETX 0 1 2 3 4 5 6 7 8 9 END S ET STX ETX...
Page 110: ...104 SP400RF Programming Guide A PPENDIX B A DDITIONAL I NFO A PPENDIX C T EST B ARCODES NOTES...
Page 111: ...BLANK PAGE...
