PSC SP400rf, Programming Manual

Page: 87 / 112

G
ENERAL
F
EATURES
R44-1027
81
O
PTION
1 — S
END
ACK
TO THE SCANNER ONCE
B
ASE
S
TATION RECEIVES A MESSAGE
.
WACK M
ODE
D
ISABLED
—
ACK will be sent immediately, once the
radio layer of software detects a valid transmission from the
scanner. With WACK Mode disabled, ACK is sent to the
scanner regardless of what the interface layer (software) has
done or is doing.
WACK M
ODE
E
NABLED
2 — WACK is sent 3 once the radio layer
(software) validates the message, then ACK is sent to the
scanner once the interface layer (software) validates the
transmission from the scanner and has received an ACK from
the host (if the interface supports handshaking).
POWER
CH
AR
GE
TX/
RX
ACK
1
O
PTION
2 — S
END
ACK
TO THE SCANNER AFTER MESSAGE IS TRANSMITTED TO THE HOST
.
WACK M
ODE
D
ISABLED
—
ACK will be sent immediately, once the
radio layer of software detects a valid transmission from the
scanner. With WACK Mode disabled, ACK is sent to the
scanner regardless of what the interface layer (software) has
done or is doing.
WACK M
ODE
E
NABLED
2 —
WACK is sent
3
once the radio layer
(software) validates the message, then ACK is sent to the
scanner once the interface layer (software) validates the
transmission from the scanner, has sent the full message to
the host, and has received an ACK from the host (if the
interface supports handshaking).
POW
ER
CH
AR
GE
TX/R
X
WACK
ACK
2
ACK
2 When WACK mode is enabled, wait time for host acknowledgement is a critical
setting. Reference the feature in this section titled "
Wait Time for Host Acknowl-
edge".
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 WACK is never perceived by the scanner.