PSC SP400rf manual Wack

OPTION 1 — SEND ACK TO THE SCANNER ONCE BASE STATION RECEIVES A MESSAGE.

WACK MODE DISABLED—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 MODE ENABLED2—WACK is sent3 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).

ACK 1

OPTION 2 — SEND ACK TO THE SCANNER AFTER MESSAGE IS TRANSMITTED TO THE HOST.

WACK MODE DISABLED—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 MODE ENABLED2—WACK is sent3 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).

WACK 2 ACK

ACK

2When 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".

3In 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.

GENERAL FEATURES

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