User's Manual

Pacific Crest Corporation ADL Access User Guide – Dealer Version Page 17 of 28
Click the Repeater check box to set up the radio to act as a repeater, i.e., to
automatically transmit the data it receives. Clicking this check box reveals the
Repeater Delay field where you enter the amount of time in milliseconds you
want to elapse between receipt of a data packet and its retransmission.
The default is 2 ms.
i. CSMA
When the CSMA (Carrier Sense Multiple Access) feature is turned on, the radio
will “listen” on the selected transmission frequency for any broadcasts. (The
selected transmission frequency is indicated in the Radio Link screen’s Current
Channel field.) If no broadcasts are detected, the radio will be allowed to
transmit. If a signal is detected, the radio will wait until there are no broadcasts
for 3.3 milliseconds.
ADL radios have CSMA turned on prior to shipment to those countries, such as
the United States, where CSMA is legally required. If the CSMA box is checked,
it is also grayed out. The radio must be returned to Pacific Crest to turn CSMA
off.
j. Forward Error Correction Type
Using Forward Error Correction places extra bits in the transmitted data so
receiving ADL radios can check for transmission errors. Although data
throughput is adversely affected by Forward Error Correction, it can greatly
improve range and so is strongly recommended.