Spectra Precision ADLCONF User Guide - Manual (Page 20)

20 ADLCONF User Guide
CSMA
ADL radios are configured in the factory to have the CSMA feature (Carrier Sense Multiple
Access) set to ON. It is illegal to transmit in the United States while CSMA is turned off.
When CSMA is activated, 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 transmit any
data received on its serial interface. If a radio signal is detected on the selected frequency,
the radio will not transmit but waits 3.3 milliseconds before checking again if it is clear to
transmit. It continues checking until the frequency is clear.
Use Forward Error Correction
Select this check box to place extra bits in the transmitted data, so that other ADL
radios receiving the data can check for transmission errors. Although data throughput is
adversely affected, using forward error correction can greatly improve range; Pacific Crest
strong recommends that you use this feature.
The check box is unavailable (grayed out) if you use Trimble protocols, which do not
support forward error correction. Select the protocol type from the Serial Interface tab.
Advanced settings
Click Advanced to access the following controls: