Pacific Crest ADL Sentry, User Manual

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6 ADL Sentry User Guide
47, of the Code of Federal Regulations.
Most frequencies sharing data transmissions and voice transmissions give priority to voice
users. Be mindful of the persistent nature of a GPS RTK data transmission and always limit
your RF transmission output power when performing close-in survey situations to avoid
interference with co-channel users. Pacific Crest recommends using the low RF power
setting for construction site and other line-of-site surveys with baselines less than two miles
(depending on terrain).
WARNING:
If you are in conflict with a co-channel user, select another frequency to avoid
formal actions by government agencies. In most cases, you are required to vacate a frequency
upon complaint by a shared channel voice user.
Most survey operations are itinerant in that the system is moved on a frequent basis. For
fixed system installations, you should not use frequencies set aside for itinerant operations,
but should coordinate a frequency based on the fixed area operation.
Regulations differ from country to country, please be aware of the local regulations before
using radio equipment.
Automatic station identification
For operation in the United States, the FCC requires that radio transmitters broadcast a
station identifier every 15 minutes. The station identifier is the call sign assigned to you on
the station license.
The radios support the broadcast of station identification in a manner that meets the
requirements of the FCC. Upon receipt of equipment, use the ADLCONF software to program
your FCC call sign into the configuration of the radio. This is only required for transmitters.
The call sign is transmitted every 15 minutes in Morse code. It is not included in any
data packet and so is not processed by the receiving radio. However, data transmission is
interrupted for a few seconds while the call sign is being transmitted. If you leave the
Call
sign field blank (on the ADLCONF’s Identification screen), the radio programmed with this
configuration file will not transmit any call sign.
WARNING:
Failure to transmit your station identification is in violation of FCC regulations.
If you are operating outside the United States, check with the local authorities if you need to
transmit a call sign.
Carrier Sense Multiple Access (CSMA)
CSMA is a technology implemented in the radios to meet the United States Federal
Communication Commission (FCC) transmitter requirements. It is illegal to transmit on any