Vertex Standard VX-456, Руководство по эксплуатации

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The use of the Citizen Band Radio Service is li-
censed in Australia by the ACMA radio communica-
tions (Citizens Band Radio Stations) class licence
and in new Zealand by the ministry of Economic
Development New Zealand (MED). A General user
radio licence for Citizens Band Radio and operation
is subject to conditions contained in those licences.
The class licence for users and equipment operating
in the CB/PRS 477 MHz band has been amended.
This radio meets the new 80 channel standard.
In simple terms the same amount of spectrum is
available; however, radio transceivers can now op-
erate in a narrower bandwidth and hence use less
spectrum.
These radios are generally referred to as narrowband
or 12.5 kHz radios. By using 12.5 kHz channel spac-
ing instead of 25 kHz, the 40 channels originally al-
located can now be expanded to 80 channels thereby
doubling the channel capacity and relieving conges-
tion in the UHF CB/PRS band. Original 40 channel wideband radios will continue to
operate on the original 40 channels, however they will
not be able to converse on the newer channels 41 - 80.
The newer narrowband radios will be able to con-
verse with all older 40 channel wideband radios on
all channels 1 to 40 as well as the newer channels
allocated from 41 to 80.
The mixing of narrowband and wideband radios in
the same spectrum can cause some possible operat-
ing issues of interference and varying levels of re-
ceived volume.
Possible Issues
When a new narrowband radio receives a transmis-
sion from an older wideband radio the speech may
sound loud and distorted - simply adjust your radio
volume for best performance.
When an older wideband radio receives a signal
from a new narrowband radio, the speech may sound
quiet - simply adjust your radio volume for best per-
formance.