GME TX680 - Manual (Page 4)

Page 4 INSTRUCTION MANUAL TX680
PossiBle issUes
When a new narrowband radio receives
a transmission 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 performance.
Depending on how close your receiving
radio is to another transmitting radio,
there can be interference from the
transmitting radio if it is using a channel
adjacent to the channel you are listening
to. Simply try going up or down a few
channels from the currently selected
channel.
The above situations are not a fault of
the radio but a symptom of operating
wideband and narrowband radios in
the same bandwidth. This possible
interference will decrease over time as the
population of wideband radios ages and
decreases.
Further information and updates
are available from the Australian
Communications and Media Authority
(ACMA) at www.acma.gov.au and the
Ministry of Economic Development (MED),
Radio Spectrum Management at:
www.rsm.govt.nz
The ACMA has allocated channels 5/35
for emergency use only. Channel 5 is the
primary Simplex Emergency Channel.
Where a Channel 5 repeater is available,
you should select Duplex on CH 5.
NOTE: Channel 35 is the input channel
for the Channel 5 repeater therefore
Channel 35 should also not be used
for anything other than emergency
transmissions.
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 converse 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 operating issues of interference and varying levels of received volume.