GME TX6500S - Manual (Page 4)

4 I N S T R U C T I O N M A N UA L T X 6 5 0 0 S
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.
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
EMERGENCY CHANNELS
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.
TELEMETRY CHANNELS
ACMA regulations have allocated channels 22 and 23 for telemetry-only applications and
have prohibited the transmission of speech on these channels. Consequently the radio has a
transmit-inhibit applied to channels 22 and 23.
In the event that additional telemetry/telecommand channels are approved by the ACMA,
these channels shall be added to those currently listed where voice transmission is inhibited.
Currently, transmissions on channels 61, 62 and 63 are also inhibited and these channels are
reserved for future allocation.
FEATURES
TRANSMIT (TX)
Individually Programmable Duplex Function: User selectable only for those individual
channels in your area that have repeaters, leaving the others free for use as extra simplex channels.
RECEIVE (RX)
Silent Squelch Tail: Eliminates the Squelch noise burst in a receiving radio.
User Programmable Receive Channels: 95
Signal Receive Indicator
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