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Operating somewhat like micro-cell devices, each GTX32 transceiver unit
houses both transmit and receive antennas. It sends control, system and sync
coordination information to all GTX transmitters within its range. Via the TDMA
scheme, it also receives all 24 possible channels of audio data from 24 possible
simultaneous transmitters and processes the signals for return to the GTX3224
MCU. Once at the MCU, several layers of error correction and signal quality
decision are processed. While only a single GTX32 transceiver is needed for the
system to operate, utilizing multiple transceivers provides for fully redundant
receivers, and a diversity signal processing method equal to the number of
GTX32 transceivers in use in each system. A space should be covered by GTX32
transceivers much in the same way as one would set up lights to fill a space.
When multiple GTX32 units are set-up, they create a
“coverage mesh” in which
the system will operate. GTX32 transceivers send “permission to transmit”
signals to GTX transmitters when a full round-trip link can be maintained with
appropriate BER performance. Thus, if a GTX transmitter moves out of the
coverage space, transmission will cease. Transmission will begin within 1
second when the GTX transmitter returns to a location within the GTX32 mesh
coverage area. This operation is seamless and totally noise-free. There is no
signal quality degradation or other negative artifact associated with the
permission to transmit scheme.
Set-up Note:
GTX32 transceivers work best when mounted high and above the
area of desired coverage, with a more or less clear line-of-sight.
It is very
much like setting up lights to illuminate an area.
A full line-of-sight is not entirely necessary, but it is generally preferred. GTX32
transceivers can also be mounted behind light set pieces, walls, or furniture if
necessary; as long as the obstacle is not metal or metallic. Coverage range is
reduced when working through a set-wall or furniture, and this needs to be
kept in mind during placement. The transmit and pick-up pattern of the GTX32
antennas is similar to a directional shotgun with a 90’ front lobe and 70 degree
acceptance angle. The widest operational coverage can be found at
approxima
tely 40’.
