Transmitter (hand-held):
RF generation/controI PLL
Frequency range UHF 520 - 694 MHz.
Switching bandwidth Max.32MHz
Channel grid 100 kHz
RF power output 30mW
Nominal/peak deviation +24k Hz / +/- 45 kHz
Current loss 140mA
Use range D860TD: Max 300m (200m ideal)
Pickup Dynamic
Battery AA (1.5V)x2
Power Life 8 - 10 hours
Receiver :
Sensitivity 1 uV (sinad = 12 dB)
Switching bandwidth Max.32 MHz
Receiving frequencies 100
Channel spacing > 400 kHz
Spurious rejection 80 dB
Image rejection 80 dB
Signal/Noise ratio 90 dB
AF output 0 - 300 mV
Receiving channels Two channels
Power DC 13 - 18 V
Power consumption 5W
Size 480 x 180 x 45 mm
Weight 1.65 kg
Introduction:
Your D860TD system has been designed to suit theAustralian
Government’s new laws relating to Wireless Microphones that came into
effect on January 1, 2015. The laws limit the approved UHF frequency
range to 520 - 694 MHz. The available UHF frequency inAustralia has
been significantly reduced in bandwidth, and coupled with the types of
other technology that use this frequency band, notably TV broadcast, there
is now greater potential for frequency interference. For this reason, the
D860TD model has been been developed with 100 selectable frequencies
available, so you can choose an alternative “clean” frequency if necessary.
The frequency that TV stations use does vary by area throughout
Australia, so problem interference frequencies tend to be area specific.
Once you find a suitable frequency for your area, you should find that the
frequency does not need regular changing unless you move around
Australia.
The D860TD is a dual channel (2 microphones) True Diversity system for
professional use, with an operating distance of up to 300m (depending on
local conditions). Wikipedia describes True Diversity as:
“Theprofessional modelstransmitin VHF orUHF radio frequencyand have ‘true’
diversityreception (two separatereceiver modules, eachwithits own antenna),
which eliminates dead spots (caused by phase cancellation) and the effects
caused by the reflection of the radio waves on walls and surfaces in general.”
The whole system circuitry is controlled by a microcomputer chip, and
you can choose the frequency to be used. The frequencies are displayed
on the Receiver screen & Transmitter, allowing for convenient control of
the system. The system uses a PLL synthesiser to generate the
frequency and to ensure better frequency stability, and enable the user to
easily choose a frequency without any interference caused by the local
environment. The Transmitter (hand microphone or beltpack) is
synchronised with the Receiver using infrared technology.
Technical Data:
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