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Built-in automatic antenna tuner
The built-in automatic antenna tuner is a preset type that covers amateur band
frequencies ranging from 160m~6m, and can be switched in on receive too. The tuner
is capable of rapid QSY based on instantaneous band change, using a relay system
known for high-speed operations. The relays, capacitors, and inductors use large-sized
components that are able to bear the 200 W output.
Cooling system
Cooling is very important to obtain a stable output of 200 W. Heat dissipation efficiency
is increased in the TS-990 through a large fin-type aluminium heat sink. An
independent variable-speed fan is provided for the switching power supply, final unit,
and antenna tuner, cooling each unit with a sufficient air supply. The switching power
supply and the final unit have twin cooling fans. Noise is reduced by controlling the fan
speed according to the temperature.
2-5. Dual display
Main display
The main display shows basic information about the frequency, mode, meter, and
others functions, as well as the on/off status of the other accessory functions.
You can also view internal parameter settings and memory lists. In addition,
it features a band Viewscope function that allows you to monitor band status. Execute
fast sweeps with FFT processing using DSP. Switch to different view modes such as
waterfall and reception/transmission equalizer views.
Touch-Sensitive mode
Simply touch the main screen for quick
QSY re-tuning.
5
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