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well. The opinion of many of our fans that “even for long periods of time they never get
tired of listening” is due to the characteristics of Kenwood’s AGC. The TS-990 goes a
long way in helping further refine the Kenwood tone by innovating not only the AGC
control algorithm on the DSP but also the analogue AGC unit as well.
Exacting chassis design
The sound quality of the built-in speakers is largely determined by the chassis structure.
With the TS-990, we have been able to minimize unnecessary chassis vibration
through multiple simulations from the conceptual phase. The Kenwood tone is
supported not only by circuits and DSP but also by exact chassis design.
Extensive interference elimination
and noise reduction functions
IF filter bandwidth variability
IF filter A/B/C one-touch switch instantly
IF
notch
Band elimination filter function
The noise blanker function (NB1/NB2)
DSP-based noise reduction function (NR1/NR2)
Beat cancel function (BC1/BC2)
Audio peak filter
2-4. Transmitter
High reliability design
The device uses POWER MOSFET VRF150MP,
which runs at 50V, with push-pull. You can obtain
a high, stable output of 200 W on all bands. You
can achieve superior IMD properties by pursuing
bias and matching conditions in order to fully
exploit the 30FET attributes. Further, you can
realize Kenwood’s distinctive tone by amplifying
the clean modulated signal produced by DSP with
an amplifier that exhibits excellent linearity.
