The TS-990S comes equipped with dual receivers for simultaneous reception on different bands, it also features narrow-band roofing filters on the main receiver in a full down-conversion configuration.
The TS-990S achieves the highest basic reception performance of any radio in the TS series, through the careful selection of circuits, components and accelerating analysis using triple DSP configuration.
Also, thanks to the dual TFT display and superior panel layout, it achieves both comfortable visibility and operability. Our top-of-the-line transceiver is for all radio operators who love HF.

Overwhelmingly the highest quality receiver in the TS series. The dual receivers facilitate reception on different bands. The main receiver is the highest quality receiver among the TS-900 series, thanks to its down-conversion
configuration, newly developed mixer, and five types of roofing filters. This highest quality transceiver will show its true metal in contests, and fierce pile-ups even with high-intensity signals. The TS-990S will surely satisfy any real
DX'er.

The newly developed narrow-band High-IP roofing filters show their true
value by cutting adjacent unwanted signals

The transceiver uses the down-conversion method on all amateur bands, and features five types of High-IP roofing filter. Narrow bandpass widths
selectable are 500 Hz and 270 Hz for CW operation, 2.7 kHz for SSB and 6 kHz and 15 kHz, which are suitable for AM/FM. These filters are automatically selected in tandem with DSP-based settings. Of course, manual switching is possible as
well.

Comes equipped with 0.1ppm TCXO, which combines high stability & energy saving

The standard equipment includes a TCXO (Temperature-Compensated Crystal Oscillator), which stabilizes frequencies at ¤0.1 ppm as the standard signal source. Unlike OCXO (Oven Controlled Crystal Oscillator), which requires warm-up time, this
device can start up quickly even from the power-off position, while maintaining a high level of stability. It is in compliance with European energy-saving standard Lot 6. Power consumption in stand-by energy-saving mode is less than 0.5 W.
A BNC connector on the rear panel provides 10MHz reference I/O.

The sub-receiver incorporates the TS-590S receiver.
Down-conversion occurs on the 160m/80m/40m/20m/15m bands*

The sub-receiver features performance that has exceeded its class since going on sale, thus further refining this popular receiver on the TS-590S. Because
this is particularly the case on the front end, where it employs circuit configuration that makes down-conversion possible on the leading five amateur
bands, it can be used in actual operation despite being just a sub-receiver.

* The IF bandwidth for 160m/80m/40m/20m/15m bands is (SSB/CW/FSK/PSK) for frequency levels 2.7 kHz or below.

Roofing filters, 500Hz, 2.7kHz
Frequencies of 500Hz and 2.7kHz are standard for sub-receiver roofing filters. You can maintain a more or less flat dynamic range even if interference
impinges on your reception frequency, thanks to superior close-in dynamic range properties. You can clearly catch signals under conditions made problematic
by strong close-in interference signals.

Equipped with dedicated DSP for main receiver, sub-receiver, and band scope

Kenwood continues to provide quality sound transmission that is unattainable through analog circuits. By installing the world-premiere DSP in the TS-950
and achieving IF AGC control on the TS-870, our experience has led to the use of three DSP units, one on each major block of the TS-990S. By distributing the signal processing of the main IF, band scope, and sub-IF, we have realized ample
digital signal processing power. (FM mode is AF DSP processing.)

High reliability design promises stable operation at 200W

The POWER MOS FET VRF150MP runs at 50 V in push-pull. You can obtain a stable output of 200 W on all bands. You achieve superior IMD properties by pursuing bias and matching conditions in order