The most rewarding results often take place when faced with the harshest and most challenging conditions. There are enthusiasts who know this all too well because of their love of DX. KENWOOD has the answer. Achieve results through certainty and not circumstance. Delivered through impeccable receiver and audio performance.

RECEIVER

Top in its class with three dynamic ranges.
Alive and well, the non-tiring KENWOOD tone keeps you listening.

Receive performance on a whole other level from narrow bandwidth roofing filters that only full down conversion can provide

The TS-890S uses 8.248MHz 1st IF frequency down conversion for its receive signal system in order to continue the adjacent interference signal exclusion legacy refined in the TS-990S. This means you can use narrow bandwidth crystal filters with passband widths of 500Hz or 270Hz (optional YG-82CN-1) as roofing filters to achieve strong exclusion of unnecessary adjacent signals. The 1st mixer is the H-mode mixer also carried by the TS-990S. Conversion characteristics have been improved with fine-tuning of input/output matching as well the device used.

3rd intermodulation dynamic range
(3rd IMDR)

Reciprocal mixing dynamic range
(RMDR)

Blocking dynamic range
(BDR)

Measurement conditions (shared) Frx=14.2 MHz, PRE AMP OFF, BW 500 Hz, CW
Vertical axis: Dynamic range (shared)
Horizontal axis: Interference signal interval (3rd IMDR), interference signal isolation frequency (RMDR, BDR)
・Values are measured examples.
High-speed scanning with independent band scope receiver

The configuration of the band scope receiver has changed from the superheterodyne system used in the TS-990S to 1st IF sampling using an A/D converter (14bit/39MHz), and FPGA digital down conversion. This means a change in scanning method from step FFT to FFT, achieving highspeed updates to the display irrespective of span settings.

Local oscillator realizes superior C/N

Interference signal exclusion is not determined by roofing filters and signal system devices alone. The TS-890S has taken the VCO division of the TS-990S and developed it further, combining a VCO device with high C/N in the gigahertz band and a reference oscillation circuit with superior adjacent C/N to deliver C/N characteristics unattainable in conventional units.

1st Local OSC Phase Noise (14.1MHz)
・Values are measured examples.
The speed and quality of KENWOOD’s renowned IF AGC control

A variety of functions are realized through 32-bit floating-point DSP technology inherited from the TS-990S, including modulation/demodulation in all modes, IF filter, IF-AGC, and removal of interfering signals. Popular for its non-tiring and great-quality audio, the IF-AGC has undergone a facelift with a combination of roofing filters and IF filters, and has been designed to enable optimal control under various noise circumstances.

For IF DSP, transmitter
ADSP-21363 clock @332MHz

For band scope
ADSP-21363 clock @332MHz
Other receiver system features

    ● RF ATT(OFF/6/12/18dB)
    ● Preamp(PRE1/PRE2)
    ● Receive only antenna connector(RX IN, RX OUT)
    ● Antenna output connector

DIVERSE INTERFERENCE/NOISE REMOVAL FEATURES

IF filter
Passband frequency range expansion through LOW-CUT/HI-CUT, WIDTH/SHIFT. Interfering signal removal and desired audio-quality adjustment, as well as more convenient operation in digital mode. Operation with LOW-CUT / HI-CUT in SSB/AM/FM mode, WIDTH/ SHIFT in CW mode, and WIDTH function in FSK/PSK mode. Change to WIDTH/SHIFT operation as in CW mode also possible in SSB/SSBDATA mode. Selection of roofing filter (270Hz*/500Hz/2.7kHz/6kHz/1 5kHz) can be automatic to match IF filter passband width or manual to selectable frequencies.
(* 270Hz when option mounted)

IF filter shape, AF filter
Switching is possible between 3 kinds of IF filter shapes: Medium/ Soft/Sharp. Switching is also possible for post-demodulation voiceaudio between 3 kinds of AF filter passbands: Medium/Wide/ Narrow. Combinations of these settings can adjust the sharpness of the demodulation signal.

Audio peak filter
This is a narrow bandwidth peak filter operated during receive in CW mode. When intelligibility is low due to noise, it has the effect of floating the target signal and increasing intelligibility. The central frequency is linked to the pitch frequency, and can be given a maximum peak gain of +6dB.

Notch filter
A notch filter that operates in the IF stage. By eliminating strong interfering signals, it allows weak target signals to stand out. Damping range can be switched between three levels: Narrow/Middle/Wide, enabling operation to match interference conditions.

Noise reduction function (NR1/NR2)
In addition to conventional NR1/NR2 noise reduction, NR1 comes equipped with noise reduction using spectral-subtraction, which focusses on noise reduction in voice-audio system modes. The optimum noise reduction method is applied for each receive mode.

Noise blanker
A noise blanker reduces crackling, pulse-type noise. The TS-890S includes two kinds of noise blankers: NB1, which processes analogue signals, and NB2, which carries out digital processing in the IF stage using DSP. Furthermore, selection of NB2 can be made from two kinds of NB with different operating principles. Either NB1 or NB2 can be used depending on noise conditions, or both can be used simultaneously.

Beat cancel function (BC1/BC2)
While a notch filter (IF stage) is effective for a single strong beat, beat cancelling (AF stage) shows results on multiple, comparatively weak beats. BC1 is effective on weak beats and continuous beats, while BC2 is effective on intermittent beats like CW signals.

AGC Quick recovery
A function to recover from suppression that happens when pulse noise is included in a receive signal.