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TS-890S｜Receiver

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

Photograph shows optional 270Hz roofing filter installed.

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.

3^rd intermodulation dynamic range
(3^rd 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.

1^st 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.