By applying the best of its DSP technology, Kenwood has succeeded in developing the TS-87OS, a new generation of HF SSB transceiver that offers superior digital interference reduction as well as receiver performance of a quality hitherto impossible using the conventional analogue circuitry. New HF transceivers based on this design concept are collectively called the "Intelligent Digital Enhanced Communications System''.
MAIN FEATURES
1 . High-Frequency DSP for post-IF signal processing
a) Digital RX filters
The TS-870S features post-IF digital filters for all modes - SSB, CW, AM, FSK and FM, world first, - offering precise performance that is unobtainable with analogue circuits. Bandwidth of the digital filters can be optimised in various working conditions. You are now also free from struggling to put the optional IF filters, thanks to the new razor-sharp digital filters.
SSB Mode Hi-cut 1.4 - 6.0kHz (12 steps) Low-cut 0 - 1000Hz (10 steps) CW Mode VBT 50 - 1000Hz (6 steps) SHIFT 400 - 1000Hz (1 3 steps) FM Mode VBT 5 - 14kHz (6 steps) AM Mode Hi-cut 2.5 - 7.0kHz (6 steps) Low-cut 0 - 500Hz (4 steps) FSK Mode VBT 250 - 1500Hz (4 steps)
b) Noise reduction
The TS-870S is capable of picking out a target signal that is buried in noise. To accomplish this, it employs the line enhance method for SSB mode and the SPAC method for CW mode.
c) Beat cancel
This cancels out the sort of multiple beat interference that can affect reception automatically, which is impossible for analogue circuits.
d) IF auto notch
This is a filter which, when beat interference is experienced, attenuates only the interfering signal. Should the frequency change, the filter adjusts automatically.
Thanks to the post-IF DSP, it offers more precise performance than previously possible.
e) Selectable TX audio quality & characteristics.
3 types of adjustment are possible..
Thanks to DSP technology, the quality of signal detection is better than possible with conventional transceivers, in terms of both low distortion and high sound quality.
2. High-speed PC control
Using a PC it is possible to control at high speed every TS-870S function, including power on/off. When the RS-232C connector on the rear panel is hooked up to a computer, data speeds of 57,600bps are possible.
3. Automatic Antenna Tuner that work both TX and RX
The built-in automatic antenna tuner, which is pre-set to cover amateur bands in the range 1.8 to 28 MHz, enables rapid tuning. It is also possible during RX to pass the signal to the automatic antenna tuner.
4. Full range of features for CW operations
a) Built-in multi-functional electronic keyer
The TS-870S has a 4-channel message memory for its multi-functional electronic keyer, which is based on the K1 LogiKey*.
b) Full break-in and semi break-in (selectable)
c) 2 key connectors (on the rear panel)
d) CW pitch control The user can control the pitch between 400 and 1,000 Hz in 50 Hz steps.
e) Selectable leading / trailing edge for CW waveform
The user can choose values of 2ms, 4ms, 6ms and 8ms for the leading edge
(key down) and trailing edge (key up).
*K1 LogiKey is a registered trade mark of K1 LogiKey.
5. DRU-3 digital recording unit (option)
By adding the DRU-3 unit, up to 60 seconds of continuous digital recording is
possible.
6. 100 memory channels
In addition to 99 channels available as split memory, 1 channel is set aside for
programmable VFO and programmable scan use.
7. Multiple scan functions
Scanning functions include selectable speeds, busy stop settings, and the following three functions.
a) Memory scan
The user can choose between scanning all memory channels with data, and
scanning groups of 10 channels.
b) Channel lock-out
Unwanted channels can be skipped during scanning.
c) Programmable scan
8. Menu system
The TS-870S is designed to simplify front-panel operation to ensure user convenience, and this includes the 68-item menu system, which enables the user to adjust various settings with ease. The user can switch between A and B menus. The contents of each menu will be displayed at the alphanumeric sub-display.
9. Programmable function keys
Four keys surrounding the tuning knob can be used as programmable function (PF) keys. Each can be assigned a specific menu function.
10. TX AGC
Automatic gain control ensures that, however much the audio level changes, the modulation of the TX signal is constant. TX AGC performs just the right control for SSB, FM and AM modes.
SPECIFICATIONS (tentative)
GENERAL Operating Frequency RX: 0.1 - 30MHz Range TX. 1.8 - 30MHz (Amateur bands only) Modes SSB, CW, FSK, AM & FM Operating Temperature -10'to 50'C Input Voltage DC 13,8V ± 5% Current Drain RX. 2A (no signal) TX. 20.5A (max. transmit) Dimensions (WxHxD 330x 120 x 334 mm Weight 11 kg Frequency Stability 10 X 10-6 ±0.5 x 1 0-6 (with SO-2) Antenna Impedance 50 Ohms RECEIVER Circuitry Quadruple conversion system Intermediate Frequency 1st 73.05MHz 2nd 8.83MHz 3rd 455kHz 4th 11.308kHz Sensitivity SSB, CW, FSK 100 - 500kHz less than 1 µV 500kHz - 1.705MHz less than 4µV 1.705- 24.5MHz: less than 0.2µV 24.5 - 28MHz less than 0,13µV 28 - 30MHz less than 0.13µV AM (S/N 10dB 100 - 500kHz less than 2µV 5OOkHz - 1.705MHz less than 31.6µV 1.705- 24.5MHz less than 2µV 24.5 - 28MHz-. less than 2µV 28 - 30MHz: less than 2µV FM (12dB SINAD) 28 - 30MHz less than 0.25µV Spurious Response Image ratio: more than 8OdB (1.8 - 30MHz) IF rejection.. more than 8OdB (1.8 - 30MHz)
Selectivity Mode Setting Value -6dB -60dB CW Width. 200 200Hz 450Hz SSB Lo: 300 2300Hz 3300Hz Hi.. 2600 FSK Width: 500 500Hz 1000HZ AM Lo.. 1 00 9khz 12kHz Hi. 4000 FM Width: 14k 14kHz 18kHz
Audio Output - More than 1.SW (8@- at 10% distortion)Digital filter settings
SSB Hi h-cut (kHz0
1.4 1.6 1.8 2.0 2.2 2.4
2.6 2.8
3.0 3.4
4.6 6.0
SSB Low-cut (Hz)
0 50 100 200 300
400 500
600 800
1000
CW: Band width (Hz)
50 100 200 400 600 1000
CW: Center frequency (Hz)
400 450 500 550 600 650 700 750 800 850 900 950 1000
FM : Pass-band Band width (kHz)
5 6 8 10 12 14
2.5 3 4 5 6 7 AM: Low Cut (Hz)
0 100 200 500
250 500 1000 1500 TRANSMITTER
RF Power Output 100W (SSB, CW, FSK & FM) 25W (AM) Unwanted Sideband Suppression More than 5ODB Carrier Suppression More than 5ODB Spurious Response Less than -6OdB Auto Antenna Tuner Matching Range 20 - 150 Ohms