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HF/50MHz TRANSCEIVER | DSP/IF filter |
Equipped with dedicated DSP for the main receiver,
Extensive interference elimination and noise reduction functions
Kenwood continues to provide quality sound trans- mission that is unattainable through analog circuits. By loading the
ments, three DSP units are used, one on each major block of the
IF filter bandwidth variability
You can vary DSP filter bandwidth and eliminate ex- tensive interference depending on use and condition. You can operate it as a HI CUT/LOW CUT function in SSB/AM/FM mode, and WIDTH/SHIFT function in
Band elimination filter function
The filter is capable of varying the stopband band- width and the amount of loss. When signals that interfere with the target signal multiply, this is a
convenient func- |
| Band Elimination Filter |
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such as dampen- | (dB) | |
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WIDTH
You can avoid neighbouring signals by varying the bandpass width.
SHIFT
If the interference is on one side only, you can shift the central frequency without changing bandwidth.
ing interference | Amplitude | |
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signals, even if it | ||
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cuts down some of |
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For main IF DSP, transmission unit | For sub IF DSP, every kind of signal processing | For band scope |
WIDTH |
Intended |
signal |
SHIFT |
Target |
signal |
the target signal. | 0 | 500 | 1,000 | ||
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The noise blanker function (NB1/NB2) is equipped with digital/analogue 2 format
Equipped with an analogue noise blanker (NB1) which is considered being effective against weak
Advanced AGC control, fusing together digital and analogue
The reception sound quality of SSB and CW is not | significant role as well. The opinion of many of our | ||||
solely determined by audio frequency and filter | fans that “even for long periods of time they never | ||||
delay properties. AGC characteristics play a very | get tired of listening” is due to the characteristics | ||||
IF AGC control block diagram |
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RX IF | IF ADC | Digital NB |
| RX Audio | in helping further refine the |
Analog |
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| AGC DET | AGC DET | Kenwood tone by innovating |
AGCV | AGCV DAC | AGC DET |
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| IF Filter |
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| ATK/REL | AutoManual Notch |
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| Band Elimination Filter |
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Exacting chassis design for realizing quality sound
IF filter A/B/C one-touch switch instantly
It is possible to preset a maximum of three IF filter switch and switch instantly at any time. Set for narrow or wide,
such a function is convenient for com- petitions requiring quick operations.
IF notch
You can eliminate overpowering interference signals with a notch filter and catch intended weak signals. You can switch between the IF auto notch and the
manual notch that | IF Manual Notch BW 400Hz / 800Hz |
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noise, and a digital noise blanker (NB2). Choose the NB1 or NB2 based on noise type and reception con- dition. With NB1, stable noise reduction is possible without depending on reception bandwidth. NB2 is effective against noise that cannot be tracked by an analogue noise blanker. Plus, both the NB1 and NB2 can be used simultaneously with the
DSP-based noise reduction function (NR1/NR2)
The device is also equipped with two types of noise reduction
The sound quality of the
ϕ 77mm | Top plate oscillation |
simulation example |
can be changed |
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manually, depend- | (dB) |
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Amplitude |
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interference. |
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<Other extensive interference elimination and noise reduction functions>
Beat cancel function (BC1/BC2)
The beat cancel function is effective against relatively weak, multiple beats, whereas the IF auto notch is effective against strong beats.
Audio peak filter
You can vary bandpass width of pitch tone when there are carrier receptions like CW and FSK. FSK is compatible with mark and space frequencies.
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