KDG-SR100
Software Defined Radio (SDR)


KDG-SR100 Software Defined Radio (Front View)
KDG-SR100 Front View



KDG-SR100 Software Defined Radio (Rear View)
KDG-SR100 Rear View (ready for the installation of the 100W power amplifier KDG-PA100)



Overview

Kneisner + Doering offers a circuit board for "Software Defined Radio" with the designation KDG-SR100. The PCB is compatible to the software from Fex-Radio/USA.

Using a powerful PC and a soundcard the KDG-SR100 forms a comfortable transceiver with outstanding properties for the frequency range from 1.8 to 50 MHz. The dynamic range of the receiver is mainly defined by the soundcard. The quality of the filters, the sideband suppression and the IP3 are very good. The output power of the transmitter is 1 Watt PEP. Later a suitable transistor amplifier for 100 W as well as a stainless steel cabinet will be available which can accomodate the KDG-SR100, the amplifier and the power supply. For the PCB KDG-SR100 a power supply of 13.8 Vdc at 2 A is necessary.



KDG-SR100 PCB (2nd generation)
KDG-SR100 PCB (2nd generation)


Software

The software from Flex-Radio (Power SDR) is available free of charge. It is released under GPL (General Public License) and may be used without a license fee. The source code is available too, so that the software can be altered and developed. The performance of the software is very impressive. All parameters of the receiver and the transmitter can be changed or selected. These are for the receiver:

For the transmitter the parameters:

can be chosen.

The list is not complete. The full performance range can be found at Flex-Radio.


The Expenses

The Software Defined Radio makes sense only if the PC (and the soundcard) are already there and are available. But then the system offers the experimenter all thinkable possibilities. Thus the experimenting has shifted completely to the software.

The PC replaces or simulates a DSP (digital signal processor) as used in other digital receivers. The expenditure of a complete PC for this purpose is quite high, but the user gets the possibility to change all algorithms online and see what happens. This is not possiblle with a completed digital receiver e.g. with the KWZ-30.


Attention BC-DXers

This Software-Radio can be very interesting for you BC-DXers. It offers the reception in all modes from very low frequencies up to 50 MHz. This includes the mode DRM (Digital Radio Mondiale), which can be demodulated using the software from the Fraunhofer-Institut.

The frequency range 1.8 to 50 MHz is valid only for the transmit mode.


Technical Data

Frequency Range Receiver

12 kHz – 60 MHz

Frequency Range Transmitter

160 meter - 6 meter

w/o amplifier with attenuator 10 dB

MDS

-90 dBm

Dynamic Range

82,5 dB

Intercept 3. Order

28,5 dBm

with amplifier 20 dB w/o attenuator

MDS

-109 dBm

Dynamic Range

78,5 dB

Intercept 3. Order

9 dBm

Required PC Configuration

Supported Operation Systems

 Windows XP
Windows 2000
Processor Minimum 800 MHz or better
Memory Minimum 512 MB RAM

Supported Soundcards

 Turtle Beach Santa Cruz (PCI)
SB Audigy (PCI)
SB Audigy2 (PCI)
SB Audigy2 ZS (PCI)
SB Extigy (USB)
SB MP3+ (USB)
M-Audio Delta 44 (PCI)
PreSonus Firebox (FireWire)
The values were measured at 2 prototype boards. A Soundblaster Audigy2 ZS (PCI) Soundcard was used.


Prices


 Price incl. VAT Price w/o VAT
PCB KDG-SR100 600,95 Euro 505,00 Euro
Cable Set for PCB KDG-SR100 39,98 Euro 33,60 Euro
Stainless Steel Cabinet KDG-01 with
  • 13,6 V Power Supply
  • cable Set including all connectors
    		•  145,18 Euro 122,00 Euro
    All Prices plus postage.


    Availability

    KDG-SR100, PCB
    Now available

    Cable Set for PCB
    Now available

    KDG-01, Stainless Steel Cabinet with cable set and 13,6 V power supply
    Now available

    These products can be ordered now.

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