SDR-IQ | Rf-Space

Rf-Space » SDR-IQ

PC controlled direct sampling SDR receiver. Frequency range 0.0005-30 MHz all-mode, supports spectrum record/playback up to 196 KHz bandwidth. Ideated in USA.

Reference market : ham-radio

General :
Frequency coverage 0.0005 ~ 30.0000 MHz [1]
Modulation mode CW / LSB / USB / AM / DSB / FM
Tuning step 1 Hz min
Receiver :
Sensitivity CW 0.3 uV (14 MHz, 10dB S/N)
MDS (Minimum Detectable Signal) -127 dBm (14 MHz)
Selectivity user-defined
A/D conversion Freq. 66.666 Msps
Res. 14 Bit
Sampling out 196 Ksps max
IP3 (3rd order intercept point) +15 dB
I/Q Image Rejection 80 dB
Spurious carriers [2] 80 dBfs max
100 dBfs typ
Features :
Memory Unlimited memory channels
Antenna BNC 50Ω connector
Power supply 5 VDC USB
Power consumption 425 mA
Connections USB2.0
Mechanical and environmental data :
Dimensions 95 (W) x 32 (H) x 95 (D) mm

[1] Usable down to 100 Hz
[2] Referenced to ADC max input range

Description :

The SDR-IQ is a direct sampling receiver that uses a 14-bit ADC and an AT91SAM7S256 processor from Atmel. It offers a wide range of possibilities for extended frequency coverage, starting from only 500 Hz and therefore suitable for VLF monitoring, as well as for spectrum analysis functions and signal demodulation options. The information flow of the ADC is processed by a digital converter (DDC) in order to obtain data in I/Q format to be sent to a PC via USB connection. All filtering and demodulation operations are assigned to the softwares, the latest version of SpectraVue (Moetronix) and SDR-Radio.

On the technical side, the receiver integrates a preamplifier, RF attenuators, and a filter bank in the front-end preselector. The applications include, besides the stand-alone apparatus function, the use combined with a second receiver or transceiver for which it performs Panadapter tasks by displaying the spectrum around the intermediate frequency (IF) value which can be freely set by the operator thus comprising standards such as 455 KHz, 8.83 MHz, 10.7 MHz, 21.4 MHz. From the PC you can record up to 196 KHz of the RF spectrum for delayed playback that uses AM, FM, SSB, DSB, CW demodulation by adjusting bandwidth and resolution of the FFT analysis between 2048 and 262144 points. The FFT is performed with a speed of 50 updates per second acting with a span (interval) of 190 KHz and BW (resolution) of 100 Hz. The following table shows the combination of frequency ranges, IQ data flow, and maximum resolution achievable:

Span I/Q data flow Maximum resolution
5 KHz 8.138 Ksps 0.031 Hz
10 KHz 16.276 Ksps 0.062 Hz
25 KHz 37.792 Ksps 0.14 Hz
50 KHz 55.555 Ksps 0.21 Hz
100 KHz 111.111 Ksps 0.42 Hz
150 KHz 158.730 Ksps 0.61 Hz
190 KHz 196.078 Ksps 0.75 Hz

It should be mentioned that the SDR-IQ also has an RS232 serial port to directly interface other receivers, among these different Icom and AOR models such as IC-R8500, IC-R9000, IC-R9500, IC R7000, IC-R7100, AR-5000.

Valuation :

Dynamic range
Spurious response
Signal functions
Control functions
User friendly

Stars: 1=insufficient, 2=just sufficient, 3=mediocre, 4=good, 5=excellent

Review :

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