RFSpace SDR-IQ ontvanger

The US company RFspace has many years of experience in designing SDR equipment. The receiver SDR-IQ presented here is one of the most affordable and most capable SDR systems of it's kind.

The SDR-IQ is a receiver for frequencies from 500Hz (Hz, not kHz!) up to 30MHz, but it can also be used as a spectrum analyser or as a pan-adaptor. As one of few systems the SDR-IQ has an open, fully documented software interface, allowing other authors to develop their own programs. Included in the shipment is the reliable SpectraVue software, but you can also use SDR-Radio.com (by the same author as the well known Ham Radio Deluxe) or Linrad (for Linux). The installation is very easy, get up and running in just 5 minutes.

The SDR-IQ uses a direct 14-bit AD conversion with a sample rate of 66.66MHz. This allows a very high resolution bandwidth down to 0.75Hz. A spectrum up to 196kHz wide can be monitored and/or stored to disk for later analysis with full decoding capabilities. The SpectraVue software included with the receiver decodes AM, FM, WFM, USB, LSB, CW, DSB and more. The filter width is freely selectable. Digital Radio Mondial (DRM) can be decoded with the help of the freely available software 'Dream' (not included).

The SDR-IQ receiver is connected by a USB cable to the computer (USB 2.0). Additionally the receiver has a serial port. Here a suitable transceiver or scanner can be connected and controlled by a suitable software (for example with the included SpectraVue software). This enables the use of the SDR-IQ as a true tracking receiver or pan-adaptor. When used in conjunction with a transceiver, a T/R relay switch is recommended to protect the very sensitive Rx input (as with any secondary receiver). The power supply of the SDR-IQ is done over the USB cable, an external power supply is not required.

• Max. viewable spectrum (waterfall) of 196kHz
• Recording and replay of a 196kHz wide segment with full decoding and tuning capabilities.
• Frequenby range from 500Hz to 30Mhz
• Filly documented and open software interface plus Active-X control
• Driver for Windows and Linux available (FTDI FT245)
• Use SDR-IQ with SpectraVue as a network server for access over the internet
• Reliable SpectraVue software included, with full update rights
• Sourcecode examples for your own experiments included
• RS-232 serial control interface for Icom, Kenwood, Yaesu, Elecraft and other transceivers/scanners
• Supports and decodes AM, FM, WFM, LSB, USB, DSB, CW, CWR etc.
• Powersupply by USB, no additional cable, no power supply required

Specifications

★Frequency Range: 500Hz to 30 MHz in 1 Hz steps. (Usable down to 100 Hz)

★Input Impedance: 50 Ohms

★Clipping RF level (Max Gain): -9dBm (Typ)

★Maximum Frequency display BW: 190 KHz

★Sampling Rate: 66.666 MHz

★I/Q Image Rejection: 80 dB+ (Typ)

★MDS (500 Hz): -127 dBm @ 14 MHz

★Input IP3: 15dBm+ (Typ) * Measured with a dither signal

★Voltage: 5 Volts (USB port powered)

★Current Draw: 425 mA

★Connectors: BNC (RF In), USB 2.0, RS-232 (Serial Bi-directional)

★Indicators: Power (Green), Sample (Yellow), ADC Clip (Red)

★Dimensions: 3.75x3.75x1.25 Inches

★Processor: Atmel AT91SAM7S256 w/ JTAG port.

★Analog Demod: AM, WFM, USB, LSB, N-FM, DSB and CW

★Measurements Functions: IQ vs. Time, Power vs. Frequency, Power vs. Frequency vs. Time 3D Surface, Power vs. Frequency vs. Time Spectrogram, Power in BW vs. Time, IQ Phase

★Max FFT Size: 262144 Point

★Max IQ Recording (All BWs): Unlimited to Hardrive.

★Screen Update Rate: 50 FFTs/sec , 190 KHz SPAN @ 100 Hz RBW

★Window Type: Rectangular, Hanning, Hamming, FlatTop, Blackman, Blackman-Harris

★Displayed Average Noise Level dBm/Hz:-133dBm/Hz TYp. 14.200 MHz

★Worst Case Spurious Carriers (Birdies):-80dBfs , -100dBfs (typ)

SPAN IQ DATA RATE Min Resolution Bandwidth

5 KHz 8.138 KHz 0.031 Hz

10 KHz 16.276 KHz 0.062 Hz

25 KHz 37.792 KHz 0.14 Hz

50 KHz 55.555 KHz 0.21 Hz

100 KHz 111.111 KHz 0.42 Hz

150 KHz 158.730 KHz 0.61 Hz

190 KHz 196.078 KHz 0.75 Hz

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