PERSEUS22 4-Channel Direct Sampling Receivers offer advanced, valuable capabilities such as dual continuous frequency coverage from 10 kHz to 225 MHz with typical image rejection greater than 70dB. Featuring excellent dynamic range on four independent receivers, two VLF-HF and two VHF, each receiver has a dedicated SMA female antenna input. All four receiver channels are synchronously sampled by a high signal to noise ratio (s/n or SNR), 14-bit A/D converter and processed by a software defined digital down converter and FPGA implementation. The four dedicated output channels are routed to the host PC via the USB 3.0 controller, achieving synchronized true diversity reception and wide bandwidth IF applications. Supported modes are AM, LSB, USB, CW, CWrev, RTTY, RTTYrev, FM, WFM (RDS in development), SAM, QSAM, DAB+ and IQ. Presently available sample rates are 250, 500, 1000 and 2000 kSps, with the maximum span currently displayed at 1600 kHz.

The frequency coverage of the PERSEUS22 is split-up into two pairs of independent receiver channels (slices), two for the VLF-HF frequency range of 10 kHz to 70 MHz, and two for VHF range from 70 MHz to 225 MHz. Each pair is capable of diversity processing, which can reduce noise by orders of magnitude. All channels include an analog RF front end equipped with attenuators, preselection filters and amplifiers. The receiver enclosure is machined from solid aluminum and finished with a fine, non-reflective black surface treatment.

PERSEUS22 SDR multichannel software was created by a team formed by Elad and Microtelecom developers, with years of experience in developing software for Digital Signal Processing (DSP). This software takes advantage of an agile GUI interface platform, integrating past DSP design experience to accommodate future modules for demodulators and decoders. This advanced software features a simple and intuitive graphical user interface, simultaneously efficient and complete. The GUI is built using OpenGL, making it possible to leverage the GPU for everything related to the rendering of controls and windows. This allows the CPU to be tasked exclusively with digital processing of the radio signals, to offer revolutionary receiving features and capabilities. Presently this is a Windows software application. Thanks to the libraries used, Perseus22 management software can be implemented on other operating systems such as Linux, MacOS and even Android, with little effort.

PERSEUS22 Included Accessories:

• An AC to DC high-quality medical-grade switch mode power supply GSM40A09-P1J (with IEC320-C13 AC power cord), 9 VDC 4.45A output, 80-264 VAC input, IEC320-C14

• USB 3.0 A to B cable, length 78.74 in. (2 m)

• 4 SMA-BNC adapters

Technical Specifications – Perseus22 4-Channel Direct Sampling Receiver

HF Dual Receivers: HF1 & HF2 antenna connectors

• Frequency coverage: 10 kHz - 70 MHz

• Preselection [1]:

• LPF filter: 10 kHz - 1700 kHz

• BPF filters (MHz): 1.6 - 2.1, 2.1 - 3.0, 3.0 - 4.2, 4.2 - 6.0, 6.0 - 8.4, 8.4 - 12.0,12.0 - 17.0, 17.0 - 24.0, 24.0 - 32.0, 32.0 - 70.0

• Wb (Wideband mode): 10 kHz - 70 MHz

• Attenuators [2]: 0 / 10 / 20 / 30 dB

• Minimum Detectable Signal (MDS): -131 dBm (14 MHz, 2 Msps, CW, BW 500 Hz)

• Input clipping level: -7 dBm (14 MHz, 2 Msps)

• Modes (Software defined): AM, SAM/QSAM, CW/CWr, RTTY/RTTYr, LSB, USB, FM, WFM, IQ

VHF Dual Receivers: VHF1 & VHF2 antenna connectors

• Frequency coverage: 70 - 225 MHz (usable up to 240 MHz)

- Preselection [1]:

• 70 - 112 MHz band

• 112 - 137 MHz band

• 137 - 174 MHz band

• 174 - 225 MHz band (usable as wideband IF)

- Attenuators [2]: 0 / 6 / 12 /18 dB

- Preamplifier gain: 0 or 15 dB

- Switchable DC injection (bias): 5 V +/-5%, 80 mA (for each VHF channel)

- Sensitivity:

• less than -13 dBuV (125 MHz, FM, 12 dB SINAD, 2 Msps, preamp ON),

• less than -12 dBuV (125 MHz, FM, 12 dB SINAD, 0.25 Msps, preamp ON),

• less than -6 dBuV (100 MHz, WFM, 12 dB SINAD, 2 Msps, preamp ON),

• less than -5 dBuV (100 MHz, WFM, 12 dB SINAD, 0.25 Msps, preamp ON)

- Minimum Detectable Signal (MDS):

• 132 dBm (125 MHz, 2 Msps, CW, BW 500Hz)

• -132 dBm (225 MHz, 2 Msps, CW, BW 500Hz)

- Input clipping level: -6 dBm (225 MHz, 2 Msps)

- Modes (Software defined): AM, CW/CWr, RTTY/RTTYr, LSB, USB, FM, WFM, DAB+, IQ.

[1]: each independent receiver channel has its own preselection filters.

[2]: each independent receiver channel has its own attenuators.

General

• Image rejection: better than 70 dB

• ADC sampling rates: 200 or 250 Msps

• DDC sampling rates: 250 Ksps, 500 Ksps, 1 Msps, 2 Msps

• Antenna Inputs: 4 x SMA female; HF1, HF2, VHF1, VHF2

• PC interface: 5 Gbit/s via USB 3.0 port

• Power requirement: 9 VDC, 2A via 2.1 x 5.5mm connector, center positive

• Operating temperature range: 0 - 40 °C

• Dimensions, AL chassis, feet incl. (WHD): 8.456 x 1.732 x 8.661 in. (215 x 44 x 220 mm)

• Weight, w/o power supply: 3.7 lbs. (1.68 kg)

PERSEUS22 System Requirements

PERSEUS22 software is a 64-bit program that uses OpenGL libraries. Supported operating systems are presently Windows 10 and Windows 11, which are all 64-bit versions. Future releases or third-party software will become available soon for IOS, Linux and others. A computer with a USB 3 port (Type-A or Type-C connector) is required to operate the PERSEUS22. Note that the Perseus22 is shipped with a USB 3 cable with a Type-A connector, but a USB 3 C-A adapter can be used to connect the Perseus22 to a USB 3 port with a Type-C connector. Recommended configuration: 9th generation Intel Core i5 processor or higher (or equivalent, for example: AMD Ryzen 5), 16GB of RAM. Minimum configuration: 7th generation Intel Core i3 processor (or equivalent, for example: AMD Ryzen 3), 8GB of RAM. The processor used must support AVX2 Instruction Set Extensions.

The importance of mid-range gaming capable graphics card (GPU) should not be underestimated (whether it is integrated or dedicated). The use of a computer with a high-speed GPU is important, as the PERSEUS22 software uses graphics libraries that take advantage of the better graphics card (GPU), which frees up the processor (CPU) to do the FGPA SDR work.

A configuration lower than the minimum one can be used but considering (1) the use of other programs in conjunction with the PERSEUS22 software and (2) the ever-increasing demand for resources by operating systems, the choice is not recommended.