A new SDR-receiver from the italian SDR developers community:

low-cost, DDS-less "Software Defined Radio" full coverage receiver for all HF bands, used with powerful software on the PC for multi-mode operation 


- continuously tuning the entire HF-spectrum: standard tuning range: 0,1 - 55 MHz
(some boards delivered after Sept. 2010 works also above the guaranteed upper limit of 55MHz, up to 70 Mhz)
- extendend tuning range up to 165Mhz with reduced sensivity through the 3th harmonic mode

measurments test results (TNX to Eraldo, I4SBX) 

An external preselector is recommended for frequencies below 2MHz and for the 3th harmonic Mode.

- IF amplifier output clipping level: 2,45Vp @ -13dBm RF input level
- IF (I and Q output signal) bandwidth: 155 kHz @ -6dB
- Power supply : 5V / 155mA (+15mA with LCD module)
- USB2.0 interface, only USB powered (no external supply are required)
- high speed divider CYPRESS CY22393/4 (for the tuning range: 0,1 - 2,5 Mhz)
- new low jitter clock generator SILICON LABS Si570 LVDS
- interface for optional LCD
- interface for optional boards (transmitter, preselector ecc.)
- 3 Bandpass filter on board + 1 Lowpass filter on board + filter bypass (broadband input)
- IF-Chain with rail-to-rail OP-AMPS for 5V
- I/Q outputs for PC Sound card
- I/Q optional differential outputs for professional PC Sound cards
- PIC18F4550 Controller with USB-Bootloader
- DLL support trough USB interface for Winrad by I2PHD & PowerSDR-IQ
- PCB: dual layer, 80 x 100mm


PM-SDR  Hardware Block Diagram


The PMSDR2.1x board assembled:

The PM-SDR Receiver  is a 80 x 100mm circuit board that use the PC's USB port (for control and 5V power).


A preassembled kit and more are available on RF-SYSTEM 's webshop.

For other questions please send me an email.




The printed circuit boards design and firmware of the projects on this page are under copyright and remains property of the RF System.
All, except external linked, Material and concepts presented on the PM-SDR website is under Copyright 
These pages are designed and maintained by Martin Pernter,