AVT2970 A

SDR receivers for 'lower' amateur bands up to 50MHz can be performed in two ways. The simpler is the traditional frequency transformation, which lies within the scope of work of classic SDR receivers. Much more interesting (and more reliable) is the use of specialized I / Q demodulator systems or their counterparts with discrete elements. This set is a classic radio receiver in SDR technology, without intermediate frequency tracks, using a specialized integrated circuit. This results in very high simplicity, ease of commissioning and a relatively low price.

The device is especially recommended for amateurs working in the 2m band

Selected parameters:

• asymmetrical receiver input, impedance approx. 200
• work with CW, SSB, NBFM and AM modulations
• integrated LT / IQ receiver type LT5517
• simple tuning
• output amplifiers on NE5532 (connection to a computer)
• cooperation with software for receiving SDR, eg PowerSDR
• power supply - 12Vdc
• in the set, printed circuit boards and documentation
  
  Detailed description in
  EdW 02/11