{"id":44396,"date":"2016-11-22T12:04:00","date_gmt":"2016-11-22T10:04:00","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=44396"},"modified":"2023-09-24T16:10:44","modified_gmt":"2023-09-24T16:10:44","slug":"hobbypcb-rs-hfiq-5w-hf-sdr-transceiver","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/new-equipment\/hobbypcb-rs-hfiq-5w-hf-sdr-transceiver\/","title":{"rendered":"HobbyPCB RS-HFIQ 5W HF SDR Transceiver"},"content":{"rendered":"

\"sdr1\"<\/a><\/p>\n

The receiver in the RS-HFIQ consists of 5 band-pass filters to reject out-of-band signals, an LNA with frequency dependent gain and a conventional quadrature down-converter.<\/p>\n

The transmitter in the RS-HFIQ uses a Quatrature up-converter followed by the same band-pass filters used by the receivers, a 5W power chain and a low-pass filter bank.<\/p>\n

The Local Oscillator is based on a Silicon Labs SI5351 chip that can product up to 3 RF outputs, the LO signal for the up\/down-converter, a built-in test signal for calibrating I and Q offsets and an external signal.<\/p>\n

The control of the SI5351 and all switching functions is provided by an Arduino Nano running open-source software and programmed with the Arduino IDE.<\/p>\n

Special care has been taken to insure noise and ground-loop set-up. The RS-HFIQ has three separate DC isolated ground planes; RF\/Chassis ground, Baseband\/Audio ground and Digital ground. This allows the same PC to be connected to the audio in\/out and the USB port on the Arduino Nano without creating noise\/grounding issues.<\/p>\n

5W not enough power? Add a HARDROCK-50 to your station to boost up to 50W. The RS-HFIQ and HARDROCK-50 seamlessly integrate together for a powerful base station!<\/p>\n

\"rs-hfiq-block-diagram1\"<\/a><\/p>\n

Specifications<\/strong><\/p>\n