8 Band USDX USDR QRP SDR Transceiver SSB/CW Transceiver Shortwave Transceiver EU Plug

8 Band USDX USDR QRP SDR Transceiver SSB/CW Transceiver Shortwave Transceiver EU Plug Popis

Function List: Eer e-level drives the ssb transmitting stage. 13.8v power supply about 10w ssb pep output. Support full modes: usb, lsb, cw, am and fm-dsp. Filter: 4000, 2500, 1700, 500, 200, 100, 50hz passband. DSP function: automatic gain control (agc), noise reduction (nr), voice trigger, voice trigger xmit, attenuator rx (att), tx noise gate, tx drive control, volume control, and dbm/s-meter
Ssb reverse sideband/carrier suppression transmission: better than -45dbc, imd3 (dual tone) -33dbc; reception: better than -50dbc. Support multi-band. Continuously adjustable in the 160m-10m frequency range (loss of 20khz performance)..99mhz. Open source firmware, built in ide; allows experimentation, can add new functions, can share contributions through github, software complexity: 2000 lines of code
SSB transmitter phase is completely based digital and software: control the phase of the si5351 PLL (through small i2c frequency changes over 800kbit/s) and the amplitude of the PA (through pwm to pwm) to test the microphone input and reconstruct the SSB signal.
Key shaping circuit PA). All-digital and software-based SDR receiver stage (optional): I/Q signal (complex) is sampled from the quadrature sampling detector digital mixer, and perform 90 degree phase shift (Hilber transform) software in it and delete sidebands by adding. Three switchable analog controllers independent of the front receiver. 0db, -13db, -20db, -33db, -53db, -60db, and -73db. Mds receiver noise level: -135dbm (200hz bw) at 28mhz
Pre-receiver selectivity: steep frequency adjustment -45db/ ten times roll-off +/- 2khz. Blocking dynamic range: 20khz offset 123db, 2khz offset 78db. CW decoder, direct/iambic-a/b keying-Vfo a/b + rit and frequency division, and the corresponding relay with filter through i2c-Cat support (TS480 subset), which can be streamed through CAT transmission o