Usdr Usdx + V2 Plus 8 Band SDR Full Mode HF SSB QRP High Frequency Transceiver, Spec: No Power Supply

Functions

1. 8v power supply, can achieve 8-stop 3-5w power, and reserve the necessary sot-223 and To-220 pack pad for upgrading. High launch efficiency. KDS high precision tcxo brand, frequency accuracy above 1ppm, frequency stability above
2. 5ppm. Ultra-small size: 88x39x124mm (without bulge). Rich interfaces (cat, ptt out, mic/key, k-head mic). All LPF components use 100v c0g/np0 capacitors. Using op-amp chips are lower than those of lm4562 noise. A built-in speaker with a cavity. BNC antenna interface. Explanation. Support full mode: usb, lsb, cw, am, fm (ssb mode reception effect is good, but the transfer effect is poor. AM and FM mode is free, the effect is not good). Filter DSP filter: 4000, 2500,1700,500,200,100,50 Hz passband. Function DSP function: automatic gain control (AGC), noise reduction (NR), XMIT Voice Trigger (Vox), RX attenuator (Att), TX Noise Gate, TX unit control, volume control, DBM/S instrument. Sidebar/carrier suppression SSSSB emission: superior to -45dbc, IMD3(dual tone) -33dbc, receiver: superior to -50dbc. Support for multi-band support, in the 80m frequency range of continuous adjustable 10m (from 20khz. 99mhz, loss performance). Open source firmware, built using Arduino IDE; allows experimentation, new features can be added, contributions can be shared via github, software complexity: 2000 lines based on. The software vovovox code can be used for fast complete control (qsk and semi-qsk operations) or RX/auxiliary switch TX to be used in digital mode (no cat or PTT interface is required). The PTT/PA output is externally controlled by the all-digital tx-delay stage and the software-based SSB stage transmitter: the phase of sill SI5351 is controlled (by a small frequency change i2c at 800 kbits/s) and the PA amplitude is controlled (by a pwm pa key shaping circuit). Software-based all-digital SDR receiver level (optional): sampling of I/Q (complex) signals from a digital mixer with an orthogonal sampling detector, and mathematically perform a 90-degree phase shift (David Hilbert transform) in the software by adding an Atten sideband. Three independent switchable analog pushers (0db, -13 db, -20 db, -33 db, -53 db, -60 db, -73 db) from the front receiver. Receiver background noise mds: -135 DBM at 28 mhz (200 hz bw). Receiver receiver front-end selectivity: +/-2 khz scrolling at steep 45 db/decade tuning frequency. Blocking dynamic range: 20khz offset 123db, 2khz offset 78db. CW decoder, direct/iambic-a/B keying. VVFO A/B + RIT and split, and the corresponding relays pass through i2c. The CAT supports cat with a filter switch (using the kenwood TS-480 protocol). Package includes:. 1 x transceiver. 1 x the microphone. 1 x charger. 4 x machine floor Mats