USDR USDX SCANNER RECEIVER 8-CHANNEL LCD SDR CW RADIO TRANSMITTER: shortwave QRP SSB CW radio transmitter-receiver, with clear LCD display, support connection to computer, use FT8, JS8, FT4 software and other mode for digital control. REASONABLE DESIGN: The headphones and power button and microphone jack are located on the front panel, making it easy to connect the headphones and power button, with a larger touch area and more convenient key operation. WITH SPEAKER: Improved built-in speaker effect, stable sound and less interference, fast QRP CW frequency change and support CW side volume control. HIGH EFFICIENCY: The transceiver has an 8-band design, covering 80m, 60m, 40m, 30m, 20m, 17m, 15m and 10m frequency, which has high transmission efficiency. OTHER FEATURES: This radio transmitter-receiver has multiple interfaces, with built-in speaker with cavity and BNC antenna interface, and all LPF parts use 100v c0g/np0 capacitors. Specification: Item Type: Radio Transceiver Size: approx. 83 x 38 x 124 mm / 3,3 x 1,5 x 4,9 inches (without protruding parts) Supports all modes: USB, LSB, CW, AM, FM (SSB mode has good reception effect but poor transmission effect. DSP filter: frequency response 4000, 2500, 1700, 500, 200, 100, 50 Hz DSP functions: automatic gain adjustment (AGC), noise reduction (NR), Xmit voice triggering (VOX), RX silencer (ATT), TX noise gate, TX unit control, volume control, dbm/s meter. Sidebar Carrier Suppression SSSSB Transmission: better than -45dbc, imd3 (two-tone) -33dbc, reception: better than -50dbc Multi-band support, smooth 10m adjustment in 80m frequency range (from 20khz to 99mhz, loss performance) Software complexity: 2000 lines of software-based Vovox code can be used for quick full control (QSK operation and half QSK) or RX TX auxiliary switch in digital mode (no cat or PTT interface required),using a fully digital TX delay degree and based on it, the software transmitter class SSB externally controls the PTT/PA output,controlling the si5351 threshold phase (through small changes in i2c frequency at 800kbits/s) and pa amplitude (through the pwm pa keyforming system) Software-based digital SDR receiver stage (optional): The I/Q signal (combined) is sampled from the digital mixer of the quadrature sampling detector, and the 90 degree phase shift is performed mathematically in the software by adding the Atten sideband MDS receiver noise level: -135dbm at 28mhz (200hz bw) Receiver Front End Selectivity: +/-2 kHz Strome 45db/10 years Change tuning frequency Blocking dynamic range: 123 dB at 20 kHz offset, 78 dB at 2 kHz offset List of packages: 1 x transmitter-receiver 1 microphone 1 x Charger 4 x machine foot pads