All LPF parts use 100v c0g/np0 capacitors. Use genuine Omron original magnetic latching relays. Use op amp chip with lower noise than LM4562. The usdx+ update is as follows.Moved the headphone and power key/microphone jacks to the front panel for easy access to the headphone and power button. Move the keys to the bottom of the LCD screen for a larger touch area and a more comfortable keystroke experience. Upgraded built-in speaker effects, double the sound! PCB reserved pads for various upgrades, out of the box, can be used as a template for DIY upgrade learning.
Quickly change qrp cw frequency. Support cw sidetone volume adjustment. Filter dsp filter: 4000, 2500, 1700, 500, 200, 100, 50hz passband.
Function DSP functions: automatic gain control (AGC), noise reduction (NR), Xmit voice trigger (VOX), RX attenuator (ATT), TX noise gate, tx unit control, volume control, dbm/s meter. Sidebar/Carrier Suppression SSSSB transmit: better than -45dbc, imd3 (dual tone) -33dbc, receive: better than -50dbc. Support multi-band support, continuously adjustable 10m within 80m frequency range from 20khz.. Open source firmware, built with arduino ide; allows experimentation, new features can be added, contributions can be shared via github, software complexity: 2000 lines of software-based Vovox code available for fast full control (qsk and half-qsk operations) or rx/ Auxiliary switch tx for external control of ptt/pa output using fully digital tx-delay stage and software based ssb stage transmitter in digital mode (no cat or ptt interface required): controls the phase of the sill si5351 (by switching at 800kbits/s Small frequency changes under i2c) and magnitude of pa (via pwm pa key shaping circuit).
Software-based all-digital SDR receiver stage (optional): The I/Q (complex) signal is sampled from a quadrature sampling detector digital mixer and a 90 degree phase shift is performed mathematically in software (Hilbert transform) and three independently switchable analog faders (0db, -13db, -20db, -33db, -53db, -60db, -73db) from the pre-receiver by adding Atten sidebands. Receiver noise floor mds: -135dbm at 28mhz (200hz bw).Receiver receiver front-end selectivity: +/-2khz steep 45db/decade tuning frequency rolling. Blocking blocking dynamic range: 20khz offset 123db, 2khz offset 78db. Vvfo a/b + rit and split, and the corresponding relay through i2c. Cat supports cat with filter switch (using kenwood TS-480 protocol). Type: hf qrp sdr transceiver.
RF output: 10w max at 13.8v dc output at. 4 x Machine Foot Pads. We will sent you pre-paid return envelop so you can return it back to us. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Transceivers". The seller is "reachmall-03" and is located in this country: US.
This item can be shipped to United States.