uSDX_ATU:1. uSDX: HF QRP SDR Transceiver: uSDX is optimized and modified based on Guido PE1NNZ's open source project uSDX/QCX-SSB. uSDX is a shortwave QRP SSB/CW transceiver. With 1602 LCD screen and ultra-small size, it is easy to carry.Open source address: https://github.com/threeme3/QCX-SSB.Discussion group: https://groups.io/g/ucx/topics 

2. ATU: (Automatic Antenna Tuner Unit):Automatic Antenna Tuner Unit is a miniaturized clone of David Fainitski, N7DDC's infamous 7X7 ATU100 automatic antenna tuner unit adapted for QRP operation up to 10 watts. 

uSDX_ATU Performance Characteristics:1. uSDX:8 bands: 3.5MHz; 5.3MHz; 7MHz; 10MHz; 14MHz; 18MHz; 21MHz; 29MHz. Emission efficiency: higher than 85% ( 3.5MHz; 5.3MHz; 7MHz; 10MHz; 14MHz); higher than 80% (18MHz and 21MHz); higher than 70% for 29MHzConnect to PC, use FT8, JS8, FT4 and other digital mode software control, support CW automatic decodingIt can reach 3-5W power in 8 bands and can freely upgrade the PA module (TO-220). 

High-precision TCXO for KDS, frequency accuracy better than 1PPM, frequency stability better than 0.5PPM.Independent core board, RF PA board and ATU board to avoid own signal interference.Ultra-small size: 100 x 90 x 57mm/3.9 x 3.5 x 2.2inch (without protrusions). All LPF parts use 100V C0G/NP0 capacitors. Use LM4562 or LM833 or LT6231 op amp chip. Rich interfaces: HEADPHONE, PTT OUT, MIC/PTT, SPK/MIC 

BNC antenna interface (with BCN-SL16 adapter, easy to match antenna).External power supply: 12.6VDC (13.8VDC power adapter) 

2. ATU: 

Maximum tuning inductance: 8.42µH 

Minimum tuning inductance: 0.05μH 

Maximum tuning capacitance: 1869pF 

Minimum tuning capacitance: 10pF 

uSDX_ATU System Functions: 

Full mode support: USB, LSB, CW, AM, FM 

All-digital and software-based SDR receive channels 

All-digital and software-based SSB transmit channels 

Receive attenuator: 0dB, -13dB, -20dB, -33dB, -53dB, -60dB, and -73dB 

DSP filter bandwidths: 4000, 2500, 1700, 500, 200, 100, and 50 Hz 

Receiving background noise: -135dBm at 28MHz (BW=200Hz) 

Receiver Front-End selectivity: Tuning frequency -45dB/decade roll-off +/2kHz 

SSB/carrier suppression: transmit, better than 45dBc; receive, better than 50dBc 

DSP functions: Automatic Gain Control (AGC), Noise Reduction (NR), Voice Triggered Xmit (VOX), RX Attenuator (ATT), TX Noise Gate, TX Drive Control, Volume Control, dBm/S meter 

Three-Layer PCB: 

ATU-board 

PA-board: 8 band 

Mainboard 

Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on 

Colour:black 

Material:plastic 

Package Contents: 

1 x Main Unit uSDX_ATU 

1 x 12.6VDC Power Adapter (or 13.8VDC) 

1 x BNC-SL16 Adapter 

1 x BNC-BNC Cable 

1 x Handheld Microphone (including MIC, PTT, SPEAKER functions) 

Only the above package content, other products are not included. 

Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.