Description:
The USDR/USDX is a pocket-sized 8-band SSB/CW QRP transceiver. Designed with a built-in lithium battery, built-in microphone, PTT button, and extremely low RX power consumption, it's a great partner for SOT-232, POTA, or other portable activities.
This QRP SSB/CW shortwave transceiver features a 1602 screen, built-in battery, charger, built-in microphone, and speaker. It can be connected to automatic keypads. It also supports CW decoding.
Features:
1. Using a durable IRF series transmission tube.
2. Can be used to connect an antenna (instrument base).
3. Aluminum shell with laser marking, all aluminum knobs, with translucent silicone knobs.
4. The original QCX circuit is greatly simplified, reducing the number of installed components by 50%. No complicated transformer windings. No wiring procedures. The most cost-effective and easy-to-build
Feature list:
* Eer E-level drives the SSB transmit stage
* 13.8V power supply via 10W SSB PEP output
* Full mode support: USB, LSSB, CW, AM, and FM DSP
* Filters: 4000, 2500, 1700, 500, 200, 100, and 50Hz passband
* DSP functions: Automatic Gain Control (AGC), Noise Reduction (NR), Voice Trigger, Voice Trigger XMIT, RX Attenuator (ATT), TX Noise Gate, TX Drive Control, Volume Control, and dBm/s Meter
* SSB Reverse Sideband/Carrier Rejection Transmission: Better than -45dB, IMD3 (Dual Tone) -33dB; Reception: better than -50dBc
* Multi-band support. Continuously adjustable in the frequency range 160m-10m (20kHz power loss) to 99MHz
* Open-source firmware, built in IDE; allows experimentation, allows adding new features, allows sharing contributions via GitHub. Software complexity: 2000 lines of code
* V-based software can be used for fast and complete rogue operations (QSK and Semi-QSK) or auxiliary execution in digital mode (without CAT or PTT interface) for RX/TX switching, with TX/PA delay control and external PTT output – easy installation and modification, 8 component changes and 8 lines of code
* Lightweight, cost-effective transceiver: Thanks to the electronic liquid-level transmitter, it has high power efficiency (no large heat sink required). and simple design (no need for complex symmetrical linear power amplifiers)
* SSB transmitter phase control is entirely digital and software-based: control the phase of the SI5351 PLL (through small I2C frequency changes over 800 kbit/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): The I/Q signal (complex) is sampled from the quadrature sampling detector digital mixer, and a 90-degree phase shift (Hilber transform) is performed using software, and sideband cancellation is performed by adding a second filter.
* Three switchable analog controllers independent of the front receiver
* 0 dB, -13 dB, -20 dB, -33 dB, -53 dB, -60 dB, and -73 dB
* MDS receiver noise level: -135 dBm (200 Hz BW) at 28 MHz
* Pre-receiver selectivity: steep frequency matching -45 dB/ten times roll-off +/- 2 kHz
* Blocking dynamic range: 20 kHz offset 123 dB, 2 kHz offset 78dB
* CW decoder, direct/iambic A/B keying, VFO A/B + RIT and frequency division, and switching the corresponding relay with filter through I2C CAT support (TS480 subset), which can be used to stream audio, keystrokes, and display text through CAT transmission.
Interface Introduction:
* Charging: Built-in lithium battery charging port. Use only the included charger! The use of chargers from other manufacturers is prohibited.
* Switch: Off. Bat: Built-in battery power supply. 13.8: External power supply
* DC 13.8V/3A: External power supply interface
* Key: Automatic key body connection (A, B, single key)
* PA: External power amplifier, PTT signal
* Mic: External microphone interface
* UART: Serial communication (TS-480 compatible command)
* SPK: External speaker
Package includes:
* 1 x Transceiver
* 1 x Power adapter
* 1 x Microphone
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