USDX USDR SDR Transceiver
All Mode 8 Band HF Ham Radio QRP CW Transceiver
Specification:
1.Support Full Mode: USB, LSB, CW, AM, FM (SSB Mode Has Good Reception, But Poor Transmission. AM And Fm Modes Are Free And Have Poor Results)
2.Filter DSP Filter: 4000, 2500, 1700, 500, 200, 100, 50hz Passband
3.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 Meter
4.Sidebar, Carrier Suppression SSSSB Transmit: Better Than -45dbc, Imd3 (Dual Sound) -33dbc, Receive: Better Than -50dbc
5.Support Multi Band Support, Continuously Adjustable 10m/32.8ft In 80m/262.5ft Frequency Range (From 20khz 99mhz, Lossy Performance)
6.Open Source Firmware, Allows Experimentation, Can Add New Features, Can Share Contributions Via Github, Software Complexity: 2000 Lines Of Software Based Vovox Word Available For Fast Full Control (QSK And Semi QSK Operation) Or RX Auxiliary Switch TX In Digital Mode (No CAT Or PTT Interface Required), Using Fully Digital TX External Control Of The PTT PA Output Using Delay Stage And Software Based SSB Stage Transmitters: Control Of The Phase Of The Sill Si5351 (Via Small Frequency Changes At 800kbits/s I2c) And The Amplitude Of The PA (Via PWM PA Key Shaping Circuitry)
7.Three Independent Switchable Analog Front End Receiver Attenuators: (0dB, -13dB, -20dB, -33dB, -53dB, -60dB, -73dB)
8.Receiver Noise Floor MDS: -135 DBm At 28MHz (200Hz BW)
9.Receiver Front-End Selectivity: Steep -45 DB/Decade Roll Off From Tuning Frequency +/-2 KHz
10-Blocking Dynamic Range: 20kHz Offset 123dB, 2kHz Offset 78dB
11.CW Decoder, Straight Iambic A B Keyer
12.VFO A/B + RIT And Split, And Corresponding Relay Band Filter Switching Via I2C
13.CAT Support (Using for Kenwood TS 480 Protocol)
14.8 Band Coverage: 80m/262.5, 60m/196.9ft, 40m/131.2ft, 30m/98.4ft, 20m/65.6ft, 17m/55.8ft, 15m/49.2ft, 10m/32.8ft
