#NEWS SERVICE RTTY USING FLDIGI GENERATOR#
#NEWS SERVICE RTTY USING FLDIGI SERIAL#

#NEWS SERVICE RTTY USING FLDIGI GENERATOR#

Built-in test signal generator and testing tools.

Connectors: 2.1mm power barrel connector, USB B (for audio and CAT control), BNC RF input/output.

Easy to build single-board design, Professional quality double-sided, through-hole plated, silk-screen printed PCBs.

Si5351A Synthesized VFO with 25MHz TCXO as standard.

#NEWS SERVICE RTTY USING FLDIGI SERIAL#

Built-in USB Virtual COM Serial port for CAT control.High performance embedded SDR SSB receiver with 60-70dB of unwanted sideband cancellation.Solid-state band switching and transmit/receive switching under CAT control.Single signal transmission (zero unwanted sideband, zero residual carrier, zero intermodulation distortion).

5W output at 9V supply (can be built for 4-5W at 12V supply) - note lower power at higher bands e,g.The enclosure includes four self-adhesive feet. The front and rear panels are drilled and cut to match the QDX PCB with laser-etched lettering. The enclosure size is 89 x 63 x 25mm without protrusions. The Optional enclosure is black anodized extruded aluminium, very sturdy and elegant. Many thanks to Ross VK1UN for his extensive and tireless assistance designing and testing filters for the high bands version of QDX (20, 17, 15, 12, 11 and 10m version). QDX is not suitable for on/off keyed modes such as CW because it does not have click-reducing RF envelope shaping furthermore it is not suitable for phase shift keyed modes such as PSK31 or modes involving multiple concurrent tones such as WinLink, This includes everything in WSJT-X, JS8Call, some fldigi modes e.g. QDX is suitable only for single tone FSK modes, which covers the majority of digital modes in use today. QDX transmits a SINGLE SIGNAL, it is not an SSB modulator with associated unwanted sideband and residual carrier, or intermodulation due to amplifier non-linearity. The 'QDX' ( QRP Labs Digital Xcvr): a feature-packed, high performance, five-band (80, 60, 40, 30 and 20m) or six high-HF band (20, 17, 15, 12, 11 and 10m) 5W Digi-modes transceiver kit, including embedded SDR receiver, 24-bit 48 ksps USB sound card, CAT control, synthesized VFO with TCXO reference. QDX: a feature-packed, high performance, five-band (80, 60, 40, 30, 20m) or six-band (high bands 20, 17, 15, 12, 11 and 10m) 5W Digi-modes transceiver kit, including embedded SDR, 24-bit 48 ksps USB sound card, CAT control, synthesized VFO with TCXO reference.

News service rtty using fldigi