DUAL MODE SDR TRANSCEIVER: STAND-ALONE & PC BASED
FDM-DUO is an SDR transceiver that offers the possibility to operate Stand-Alone like traditional radio or connected to a computer discovering the possibilities provided by the SDR technologies.
Stand-Alone Specifications (updated on February 2019)
Frequency range: 10KHz - 54MHz.
Direct sampling receiver operating @122.88MHz, ADC: LTC2165 16bit.
DDC (Digital Down Converter) made with FPGA Xilinx Spartan 6.
Filters & Std-Alone Demodulator made with ARM STM32F4 microcontroller with floating point unit.
Demodulation: CW, CWR, LSB, USB, AM, FM narrow.
Selectable LSB and USB filters; 1600Hz to 3100Hz with 100Hz step plus 4000Hz, 5000Hz and 6000Hz values.
Selectable AM filters from 2500Hz to 6000Hz with 500Hz step.
Selectable CW filters; 2600Hz, 1500Hz, 1000Hz, 500Hz, 300Hz and 100Hz plus 4 CW peak filters applied after 100Hz filter to obtain an overall filter of 20Hz bandwidth.
Selectable FM filters: narrow, wide and data.
Pitch setting: up to 1kHz with 10Hz step.
Three audio volumes: main, auxiliary and sidetone.
Squelch: off and 10 on levels.
Gain Control: automatic (AGC) and manual, with settable threshold.
Noise Reduction: off and 10 on levels.
Noise Blanker: off and 10 on levels.
Auto Notch: off and 2 on levels.
Supports bands from 160m to 6m.
Modulation and filtering made with ARM STM32F4 and DDS AD9957 with 368.64MHz clock.
Modulation: CW, LSB, USB, AM, FM narrow.
Microphone input (ADC 48KHz@16bit) with selectable gain (+/-12dB). Tx bandwidth selectable. Compression gain settable.
Key and Paddle input for CW operation, supports Iambic A and B, settable CW speed for Paddle, settable CW delay.
Not filtered 0dBm output on SMA connector (can be used as test equipment or as digital RF generator).
Up to 5W output power on all bands plus Max Selection (e.g. 8W@14MHz).
PTT Output to drive external amplifiers.
VFO A and VFO B, with dedicated frequency, step and mode.
200 MEMORIES with dedicated frequency, step, mode and alphanumeric label.
QuickMem feature: up to 20 re-callable memories for band selection (memories 180 to 199).
QuickStep feature: allows to quickly change step without modify VFOs or MEM step.
Tune feature to facilitate antenna tuning with external antenna tuner.
VFO to MEM and MEM to VFO features.
Std-Alone Split feature, VFO A for RX and VFO B for TX.
2 customizable keys (F4 and F5) with various functions: CW message sending, split management, tuning knob lock, CW/CWR choice.
2 frequency entering modes : with step and digit by digit.
Integrated CW decoder.
LCD color programmable with RGB values for the various operating modalities (RX, TX , PC remote control, ...).
All programmable components (ARM RX, ARM TX, Flash for FPGA, User Interface microcontroller and USB controller) are firmware upgradable.
Antenna connectors: RTX SO-239, RX SO-239.
CAT USB control interface with FTDI controller, manages also RTS and DTR signals to transmit.
Proprietary EXTIO Interface to connect accessories.
10MHz Reference Input on SMA connector.
Power supply: 2.1mm DC Plug, 13.8VDC.
RX consumption: typ. 500mA@13.8VDC.
TX consumption: <2.2A@13.8VDC (5W output).
Size: Width 180mm (7.00"), Depth 155mm (6.10") including Knob and connectors or 130mm (5.10") only enclosure, Height 70mm (2.75").
Weight: 1.2Kg (2.4 lb), shipment package 2.2Kg (4.85 lb).
PC mode operation specifications with FDM-SW2 software (updated on February 2019)
Up to 4 simultaneous virtual receivers in single channel mode.
Up to 8 simultaneous virtual receivers in double channel mode.
Dedicated Audio Channel for each virtual receiver.
Dedicated CAT Channel for each virtual receiver.
Supports connection with external programs using Virtual Serial Ports and Virtual Audio Cables.
Selectable IQ USB stream in two main modalities:
- Stand-Alone: 192ksps single channel and 192ksps double channel,
- Remote: 384ksps, 768ksps, 1536ksps, 3072ksps, 6144ksps in single channel mode and 384ksps in double channel mode.
Remote Split operation, VFO A for RX and VFO B for TX. TX frequency and TX mode are managed by FDM-SW2. Play Files feature. CW messages sending feature. Advanced Transmit Feature with Equalizer, VOX, Compressor, and Filtering functionalities.
CW Skimmer integration management (DX Spot visualization & tuning capability).
Direct Digital Modulation using FDM-DUO USB soundcard based on CMedia chipset digitally interfaced with ARM microcontroller.
| FDM-DUO quick guide
| FDM-DUO user manual
| FDM-DUO fimware upgrade manual
| FDM-SW2 software user manual
| FDM-SW2 software