ColibriDDC with Band Pass Filter

ColibriDDC Main capabilities

• ADC with sampling frequency 125 MHz and 14 bit resolution
• Two independent receiving channels with sampling bandwidth up to 312 kHz
• Record frequency spectrum up to 312 kHz for later analysis
• Receive up to 800 MHz in Nyquist zones (additional external filters needed)
• Wide spectrum scope, up to 60 MHz
• 24 bit audio – DAC for short audio delay
• 7 open collector outputs for control of antenna switches, band pass filters or other accessories.
• Mute input for using as external RX with a transmitter or transceiver
• Control by Optional E-coder hardware controller
• LAN interface with PC – 100 Mbps
• Internet remote control (under development)
• Low power consumption, 5V/0.64A
• External reference generator input 10 MHz
• Small dimensions W 64 x H 24 x L 112 mm

Application field

• Dual channel HF receiver
• Panadapter to classic transceivers
• Dual band CW Skimmer (read application note)
• Remote receiver for contests, DXing and other applications
• Spectrum analyzer with wide spectrum scope up to 60 MHz

Software
The ExpertSDR2 software package is used to control the ColibriDDC receiver. The software provides two independent receiving channels with up to 312 kHz bandwidth. It comes with a preloaded database of broadcast stations which together with the ability to record entire broadcast bands for later playback makes it an excellent choice for broadcast DXers. ExpertSDR2 runs under Windows XP/7/8 x32 or x64 and Linux Ubuntu x64. Minimum hardware requirement is Intel Core2Duo, video card supporting OpenGL 1.5 and RAM 256 or more RAM.

Block Diagram

• REF – connector to connect external 10 MHz generator
• PLL – ADC clock frequency synthesizer
• ATT – attenuator
• MCU – microcontrol unit
• Ant – connector to connect the HF band antenna
• TCXO – inbuilt temperature compensated crystal oscillator
• ADC – high speed analog-digital converter
• DAC – audio digital-analog converter
• EXT CTRL – connector for controlling the external devices
• LPF – input low frequency filter (disabling)
• FPGA – field programmable gate array
• LAN – local network connector
• PHONES – jack for connecting headphones
• Front – front panel
• Rear – rear panel

ColibriDDC Specifications

* – with a help of the external software can be supported a larger amount of modes