sdrangel/plugins/samplesource/fcdpro
..
CMakeLists.txt
fcdprogui.cpp
fcdprogui.h
fcdprogui.ui
fcdproinput.cpp
fcdproinput.h
fcdproplugin.cpp
fcdproplugin.h
fcdprosettings.cpp
fcdprosettings.h
fcdprothread.cpp
fcdprothread.h
fcdprowebapiadapter.cpp
fcdprowebapiadapter.h
readme.md

readme.md

FunCube Dongle Pro input plugin

Introduction

This input sample source plugin gets its samples from a FunCube Dongle (FCD) Pro device.

Interface

The top and bottom bars of the device window are described here

FCD Pro input plugin GUI

1: Common stream parameters

Remote source input stream GUI

1.1: Frequency

This is the center frequency of reception in kHz.

1.2: Start/Stop

Device start / stop button.

  • Blue triangle icon: device is ready and can be started
  • Green square icon: device is running and can be stopped
  • Magenta (or pink) square icon: an error occurred. In the case the device was accidentally disconnected you may click on the icon, plug back in and start again.

1.4: Stream sample rate

Baseband I/Q sample rate in kS/s. This is the device sample rate (4) divided by the decimation factor (6).

2: Local Oscillator correction

This is the correction to be applied to the local oscillator in ppm.

3: Auto correction options

These buttons control the local DSP auto correction options:

  • DC: auto remove DC component
  • IQ: auto make I/Q balance. The DC correction must be enabled for this to be effective.

4: Decimated bandpass center frequency position relative to the FCD Pro center frequency

  • Cen: the decimation operation takes place around the FCD Pro center frequency Fs
  • Inf: the decimation operation takes place around Fs - Fc.
  • Sup: the decimation operation takes place around Fs + Fc.

With SR as the sample rate before decimation Fc is calculated as:

  • if decimation n is 4 or lower: Fc = SR/2^(log2(n)-1). The device center frequency is on the side of the baseband. You need a RF filter bandwidth at least twice the baseband.
  • if decimation n is 8 or higher: Fc = SR/n. The device center frequency is half the baseband away from the side of the baseband. You need a RF filter bandwidth at least 3 times the baseband.

5: Decimation factor

The I/Q stream from the FCD Pro ADC is downsampled by a power of two before being sent to the passband. Possible values are increasing powers of two: 1 (no decimation), 2, 4, 8, 16.

6: Transverter mode open dialog

This button opens a dialog to set the transverter mode frequency translation options. The details about this dialog can be found here

7: Set default values

Use this push button to force default reasonable values for all parameters below (8)

8: Parameters

This panel lists all parameters that are the same as in the Windows utility interface showing the block diagram of the FCD:

FCD Pro parameters

  • LNA Enh: equivalent of the "LNA enhance" parameter
  • Band: equivalent of the "Band" parameter
  • Bias: equivalent of the "Bias current" parameter
  • Mode: equivalent of the "IF gain mode" parameter
  • LNA G: equivalent of the "LNA gain" parameter
  • RF filt: equivalent of the "RF filter" parameter
  • Mix G: equivalent of the "Mixer gain" parameter
  • Mix filter: equivalent of the "Mixer filter" parameter
  • Gain1: equivalent of the "IF gain 1" parameter
  • RC filt: equivalent of the "IF RC filter" parameter
  • Gain2: equivalent of the "IF gain 2" parameter
  • Gain3: equivalent of the "IF gain 3" parameter
  • Gain4: equivalent of the "IF gain 4" parameter
  • IF filt: equivalent of the "IF filter" parameter
  • Gain5: equivalent of the "IF gain 5" parameter
  • Gain6: equivalent of the "IF gain 6" parameter