FunCube Dongle Pro+ input plugin

Introduction

This input sample source plugin gets its samples from a [FunCube Dongle (FCD) Pro+ device](http://www.funcubedongle.com/?page_id=1073).

Interface

![FCD Pro+ input plugin GUI](../../../doc/img/FCDProPlus_plugin.png)

1: Common stream parameters

![Remote source input stream GUI](../../../doc/img/RemoteInput_plugin_01.png)

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 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](../../../sdrgui/gui/transverterdialog.md)

7: LNA toggle

This checkbox is used to toggle the LNA on/off

8: Mix toggle

This checkbox is used to toggle mixer amplifier on/off

9: Bias tee

Use this checkbox to activate the bias tee.

10: If gain

Use this slider to adjust the gain of the IF amplifier.

10: RF filter

This controls the tuner filter (band) used:

11: IF filter

Selects the IF filter bandwidth