Local output plugin

<h1>Local output plugin</h1>

<h2>Introduction</h2>

This output sample sink plugin sends its samples to a Local Source channel in another device set.

<h2>Interface</h2>

![SDR Local output plugin GUI](../../../doc/img/LocalOutput_plugin.png)

<h3>1: Start/Stop</h3>

Device start / stop button.

  - Blue triangle icon: device is ready and can be started
  - Green square icon: device is running and can be stopped

<h3>2: Frequency</h3>

This is the center frequency in Hz sent from the Local Source channel instance and corresponds to the center frequency of transmission. The sub kHz value (000 to 999 Hz) is represented in smaller digits on the right.

<h3>3: Stream sample rate</h3>

Stream I/Q sample rate in kS/s