> ## Documentation Index
> Fetch the complete documentation index at: https://docs.solidyne.ar/llms.txt
> Use this file to discover all available pages before exploring further.

# Operation

> General operational considerations for D612

## Introduction

The console controls are organized into several sections according to their function:

* Input channels
* Telephone hybrid control
* Studio monitoring and talkback
* Preview monitoring (CUE)
* Microphone equalizers
* Level and compression indicators

## Microphones

* **MIC 1 and MIC 2:** handle microphone signals only
  * **48V** phantom power is activated globally (all or none)
  * Dynamic microphones can handle 48V DC, so condenser and dynamic mics can be mixed
* Can be assigned to the processing stage (4-band equalizer and compressor)

## Lines

* **Analog lines:** accept balanced (BAL) and unbalanced (LINE) stereo inputs with A/B switching from the panel
* **USB digital channel:** handles one digital input (USB) and one analog stereo input (LINE)
* The USB connection also sends **PGM or REC** outputs to the computer

## VU Meter Bridge

The meter bridge contains LED VU meters that display:

* Program level (peak average)
* Compressor action

## Quick Check

Basic procedures to verify the console is properly connected:

### Signal Input Check

1. Connect a signal source (microphone, USB audio)
   * Select the corresponding input on the used channel (**MIC** or **BAL-LIN**)
   * This is a common source of error in line channels (wrong input selection)
2. Press **CUE** on the channel receiving the signal
3. Raise the **CUE** fader in the monitoring section
   * Audio should be heard through the console speaker

### Sending Signal On-Air

1. Assign **PGM** on the channel to send the signal to the main output
2. Raise the channel fader to the desired level
   * The signal will be sent on-air and displayed on the program VU meters
3. Adjust gain so the normal working position of the main fader is at **-15 dB** (gray zone)