# Source Signal

The Source Signal scope displays a live preview of the input video. It doubles as the primary inspection tool — zoom into pixels, read colour values, reveal faint neutral casts with Chroma Boost, overlay zebras and focus peaking, isolate channels, and compare snapshots.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-3197871c2787a1efae151b1a27a1cdc7cdd4ec01%2F2026-02_source-signal.jpg?alt=media" alt=""><figcaption><p>Source Signal scope with color picker pins</p></figcaption></figure>

## Zoom & Pan

Zoom up to **15×** and pan freely across the image — the same controls used in professional image editors.

| Input                       | Action                          |
| --------------------------- | ------------------------------- |
| **Mouse wheel**             | Zoom in/out (centred on cursor) |
| **Space + Left-click drag** | Pan the zoomed view             |
| **Middle-click**            | Reset zoom to 1× and centre     |

A **mini-preview** thumbnail appears in the top-right corner while zoomed, showing a yellow rectangle for the current viewport. Toggle it with the **Show zoom preview** setting.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-d9bf031e61fa77ad8e243d4d11f002974518afe4%2F2026-02_source-signal-zoom-pan.jpg?alt=media" alt=""><figcaption><p>Zoomed view with mini-preview thumbnail</p></figcaption></figure>

Zoom & Pan is also available in the [False Color](https://docs.timeinpixels.com/nobe-omniscope/scopes/false-color) and [Skintone Scope](https://docs.timeinpixels.com/nobe-omniscope/scopes/skintone-scope).

## Channel Isolation

Solo individual colour channels for quick inspection of noise, spill, or exposure per channel.

| Channel                | Description                           |
| ---------------------- | ------------------------------------- |
| **RGB**                | Full colour (default)                 |
| **Red / Green / Blue** | Single channel displayed as grayscale |
| **Luma**               | Luminosity (Rec. 709 weighted)        |

When a mask is active, the **Draw masks in RGB** option forces the mask overlay to display in full colour even when a single channel is soloed.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-a4dafccfcd97651b4b2abd5105eecb34ecff3c0d%2F2026-02_source-signal-channels.jpg?alt=media" alt=""><figcaption><p>Blue channel isolation</p></figcaption></figure>

## Color Picker

Hold **Alt** to activate the colour picker, or enable **Always show** in settings. Click to place persistent **colour pins** (up to 30) anywhere on the image.

| Input                                       | Action                                                                                               |
| ------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| **Alt** (hold)                              | Show colour picker                                                                                   |
| **Click** (with picker)                     | Place a colour pin                                                                                   |
| **Shift + Click**                           | Copy HEX value to clipboard                                                                          |
| **Ctrl + Click**                            | Add value as a [global target](https://docs.timeinpixels.com/nobe-omniscope/features/global-targets) |
| **Middle-click** or **Double-click** on pin | Remove pin                                                                                           |

### Picker formats

RGB 8-bit · RGB 10-bit · RGBY · RGB float · HEX · CMYK · HSV · Nits

### Picker options

| Setting                | Description                                      |
| ---------------------- | ------------------------------------------------ |
| **Source**             | Input Source, Rescaled Source, or Working Signal |
| **Sampling area**      | 1×1, 3×3, 5×5, 7×7, or 9×9 pixels                |
| **Monochromatic**      | Render picker overlay in grayscale               |
| **Show on hover only** | Hide the readout until the pointer moves         |

## Data Analyser

A **17×11 pixel grid** that shows individual code values around a chosen position. Drag to reposition the analyser area on the image.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-1eb3f2f3db12188d99bf5ec9cfef1ad468c223ed%2F2026-02_source-signal-data-analyser.jpg?alt=media" alt=""><figcaption><p>Data Analyser showing 10-bit code values</p></figcaption></figure>

| Setting       | Description                                                 |
| ------------- | ----------------------------------------------------------- |
| **Format**    | 8-bit, 10-bit, 12-bit, 32-bit float, Nits, Nits per channel |
| **Source**    | Input Source, Rescaled Source, or Working Signal            |
| **Font size** | Small or large                                              |

The status bar at the bottom shows the video data type (RGB/YCbCr), format, line number, and sample number.

See also: [Data Analyser (QC)](https://docs.timeinpixels.com/nobe-omniscope/qc/data-analyser)

## Focus Peaking

Edge-detail overlay that highlights in-focus areas. Requires **Live Pack**.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-e3f0f41c36d3cc039fce209f24a43fa37ebea533%2F2026-02_source-signal-focus-peaking.jpg?alt=media" alt=""><figcaption><p>Focus Peaking in Regular mode</p></figcaption></figure>

| Setting         | Description                                                                                                                                |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
| **Mode**        | **Regular** — coloured edges over the image · **Edges** — enhanced white edges on black · **Enhanced Edges** — binary white edges on black |
| **Threshold**   | Edge sensitivity (0–100 %)                                                                                                                 |
| **Peak colour** | Colour used for the Regular mode highlight (default: red)                                                                                  |

See also: [Focus Peaking (Live Pack)](https://docs.timeinpixels.com/nobe-omniscope/live-pack-add-on/focus-peaking)

## Chroma Boost

Available in version **1.11.33+**.

**Chroma Boost** is a preview-only inspection aid that amplifies subtle colour differences in low-saturation areas. Use it to spot faint green, magenta, or blue contamination in whites, greys, walls, fabrics, skin-adjacent neutrals, and other nearly neutral surfaces.

Unlike a global saturation control, Chroma Boost is strongest near neutral colours and tapers off as saturation increases, so already colourful parts of the image stay more stable.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-74131eefdd635ecec3deb0ed065cd9703d2c347d%2F2026-03_chroma-boost.jpg?alt=media" alt=""><figcaption><p>Chroma Boost amplifies subtle colour differences in near-neutral areas</p></figcaption></figure>

| Setting          | Description                                                                                                            |
| ---------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **Chroma Boost** | Enable or disable the inspection mode. Also available from the Source Signal right-click menu.                         |
| **Amount**       | Controls how strongly low-saturation colours are amplified. Start low for subtle checks and increase only when needed. |

### What it affects

* **Source Signal preview only**
* **Does not** modify the source signal
* **Does not** affect scopes, QC measurements, outputs, or recordings

When enabled, the Source Signal tab shows a **Chroma Boost** status badge so it is easy to see that the viewer is in a temporary inspection mode.

## Zebra Overlays

Diagonal stripe patterns warn about overexposure or illegal saturation levels.

<figure><img src="https://565437294-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MFqn5MuayPgQPMZ9pwf%2Fuploads%2Fgit-blob-54561d720c00bd86593afe99337a13365accd826%2F2026-02_source-signal-zebras.jpg?alt=media" alt=""><figcaption><p>Luma zebra overlay</p></figcaption></figure>

### Luma zebra

| Setting           | Description                                                                                                             |
| ----------------- | ----------------------------------------------------------------------------------------------------------------------- |
| **IRE threshold** | 0 %–110 % (default 100 %). Regions above the threshold show **black stripes**; sub-black regions show **blue stripes**. |

### Saturation zebra

Enable alongside luma zebra for additional saturation warnings:

* Saturation above **70 %** → yellow stripes
* Saturation above **99 %** → orange stripes

## Safe Area Guides

Built-in overlay guides accessible from the scope settings or right-click menu.

| Guide                        | Description                                                                                       |
| ---------------------------- | ------------------------------------------------------------------------------------------------- |
| **Title Safe / Action Safe** | Two concentric rectangles. Default: Title 90 %, Action 95 %. Configurable colour and percentages. |
| **Thirds**                   | Rule-of-thirds grid with configurable colour                                                      |
| **Crosshair**                | Centre crosshair with configurable colour                                                         |

## Custom Overlays

Load **PNG images with alpha transparency** on top of the Source Signal — safe-area guides, framing references, branding, or composition grids. Select the active overlay in the scope settings or from the [Overlays](https://docs.timeinpixels.com/nobe-omniscope/features/overlays) window.

See [Overlays](https://docs.timeinpixels.com/nobe-omniscope/features/overlays) for full details on managing overlays.

## HSL Range Mask

Isolate a hue/saturation/luminance range on the preview. Pixels outside the range are rendered as black.

| Setting        | Description         |
| -------------- | ------------------- |
| **Hue**        | Start/end (0–360°)  |
| **Saturation** | Start/end (0–100 %) |
| **Luminance**  | Start/end (0–100 %) |

Use **Load from mask** / **Save as mask** to sync with the global mask.

## Mask Drawing

Click and drag to draw a mask shape directly on the preview.

| Shape         | Description               |
| ------------- | ------------------------- |
| **Ellipse**   | Draw an elliptical region |
| **Rectangle** | Draw a rectangular region |

Draw modes: **Draw**, **Paint In**, **Paint Out**. A **single line** mode isolates a single scan line.

## Snapshot Compare

When a [snapshot](https://docs.timeinpixels.com/nobe-omniscope/features/snapshots) is loaded, compare it against the live signal:

| Mode                | Description                                          |
| ------------------- | ---------------------------------------------------- |
| **Horizontal wipe** | Vertical divider — **W + drag** to adjust position   |
| **Vertical wipe**   | Horizontal divider — **W + drag** to adjust position |
| **Opacity blend**   | **W + drag** to adjust blend amount                  |

## Blanking Alarm

When [Blanking Detection](https://docs.timeinpixels.com/nobe-omniscope/qc/blanking-detection) is enabled globally, the Source Signal draws coloured bars over detected blanking regions on all four edges, with optional **blinking alert** (1-second cycle).

## Display & Color Management

| Setting                 | Description                                                                  |
| ----------------------- | ---------------------------------------------------------------------------- |
| **Brightness**          | Override global brightness per scope (10–100 %)                              |
| **Monitor ICC profile** | Apply system or custom ICC profile                                           |
| **OCIO colour space**   | Select input and display colour spaces (requires OCIO config in Preferences) |
| **Rotate**              | Rotate the frame 90° CW or CCW                                               |
| **Flip / Mirror**       | Flip or mirror the preview                                                   |

### macOS Quick Presets

| Preset                   | Configuration                      |
| ------------------------ | ---------------------------------- |
| **Match Resolve Viewer** | Rec. 709 preview with tone-mapping |
| **Match NDI Monitor**    | Unmanaged, no ICC, no tone-mapping |

### HDR / EDR (macOS)

Enable **Display HDR** to use Apple EDR output. EDR and HDR badges appear in the top-right corner. Includes PQ (ST.2084) decode with Reinhard extended tone-mapping, luminance white point, and luminance scale controls.

## Keyboard Shortcuts

| macOS         | Windows       | Action                |
| ------------- | ------------- | --------------------- |
| Mouse wheel   | Mouse wheel   | Zoom in/out           |
| Space + drag  | Space + drag  | Pan                   |
| Middle-click  | Middle-click  | Reset zoom            |
| Alt (hold)    | Alt (hold)    | Show colour picker    |
| Shift + Click | Shift + Click | Copy HEX to clipboard |
| Ctrl + Click  | Ctrl + Click  | Add as global target  |

## StreamDeck / Action Editor

| Action                      | Description                           |
| --------------------------- | ------------------------------------- |
| **SourceTogglePeaking**     | Toggle Focus Peaking                  |
| **SourceTogglePeakingLuma** | Toggle Focus Peaking + switch to Luma |
| **ClearAllPins**            | Remove all colour pins                |
| **ToggleLoupe**             | Toggle loupe magnifier                |

## Related

* [Focus Peaking (Live Pack)](https://docs.timeinpixels.com/nobe-omniscope/live-pack-add-on/focus-peaking)
* [Overlays](https://docs.timeinpixels.com/nobe-omniscope/features/overlays)
* [Snapshots](https://docs.timeinpixels.com/nobe-omniscope/features/snapshots)
* [Global Targets](https://docs.timeinpixels.com/nobe-omniscope/features/global-targets)
* [Crop](https://docs.timeinpixels.com/nobe-omniscope/features/crop)
* [Data Analyser (QC)](https://docs.timeinpixels.com/nobe-omniscope/qc/data-analyser)
* [Blanking Detection](https://docs.timeinpixels.com/nobe-omniscope/qc/blanking-detection)