> For the complete documentation index, see [llms.txt](https://docs.stenoob.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stenoob.com/cat-setup/digitalcat.md).

# DigitalCAT

The **Stenoob Pro 3** and **Pro 4** work with DigitalCAT in either **Gemini PR** (default) or **TX Bolt** mode. Simply select the matching protocol in DigitalCAT.

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### 1. Verify the COM Port

1. Press **Windows + X** and select **Device Manager**.
2. Expand **Ports (COM & LPT)**.
3. Look for **USB Serial Device (COM#)**.
4. If multiple ports are listed, unplug and reconnect the keyboard. The entry that disappears and reappears is your keyboard.
5. Note the **COM#** — you'll use it in DigitalCAT.

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### 2. Configure DigitalCAT

1. Open **Translator → Steno Source**.
2. Under **Primary Steno Device**, select:
   * **Gemini Realtime** if your keyboard is in **Gemini PR** mode (default).
   * **Baron Realtime** if your keyboard is in **TX Bolt** mode.
3. Set **Port 1** to the COM port you identified above.
4. Click **OK** to save.

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### 3. Start Writing

1. Go to **Translator → Start Translation**.
2. Begin writing. Your strokes should now register in DigitalCAT.

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### Notes

> ⚠️ **Protocol**
>
> By default, the keyboard starts in **Gemini PR** mode. DigitalCAT supports both **Gemini PR** and **TX Bolt**. If you'd like to use TX Bolt instead, see the **Toggle Protocol** guide.

> ⚠️ **General**
>
> Only one application can access the COM port at a time. Close other steno software (such as Plover) before connecting to DigitalCAT.