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Optimizing Calibration With The Spectracal Videoforge Pro



Len Sie ein Bild, das den Spectracal Videoforge Pro in Aktion zeigt, während ein Techniker die Farbeinstellungen auf einem hochauflösenden Display sorgfältig anpasst


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Display calibration is a crucial process in ensuring optimal visual performance of electronic devices. The SpectraCal VideoForge PRO, a pattern generator specifically designed for this purpose, offers advanced features and capabilities to enhance the calibration process. This article aims to provide a comprehensive guide on optimizing calibration with the VideoForge PRO. The article begins by outlining the necessary steps for driver installation and establishing a connection with the Calman software. Subsequently, it explores the various source settings options available in Calman, which are tailored to different display types. Furthermore, the article delves into the specific calibration requirements for HDR10, HLG, and Dolby Vision HDR content, highlighting the importance of accurate settings for each mode. Lastly, it addresses the specialty patterns offered by the VideoForge PRO, emphasizing their role in calibration. By following the guidelines presented in this article, users can effectively harness the capabilities of the SpectraCal VideoForge PRO to achieve optimal display calibration results.

Key Takeaways

  • Install the FTDI USB device driver before connecting the VideoForge PRO to the computer.
  • Properly connect the VideoForge PRO to the computer before launching Calman.
  • Adjust the Calman Source Settings options based on the display type being measured or calibrated.
  • When calibrating HDR content, select the appropriate settings for HDR10, HLG, or Dolby Vision modes.

VideoForge PRO Driver Installation

The first step in optimizing calibration with the SpectraCal VideoForge PRO is to install the necessary FTDI USB device driver, which can be obtained from the Calman Device Driver Pack or the FTDI website, before connecting the VideoForge PRO to the computer. This driver is crucial for establishing a proper connection between the VideoForge PRO and the computer. To ensure successful installation, the VideoForge PRO should be listed in the Device Manager as a USB Serial Port (COMx). Once the driver is installed, the VideoForge PRO can be connected to the Calman computer using a USB cable. This initial setup is essential for the VideoForge PRO to function correctly and provide accurate calibration results.

Calman Connection to VideoForge PRO

To establish a connection between Calman software and the VideoForge PRO pattern generator, it is necessary to launch Calman after properly connecting the VideoForge PRO to the computer. If the VideoForge PRO is plugged in after opening Calman, the user should click the "Find Source" button on the Calman Source Settings tab to connect. On the Calman workflow Hardware Connect page or Source Settings tab, the user should click "Find Source" and select the SpectraCal VideoForge PRO on the dialog that appears. The user should then choose the COM Port listed in the Windows Device Manager (USB Serial Port COMx) and click "Connect". This will establish the connection between Calman and the VideoForge PRO, allowing for accurate calibration and measurement of displays.

Step Action Result
1 Launch Calman after connecting VideoForge PRO to computer Calman software is ready for connection
2 Click "Find Source" button on Calman Source Settings tab VideoForge PRO is detected by Calman
3 Select SpectraCal VideoForge PRO on Find Source dialog VideoForge PRO is selected as the pattern generator
4 Choose the appropriate COM Port listed in Windows Device Manager VideoForge PRO is connected to Calman
5 Click "Connect" Calman establishes connection with VideoForge PRO

Calman Source Settings Options

When adjusting the Source Settings options in Calman, it is important to consider the specific display type being measured or calibrated in order to achieve accurate results. To optimize calibration with the SpectraCal VideoForge PRO, the following options should be adjusted:

  1. Window Size: This option allows for the adjustment of the size of the test patterns displayed on the screen. It is important to choose a window size that is appropriate for the display being calibrated.

  2. Delay: This option allows for the optimization of the test patterns based on the specific characteristics of the display. Adjusting the delay can help improve the accuracy of the calibration.

  3. Pattern Size: This option allows for the adjustment of the size of the test patterns displayed on the screen. It is important to choose a pattern size that is appropriate for the display being calibrated.

By carefully adjusting these Source Settings options, users can ensure that their calibration results are optimized for their specific display type, leading to more accurate and precise calibration.

HDR10 HDR Content Calibration

Adjusting the Source Settings options for HDR10 HDR content on the VideoForge PRO involves selecting the appropriate Color Format, enabling HDR10 with SMPTE ST 2084 as the EOTF, and specifying the Mastering Display Primaries and White Point. The Color Format should be set to RGB Limited 10-bit. For HDR10, the EOTF should be selected as SMPTE ST 2084. The Mastering Display Primaries should be set to P3 and the White Point should be set to D65. Additionally, the Mastering Display Max Luminance and Min Luminance can be adjusted according to the display’s capabilities. Values for MaxCLL and MaxFall should also be specified.

Option Setting
Color Format RGB Limited 10-bit
Mastering Display Primaries P3
White Point D65
Max Luminance Adjust based on display
Min Luminance Adjust based on display
MaxCLL Specify value
MaxFall Specify value

These settings ensure that the VideoForge PRO generates the appropriate HDR10 HDR content for calibration, allowing for accurate and precise adjustments to be made on the display.

HLG HDR Content Calibration

HLG HDR content calibration on the VideoForge PRO involves selecting the appropriate Source Settings options, such as the Color Format and EOTF, to ensure accurate and precise adjustments can be made on the display. To calibrate HLG HDR content, the Color Format should be set to RGB Limited 10-bit. Additionally, HDR10 should be enabled and the EOTF (Electro-Optical Transfer Function) should be set to HLG. These settings will allow the VideoForge PRO to accurately generate HLG HDR patterns for calibration. It is important to note that HLG HDR content calibration requires specific adjustments based on the display being calibrated. Therefore, it is recommended to refer to the display model information for guidance on the Source Settings tab in Calman. By utilizing the appropriate Source Settings options, users can optimize the calibration process and achieve precise and accurate HLG HDR calibration results.

Dolby Vision HDR Content Calibration

For Dolby Vision HDR content calibration on the VideoForge PRO, the user needs to set the Color Format to RGB Full 8-bit and choose the desired Dolby Vision HDR mode: Perceptual, Relative, or Absolute. To further optimize the calibration process, the following steps can be followed:

  1. Set the VideoForge PRO resolution to 1080p for Dolby Vision HDR mode.
  2. Specify the desired Dolby Vision HDR mode for calibration: Perceptual, Relative, or Absolute.
  3. It is important to note that the specialty patterns available in Dolby Vision mode are in SDR format and not Dolby Vision HDR.
  4. Ensure that the display being calibrated supports Dolby Vision HDR and is properly configured to receive and display the Dolby Vision metadata.

By following these steps, users can effectively calibrate Dolby Vision HDR content on the VideoForge PRO, resulting in accurate and optimized display performance for an enhanced viewing experience.

Specialty Patterns

In Dolby Vision mode, the VideoForge PRO offers a range of specialty patterns that can be displayed on the TV screen, providing additional visual enhancements to the calibration process. These specialty patterns are designed to assist in fine-tuning the display settings and optimizing the overall picture quality. However, it is important to note that these specialty patterns are in SDR (Standard Dynamic Range) and not in Dolby Vision HDR (High Dynamic Range). Despite this limitation, they still serve as valuable tools for calibration and can be used to adjust various aspects such as brightness, contrast, color accuracy, and gamma levels. By utilizing these specialty patterns, users can ensure that their Dolby Vision content is displayed with utmost precision and accuracy, delivering an enhanced viewing experience that showcases the full potential of the display technology.


Tags are a feature associated with the VideoForge PRO pattern generator that allows users to categorize and organize their calibration settings and configurations for easy reference and retrieval. With the use of tags, users can assign specific labels or keywords to their calibration settings, such as display type, calibration mode, or specific display models. This enables users to quickly search and retrieve the desired calibration settings based on their tags, streamlining the calibration process and optimizing efficiency. By utilizing tags, users can easily manage and access their calibration configurations, ensuring consistency and accuracy in their calibration procedures. This feature enhances the user experience and facilitates the organization of calibration settings, contributing to a more efficient and effective calibration process.

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