DVDO AVLab TPG 4K Test Pattern Generator Reviewed

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AVLab_TPG.jpgIf DVDO had a slogan, it would probably be something like, "We don't make display devices. We make them better." From video switching to video processing to WirelessHD transmission, the company has a history of providing well-designed video-oriented solutions, for both the consumer and the installer alike. DVDO's latest offering, the $1,299 AVLab TPG, may not have the consumer appeal of the Quick6 HDMI switcher or Air3 WirelessHD adapter, but it will certainly catch the eye of video calibrators and hardcore enthusiasts who just love to test stuff.

The TPG stands for test pattern generator, and that's exactly what this product does. In fact, that's all it does, generating 4K-friendly test patterns that assist with the setup and calibration of the new crop of 4K/Ultra HD display devices. The AVLab TPG is designed specifically to work with calibration software like SpectraCal CalMAN or ChromaPure; through its micro USB port and supplied USB cable, the AVLab TPG links directly to your computer and automatically controls the calibration workflow, pulling up the needed test pattern at the needed stage - which, as any experienced calibrator will tell you, is a far more preferable and reliable process than manually cuing up test patterns off a disc.

The AVLab TPG has a single HDMI 2.0 output to connect to your UHD display, and it supports an output resolution up to 3,840 x 2,160 at 50/60 frames per second. (More specifically, it's a 300MHz output capable of 4K/60 at a 4:2:0 subsampling rate.) That alone makes it a great tool to test whether or not your new UHD display will accept a 4K/60 signal (and if it disables any picture adjustments in the process). It also supports 3,840 or 4,096 x 2,160 at 24fps, among many other supported resolutions.

The AVLab TPG further includes an HDMI 2.0 input that allows you to pass through an HDMI video signal up to 4K/60 or an MHL signal up to 1080p/60, should you wish to access test patterns or demo content stored on other devices. I didn't have another 4K/60 source to pass through, but the AVLab TPG did pass a 4K/24 signal from my Oppo BDP-103 player without issue. An IR receiver port is onboard, and there's even an optical digital audio output to pass through audio from the connected source. I should stress, though, that the AVLab TPG does not include a scaler to upconvert the external source to 4K; it's simply a pass-through device.

AVLab v iScan Duo.JPGFor the on-the-move installer/calibrator, the most appealing aspect of the AVLab TPG may be its form factor. This pocket-sized device measures about 2.5 x 3.5 x 0.75 inches, weighs just two pounds, and can be powered through the aforementioned USB connection. So, if a power outlet isn't conveniently located during a calibration, you can power the AVLab TPG directly from your computer or some TVs' USB ports. I took a photo (see above) of the AVLab TPG sitting beside the DVDO iScan Duo that I normally use during the calibration process, and I think you can easily appreciate the size difference. For the record, the iScan Duo does a lot more than just pass test patterns (it's also a switcher, scaler, and advanced processor), but test-pattern generation is all I generally use it for - plus, the Duo requires a special RS-232-to-USB adapter cable to communicate with my laptop, as it lacks the direct USB control that the new AVLab TPG offers.

In addition to the unit's portable size and USB power, DVDO has included other convenient features that show how much they understand the needs of installers. Two tiny buttons reside on the sides of the generator: one to manually scroll through the supported output resolutions and one to scroll through common test patterns. The physical resolution button is especially handy if, after setting the output resolution to 4K, you attach the generator to a 1080p TV and get no picture. I've already done this twice, and I suspect it will happen many, many more times in the near future. Instead of having to reconnect the TPG to a 4K device to change to a lower resolution, you can just hit the physical button to manually switch to a supported resolution.

One final hard button, to enter a firmware-update mode, is recessed on the side panel. Firmware updates are possible only via USB. The AVLAb TPG comes with a handy little carrying case, with "little" being the key word. The case will hold the AVLab TPG and the USB cable, maybe the power cord, but definitely not the remote.

The IR remote allows you to navigate the onscreen user menu, which is nothing flashy in terms of appearance but is very straightforward and easy to use. Through this interface, you can set output parameters like resolution, color space (RGB 0-255, RGB 16-235, YC444 16-235, and YC422 16-235), and bit depth  (auto, 8, 10, or 12); you can enable HDMI pass-through; and you can check your firmware version. Most importantly, you can enter the Test Pattern menu to scroll the list of available patterns. The remote also includes direct access to some of the most commonly used patterns, as well as four "TPG Cycle" buttons that allow you to browse pattern categories and then look at specific patterns within each category.

For more on the AVLab TPG, including High and Low Points, Competition & Comparison, and Conclusion, go to page two.

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