- Written by Chris Heinonen
- Published on 14 February 2011
On The Bench
With the 1 kHz sine wave, there was THD+N of right around 0.01%.
On the 60 Hz, 7 kHz IMD test, the IMD was only 0.0025%, with no second order peak visible.
The 19 kHz, 20 kHz test shows no B-A peak at 1 kHz, with the noise floor around 90 dBV below the peaks.
With most processors and receivers now having video scalers built into them, we're working to add a new set of standard bench tests to see how they handle video. While HDMI video should stay bit-perfect as it moves through the component, it doesn't much of the time for a variety of reasons. To test how the Marantz handled this, I used an Oppo BDP-83 which lets me control the format of data sent over HDMI, as well as the Spears and Munsil Blu-ray for test patterns. The tests used were: Overscan, Whiter than White, Blacker than Black, Luma and Chroma Burst, Luma and Chroma Plate. These test if all the data is being passed correctly, and the results are in the table below.
As you can see, the Marantz passed almost every test except for Chroma information when fed YPrPb data in 4:4:4 format or over component video. Looking at the burst pattern, the vertical lines of the highest resolution color data were missing, and on the zone plate the edges of the screen were dark, once again showing that this information is missing. With 1080i component video signals, the left 3 pixels were also being cropped and there was a 3 pixel wide black bar on the right side of the screen instead.
Marantz has been informed of the situation and has duplicated the results in their labs, and I'm awaiting their resolution for the issue. For devices that you can control, I would not send 4:4:4 data to the Marantz. Some devices output 4:4:4 over HDMI and can't be adjusted and these will be losing some fine detail in color which is a problem, and hopefully one that Marantz can fix with a firmware update.
We also tested the video scaler by feeding 1080i content, outputting 1080p and using the following patterns: 2:2 and 3:2 cadence, jaggies, and mixed film + video (both horizontal and vertical). In the chart below you can see that the Marantz passed all of these. In my regular TV viewing I would sometimes see the 2:2 pulldown lose its cadence lock on the ticker on ESPN, but it would quickly regain the lock in all of those cases.