Test Bench

Sound & Vision - - TEST REPORT -

(Some mi­nor changes from the set­tings used for these cal­i­bra­tions were made in the fi­nal view­ing tests. For the con­trol set­tings used in the post-cal­i­bra­tion view­ing visit www.soun­dand­vi­sion.com)

The mea­sure­ments here were made us­ing CAL­MAN (www.spec­tra­cal.com) mea­sure­ment soft­ware, to­gether with Photo Re­search PR-650 and Klein K-10A color me­ters and a test pat­tern gen­er­a­tor from Murideo/avpro (Fresco Six-g).

HD/SDR

FULL-ON/FULL-OFF CON­TRAST RA­TIO: Un­mea­sur­able

In the Cus­tom Pic­ture mode with the Black level con­trol at 50, Bright­ness (back­light) at 5, Con­trast at 90, Gamma at

-2, and Auto lo­cal dim­ming at Medium, the mea­sured peak white level with an

18% white win­dow was 40.7 foot-lam­berts (ft-l) or 135.9 nits. (At the de­fault Bright­ness set­ting of 35, peak white level mea­sured 131 ft-l.) A full black test pat­tern was un­mea­sur­able at cen­ter screen us­ing these set­tings. With lo­cal dim­ming off, the black level rose to 0.019 ft-l for a na­tive full-on/full-off con­trast ra­tio of 2,142:1.

With the above set­tings and Ex­pert 1 Color tem­pera-

ture se­lected, the av­er­age pre-cal­i­bra­tion grayscale

Delta E from 10% to 100% was a max­i­mum of 1.98 at 100%. Af­ter cal­i­bra­tion us­ing only the 2-point grayscale con­trols, the max­i­mum Delta E was 0.61 at 70%. The max­i­mum color Delta E was 2.67 be­fore cal­i­bra­tion (blue) and 1.63 (also blue) af­ter a CMS fine tun­ing. In the -2 set­ting. the gamma ranged from 2.36 at 10% to 2.44 at 70% and 80%.

UHD/HDR

FULL ON/FULL-OFF CON­TRAST RA­TIO: 208,000:1

In the Cus­tom Pic­ture mode with the Black level con­trol at 50, Bright­ness (back­light) at 35, Con­trast at 90, Gamma at 0, Auto lo­cal dim­ming at Medium, Ad­vanced con­trast en­hancer

off, and X-tended Dy­namic Range at High, the mea­sured peak white level with a 10% white win­dow was 1,456 nits. A full black screen mea­sured 0.007 ft-l for the con­trast ra­tio shown above. above. How­ever, for HDR the bulk of the im­age falls be­low 50%, with the re­main­der re­served for high­lights. The out­put at 50% mea­sured 94 nits, so it might be con­strued that a work­ing con­trast ra­tio over most of the set’s us­able bright­ness range would be 94/0.007, or 13,428:1— still a good re­sult. With lo­cal dim­ming off, the black level rose to 0.252 for a full range con­trast ra­tio of 5,778:1 or a work­ing con­trast ra­tio from 0% to 50% of 373:1. Bot­tom line: you’ll clearly want to turn on the XBR- 65Z9F'S lo­cal dim­ming .

With the above set­tings and Ex­pert 1 Color tem­per­a­ture se­lected, the post cal­i­bra­tion grayscale Delta E never ex­ceeded 2.9, with or with­out lu­mi­nance, and the color

Delta E never ex­ceeded 2.5. Lu­mi­nance mea­sured 1,456 nits with a 10% white win­dow, 1,006 nits at 25%, 713 nits at 50%, and 544 nits with 100% full field white. HDR color checker Delta Es mea­sured 1.22 with lu­mi­nance and 1.36:1 with­out lu­mi­nance. The Sony reached 70.6% of BT.2020 (1976 stan­dard) and 92.8% of P3 (1976 stan­dard) color space.

The Sony passed all of our stan­dard video pro­cess­ing tests. With the Game pic­ture mode se­lected, im­age lag mea­sured an im­pres­sive 23.8ms.—

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