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HDCP 1.4/2.2/2.3","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"HDMI V2.0 / HDCP2.2 (x2)"}]},{"key":"inputs.max_input_resolution","label":"Max input signal","value":"4096x2160","unit":null,"standard":"ISO/IEC 21118 items 17.1/17.2","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"4096 x 2160 @ 60Hz"}]},{"key":"inputs.scan_freq_h_khz","label":"Horizontal scan frequency","value":[31,135],"unit":"kHz","standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Horizontal scan rate 31 ~ 135Khz"}]},{"key":"inputs.scan_freq_v_hz","label":"Vertical scan frequency","value":[24,120],"unit":"Hz","standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Vertical scan rate 24 ~ 120Hz"}]},{"key":"light.cooldown_s","label":"Cool-down time","value":90,"unit":"s","standard":"Vendor / measured","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"Allow 90 seconds for the projector to cool down"}]},{"key":"light.lamp_watts","label":"Lamp wattage","value":240,"unit":"W","standard":"ISO/IEC 21118 (lamp only)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Lamp watts 240"}]},{"key":"light.life_hours","label":"Light source life","value":{"bright":4000,"dynamic":15000,"eco":10000},"unit":"h","standard":"ISO/IEC 21118 item 7 (time to 50% output)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Lamp life hours (up to) 4000 (Bright), 15000 (Dynamic), 10000 (Eco)"}]},{"key":"light.source","label":"Light source type","value":"lamp","unit":null,"standard":"ISO/IEC 21118 Table 1 item 6","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Light source type Lamp"}]},{"key":"noise.spl_db","label":"Fan noise (sound pressure)","value":{"min":26,"max":28},"unit":"dB(A)","standard":"ISO/IEC 21118 item 20 → ISO 11201 (bystander emission sound pressure)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Noise level (min) 26dB Noise level (max) 28dB"}]},{"key":"observed.ansi_contrast","label":"Measured ANSI contrast","value":200,"unit":":1","standard":"Reviewer (on/off; 4×4 checkerboard)","basis":"measured","mode":null,"conditions":null,"sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"obtained an ANSI contrast of over 200:1"}]},{"key":"observed.delta_e_color_avg","label":"Measured colour ΔE (avg)","value":3.53,"unit":"ΔE","standard":"CIEDE2000 · ITU-R BT.2124 (ΔE ITP)","basis":"measured","mode":"Reference, after calibration","conditions":"White screen","sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"I obtained an average dE of 3.53"}]},{"key":"observed.delta_e_grayscale_avg","label":"Measured grayscale ΔE (avg)","value":1.74,"unit":"ΔE","standard":"CIEDE2000 · ITU-R BT.2124 (ΔE ITP)","basis":"measured","mode":"Reference, after calibration","conditions":"White screen","sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"average dE of 1.74"}]},{"key":"observed.gamma_avg","label":"Measured gamma (avg)","value":2.25,"unit":"γ","standard":"Reviewer","basis":"measured","mode":"Reference, after calibration","conditions":"White screen","sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"gamma of 2.25"}]},{"key":"observed.max_lumens","label":"Measured max lumens","value":3792,"unit":"lm","standard":"9-point (IEC 61947-1-style) by reviewer","basis":"measured","mode":"Bright","conditions":null,"sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"Bright mode: 3792 lumens"}]},{"key":"observed.noise_db","label":"Measured noise","value":45,"unit":"dB(A)","standard":"Reviewer SPL meter (distance, weighting recorded)","basis":"measured","mode":"Eco","conditions":null,"sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"I measured 45 dB on the projector"}]},{"key":"observed.on_off_contrast","label":"Measured on/off contrast","value":1400,"unit":":1","standard":"Reviewer (on/off; 4×4 checkerboard)","basis":"measured","mode":"Cinema, Dynamic brightness mode","conditions":null,"sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"I obtained an on/off contrast of around 1400:1 in cinema mode"}]},{"key":"observed.uniformity_pct","label":"Measured uniformity","value":80,"unit":"%","standard":"Reviewer","basis":"measured","mode":null,"conditions":null,"sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"I measured a loss of less than 20% between the center and periphery of the image"}]},{"key":"observed.white_point_cct","label":"Measured white point","value":6603,"unit":"K","standard":"Reviewer","basis":"measured","mode":"Reference, after calibration","conditions":"White screen","sources":[{"url":"https://www.laurentwillen.com/en/test-reviews/projectors-tests-reviews/optoma-uhd38x-4k-projector-test-review/","title":"Optoma UHD38x 4K projector test and review","kind":"review","quote":"white temperature of 6603k"}]},{"key":"optics.corner_correction","label":"Corner / warp correction","value":"warp","unit":null,"standard":"Vendor","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"3x3 Warp: Adjust the image distortion by 9 points correction."}]},{"key":"optics.f_number","label":"F-number","value":[1.98,2.02],"unit":null,"standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"F-stop: 1.98~2.02"}]},{"key":"optics.fixed_offset_pct","label":"Fixed offset","value":105,"unit":"%","standard":"Vendor (no common convention)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Native offset 105%"}]},{"key":"optics.focal_length_mm","label":"Focal length","value":[15.84,17.42],"unit":"mm","standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Focal length (mm) 15.84 mm~17.42mm"}]},{"key":"optics.focus","label":"Focus","value":"manual","unit":null,"standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"2. Focus Ring"}]},{"key":"optics.image_size_in","label":"Image size range","value":[33,300],"unit":"in","standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Screen size 33\" ~ 300\" diagonal"}]},{"key":"optics.keystone_h_deg","label":"Horizontal keystone","value":[-40,40],"unit":"°","standard":"Vendor","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Keystone correction - horizontal +/-40°"}]},{"key":"optics.keystone_v_deg","label":"Vertical keystone","value":[-40,40],"unit":"°","standard":"Vendor","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Keystone correction - vertical +/-40°"}]},{"key":"optics.lens_shift_v_pct","label":"Vertical lens shift","value":[0,0],"unit":"%","standard":"ISO/IEC 21118 §3.4 (definition), §3.5 (image position)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Lens shift Vertical +0%"}]},{"key":"optics.projection_distance_m","label":"Projection distance table","value":{"100":[3.32,3.65],"120":[3.98,4.38]},"unit":"m","standard":"ISO/IEC 21118 item 9","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf","title":"Optoma DLP Projector user manual (English), linked from the 4K400x product page","kind":"manual","quote":"100 2.21 1.25 87.16 49.03 3.32 3.65 ... 120 2.66 1.49 104.59 58.83 3.98 4.38"}]},{"key":"optics.throw_ratio","label":"Throw ratio","value":[1.5,1.66],"unit":":1","standard":"ISO/IEC 21118 item 9, §3.6","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Throw ratio 1.5:1 ~ 1.66:1"}]},{"key":"optics.zoom_ratio","label":"Zoom ratio","value":1.1,"unit":"×","standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Zoom 1.1"}]},{"key":"optics.zoom_type","label":"Zoom type","value":"optical","unit":null,"standard":"ISO/IEC 21118 Table 1","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://www.optomausa.com/product/uhd38x","title":"Optoma UHD38x product page and specifications (US)","kind":"manufacturer_spec_page","quote":"Zoom type Manual"}]},{"key":"physical.colors","label":"Colours / finishes","value":["white"],"unit":null,"standard":"Vendor","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/770d996d-c131-4407-be36-62ac98b8a94d.pdf","title":"Optoma UHD38x datasheet (English EU)","kind":"spec_sheet_pdf","quote":"Colour: White"}]},{"key":"physical.depth_mm","label":"Depth","value":270,"unit":"mm","standard":"ISO 21118 (later items, preview-limited)","basis":"rated","mode":null,"conditions":null,"sources":[{"url":"https://region-resource.optoma.com/products/import/Documents/fce45d8c-a07f-46ce-a06b-edecf1f01d0d.pdf","title":"Optoma UHD38x datasheet (English US, preliminary)","kind":"spec_sheet_pdf","quote":"Dimensions (W x D x H) 315 x 270 x 118 mm"}]},{"key":"physical.height_mm","label":"Height","value":118,"unit":"mm","standard":"ISO 21118 (later items, 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