Postium Korea OBM-U428K Overview
Monitor your 4K or 8K studio or field production with the OBM-U428K 42" HDR 8K LCD Monitor from Postium Korea. With full input support for signals up to 8K60, the OBM-U428K offers 3840 x 2160 display resolution and a 178° viewing angle, with a brightness of 700 cd/m² and a 1000:1 contrast ratio. It features four 12G-SDI inputs, which can be used as single-link inputs for resolutions up to DCI 4K, and quad-link inputs for bringing in 8K. Four 12G-SDI loop outputs allow you to send up to four separate signals to other destinations. An HDMI 2.0 input and two SFP optical inputs provide additional options for bringing in video with embedded audio, and a 3.5mm line input offers analog stereo connectivity. A 3.5mm analog stereo output allows you to monitor sound via optional headphones. The monitor comes with its own power cord.
Features at a Glance
- 12G-SDI quad-link 8K / 12G-SDI single-link 4K
- 6G-SDI dual-link 2-S.I. 4K
- 3G-SDI quad-link square division 4K / 3G-SDI quad-link 2-Sample Interleave 4K
- Dual SFP module Inputs (ST 2022-6 Support)
- HDMI 2.0 input
- HDR (high dynamic range) display supporting PQ (ST 2084), Hybrid Log Gamma, S-Log3
- Wide color gamut ITU-R BT.709, SMPTE-C, EBU, Native, DCI-P3, ITU-R BT.2020
- Internal color processing 72-bit (24-bit x 3) + Native 33x33x33 30-bit 3D-LUT
- 1,073 billion colors
- Gamut error
- Black stretch
- Camera Log conversion
- Custom 3D LUT file import through USB
- Gamma Selection (1.0 to 3.0)
- SDR EOTF - BT.1886 (Gamma 2.4)
- Color temperature (3200K, 5500K, 6500K, 9300K, USER 1/2/3, D-CINEMA)
- Monitor control via Ethernet, RS-422
- Image division and link order autodetection
- Waveform, vectorscope
- HDR waveform
- Various markers (EBU, 4:3, 16:9, 1.85:1, 2.35:1, variable custom)
- Zero scan
- Timecode display
- De-embedded 8-16 channel audio level meter
- Internal pattern display for color test (black, 100% white, color bar)
- Remote control via GPI (RJ-45) port
- False color: Zebra, color pattern, ARRI
- Easy firmware update by USB
- System data copy
- H/V delay
- Blue/mono only
- Focus assist
- 3-color tally lamp
- HDR auto setting
- Aspect
- Freeze
Postium Korea OBM-U428K Specs
Key Specs
| Display Size | 42.5" / 108.0 cm |
| Native Resolution | 3840 x 2160 |
| Touchscreen | No |
| HDR Support | Yes, Hybrid Log Gamma |
| Video I/O | 4x BNC (12G-SDI) Input 1x HDMI 2.0 Input 4x BNC (12G-SDI) Loop Output |
| Media/Memory Card Slot | No |
| Video Format | SDI 8K: 60/59.94/50 UHD 4K: 60/59.94/50/30/29.97/25/24/23.98 DCI 2K: 24/23.98 DCI 2K PsF: 24/23.98 1080p: 60/59.94/50/30/29.97/25/24/23.98 1080PsF: 30/29.97/25/24/23.98 1080i: 60/59.94/50 1035i: 60/59.94 720p: 60/59.94/50 HDMI UHD 4K: 60 |
Display
| Panel Type | IPS-Type LCD |
| Display Size | 42.5" / 108.0 cm |
| Screen Area | 37.055 x 20.843" / 941.184 x 529.416 mm |
| Native Resolution | 3840 x 2160 |
| Aspect Ratio | 16:9 |
| Viewing Angle | Horizontal: 178° Vertical: 178° |
| Touchscreen | No |
| Maximum Brightness | 700 nits / cd/m2 |
| Contrast Ratio | 1000:1 |
| Dot Pitch | 0.2451 x 0.2451 mm |
| Bit Depth / Color Support | 10-Bit (1.07 Billion Colors) |
| HDR Support | Yes, Hybrid Log Gamma |
| Pixels Per Inch (ppi) | 104 ppi |
| Image Controls | Blue Only, Color Temperature Selection, False Color, Focus Assist, H/V Delay, Vectorscope, Waveform, Zebra |
Inputs / Outputs
| Video I/O | 4x BNC (12G-SDI) Input 1x HDMI 2.0 Input 4x BNC (12G-SDI) Loop Output |
| Audio I/O | 1x 1/8" / 3.5 mm Line Input 1x 1/8" / 3.5 mm Headphone Output |
| Built-In Speaker | 2 |
| Other I/O | 1x RJ45 (RS-422) Input 1x RJ45 (RS-422) Output 1x RJ45 (LAN) Input 1x RJ45 (GPI) |
| Expansion Slots | 2x SFP Slot |
| Media/Memory Card Slot | No |
| Wi-Fi | No |
| Bluetooth | No |
| Mobile App Compatible | No |
Format Support
| Video Format | SDI 8K: 60/59.94/50 UHD 4K: 60/59.94/50/30/29.97/25/24/23.98 DCI 2K: 24/23.98 DCI 2K PsF: 24/23.98 1080p: 60/59.94/50/30/29.97/25/24/23.98 1080PsF: 30/29.97/25/24/23.98 1080i: 60/59.94/50 1035i: 60/59.94 720p: 60/59.94/50 HDMI UHD 4K: 60 |
| Gamma Curve | DCI-P3, Rec709 |
| Video Standard Compliance | SMPTE 260M/296M/425M-A/425M-B/ST 2082-11/ST 2082-12/ST-274/ST-2048/ST-2081-10/ST-2081-11 ITU -R BT.1886/BT.2020 |
Power
| Input Power | 100 to 230 VAC, 50 / 60 Hz |
Environmental
| Operating Temperature | 32 to 104°F / 0 to 40°C |
| Operating Humidity | 20 to 80% |
General
| Dimensions | 39 x 24 x 3.4" / 990 x 609 x 86.5 mm (Excluding Stand) 39 x 25.2 x 8.3" / 990 x 639.7 x 210 mm (Including Stand) |
| Weight | 70.54 lb / 32.00 kg, Including Stand |
In the Box
- Postium Korea OBM-U428K 42" HDR 8K LCD Monitor
- Power Cord
- 2-Year Manufacturer Warranty (LCD Panel)
- 2-Year Manufacturer Warranty (Main Board)
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