The Chroma A270162 Multiple Signal Module supports eDP, MIPI, and LVDS signal testing. Each signal type provides two output ports, allowing users to switch output interfaces without reconnecting physical cables. When paired with the Chroma 27015 Flat Panel Display Tester, it provides standard eDP, MIPI, and LVDS signals and related controls.
eDP, short for Embedded DisplayPort, is a display interface standard defined by VESA. The A270162 complies with the eDP 1.4b specification and supports up to two output ports (4+4 lanes) operating simultaneously. When used with the Chroma 27015 mainframe, it supports test resolutions up to 8K (8000 x 3000) @60Hz, meeting high-end 8K image testing requirements.
*VESA stands for Video Electronics Standards Association.Compliant with the eDP 1.4b specification for supported transmission rates, the A270162 supports up to 4+4 lane output and provides seven configurable lane rates (1.62 / 2.16 / 2.43 / 2.7 / 3.24 / 4.32 / 5.4 Gbps) and 8.1 Gbps (optional). Users can configure different resolutions to support flexible testing applications according to DUT requirements.
Color depth options of 6 / 8 / 10 bits are available for testing. For example, 10-bit color depth divides each primary color into 1024 levels (210), enabling up to approximately 1.07 billion colors (210 R* 210 G* 210 B) and allowing users to customize test applications.
For signal transmission margin testing, the A270162 provides a Manual mode in addition to Auto link training mode, supporting configuration of lane count, swing level, and pre-emphasis settings.
• Lane Count: 1 / 2 / 4 / 8 (4+4) lanes
• Swing Level: 200 / 250 / 300 / 350 / 400 / 450 / 600 / 800 / 1000 mV
• Pre-Emphasis: 0 / 3.5 / 6 / 9.5 dB
An integrated high-speed graphics core significantly improves graphics processing and data transfer speeds. For ultra-high-resolution images, switching time can be as short as 0.1 seconds (based on an 8K bitmap), improving testing efficiency.
SSC (Spread Spectrum Clocking) is a technique used to reduce electromagnetic interference (EMI) generated by electronic equipment. By varying or spreading the signal energy that would otherwise be concentrated at a single frequency, or by mitigating clock edge effects, SSC reduces peak radiated power and thereby minimizes interference between devices. The A270162 features a down-spread SSC configuration mode, providing an enable/disable option with a 0.5% down-spread range at a modulation frequency of 30,000 Hz.
DSC (Display Stream Compression) is an image stream compression technology in which the transmitter encodes and compresses the image data prior to transmission, enabling high resolution content to be delivered over limited bandwidth. The receiver then decodes and decompresses the received data, allowing the reconstructed image to be displayed with near visually lossless quality. (Optional)
SPI (Serial Peripheral Interface) is a high‑speed serial communication interface featuring synchronous operation, full‑duplex data transfer, and a master‑slave architecture. Using four signal lines (
EDID (Extended Display Identification Data) is a display identification data standard defined by VESA as part of the DDC (Display Data Channel) specification. The A270162 can directly read, compare, and write the display’s internal EDID registers via I2C or AUX. This data contains information such as manufacturer details, product serial number, production date, supported resolutions, color settings, and frequency range limitations. Both eDP ports can be independently connected to an external PC, allowing users to edit and control EDID functions through the software interface and view complete analysis results.
PSR (Panel Self‑Refresh) is an automatic panel refresh technology that allows the system to halt display data transmission and refresh operations when operating in a static state, thereby reducing overall system power consumption and effectively extending the battery life of mobile devices. For example, when a smartphone displays a static home screen, the transmission of image data is stopped, and the panel module refreshes the image using its internal memory. To enable this function, both the source (transmitter) and sink (receiver) must support PSR. When the source outputs a fixed static image, it uses the Main Link (which controls video data) to notify the receiver. The receiver then stores the image in its internal memory and continues displaying it via the RFB Controller. At this point, the transmitter can stop sending image data, reducing device power consumption and saving energy.
PSR2 (Panel Self‑Refresh 2) further enables ‘selective update’, allowing only specific regions of the display to be refreshed. The source device transmits update region information to the sink, which then refreshes the corresponding areas. This approach allows the graphics processor to transmit only the portions of data that require updating, significantly reducing data transmission bandwidth. In addition, PSR2 supports Advanced Link Power Management (ALPM), which allows the receiver to rapidly exit standby or sleep states when required. The A270162 supports precise positioning and selection of specific screen regions for update verification and testing. (Optional)
MIPI (Mobile Industry Processor Interface) is a specification defined by the MIPI Alliance for processors used in mobile devices such as smartphones, tablets, and notebook computers. It is designed to reduce issues including image noise, blur, distortion, and display latency during image capture and transmission. The A270162 supports MIPI output configurations of 1 / 2 / 3 / 4 / 8 lanes, with data rates of up to 1.5 Gbps per lane. When paired with the Chroma 27015, it supports test pattern resolutions of up to 4K@60Hz (with DSC mode), providing users with flexible testing applications across multiple resolutions.
*MIPI is the Mobile Industry Processor Interface.Color is represented as a triplet of red, green, and blue components, commonly referred to as RGB color. Each color component ranges from 0 to 255. In RGB 888, each component uses 8 bits, resulting in a color depth of 24 bpp (224) and the ability to display up to approximately 16.77 million colors. The A270162 allows users to freely configure RGB 565 / 666 / 888 formats to support a wide range of color‑format testing applications.
*The curves and color areas are not representative of the actual proportional scale.
To support various display data compositions (data mapping), the A270162 supports multiple MIPI signal modes, offering flexible options for data splitting, arrangement, and combination. It provides users with 1 / 2 / 3 / 4 / 8 (4+4) lane mapping configurations, enabling multiple pixel mapping modes, such as left‑right mapping and dot-based arrangements, to accommodate different display requirements.
An integrated high-speed graphics core significantly improves graphics processing and data transfer speeds. For ultra-high-resolution images, switching time can be as short as 0.1 seconds (based on an 4K bitmap), improving testing efficiency.
SPI (Serial Peripheral Interface) is a high‑speed serial communication interface featuring synchronous operation, full‑duplex data transfer, and a master‑slave architecture. Using four signal lines (
DSC (Display Stream Compression) is an image stream compression technology in which the transmitter encodes and compresses the image data prior to transmission, enabling high‑resolution content to be delivered over limited bandwidth. The receiver then decodes and decompresses the received data, allowing the reconstructed image to be displayed with near visually lossless quality. (Optional)
LVDS (Low‑Voltage Differential Signaling) is widely used in LCD panels. The A270162 supports multiple LVDS signal modules with 1 / 2 / 4 link configurations, allowing flexible and interchangeable output selection, with a maximum data rate of 150 MHz per link. When combined with the Chroma 27015 mainframe, it supports test pattern resolutions of up to 4K@60Hz, providing users with a wide range of resolution‑based testing applications.
To address the encoding definition between LVDS physical cabling and logical signal output, the A270162, when used with the Chroma 27015, allows users to select JEIDA (Japan Electronic Industry Development Association) or VESA (Video Electronics Standards Association) standard modes via the FPD Master software. The system also supports vertical and synchronization signal polarity testing, as well as left‑right image shifting functions. These features enable encoding definition adjustments without any modification to the physical cable, allowing flexible and rapid adaptation to custom application designs.
*REF：Japan Electronic Industry Development Association & Video Electronics Standards Association
*以10 bits為例
The A270162 supports color depths of 6 / 8 / 10 bits for testing selection. For example, a 10‑bit color depth means that each primary color channel (R, G, B) is divided into 1,024 levels (210), enabling the display of up to approximately 1.07 billion colors (210 R × 210 G × 210 B). This allows users to freely configure and customize color‑depth‑based testing applications.
An integrated high-speed graphics core significantly improves graphics processing and data transfer speeds. For ultra-high-resolution images, switching time can be as short as 0.1 seconds (based on an 4K bitmap), improving testing efficiency.
The Link Swap function of the FPD Master software provides users with a more convenient way to switch between physical cable connections and logical content mapping. Through software configuration, the content assigned to Link 1–4 can be reassigned to different hardware output links, enabling real‑time verification and debugging while significantly reducing the time required for cable reconnection and re‑routing.
To support various display data compositions (data mapping), the A270162 supports multiple LVDS signal modes, offering flexible options for data splitting, arrangement, and combination. It provides 1 / 2 / 4 link mapping configurations, enabling a variety of pixel mapping modes, such as left‑right mapping and odd/even pixel mapping, to meet different display application requirements.
