Three-Input HD Video Scaler for HDMI and VGA Signals

Model Number: AT-HD-SC-500

  •  3×1 HDMI® and VGA video scaler
  • HD video scaler with HDMI output and input resolution control
  • Automatic display control using Consumer Electronics Control (CEC)*, IP, and RS-232
  • Automatic input selection using video detection technology
  • TCP/IP and RS-232 control of scaler
  • Front panel input selection
  • Front panel display on/off
  • Front panel volume control
work_with_ams featured_solution2

Three-Input HD Video Scaler for HDMI and VGA Signals

The Atlona AT-HD-SC-500 is a video scaler with built-in 3×1 switcher for HDMI and VGA signals. It features two HDMI inputs and a VGA input with a 3.5mm audio connector. It features automatic display control using CEC, IP, and RS-232 plus auto input selection.

The scaler is designed to take video signals from switchers, PCs or laptops and scale them to an HDMI output at a wide-range of HDTV and PC resolutions, up to 1080p/60Hz and WUXGA (1920×1200).

The AT-HD-SC-500 can be the central component of a small, automated AV system. Automatic display control turns on the display automatically whenever a source is connected. When the source is removed, the display is turned off. Volume is controlled by using the front panel buttons. Automatic input selection on the AT-HD-SC-500 works by sensing the presence of any video signal. With automatic input selection, manual control systems can be eliminated. Input selection can also be controlled from the front panel, RS-232, or TCP/IP commands.

Automatic Display Control

Offering first-of-its-kind display capabilities, the AT-HD-SC-500 allows display control using CEC, TCP/IP or RS-232 signals. This means that many more types of displays can be controlled, costs are reduced, and that wiring is simplified. In a commercial setting, when a switcher is integrated with a display, the AT-HD-SC-500 forces the display to power on automatically when a laptop is connected. At the end of the presentation, when the presenter disconnects the laptop, the AT-HD-SC-500 forces the display to power off. Ease of presenter interaction with the system and the savings incurred by auto-display shutdown provide a significant return on investment.

  • CEC – The AT-HD-SC-500 features Consumer Electronics Control (CEC) providing simplified display control for a significant reduction in the cost of the display (compared to an RS-232 controlled display). CEC is a communication channel incorporated in the HDMI specification allowing connected devices to control each other.
  • TCP/IP  – The LAN port on the AT-HD-SC-500 not only allows it to be managed but also allows the scaler to control a display that is connected to the same network. The scaler is able to route commands over IP for automatic display control to compatible displays. Devices must be connected to a router to manage IP addresses.
  • RS-232  – Many displays including projectors, commercial flat panel displays, and some consumer displays can be controlled using the RS-232 signal directly from the switcher. The scaler is able to send commands using RS-232 for automatic display control to compatible displays.  
  • FLEXIBLE, POWER BUTTON – The power button on the front panel can be set to either turn the AT-HD-SC-500 on/off or it can be set to control the attached display. In addition to using the front panel power button, display on/off commands can be triggered automatically based on presence of video signals, or by a third-party control system using either TCP/IP, RS-232, or IR signals.
  • SCALER OR DISPLAY VOLUME CONTROL – Volume control buttons on the front panel can control either the analog audio output of the AT-HD-SC-500 or they can be set to control the volume of any device that allows volume control using TCP/IP or RS-232, such as a flat panel display, DSP, or another switcher. This gives great flexibility to the system design.
  • MULTIPLE POINTS OF CONTROL – Since all these commands can be sent using TCP/IP, it becomes simple to have multiple control points in a larger system. The AT-HD-SC-500 could be used as an input device for an AT-UHD-CLSO-824 and the buttons would then be able to manage a variety of functions such as “Show me” and volume.

Reliable Auto-Switching

Automatic input selection on the AT-HD-SC-500 detects an active video signal, rather than looking for the 5-volt, hot plug signal. This means that devices such as DVRs, DisplayPort adaptors and other devices that keep the 5-volt hot, no longer trigger the automatic input selection. This gives far more reliable performance with these products.

Configuration, maintenance and updates are performed using Atlona’s WebGUI, AMS IP management system, or OSD. Set-up options include HDCP status, variable preferred input resolutions, output resolution, plus control of brightness, contrast, saturation, hue and sharpness. The AT-HD-SC-500 is ideal for applications where multiple signals with different resolutions must be optimized for a display.

Compact scaling switcher

The AT-HD-SC-500 combines a scaler with multiple inputs and automatic input selection capabilities for use in a small system with HDMI and VGA sources along with audio features that include analog de-embedding, volume control, and equalization.

The AT-HD-SC-500 also supports the Atlona Management System (AMS), a powerful network software platform that integrates product configuration, management and updating. Specially designed for IP-controllable Atlona Products, the Atlona Management System reduces installation time and enables remote monitoring and support.  To learn more please visit AT-SW-AMS.

The AT-HD-SC-500 is ideal for:

Complete System Applications

The three-input scaler accommodates one or two HDMI sources plus a VGA source for classrooms, huddle rooms, and small conference rooms. The front panel control buttons can be used for control of inputs or show me functions. The compact form factor enables under-surface mounting at a desk, table, or lectern. Audio de-embedding on the scaler provides professional, balanced connections to a small amplifier and speakers for better audio.

Expanding System Capabilities

The scaler can also be used as an input device on a switcher that doesn’t have a VGA input such as the AT-UHD-SW-52ED. The device also works well as an output scaler for the AT-UHD-CLSO-824 matrix switcher.

*Consumer Electronics Control (CEC): Atlona does not guarantee the function of CEC with all televisions.  We can confirm proper operation with many current Samsung, Panasonic, and Sony TVs. Many manufacturers do not support the CEC “off” command when sent from a source and older TVs use proprietary commands. Atlona only supports those TVs that follow CEC command structure from HDMI 1.2a and support the “off” command when issued by a source. We encourage any dealer to get evaluation product from Atlona prior to designing a system around this control technology or be prepared to use other methods to control their displays if Atlona CEC is not compatible with the installed displays.

Configured and Managed by AMS

The AT-HD-SC-500 also supports the Atlona Management System (AMS), a powerful network software platform that integrates product configuration, management and updating. Specially designed for IP-controllable Atlona Products, the Atlona Management System reduces installation time and enables remote monitoring and support. To learn more please visit AT-SW-AMS.


3×1 HDMI and VGA video scaler

  • Features two HDMI inputs plus a VGA input with 3.5mm audio connector
  • Allows advanced HDMI display devices to be used with legacy VGA sources

HD video scaler with HDMI output and input resolution control

  • Scales output video signals up to 1080p/60Hz and1920×1200; Choose preferred scaler input resolution from 800×600 to 1920×1200
  • Assures compatibility of VGA and HDMI sources with the display

Automatic display control using CEC, TCP/IP, or RS-232 commands

  • Automatically changes projector power state based on active or standby mode of scaler. Control signals transmitted via CEC, IP or RS-232.
  • Eliminates need for complex control system in AV systems. Enables display and volume control. CEC enables control of low-cost consumer displays.

Automatic input selection using video detection technology

  • Selects active input when sources are connected or if there is a change in source power status
  • Eliminates need for complex control system in AV systems

Two HDMI inputs

  • Digital inputs to support up to two HDMI sources or DisplayPort and DVI sources with appropriate adapters
  • Ideal for a variety of digital sources including laptops, PCs, and cameras

One analog input on 15-pin HD connector

  • Accepts RGBHV signals using common adaptors and break out cables
  • Provides input options for legacy analog sources

TCP/IP and RS-232 control

  • Flexible control options for compatibility with third-party control systems. RS-232 controlled from HDBaseT™ connection
  • Reduces integration time and costs

EDID management

  • Manages EDID communications between source and switcher; allows integrators to force a source to a preferred resolution
  • Ensures desired audio formats and video resolutions are provided to the AV system

HDCP management

  • HDCP compliance can be disengaged through AMS, the web GUI, or a control system
  • Allows non-protected material from PCs to pass to non-compliant displays, streaming devices, and teleconference systems; protected content is not transmitted

Front panel input select button

  • Overrides automatic input selection when two active sources are present
  • Simple manual control allows presenter to maintain control of the image on screen

Front panel display on/off control

  • Remotely controls display power state; provides alternate ‘Display Mute’ mode
  • Eliminates need for manual operation of display or use of IR remote control

Front panel volume control

  • Adjusts level of both embedded and de-embedded audio; provides ‘Mute’ mode
  • Simplifies audio level settings for best sound 

Audio de-embedding

  • De-embeds PCM audio from HDMI inputs to audio output
  • Provides audio signal routing to sound system

Balanced audio output

  • Professional, +4dBu audio is provided on a 5-pin captive screw connector
  • Allows for fast integration with professional sound systems

Works with AMS

  • This IP-controllable product can be remotely managed by the Atlona Management System software
  • Integrates product configuration, management, and updates to reduce installation time and enable remote support

Included accessories

  • User guide, power supply, detachable power cable, captive screw connectors, and mounting brackets

Award-winning 10 year limited product warranty

  • Ensures long-term product reliability and performance in residential and commercial systems
  • Specify, purchase, and install with confidence



Introducing the HD-SC-500
Three-Input Scaler for HDMI and VGA Signals

IN 1080p@23.98/24/25/29.97/30/50/59.94/60Hz, 1080i@50/59.94/60Hz, 720p@50/59.94/60Hz, 576p, 576i, 480p, 480i
1920×1200, 1680×1050, 1600×1200, 1600×900, 1440×900, 1400×1050, 1366×768, 1360×768, 1280×1024, 1280×800, 1280×768, 1152×864, 1024×768, 800×600, 640×480
Preferred IN resolution 1920×1200, 1920×1080, 1366×768, 1280×800, 1280×720, 1024×768, 800×600
OUT 1080p@23.98/24/25/29.97/30/50/59.94/60Hz, 1080i@50/59.94/60, 720p@25/29.97/30/50/59.94/60
1920×1200, 1680×1050, 1600×1200, 1600×900, 1400×1050, 1366×768, 1280×1024, 1280×800, 1024×768, 800×600
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2
Color Depth 8-bit, 10-bit, 12-bit
Analog IN 3.5mm stereo jack, -10 dBu nominal input
Analog OUT Balanced, +4 dBu nominal analog output. Max output +18 dBu (only from 2Ch PCM sources)
HDMI IN/OUT PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby Digital, DTS 5.1, DTS:X, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos
Sample Rate 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bit Rate up to 24-bit
HDMI IN/OUT @ 1080p up to 10 meters up to 30 feet
Bandwidth 6.75 Gbps
HDCP Switchable – Compliant/Non-compliant
Operating 0°C to 50°C 32°F to 122°F
Storage -20°C to 60°C -4°F to 140°F
Humidity 20 to 90% non-condensing
Consumption 10.4W
Supply Input: AC100~240 ~ 50/60Hz 0.5A
Output: DC 5V/3.6A
H x W x D 38 x 127 x 102 (mm) 1.5 x 5 x 4.02 (inch)
Unit 0.27kg 0.60lbs
Power Supply CE, TUV, RCM, RoHS, FCC
Unit CE, FCC
AT-HD-SC-500 Application


pdf-icon Installation Guide
pdf-icon Datasheet
pdf-icon Manual V.5 (9/8/16)
pdf-icon Product Engineering Document

Diagrams, Drawings & CAD Files

cad-icon-(1) CAD Files

Declarations Of Conformity

pdf-icon Declarations Of Conformity

AT-HD-SC-500 Firmware

Download Firmware version 1.3.10
Revision E
File Size 632 KB
Date 07.7.16

Update includes:

  • Added the ability to switch between static and DHCP IP addresses
  • Added analog audio input gain control
  • Auto power on is now correctly triggered by the VGA input
  • View release notes for more…

Related Products

AT-UHD-CLSO-824 4K/UHD, 8×2 Multi-Format Matrix Switcher with Dual, HDBaseT and Mirrored HDMI Outputs
AT-UHD-EX-100CE-RX HDBaseT receiver with Ethernet, RS-232 and IR
AT-UHD-SW-52ED 4K/UHD, 5-Input HDMI Switcher with Mirrored HDMI and HDBaseT Outputs and PoE

Similar Products

AT-HDVS-150-TX Three-Input, HDBaseT Switcher/Transmitter with HDMI and VGA Inputs
AT-HDVS-150-TX-WP Two-Input, HDBaseT Wall Plate Switcher/ Transmitter with HDMI and VGA Inputs
AT-HDVS-200-TX Three-Input Switcher for HDMI and VGA Sources with Ethernet-Enabled HDBaseT Output
AT-HDVS-200-RX Ethernet-enabled HDBaseT Scaler with HDMI and Analog Audio Outputs

Crestron RS-232 and TCP/IP Control
File Size 604 KB
Date 09.16.16

Neets RS-232 and IP
File Size 5 KB
Date 02.27.17

Click below for Support details

Three-Input HD Video Scaler for HDMI and VGA Signals