ATEN VE1821 4K HDMI Cat 6 Extender
PRODUCT DESCRIPTION
ATEN VE1821 4K HDMI Cat 6 Extender - 2 Years Local Warranty
4K HDMI up to 40 m on One Cable
The VE1821 transmitter and receiver kit carries 4K HDMI video and audio over a single Cat 6 cable up to 40 m (30 m over Cat 5e), with zero latency, for displays and projectors far from the source.
Only One Power Adapter
Power over Cable (PoC) sends power from the transmitter to the receiver over the same cable, so no power outlet is needed at the display end.
Control the Source from the Screen
IR signals are passed from the receiver back to the transmitter, so the source can be operated with its own remote control from the display side. IR emitter and receiver cables are included.
Palm-Sized, With Local Output
Ultra-light, palm-sized metal units fit behind displays and in tight spaces. The transmitter has a local HDMI output for monitoring, and a built-in EDID switch selects which display's EDID the source uses.
Installing displays in several rooms or a retail site? Email sales@sourceit.com.sg for volume pricing and lead time.
ATEN VE1821 Datasheet — Technical Specifications
General
| Product Name | ATEN 4K HDMI Cat 6 Extender |
| Model | VE1821 (VE1821T transmitter + VE1821R receiver) |
| Order Code | VE1821-AT-G |
| Local Warranty (Singapore) | 2 years carry-in warranty |
Connectors
| Transmitter (VE1821T) | 1 x HDMI Type A Female in; 1 x HDMI Type A Female local out; 1 x IR mini stereo jack; 1 x RJ-45 Female; 1 x DC jack (locking) |
| Receiver (VE1821R) | 1 x HDMI Type A Female out; 1 x IR mini stereo jack; 1 x RJ-45 Female (powered over cable from VE1821T) |
Video
| Maximum Resolution | 4096 x 2160 / 3840 x 2160 @ 30 Hz (4:4:4) |
| Max Data Rate | 10.2 Gbps |
| Max Pixel Clock | 340 MHz |
| Compliance | HDMI (3D, Deep Color, 4K); HDCP 1.4 |
Distance
| Cat 6 | 4K up to 40 m |
| Cat 5e | 4K up to 30 m |
Audio
| Formats | LPCM 7.1CH, Dolby TrueHD, Dolby Digital Plus, DTS-HD Master Audio |
Control
| IR | Single way, receiver to transmitter |
| EDID | Built-in EDID switch; EDID copying mode |
Power
| Transmitter | DC 12 V, 1.86 W (power adapter included) |
| Receiver | Power over Cable from transmitter, 0.87 W |
Environmental
| Operating Temperature | 0–40 °C |
| Storage Temperature | -20–60 °C |
| Humidity | 20–90% RH, non-condensing |
Physical
| Housing | Metal |
| Weight | 0.12 kg per unit |
| Dimensions (L x W x H) | 7.95 x 6.80 x 1.65 cm with bracket; 5.75 x 6.80 x 1.65 cm without bracket (each unit) |
Compatibility & Applications
Typical Sources
PCs, media players, set-top boxes and digital signage players with HDMI output.
Typical Use
Ceiling projectors and wall displays in meeting rooms and classrooms, retail and restaurant signage, and home AV where the source is in a cabinet.
Selection Tip
The VE1821 handles 4K at 30 Hz. For longer runs to 100 m or 4K60 with RS-232 control, look at an HDBaseT Class A set such as the VE2812AT with VE2812PR.
Package Contents & ATEN HDMI Extender Ordering Information
In the Box
1 x VE1821T transmitter, 1 x VE1821R receiver, IR emitter and receiver cables, power adapter and cord with regional plugs, user instructions.
ATEN AV Extender Models
| Model | Key feature |
| VE150A | VGA Cat 5 extender, 1280 x 1024 @ 150 m |
| VE1821 (this listing) | 4K HDMI Cat 6 extender, 40 m |
| VE811 | HDMI HDBaseT extender |
| VE802R | HDMI HDBaseT-Lite receiver with PoH, 4K @ 40 m |
| VE1801AEUT | HDMI HDBaseT-Lite transmitter, EU wall plate |
| VE2812AT | HDMI and VGA HDBaseT transmitter with PoH, 4K @ 100 m |
| VE2812PR | HDMI HDBaseT receiver with audio de-embedding, 4K @ 100 m |
Datasheet & Downloads
| Datasheet | VE1821 Datasheet (PDF) |
| Quick start guide | VE1821 Quick Start Guide (PDF) |
| ATEN product page | VE1821 on aten.com |
Need a PDF sent directly? Email sales@sourceit.com.sg quoting VE1821-AT-G.
Frequently Asked Questions — ATEN VE1821
How far can it extend 4K?
Up to 40 m over Cat 6 or 30 m over Cat 5e, at up to 4096 x 2160 / 3840 x 2160 @ 30 Hz.
Do I need power at the display end?
No. The receiver is powered over the Cat cable from the transmitter (Power over Cable).
Is this a complete kit?
Yes. It includes both the transmitter and the receiver plus the power adapter and IR cables.
Can I control my source from the display side?
Yes. IR is passed from the receiver to the transmitter, so you can use the source's remote at the display.
Does it support 4K at 60 Hz?
No. Maximum is 4K @ 30 Hz (4:4:4).
What warranty do I get?
2 years local carry-in warranty. Supplied by SourceIT with a GST invoice.






