
SMK Quatro Pulse IR Protocol
Achieve RF-like performance with SMK’s Quatro Pulse infra-red (IR) protocol (QPP) without the costs and certifications associated with RF products.
Quatro (four) Pulse accepts up to four accessory units to interface with one receiver or, an imbedded chip for additional cost-savings by eliminating the need for three more receivers or chips.
SMK has designed the perfect solution for wireless applications such as keyboards, mice and multi-user gaming controls with exceptionally high-speed frequency of 455 KHz (conventional frequency is 38 KHz) and a bit rate of 9,600 bps (conventional: 300 to 1,200 bps) with superior angular coverage. A variation with a wide-angle coverage is also available.
A typical system operates with a single transmission modulation. By operating a DVD and a TV simultaneously, the remote control operation will scramble causing receiver signal interpretation problems. Because the QPP has a low compression rate (2-bit) the transmission is compressed over twice the typical 1-bit transmission, there is virtually no interference between all four devices. Therefore, virtually no information will be lost due to signal delay or interference.
The QPP conforms to IEC 764 BAND II standard which targets a 440-480 KHz frequency range.
General Characteristics
- Modulation frequency: 455 KHz
- Transmission speed: 9,600 bps
- Transmission format: 2-bit PPM system (SMK protocol)
- Standard angular range: Horizontal: ±35 degrees, Vertical: ±15 degrees





