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Communication Protocol Guide v1.4.0 - 5/11/06

Phone (518) 899-1254 • Fax (518) 899-1251 • www.request.com

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Introduction

This document describes how to communicate with the VideoReQuest via IR, Serial, or Ethernet. For

Serial and Ethernet, we will also explain how data feedback is formatted. Serial and Ethernet protocol is

identical in terms of commands sent to the VideoReQuest and feedback received from the VideoReQuest.

For the purpose of simplicity, Serial and Ethernet communication will be referred to as Serial in this

document.

Conventions Used

1) Throughout this document, we will use the lowercase ‘H’ (

) notation when we wish to denote a

Hexadecimal number. Multi-Byte strings will be written as “XX

, YY

, …”.

Examples:

• The Hex number 39 will be written as 39

, which is 57 in ASCII, or the number 9

• The Hex string 4AC5 will be written as 4A

, C5

2) VRQ and VideoReQuest will be used synonymously to describe the VideoReQuest line of products.

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Zektor HDS4.1 Manuale Utente Pagina 4