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DVDO iScan VP20 Programming Manual

Serial and ir automation specifications and programming guide
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See also: Owner's Manual
Serial and IR Automation Specifications and
Programming Guide
PRO
for iScan VP20, VP30, VP50 and VP50
Revised - December 2007

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Summary of Contents for DVDO iScan VP20

  • Page 1 Serial and IR Automation Specifications and Programming Guide for iScan VP20, VP30, VP50 and VP50 Revised - December 2007...

  • Page 2: Table Of Contents

    Document Contents Preface... 3 Information Warranty Statement ... 3 Document Scope and Limitations... 4 Document Conventions... 4 0.3.1 Model Compatibility... 4 0.3.2 Product Introduction ... 5 0.3.3 VP20 (MM604)... 5 0.3.4 VP30 (MM603)... 6 0.3.5 VP50 (MM605)... 6 0.3.6 VP50 (MM606) ...

  • Page 3: Preface

    If you have just read this and don’t understand what it means – PLEASE contact an authorized DVDO product installer for consultation and installation help. Not getting a picture from the iScan does not necessarily indicate a failure of the iScan device –...

  • Page 4: Document Scope And Limitations

    0.2 Document Scope and Limitations This document will cover the necessary information required to construct and transmit a serial (RS-232) or Infrared (IR) control signal to a DVDO iScan VP video processor. These two basic mediums of control, are intended to convey the intentions of the user or automation system into the processes that operate the iScan.

  • Page 5: Product Introduction

    0.3.2 Product Introduction This section is a brief introduction with pictures of each of the models of the iScan series – it is only intended as a brief “spotters guide” to iScan units. Please refer to your product’s user’s manual or our website for more in-depth product information at www.anchorbaytech.com/products/systems in PDF form at the same website by clicking on the “support”...

  • Page 6: Vp30 (Mm603)

    0.3.4 VP30 (MM603) This model is our high-end entry-level product with the full four HDMI complement, the RGBHV/Component 3 input and Analog video output – with available options like an SD-SDI input and the ABT102 Deinterlacing add-on card for exceptional reproduction of interlaced SD content.

  • Page 7: Vp50 Pro (Mm606)

    0.3.6 VP50 (MM606) iScan VP50 Front iScan VP50 Back The iScan VP50 is the first Video Processor to achieve the THX certification for Video Processors, setting the benchmark for video processing. This device is also the first HDMI 1.3 compatible video processor with the same outstanding Anchor Bay VRS HD and SD content processing algorithms of the preceding models, while adding even further configuration and calibration controls for ISF calibration and the new HD-SDI inputs (2x) and 12-volt triggers (2x) for driving external devices like anamorphic lenses...

  • Page 8: How Does Automation Work

    0.4 How does automation work? The iScan line of DVDO brand video processors are designed to enable control and flexibility over various input and output signal configurations – as well as our proprietary algorithms to improve several aspects of video quality and enable new capabilities that legacy devices by themselves are not able to achieve.

  • Page 9: What Is Binary

    0.4.3 What is Binary? The digital world is all ones and zeros. By placing ones and zeros in a standardized pattern we can encode data that can be exchanged between multiple devices. The lowest level of encoding data is “binary notation”. In this notation, a “bit” represents the “true” or “false”...

  • Page 10: What Is Ascii

    As an example, using “65” again – the HEX equivalent is “41h”. So what’s the “h” at the end? There are two commonly accepted ways to identify HEX notation in a sentence (or “string”). One is with the use of a “0x00” notation, where the two last zeros represent the two HEX characters, or with “00h”...

  • Page 11: A Brief Dialog About Remote Controlling A Vpxx Series Video Processor

    0.5 A brief dialog about remote controlling a VPxx series video processor Please be honest with yourself and ensure that you have understood the previous sections. If you’re not confident about how binary = HEX = decimal and relates to ASCII, then you may want to check out the internet for more information on digital information technology –...

  • Page 12: A Dialog About Input Video Memories

    0.6 A dialog about input video memories Due to the number of inputs and different types of input formats and ever further numerous types of source devices, we at Anchor Bay added input memories, which allow the user/system-integrator to configure very specific “effects” for a specific input format on a specific input connection.
  • Page 13 This page intentionally left blank...

  • Page 14: Rs-232 Control

    1 RS-232 Control 1.1 The RS-232 Physical Connection RS-232 connections come in several styles which are accepted in the consumer electronics industry. The most common is the 9-pin D-Subminiature connector found on the back of most computers, and is the one that we use on the iScan VP The female serial port, found on the back panel of an iScan VP In this interface, there are a few different signals which must be supported.

  • Page 15: The Anchor Bay Rs-232 Protocol

    1.1.1 The Anchor Bay RS-232 Protocol In this portion of the document, we will discus the three types of control communications that occur between the iScan and the controlling device. 1.1.2 A Dialog on Checksums Checksums are a way for a receiving device to double check the communication that occurred between the transmitting device and the receiver.
  • Page 16 Also, each of the above “characters” has a related HEX notation number to go with it: “Attention” = Start Text or STX = 0x >>pause<< = Null or NUL = 0x “I’m Done Talking” = End Text or ETX = 0x It is up to the individual programmer to determine which method is easiest to understand –...
  • Page 17 Before we start listing Command ID bytes, lets look at the “this long” portion of our sentence. For this, count the two command ID bytes (count the bytes, don’t add the values!), add the count of the two NUL bytes (again, don’t add the values), add the count of the value bytes (this really should sink in now - don’t add the values themselves).
  • Page 18 Let’s look at the sentence again, replacing what we know now: “0x02 0x33 0x30 0x30 0x35 0x41 0x31 0x00 0x31 0x00 [checksum – optional] 0x03” If you recall, unless your application calls for it specifically – YOU DO NOT NEED A CHECKSUM!!! If your application doesn’t need it, you are done with the sentence construction (just remove the optional placeholder for the “checksum - optional”): Let’s look at the sentence again, with out the optional checksum placeholder:...
  • Page 19 The checksum. This is the last part other than the Command ID Table and Value Table you might need to create a command string. Again, unless your customer/job requirements demand/specify it – YOU DO NOT NEED A CHECKSUM!! Assuming that you absolutely need to have a checksum due to a customer/job requirement, the checksum is fairly easy - add the value of every byte from the beginning of the string (at STX) to the last “NUL”...

  • Page 20: Example Rs-232 Command Packets

    1.2.1 Example RS-232 Command Packets This section contains the most commonly requested automation command-type strings (no checksums are provided): Power 0x02 0x33 0x30 0x35 0x41 0x31 0x00 0x31 0x00 0x03 0x02 0x33 0x30 0x35 0x41 0x31 0x00 0x30 0x00 0x03 Input Composite 1 0x02 0x33 0x30 0x35 0x41 0x43 0x00 0x31 0x00 0x03...
  • Page 21 Preset 1 0x02 0x33 0x30 0x35 0x43 0x31 0x00 0x35 0x00 0x03 Preset 2 0x02 0x33 0x30 0x35 0x43 0x31 0x00 0x36 0x00 0x03 Preset 3 0x02 0x33 0x30 0x35 0x43 0x31 0x00 0x37 0x00 0x03 Preset 4 0x02 0x33 0x30 0x35 0x43 0x31 0x00 0x38 0x00 0x03 Preset 5 0x02 0x33 0x30 0x35 0x43 0x31 0x00 0x39 0x00 0x03 Preset 6...
  • Page 22 Mosquito Noise Reduction 0x02 0x33 0x30 0x35 0x43 0x41 0x00 0x30 0x00 0x03 Level 1 0x02 0x33 0x30 0x35 0x43 0x41 0x00 0x31 0x00 0x03 Level 2 0x02 0x33 0x30 0x35 0x43 0x41 0x00 0x32 0x00 0x03 Level 3 0x02 0x33 0x30 0x35 0x43 0x41 0x00 0x33 0x00 0x03 Output Display Profile (recall –...

  • Page 23: Query Commands

    1.3 Query Commands Query commands allow an external device to determine the setting of a given control. Building on the information presented in the previous section on constructing Command Packets, we will discuss the method for building a Query Packet. We’ll use the example of querying the “power”...

  • Page 24: Responses

    1.4 Responses Responses (aka “feedback”) is arguably what really make RS-232 a powerful interface. As opposed to infrared control, the RS-232 port allows for bi-directional communication, so that the controlling device can get information from the controlled unit to make decisions based on the actual state of the unit. Response packets are about the same as Command or Query packets –...
  • Page 25 Error “1” – Invalid checksum. This error means either the checksum you sent was wrong or the transmission was bad due to interference (double check your checksum calculation or your serial link). Error “2” – Invalid Incoming Packet ID (i.e. Command = “3”&”0”, Query = “2”&“0”, others are invalid when sent to the iScan) Error “3”...
  • Page 26 The query response is the most involved response packet you will get in reply. This packet can have any data in the “value” bytes (although it will still be ASCII characters in HEX notation). Note that commands like “Model Name” will reply with text, while commands which are controlled by numbers will reply with numbers.

  • Page 27: Ir Control

    2 IR Control We have provided a reprint of Barry Gordon’s paper on IR interfacing in Appendix B at the end of this document. If you feel the information provided in the next few sections is a bit confusing, please take a moment to read that document.

  • Page 28: The Anchor Bay Ir Protocol (Discrete Control)

    2.2 The Anchor Bay IR Protocol (Discrete Control) As stated before, the discrete controls may be longer than the NEC protocol will allow. The NEC protocol only allows for one byte of “control/value” data to be transferred from the remote control to the controlled device.
  • Page 29 If you recall from the RS-232 section, the command ID for the power control is “A” and “1”, but if you look at the Pronto HEX format, the command ID can only be one byte. This is why we made the Command IDs out of “HEX compatible”...
  • Page 30 This writer finds this to be the best step to explain the “bit burst” count in the Pronto HEX format. The bit burst is every “bit” from the after last “0000” in the header to the last “bit” in the command defenition. The bits being referred to are in bold and larger above.

  • Page 31: Discrete Ir Control Examples

    2.2.1 Discrete IR Control Examples Below is a partial list of commonly used discrete commands in Pronto HEX syntax format (Pronto HEX is a common Home-Automation Interchange format): Power 0000 006c 001b 0000 0064 0064 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0041 0044 0044 0016 0001...
  • Page 32 S-Video 2: 0000 006d 0024 0000 0156 00ab 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0015 0016 0015 0015 0015 0016 0015 0016 003f 0016 0040 0015 0015 0016 0040 0015 0040 0016 003f 0016 0040 0015 0040 0016 06c0 0156 0055 0016 00ab Component 1:...
  • Page 33 SDI: 0000 006d 0024 0000 0156 00ab 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0015 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 003f 0016 0040 0015 0040 0016 003f 0016 0015 0016 003f 0016 0040 0015 0040 0016 06c0 0156 0055 0016 00ab Auto:...
  • Page 34 Right: 0000 006d 0024 0000 0156 00ab 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0015 0016 003f 0016 0040 0015 0015 0016 0015 0016 003f 0016 0015 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 003f 0016 0015 0016 003f 0016 0040 0015 0040 0016 06c0 0156 0055 0016 00ab Test Patterns...
  • Page 35 Off: 0000 006c 001b 0000 0064 0064 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0041 0016 0015 0044 0044 016 0001 0000 006c 001b 0000 0064 00640016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015...
  • Page 36 IAR Preset 1: 0000 006c 001b 0000 0064 0064 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015 0016 0015 0044 0044 0016 0001 IAR Preset 2: 0000 006c 001b 0000 0064 0064 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041...
  • Page 37 1.55:1 0000 006c 001b 0000 0064 0064 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0044 0044 0016 0001 1.66:1 0000 006c 001b 0000 0064 0064 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015...
  • Page 38 Audio 4: 0000 006c 001b 0000 0064 0064 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0015 0044 0044 0016 0001 Analog: 0000 006c 001b 0000 0064 0064 0016 0015 0016 0041 0016 0015 0016 0041 0016 0015 0016 0015...
  • Page 39 0000 006c 001b 0000 0064 0064 0016 0041 0016 0041 0016 0041 0016 0015 0016 0015 0016 0041 0016 0041 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 0041 0016 0041 0016 0015 0016 0015 0016 0015 0044 0044 0016 0001 Deinterlacing Modes Auto:...
  • Page 40 Curtain: 0000 006d 0024 0000 0156 00ab 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0015 0016 0015 0015 0015 0016 0015 0016 003f 0016 0015 0016 0015 0015 0015 0016 0015 0016 003f 0016 0040 0015 0040 0016 0015 0015 0040 0016 003f 0016 0040 0015 0040 0016 06c1 0156 0055 0016 00ab 0000 006c 0024 0000 0156 00ac 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015...
  • Page 41 Viewing Modes: 0000 006c 0024 0000 0156 00ac 0016 0015 0016 0015 0015 0040 0016 0015 0015 0015 0016 0015 0016 0015 0015 0041 0016 0015 0015 0015 0016 0015 0016 0015 0015 0015 0016 0041 0015 0015 0016 0015 0016 0040 0016 0015 0016 0015 0015 0015 0016 0040 0015 0015 0016 0041 0015 0015 0016 0015 0016 0040 0016 0041 0015 0041 0016 0015 0015 0040 0016 0015 0015 0041 0016 06cf 0156 0056 0016 00ac Output Setup:...

  • Page 42: Automation Command Ids And Values

    3 Automation Command IDs and Values This section beginning on the next page, contains the entire list of Control/Query commands available with the iScan VP Command ID is in bold-underline (example: A1 for “Power”). The possible values are given for each control in bold (example: 1.000). We have presented the list in the same layout as the OSD starting on the next page, to allow for quick location of the control you are seeking.
  • Page 43 Complete OSD Menu Tree Input Select – Video 1 - Video 2 - S-Video 1 - S-Video 2 - Component 1 - Component 2 - RGBHV/Component - HDMI 1 - HDMI 2 - HDMI 3 - HDMI 4 - SD/HD-SDI 1 - (with HD-SDI module installed) SD/HD-SDI 2 - Auto -...
  • Page 44 Borders (see below) Horizontal – 0-200 Range: Vertical – 0-200 Range: Preset – 4:3 Full Frame - Letterbox - 16:9 Full Frame - 4:3 Stretch - Preset 1 - Preset 2 - Preset 3 - Preset 4 - Preset 5 - Preset 6 - Preset 7 - Preset 8 -...
  • Page 45 Deinterlacing – Auto - Film Bias Mode - Video Mode - Forced 3:2 Mode - Forced 2:2 Mode - 2:2 Even Mode - 2:2 Odd Mode - Game Mode 1 - Game Mode 2 - Field-Scale - PReP – Off - On - Cadence Detect –...
  • Page 46 Auto AR – Off - On - Auto Color Space – Off - On - Auto Priority – 1-13 Range: Audio Input – Audio 1 - Audio 2 - Audio 3 - Audio 4 - Stereo - HDMI - Off - AV Lipsync –...
  • Page 47 Configuration (OSD MENU ONLY) Test Patterns – Off - Frame Geometry - Brightness/Contrast - Checker board - Vertical Lines - Horizontal Lines - Judder - Color8 Bars75 - Color8 Bars100 - Window IRE10 - Window IRE20 - Window IRE30 - Window IRE40 - Window IRE50 - Window IRE60 -...
  • Page 48 User Mode – Normal - Advanced - Serial Port Rate – 4800bps - 9600bps - 14400bps - 19200bps - 38400bps - 57600bps - Factory Default – Software Update – 12V Trigger Levels (OSD MENU ONLY) Trigger #1 – Normal - Negative - Trigger #2 –...
  • Page 49 1365x768 - 852x576 - 1366x768 (1) - 1366x768 (2) - 1360x768 (1) - 1360x768 (2) - 1280x768 - 1024x1024 - 1024x852 - 1024x768 - 1024x576 - 848x600 - 1365x1024 - 1400x1050 - 1400x788 - 960x540 - 1280x960 - 1440x960 - 1440x1152 - User - USER RESOLUTION CONTROLS:...
  • Page 50 Aspect Ratio (OSD MENU ONLY) Display – 4:3 - 5:4 - 16:9 - 2.35:1 - User - Display User Value – Lens – Mode 1 - Mode 1 “Auto” - Mode 2 - None - Screen – 4:3 - 5:4 - 16:9 - 2.35:1 - User -...
  • Page 51 Output Level – Video - PC - Framerate (OSD MENU ONLY) When input is: 24Hz - NOT YET DEFINED 24Hz Lock - 48Hz Lock - 60Hz Lock - 72Hz Lock - Unlock - 24Hz input, Unlocked output framerate – NOT YET DEFINED Range: When input is: 25Hz - NOT YET DEFINED 25Hz Lock -...
  • Page 52 Border Level – (-16)-(+100) Range: Output Picture Controls (OSD MENU ONLY) Presets – ISF Day Normal - ISF Day Bright - ISF Night - Preset 1 - Preset 2 - Brightness – (-100)-(+100) Range: Contrast – (-100)-(+100) Range: Saturation – (-100)-(+100) Range: Hue –...

  • Page 53: Appendix A. Decimal To Binary To Hex To Ascii Conversion Table

    Appendix A. Decimal to Binary to HEX to ASCII Conversion Table Some ASCII Characters will not be used ever in the iScan communication – these are grayed out for clarity (the entire list is published for the sake of completion). Decimal Binary (MSB)
  • Page 54 0010 0111 0x27 0010 1000 0x28 0010 1001 0x29 0010 1010 0x2A 0010 1011 0x2B 0010 1100 0x2C 0010 1101 0x2D 0010 1110 0x2E 0010 1111 0x2F 0011 0000 0x30 0011 0001 0x31 0011 0010 0x32 0011 0011 0x33 0011 0100 0x34 0011 0101 0x35...
  • Page 55 0101 0100 0x54 0101 0101 0x55 0101 0110 0x56 0101 0111 0x57 0101 1000 0x58 0101 1001 0x59 0101 1010 0x5A 0101 1011 0x5B 0101 1100 0x5C 0101 1101 0x5D 0101 1110 0x5E 0101 1111 0x5F 0110 0000 0x60 0110 0001 0x61 0110 0010 0x62...
  • Page 56 1000 0001 0x81 1000 0010 0x82 1000 0011 0x83 1000 0100 0x84 1000 0101 0x85 1000 0110 0x86 1000 0111 0x87 1000 1000 0x88 1000 1001 0x89 1000 1010 0x8A 1000 1011 0x8B 1000 1100 0x8C 1000 1101 0x8D 1000 1110 0x8E 1000 1111 0x8F...
  • Page 57 1010 1110 0xAE 1010 1111 0xAF 1011 0000 0xB0 1011 0001 0xB1 1011 0010 0xB2 1011 0011 0xB3 1011 0100 0xB4 1011 0101 0xB5 1011 0110 0xB6 1011 0111 0xB7 1011 1000 0xB8 1011 1001 0xB9 1011 1010 0xBA 1011 1011 0xBB 1011 1100 0xBC...
  • Page 58 1101 1011 0xDB 1101 1100 0xDC 1101 1101 0xDD 1101 1110 0xDE 1101 1111 0xDF 1110 0000 0xE0 1110 0001 0xE1 1110 0010 0xE2 1110 0011 0xE3 1110 0100 0xE4 1110 0101 0xE5 1110 0110 0xE6 1110 0111 0xE7 1110 1000 0xE8 1110 1001 0xE9...

  • Page 59: Appendix B - Ir Control White-Paper By Barry Gordon

    Appendix B. Infrared Control White Paper by Barry Gordon Note: This article in Sections 2.1 through 2.5 is reprinted with permission from Barry Gordon. The original article was printed circa 1998, although the information it contains is still very pertinent. We wish to thank Barry for allowing us to reprint the article.
  • Page 60 been pressed (and perhaps even what device this key is for). We first need to simplify the problem so that we don’t have deal with too many "Pulse widths". We can easily do this by representing the number in base 2, or binary. (I apologize if this now gets a little technical, but in reality it already has).
  • Page 61 having them equal. We might choose 48,24 for the "1" and 24,24 for the "0". In fact this is what Sony has done in its IR remotes. [Note: If you work through the numbers you will find that Sony IR signaling uses a sequence of 1200 microseconds of light followed by 600 microseconds of no light to represent a "1";...
  • Page 62 A Burst Pair Sequence usually looks as follows: Lead in Burst Pair The Lead In Burst pair can be thought of as the hello or wake up burst. It tells the receiver to start listening (or rather looking) very closely as what is coming. It is usually of different timing duration than the Burst Pairs in the data part.
  • Page 63 IR Codes The world of IR remotes has become a commodity world. IR remotes (simple ones, not the Pronto) are relatively inexpensive. I bought 5, credit card sized, universal remotes for $10. They are three times as thick as a credit card but the same height and width.
  • Page 64 Let us break it up to decipher it. Preamble Word 1 Word 2 Word 3 Word 4 Word 5,6 Word 7,8 Word 9,10 Word 11,12 Word 13,14 Word 15,16 Word 17,18 Word 19,20 The above is the function code as transmitted it is 0111010. Reversing the string so it is a true binary number with the least significant digit on the right we get 0101110 which in decimal is 46.
  • Page 65 Continuing on to the device code we have: Word 21,22 Word 23,24 Word 25,26 Word 27,28 Word 29,30 Word 31,32 Word 33,34 Word 35,36 Word 37,38 Word 39,40 Word 41,42 Word 43,44 Word 45,46 The device code as transmitted is 0101110010010. Reversing the order to make it a binary number we get 0100100111010.
  • Page 66 NEC IR Code Format Parameter Carrier Frequency Unit of Burst Time Lead In Burst "1" Burst Pattern "0" Burst Pattern Lead Out Doing the arithmetic we see that this code uses a base time of 550 microseconds. The lead in is a unique burst as is the lead out. It is a pulse width modulation system where the information is carried in the length of the off time with a fixed duration of on time.
  • Page 67 If you work out all of the detailed analysis in a manner similar to that shown for the Sony you should determine that the carrier frequency is indeed 40kHz, there are 34 total burst pairs in the one burst sequence used, and the burst sequence is repeatable. The actual 32 bits of data is: 00010101 11101010 01011000 10100111 Looking at the adjacent fields (1 &...

  • Page 68: Appendix C - Help And Support

    Appendix C. Help and Support Thanks for taking the time to read this document. We have tried to cover in easy-to- understand terms, every facet of automation the iScan supports – while attempting at answer every question we’ve ever been asked by customers and installers. However –...

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