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      Read first line info block
      • 13 Jan 2024
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      Contents

      Read first line info block

      • Updated on 13 Jan 2024
      • 1 Minute to read
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      Article Summary

      Decoding of the first line info block

      Pixel01234567891011121314151617181920212223
      Line 0MarkerSerial numberMarkerImage countExposure timeMarkerLine timeEncoder clocksError codeTime stampMarker

      Serial number

      Structure

      The serial number consists of two parts.

      SN first partSN second part
      Byte 3Byte 2Byte 1Byte 0
      Px1Px2Px3Px4

      Decoding

      The decoding of the serial number is:

      The first part of the serial number S1 = Px1 × 256 + Px2

      The second part of the serial number S2 = Px3 × 256 + Px4

      Example

      S1 = 156 × 256 + 64 = 40000

      S2 = 0 × 256 + 157 = 157 

      svg-read first line-serial number_03Example: decoding of SN: 40000-00157

      Image count

      Structure

      Image count
      Byte 1Byte 0
      Px6Px7

      Decoding

      The decoding of the image count is:

      Ic = Px6 × 256 + Px7

      Example

      Ic = 1 × 256 + 120 = 376

      svg-read first line-image count_03Example: image count 376

      Exposure time

      Structure

      Exposure time clocks
      Byte 1Byte 0
      Px8Px9

      Decoding

      The decoding of the exposure time is:

      Et = (Px8 × 256 + Px9) / fa

      fa (10k, 15k) = 50 Mhz

      fa (8k) = 80 Mhz

      Example

      Et = (5 × 256 + 220) / 50 = 50 µs

      svg-read first line-exposure time_03Example: Decoding of exposure time

      Line time

      Structure

      Line time clocks
      Byte 2Byte 1Byte 0
      Px11Px12Px13

      Decoding

      The decoding of the Line time is:

      Lt = (Px11 × 216 + Px12 × 28 + Px13) / 100

      Example

      Lt = (0 × 216 + 21 × 28 + 124) / 100 = 55 µs

      svg-read first line-line time_03Example: Decoding of line time

      Encoder clocks

      Structure

      Encoder clocks
      Byte 3Byte 2Byte 1Byte 0
      Px14Px15Px16Px17

      Decoding

      The decoding of the encoder clocks is:

      Ec = Px14 × 232 + Px15 × 216 + Px16 × 28 + Px17

      Time stamp

      Structure

      Time [s]Time [¼ ms]
      Byte 2Byte 1Byte 0
      Px19Px20Px21

      Decoding

      The decoding of the time stamp is:

      Ts = (Px19 × 216 + Px20 × 28 + Px21) / 4

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