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Singmai Electronics SM02 User Manual

High definition video encoder and pattern generator
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SM02
High Definition Video Encoder
and
Pattern Generator
User Manual
Revision 0.1
th
15
March 2015
1

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Summary of Contents for Singmai Electronics SM02

  • Page 1 SM02 High Definition Video Encoder Pattern Generator User Manual Revision 0.1 March 2015...

  • Page 2: Table Of Contents

    Contents ......................2 Tables ......................2 Figures ......................3 Introduction ................... 4 aCVi Overview ..................6 Connecting up the SM02 ..............8 Quick Start Guide ................11 Switch On and Control ................11 Menu control ................... 13 SM02 Patterns ..................21 75% Colour bars ..................

  • Page 3: Figures

    Figure 1 aCVi Spectrum................7 Figure 2 SM02 rear panel................8 Figure 3 SM02 AC-DC converter ..............9 Figure 4 SM02 Front panel................. 11 Figure 5 SM02 Menu structure..............13 Figure 6 aCVi output, 30MHz sweep (Pre-emphasis = minimum)..... 19 Figure 7 aCVi output, 30MHz sweep (Pre-emphasis = maximum).

  • Page 4: Introduction

    In addition programmable amplitude white noise and/or 50Hz or 60Hz hum may be added to the YPbPr (Y channel) and aCVi outputs. As a video encoder SM02 accepts SMPTE-272M inputs at any of the above standards which it encodes to simultaneous HD-SDI (SMPTE-272M), YPbPr component and aCVi outputs.
  • Page 5 Sync amplitude  aCVi Black level  YPbPr Luma amplitude  YPbPr Pb/Pr amplitude  YPbPr Sync amplitude  YPbPr Black level SM02 is powered by a universal input power supply and controlled with a simple and intuitive selection menu.

  • Page 6: Acvi Overview

    2. aCVi Overview The following is a brief overview of the aCVi interface. The basic concept of the aCVi interface is to build on the proven and reliable transport method of NTSC, (the advantages of PAL – v.v. multi-path reception – is not relevant to a cable system so NTSC is used as the model).

  • Page 7: Figure 1 Acvi Spectrum

    A further improvement in the SNR is achieved through transmitting a peak to peak video level of 1.5V which maintains compatibility with any legacy SD equipment on the network and also allows common low-power 5V drivers to be used. Figure 1 aCVi Spectrum. ACVi also allows for the bidirectional transfer of data between receiver and transmitter.

  • Page 8: Connecting Up The Sm02

    3. Connecting up the SM02 All connections to the SM02 are made via the rear panel: see Figure 2. Figure 2 SM02 rear panel. The AC-DC converter connects to the left hand jack. The SM02 input is protected against reverse polarity and is fused against internal short circuits or overloads.

  • Page 9: Table 1 Acvi Output Specification

    A full specification for the supplied AC-DC converter may be found in Appendix A. The SM02 provides both analogue and digital component outputs for connecting to the equipment under test. The aCVi output is connected to the BNC, ‘aCVi Out’. The specification for the output is shown in Table 1.

  • Page 10: Table 2 Analogue Component Output Specifications

    Parameter Specification Comments Connector Type 75Ω Output impedance Output return loss >30dB 0-5MHz Y output level 1.0V pk.pk Nominal 100% colour bars input Cb/Cr output levels ±350mV pk-pk Nominal 100% colour bars input Table 2 Analogue Component output Specifications The serial digital interface (HD-SDI) output is connected to the ‘HD SDI Out’ BNC and its specifications are shown in Table 3.

  • Page 11: Quick Start Guide

    Connect the AC supply to a local AC supply between 110-240VAC. The Standby LED should light. Push the Adjust control and the unit will switch on and the welcome message will be displayed (SingMai SM02). To switch off the SM02 push the Adjust control again.
  • Page 12 To change a parameter within the lower menu choices choose the required item by aligning the left arrow with it and press the Select button. The parameter will either toggle between the available options (e.g. On or Off) or will show a menu bar where to can select more options via the Adjust control.

  • Page 13: Menu Control

    Menu control The complete menu structure is shown in Figure 4. Figure 5 SM02 Menu structure.
  • Page 14 The following is a brief description of the menu functions. HDSDI in: Pattern (Encoder) Each button press toggles between the internal patterns (Pattern – default value) and the serial digital (HD-SDI) input (Encoder). Exit Returns to the top level menus. Stand’d (Standard): In Encoder mode the HD-SDI input standard must match the output standard selection.
  • Page 15 1080p/25 Forces 1080p/25Hz output standard for the HD-SDI, YPbPr and aCVi outputs. 1080p/29 Forces 1080p/29.97Hz output standard for the HD-SDI, YPbPr and aCVi outputs. (Pixel clock frequency is 74. 74.17582418MHz.) 1080p/30 Forces 1080p/24Hz output standard for the HD-SDI, YPbPr and aCVi outputs.

  • Page 16: Table 5 Sm02 Patterns

    Table 5 SM02 Patterns. P’meter (Parameter): Note that some combinations of the parameter setting can give invalid outputs and may result in clipping of the signal. aCVi Adjusts the output amplitude of the composite aCVi video output. Default value is 100% (gain of 1). Range is 0-130%.
  • Page 17 aCVi-C Adjusts the output amplitude of the chroma component of the aCVi video output. Default value is 100% (gain of 1). Range 0-130%. Burst Adjusts the output amplitude of the colour burst of the aCVi video output. Default value is 100% (gain of 1). Range 0-130%. aCVi-S Adjusts the output amplitude of the synchronizing signals of the aCVi video output.
  • Page 18 Noise: Y Noise Selects a sub menu which allows control of the amplitude of white noise injected into the Y output channel of the YPbPr analogue output and the Y component of the aCVi composite video output. The range of the control is from 0 (off –...

  • Page 19: Figure 6 Acvi Output, 30Mhz Sweep (Pre-Emphasis = Minimum)

    aCVi Rx Displays the received ID and data words from the aCVi receiver (if present). aCVi PE Manual control of the pre-emphasis filter for the aCVi interface. The value is between 0 (minimum) and 255 (maximum). The degree of pre-emphasis set is dependent on the cable length and is designed to approximately compensate for the high frequency loss of >300m of RG-59 or UTP cable.

  • Page 20: Figure 7 Acvi Output, 30Mhz Sweep (Pre-Emphasis = Maximum)

    Figure 7 aCVi output, 30MHz sweep (Pre-emphasis = maximum). Exit Returns to the top level menus.

  • Page 21: Sm02 Patterns

    5. SM02 Patterns Below is a detailed description of each of the SM02 patterns. 75% Colour bars 75% colour bars are used for measuring insertion gain, chroma level and chroma gain and for monitor alignment. The SM02 generates full frame 75% saturated colour bars with a 100% white bar reference.

  • Page 22: Smpte Colour Bars

    Figure 9 100% Colour bar waveform. SMPTE Colour bars 67% of the SMPTE colour bar waveform comprises 75% colour bars; white, yellow, cyan, green, magenta, red and blue. Below this and comprising 8% of the frame, is a sequence of blue, black, magenta, black, cyan, black, white bars.

  • Page 23: Figure 10 Smpte Colour Bar Component Waveform

    Figure 10 SMPTE Colour Bar component waveform. Figure 11 SMPTE Reverse colour bars waveform.

  • Page 24: Ramp

    Figure 12 SMPTE Pluge waveform. Ramp This waveform is a linear modulated ramp and may be used to measure linearity or signal to noise ratio. Figure 13 Limit ramp waveform.

  • Page 25: 5-Step Staircase

    5-step staircase This waveform is five, equal amplitude, steps of luma and chroma and may be used to measure linearity. Figure 14 10-step waveform. 2T30T This waveform is a pulse/bar waveform consisting of a 2T wide pulse, a 12.5T wide pulse, a 30T wide pulse and a white bar. This test signal is used to measure the pulse response of the video path where ringing of pulses, or asymmetry indicate possible problems.

  • Page 26: Multiburst

    Figure 15 2T30T pulse waveform. Multiburst The Multiburst waveform is used to measure frequency response. It consists of a reference amplitude bar and six packets of 5MHz, 10MHz, 15MHz, 20MHz, 25MHz and 30MHz for the luma channel and 2.5MHz, 5MHz, 7.5MHz, 10MHz, 12.5MHz and 15MHz for the chroma channels. Figure 16 Multiburst waveform.

  • Page 27: 15Mhzsw

    15MHzSw This waveform is a 1MHz to 15MHz frequency sweep for the luma channel, and a 0.5MHz to 7.5MHz frequency sweep for the chroma channels. Figure 17 15MHz frequency sweep waveform. 30MHzSw This waveform is a 1MHz to 30MHz frequency sweep for the luma channel, and a 0.5MHz to 15MHz frequency sweep for the chroma channels.

  • Page 28: Black

    Figure 18 30MHz sweep waveform. Figure 19 30MHz sweep markers. Black Black is a full frame 0mV luma only video signal that may be used for noise measurements. White White is a full frame 700mV luma only video signal that may be used for noise measurements or for finding AC coupling or clamping issues.

  • Page 29: 50%Grey

    50%Grey Pedestal is a full frame 350mV luma only video signal that may be used for noise measurements. Red is a full frame 75% saturated red video signal. Green Green is a full frame 75% saturated green video signal. Blue Blue is a full frame 75% saturated blue video signal.

  • Page 30: Zone Plate

    Figure 20 Matrix test signal. Zone Plate The zone plate is a two-dimensional linear frequency sweep with the highest frequencies at the edges of the image. It can be used to measure the horizontal and vertical frequency response of system. Attenuation on the left and right edges of the image show low pass filtering of the image;...

  • Page 31: Figure 21 . Left Side: The Zone Plate Shows Flickering Colours At The

    Figure 21 . Left side: The zone plate shows flickering colours at the subcarrier frequency because of crosstalk between the luma and the chroma. Right side: No crosstalk issues.

  • Page 32: Sm02 Noise Generator

    5. SM02 Noise generator SM02 has two noise generators that can add noise to the CVBS output. The first of these uses a pseudo-random number generator to create white noise. A programmable amount of this noise is added to the luma component of the composite output.

  • Page 33: Acvi Data Transfer Protocol

    6. aCVi Data transfer protocol The aCVi interface allows for the bi-directional transmission of control data between the transmitter and receiver. The data is transferred during to two dedicated lines of the vertical blanking interval, one for transmitter to receiver transmission, the other for receiver to transmitter. One byte of data is sent for each line, allowing a maximum of 60 bytes to be transferred each second, (for a 60Hz frame rate).

  • Page 34: Table 6 Acvi Control Words Transmitter > Receiver

    Function Video standard 0 = 720p25 1 = 720p30 2 = 720p50 3 = 720p59 4 = 720p60 5 = 1080p24 6 = 1080p25 7 = 1080p29 8 = 1080p30 9 = 1080i50 10 = 1080i59 11 = 1080i60 User defined. User defined.
  • Page 35 The total data sequence length is just under 12µs and it should be positioned centrally in the active video period, although the exact position is not important. The pre-defined video lines used for the transfer of data are the same for all standards.

  • Page 36: Appendix A: Power Supply Specification

    The AC-DC converter supplied with the SM02 is a model MW173KB from SL Power Electronics Corporation. It accepts all AC inputs from 100- 240VAC and provides a 9V, 3A DC output for the SM02. The detailed specification is shown below.

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