Singmai Electronics SM01 Скачать руководство пользователя страница 37 | Manualshive

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37

Figure 25 The circular 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.  For  example,  in
figure 26, I show a horizontal line of video and you can clearly see that the
left  and  right edges  of  the  waveform  droop,  showing  some  high  frequency
attenuation.

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Содержание SM01

Страница 1: ...1 SM01 Standard Definition Video Encoder and Pattern Generator User Manual Revision 0 5 27 th February 2015 ...

Страница 2: ...ase 25 CCIR330 PAL only 25 N7CMPF NTC 7 Composite NTSC only 26 CCIR17 PAL only 27 2T20TPB 960H only 28 Black 28 White 28 Pedestal 525 line 50 F F 625 line 28 Bounce 29 Sweep 29 FCCMB NTSC only 30 CCIR18 PAL only 30 Multi 960H only 31 N7CMBF NTC 7 Combination NTSC only 32 CCIR331 PAL only 32 Gamut 33 Pathological NTSC PAL only 34 Bowtie 960H only 34 Matrix 35 Zone Plate 36 H sweep V sweep Zone Pl N...

Страница 3: ...ure 6 100 Colour bar waveform 20 Figure 7 SMPTE Colour Bar component waveform 22 Figure 8 SMPTE Reverse colour bars waveform 22 Figure 9 SMPTE Pluge waveform 23 Figure 10 Limit ramp waveform 24 Figure 11 960H 10 step waveform 24 Figure 12 5 step staircase waveform 25 Figure 13 CCIR330 waveform 26 Figure 14 N7CMPF NTC 7 Component Waveform 27 Figure 15 CCIR17 Waveform 28 Figure 16 Sweep Waveform 29 ...

Страница 4: ... 36 PAL 75 colour bars vectors 50 Figure 37 NTSC K_Factor measurement 51 Figure 38 NTSC NTC 7 Luma Chroma delay gain measurement 52 Figure 39 NTSC Differential gain phase measurement 53 Figure 40 NTSC noise measurement Pedestal waveform 54 Figure 41 Luma frequency response CCIR18 test signal 55 Figure 42 Chrominance non linearity using N7C Combination test signal 56 Figure 43 SDI output 525 line f...

Страница 5: ...ontal sweep only formats Patterns available include 75 100 SMPTE Bars Red colour bars Black White 50 grey flat fields 2T 20T and Pulse bar CCIR17 18 330 and 331 FCC Comp and FCC MB N7C MBF and N7C MPF Ramp Multi burst Horizontal up to 12MHz and Vertical Sweeps 5 10 step linearity Pathological SDI test Gamut Bowtie Circular Zone Plate In addition programmable amplitude noise may be added to the CVB...

Страница 6: ...Burst amplitude CVBS Sync amplitude CVBS Black level NTSC Hue Chroma phase CVBS subcarrier frequency YPbPr Luma amplitude YPbPr Chroma amplitude YPbPr Sync amplitude YPbPr Black level SM01 is powered by a universal input power supply and controlled with a simple and intuitive selection menu ...

Страница 7: ...he left hand jack The SM01 input is protected against reverse polarity The converter supplied with the SM01 is a model MW173KB manufactured by SL Power Electronics Corp and provides 9VDC at 3A and accepts AC inputs from 100 240VAC Connect the supplied power cord to the AC DC converter and output DC of the converter to the 9VDC Power In input of the SM01 ...

Страница 8: ...nt under test The CVBS NTSC PAL output is connected to the BNC CVBS Out The specification for the output is shown in Table 1 The composite output specification is detailed in Appendix A Parameter Specification Comments Connector Type BNC Output impedance 75Ω Output return loss 30dB 0 5MHz CVBS output level 1 0V pk pk Nominal peak Y to sync tip for 100 colour bars input Table 1 CVBS output specific...

Страница 9: ... and its specifications are shown in Table 3 The SDI output conforms to the SMPTE 259M specification The SDI output specification is detailed in Appendix A Parameter Specification Comments Connector Type BNC Output impedance 75Ω Fixed termination Output return loss 15dB 50Hz 270MHz Output level 800mV pk pk 10 Jitter 0 2UI Table 3 SDI Output Specifications The serial digital interface SDI input onl...

Страница 10: ...ol Adjust switches the unit between On and Standby by pushing it whilst also adjusting the value of parameters by rotating the knob left or right The central switch Select selects the chosen menu parameter and switches preset parameters between for example on and off After the welcome message SingMai SM01 is displayed for a few seconds the LCD display will show the available top level menus A left...

Страница 11: ...djust control Once you have chosen the setting you require press the Select button to return to the menu choices The Adjust control is also used to set the parameter values Once set the required value press the Select button to retain that value and return to the menu To return to the top level menu scroll down the menu choices using the Adjust control the last one before the up arrow will show Ex...

Страница 12: ...12 Menu control The complete menu structure is shown in Figure 4 Figure 4 SM01 Menu structure ...

Страница 13: ...d for the composite output and 525 line standard for the YPbPr and SDI outputs Default value NTSC J Forces NTSC J output standard for the composite output and 525 line standard for the YPbPr and SDI outputs NTSC J is the Japanese version of NTSC which has no setup and different output levels to NTSC M NTSC443 Forces NTSC443 output standard for the composite output and 525 line standard for the YPb...

Страница 14: ...rd for the composite output and 525 line standard for the YPbPr outputs Note the 960H sampling frequency is 36MHz PAL 960 Forces PAL BG output standard for the composite output and 625 line standard for the YPbPr outputs Note the 960H sampling frequency is 36MHz NTSC128 Forces NTSC M output standard for the composite output and 525 line standard for the YPbPr outputs Note the 1280H sampling freque...

Страница 15: ...rn mode In Encoder mode the pattern menu cannot be selected The patterns available depend on the standard selected Table 5 lists the patterns available for each standard A full description of the patterns can be found in Chapter 4 Table 5 SM01 Patterns ...

Страница 16: ...posite video output Default value is 100 gain of 1 Range 0 130 CVBS S Adjusts the output amplitude of the synchronizing signals of the composite video output Default value is 100 gain of 1 Range is 0 130 CVBS B Adjusts the output black level of the composite video output Default value is pedestal value for NTSC M or 0mV for other standards Default value is 0 offset of 0mV Range is 100 NTSCHue Adju...

Страница 17: ...f the amplitude of white noise injected into the Y output channel of the CVBS analogue output only The range of the control is from 0 off default value to 100 maximum noise A fuller description of the noise generator may be found in Chapter 5 Video V Sync The injected noise white noise is limited to the active video portion of the analogue output waveform Video default value or the entire waveform...

Страница 18: ...espectively of the PAL output standard if enabled VITSOn or the N7CMBF and N7CMPF onto line 17 of fields 1 and 2 respectively of the NTSC standard Default value is VITS on C maOn C maOff Turns off the chroma component of the CVBS output and sets the Pb Pr outputs of the analogue component output to blanking level if set C maOff Default value is chroma on C maOn Exit Returns to the top level menus ...

Страница 19: ...NTSC M PAL M composite output only The colour bar sequence is white yellow cyan green magenta red blue and black Figure 5 75 Component colour bar waveform The output levels for the composite bar waveform are shown below mV NTSC M J PAL M 100 7 5 75 7 5 PAL PAL N 100 0 75 0 Luminance Chrominance Luminance Chrominance White 714 29 714 29 0 00 0 00 700 00 0 00 Yellow 492 62 474 64 443 34 479 29 465 1...

Страница 20: ...erates full frame 100 saturated colour bars with a 100 white bar reference and 7 5 IRE setup for the composite output only The colour bar sequence is white yellow cyan green magenta red blue and black Note that 100 NTSC colour bars will cause clipping in the transmitter and they are therefore only used within a studio closed system Figure 6 100 Colour bar waveform The output levels for the composi...

Страница 21: ...ses 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 The function of these bars is to set monitor chroma gain and phase the red and green monitor outputs are switched off and the monitor hue chroma phase is adjusted to equalize the cyan magneta and magenta cyan vertical transitions T...

Страница 22: ...Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 900 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec Cb Value Dec Cr Value Dec 525 Line Reverse Colour Bars 0 100 200 300 400 500 600 700 800 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 900 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec Cb Value Dec Cr Value Dec ...

Страница 23: ...d Ramp This waveform is a linear modulated ramp and may be used to measure linearity as well as differential gain and phase 525 Line SMPTE Pluge 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec Cb Value Dec Cr Value Dec ...

Страница 24: ...nd may be used to measure linearity as well as differential gain and phase Figure 11 960H 10 step waveform 525 Line Limit ramp 0 200 400 600 800 1000 1200 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 200 400 600 800 1000 1200 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec Cb Value Dec Cr Value Dec ...

Страница 25: ...asure linearity as well as differential gain and phase Figure 12 5 step staircase waveform CCIR330 PAL only This waveform is one of the four PAL vertical interval test signals VITS and comprises a pulse and bar and modulated five step staircase It is used for the measurement of differential gain and phase ...

Страница 26: ...r measuring relative luma to chroma delay and gain and the 5 step staircase is used to measure differential gain the difference in amplitude between each step in the staircase and the colour burst and differential phase the difference in phase between each step in the staircase and the colour burst N7CMPF is one of the NTSC test signals and is inserted on line 17 field 1 of the CVBS output by enab...

Страница 27: ...rement of K factor luma chroma gain delay and luminance linearity The CCIR17 signal is also inserted on line 17 of the output signal by enabling VITSOn in the Setup menu default is on 525 Line N7CMPF 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 900 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec C...

Страница 28: ...ignal that may be used for noise measurements White White is a full frame 100 IRE NTSC M or 700mV PAL video signal that may be used for noise measurements or for finding AC coupling or clamping issues Pedestal 525 line 50 F F 625 line Pedestal is a full frame 50 IRE NTSC or 350mV 50 PAL video signal that may be used for noise measurements The noise measurement of the 625 Line CCIR17 0 100 200 300 ...

Страница 29: ...rm used for testing the system frequency response For PAL NTSC the frequency range is 0 25MHz to 5 75MHz for luma and 0 125MHz to 2 75MHz for chroma For 960H the frequency range is 0 25MHz to 7 75MHz for luma and 0 125MHz to 2 75MHz for chroma Figure 16 Sweep Waveform 525 Line Sweep 0 100 200 300 400 500 600 700 800 900 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 50...

Страница 30: ...urst packets at 0 5MHz 1 0MHz 2 0MHz 3 0MHz 4 8MHz and 5 8MHz of 60 amplitude on a 50 pedestal The CCIR18 signal is inserted on line 18 of the output signal by enabling VITSOn in the Setup menu default is on The frequency response of the SM01 measured with the CCIR18 test signal is shown in Appendix A 525 Line FCCMB 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 Y Pix...

Страница 31: ...0MHz 2 0MHz 4 0MHz 6 0MHz and 7 75MHz The chroma signal comprises 5 packets at 0 5MHz 1 0MHz 1 5MHz 2 0MHz and 2 75MHz 625 Line CCIR18 0 100 200 300 400 500 600 700 800 900 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No YValue Dec Cb Value Dec Cr Value Dec ...

Страница 32: ... Appendix A Figure 19 N7CMBF Component Waveform CCIR331 PAL only The CCIR331 signal is used to measure chroma amplitude and phase errors as well as luma chroma intermodulation It is a vertical interval test signal VITS and is inserted on line 331 of the output signal by enabling VITSOn in the Setup menu default is on 525 Line N7CMBF 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 ...

Страница 33: ...0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 900 1000 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec Cb Value Dec Cr Value Dec 525 Line Gamut 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 500 600 700 800 Y Pixel No 10 bit value 0 100 200 300 400 500 600 700 800 900 0 50 100 150 200 250 300 350 400 Cb Cr Pixel No Y Value Dec...

Страница 34: ... zeros followed by one one This output stresses the equalizer because of its low frequency content The bottom half consists of a repetitive active line pattern of values Y 110h and C 200h This results in an output with 20 zeros followed by 20 ones This bit pattern tests the receiver PLL because of the low transition frequency of edges in the data Bowtie 960H only The Bowtie waveform is used to mea...

Страница 35: ...al comprises five equally spaced patterns in one combination test signal that permits a single test signal analysis of a video component or system The five signals are 75 colour bars 5 step modulated staircase 2T 20T pulse and bar luma multi burst and modulated ramp ...

Страница 36: ...36 Figure 24 Matrix test signal Zone Plate Those involved in optics are probably very familiar with the circular zone plate It is shown in Figure 25 ...

Страница 37: ...e highest frequencies at the edges of the image It can be used to measure the horizontal and vertical frequency response of system For example in figure 26 I show a horizontal line of video and you can clearly see that the left and right edges of the waveform droop showing some high frequency attenuation ...

Страница 38: ... line averaging or issues with a scaler or de interlacer The zone plate is very useful for designing and testing composite analogue video decoders Even a conventional line comb decoder will not be able to separate chominance and luminance of the same frequency because of the non repetitive nature of the pattern each horizontal line is different to the ones adjacent to it This will result in cross ...

Страница 39: ...em in the video processing can be e g it can show us the frequency of an aliasing component The zone plate s use is not just restricted to analogue video decoding Any video processing which manipulates the image spatially and or temporally can be tested to breaking point with the zone plate such processing includes video standards conversion de interlacing and scaling H sweep V sweep Zone Pl NTSC1...

Страница 40: ...PAL1280 only Selects the upper range of the horizontal frequency sweep this option cannot be selected in vertical sweep or zone plate mode The range is 0Hz flat field to 12 0MHz in 0 1MHz steps The default value is 1 0MHz ...

Страница 41: ...ponent of the composite output The noise can be added to the entire video signal including the sync and blanking or just to the active video using the Video Video S select option The maximum noise setting adds approximately 50dB of noise to the signal The second noise generator is a programmable frequency 50Hz or 60Hz hum generator Figure 28 shows the hum generator on the CVBS output across a fram...

Страница 42: ...k Porch 5 8us 4 5us Equalising Pulse width 2 35us 2 3us Broad Pulse width 27 3us 27 0775us Rise Fall times of sync edges 250ns 250ns NTSC PAL M rise time should be 140ns Sync Pulse amplitude 300mV 40IRE Luminance white bar amplitude 700mV 100IRE Vertical Sync Group 7 5 lines 9 lines No of equalizing pulses 5 5 6 6 Chrominance Phase error 1deg 1 5deg Subcarrier Frequency 4 43361875MHz PAL 3 5820562...

Страница 43: ...deg Sin x x corrected K Factor 2T 1 1 Chrominance luminance delay 5ns 5ns Signal to Noise ratio 70dB 50 grey input 70dB 50 grey Unweighted Table 8 NTSC PAL timing specifications The measured horizontal and vertical output timings for PAL and NTSC composite outputs are shown in Figures 29 to 32 Figure 29 PAL horizontal timing composite output ...

Страница 44: ...44 Figure 30 PAL vertical timing composite output ...

Страница 45: ...45 Figure 31 NTSC Horizontal timing composite output ...

Страница 46: ...NTSC Vertical timing composite output Figure 33 below shows the 75 colour bar composite output of the SM01 compared with the reference levels of the Tektronix VM700 and the corresponding vector diagram in Figure 34 ...

Страница 47: ...47 Figure 33 NTSC 75 colour bar composite output ...

Страница 48: ...48 Figure 34 NTSC 75 colour bars vectors ...

Страница 49: ...49 Figure 35 PAL 75 colour bars composite output ...

Страница 50: ...50 Figure 36 PAL 75 colour bars vectors Figure 37 shows the K factor 2T pulse distortion measurement for the SM01 measured on a Tektronix VM700 using the NTC 7 Composite test signal ...

Страница 51: ...51 Figure 37 NTSC K_Factor measurement Figure 38 shows the luma chroma delay and gain measurement for the SM01 measured on a VM700 using the NTC 7 Composite test signal ...

Страница 52: ...52 Figure 38 NTSC NTC 7 Luma Chroma delay gain measurement Figure 39 shows the differential gain and phase measurements for the SM01 measured using the Tektronix VM700 on the NTC 7 waveform ...

Страница 53: ...53 Figure 39 NTSC Differential gain phase measurement ...

Страница 54: ...54 Figure 40 NTSC noise measurement Pedestal waveform ...

Страница 55: ...55 Figure 41 Luma frequency response CCIR18 test signal ...

Страница 56: ...56 Figure 42 Chrominance non linearity using N7C Combination test signal The SDI output measurements measured using a Tektronix WFM700M are shown in Figures 43 to 46 ...

Страница 57: ...57 Figure 43 SDI output 525 line format measurement Figure 44 SDI output 625 line format measurement ...

Страница 58: ...58 Figure 45 SDI output 625 line eye pattern ...

Страница 59: ...59 Figure 46 SDI output 625 line jitter measurement ...

Страница 60: ...rter supplied with the SM01 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 SM01 The detailed specification is shown below Figure 47 AC DC converter specification Page 1 ...

Страница 61: ...61 Figure 48 AC DC converter specification Page 2 ...

Страница 62: ...62 Figure 49 AC DC converter specification Page 3 ...

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