Typical PAL Composite Video Test Signals Used by VM700T

Typical PAL composite video test signals used by VM700T.

A number of common test signals are used for conventional testing of PAL video distribution circuits and equipment. If you are using the VM700T as your measurement instrument, a brief overview of the signal types and the VM700T MEASURE application that uses these is shown below.

Test Signal Used VM700T Measurement mode . Video Output Level CCIR17 Bar Line Time Color Burst Level Any valid color signal H Timing Sync Level Any valid color signal Bar Line Time, H Timing, others. Field Time Distortion Field Square Wave Two Field Long Time Jitter Any valid color signal Jitter Long Time SNR Unweighted 0% pedestal AUTO, Noise Spectrum Luminance NonLinearity CCIR17 Luminance NonLinearity DG CCIR330 DGDP DP CCIR330 DGDP Chroma Amplitude Error CCIR331 Chrominance NonLinearity Chroma Phase Error CCIR331 Chrominance NonLinearity Chroma/Luma Intermod CCIR331 Chrominance NonLinearity Multiburst CCIR18 Multiburst H-Sync Jitter Any valid color signal Jitter 75% Color Bar Vector 75% Color Bar ColorBars, Vector, others Group Delay Sin X/X Group Delay Sin x/x CL Gain CCIR17 ChromLumGainDelay CL Delay CCIR18 ChromLumGainDelay Line Time Dist. CCIR17 Bar Line Time Short Time Distortion Special 1T CCIR17 Short Time Distortion 2T K Factor CCIR17 K Factor Burst Frequency Any valid color signal Burst Frequency SCH Phase Any valid color signal SCH Phase, Auto Bar Tilt CCIR17 Bar Line Time. Color Bar measurements 75% Color Bar ColorBar, Auto, Vector

To assist in quick “sight recognition” of these test signal types, a selection of screen captures from a Tektronix WFM7120 are included in the following images sets. CCIR 17

CCIR 18 CCIR 330

CCIR 331 75% Color Bars (PAL)

SIN X/X Field Square Wave