TSG-50 NTSC Test Patterns

 

See All Patterns

Black Burst    Screen Shot

Black burst (also called blackburst or color black) is commonly used to synchronize video equipment, pre-stripe (black) video tapes, and perform noise measurements. This signal consists of both horizontal and vertical timing information as well as a sample of the NTSC or PAL color subcarrier. The color subcarrier, or color burst, provides a phase and frequency reference for accurate and consistent processing of color images.

  • Setup (Black) Level:    7.5 IRE

  • Peak- Peak Amplitude:    60 IRE (428.57 mV)

Full Field EIA RS-189A Color Bars    Screen Shot

Full field color bars are used for general amplitude and timing measurements. It is the most widely available signal used in all aspects of system setup and testing. The pattern consists of an array of both primary (red, green, and blue) and secondary (cyan, magenta, and yellow) color bars.

SMPTE EG-1-1990 Color Bars    Screen Shot

The top portion of the SMPTE or Split Field color bar signal  is the same as EIA color bars.  The lower portion adds chrominance and luminance bar patterns for visually setting  the brightness, contrast, hue, and saturation levels on color monitors.   

Multi Burst of Frequencies    Screen Shot

The Multi Burst signal contains packets of six different frequencies for basic luminance and chrominance frequency response checks of equipment and distribution paths. It is used to detect high frequency roll off which results in a loss of picture detail or high frequency peaking which can add noise to the image. 

  • White Reference Amplitude: 100 IRE ±1 IRE

  • Burst Frequencies: 0.5, 1, 2, 3, 3.58, and 4.2 MHz

  • Packet Amplitudes: 50 IRE (25-75 IRE)

  • Packet Matching Error: <2% (1 IRE)

  • Packet Rise time: 0.5 MHz 140 nS, all others 400 nS. 

Horizontal Line Frequency Sweep    Screen Shot

This continuous frequency sweep of video passband with embedded markers provides for detailed frequency response testing of luminance and chrominance distribution paths.

  • Sweep Range: 0.5 to 5 MHz

  • Sweep Amplitude: 50 IRE (25-75 IRE)

  • Sweep Amplitude Error: <2% (1 IRE)

  • Markers: Cycle count markers at 1, 2, 3, and 4 MHz points

  • Marker Amplitude: 100 IRE 

NTC-7 Composite    Screen Shot

This composite signal is composed of a 100 IRE bar, a 2T pulse, a 12.5T chrominance pulse, and a modulated 5 step staircase as specified in the ANSI T1.502-1988 Standard for Telecommunications. It is widely used when performing amplitude, phase, and some distortion measurements. It is particularly useful when measuring differential gain and differential phase errors which cause the color content of an image to change with the image brightness.

  • White Bar Amplitude: 100 IRE

  • 2T Pulse HAD: 250 nS ±25nS

  • 2T Pulse Ringing: <2% peak

  • Chrominance Phase: -180 deg (same as burst) 

5-Step Luminance Gray Scale    Screen Shot

Also known as a 5-Step Staircase, this unmodulated (no chrominance) luminance staircase of 5 steps from black to white is used to perform differential gain (see also NTC7 Composite) and luminance linearity measurements. Luminance linearity is the degree of consistency with which a monitor or other device processes the brightness of an image across a range of signal levels. Nonlinear distortion errors result in a loss of fine picture detail.

  • Maximum Amplitude: 100 IRE

  • Step Amplitude: 20 IRE Step

  • Step Matching Error: <1% (Linearity Error)  

5-Step Staircase with Chroma Modulation    Screen Shot

Same uses as 5-STEP but chroma modulation allows measurement of differential phase error (see also NTC7 Composite).

  • Luminance amplitude and linearity error same as 5-Step

  • Chrominance Amplitude: 40 IRE

  • Chrominance Phase:  -180 Degrees (same as burst)

  • Diff Gain Error: 1.5% maximum

  • Diff Phase Error: 1.5º maximum 

Pulse and Bar with Window    Screen Shot

This pattern consists of a 12.5T modulated pulse, a 2T luminance only pulse, and a 100 IRE Window. It is commonly used for amplitude, timing, and distortion measurements. The modulated pulse portion tests chrominance-to-luminance gain and delay. The 2T pulse can be used to measure the K factor, an indicator of linear distortion that affects overall picture quality. The window portion tests the monitor's DC restoration, scan distortion, and other low frequency distortions that cause ringing, smearing, or streaking.

  • 2T Pulse HAD: 250 ±25nS

  • 2T Pulse Ringing: <2% peak

  • 12-1/2 T Pulse Phase:

  • White Bar Amplitude: 100 IRE

  • Window Timing: Lines 72 to 202

  • Field Tilt: <.5%

  • Line Tilt: <.5% 

Red Field    Screen Shot

Also called Red Purity, a full raster of red is used for performing monitor purity adjustments. It is used to visually detect noise produced or injected by the monitor.

  • Luminance Amplitude:         28 IRE

  • Chrominance Amplitude:     88 IRE

  • Chrominance Phase:           103º 

Convergence    Screen Shot

This horizontal and vertical crosshatch pattern for checking and performing video monitor static and dynamic convergence adjustments. It ensures the red, green, and blue electron beams are aligned correctly to color ghosts or in extreme cases, individual colored lines or pixels. It provides a visual means to detect linearity problems which can give an image a bowed or otherwise distorted appearance. Dark markers at 90% point of the scanned image define the SMPTE RP 27.3 "safe action" area. It also features a center dot and center H and V lines.

  • Amplitude:    77 IRE

  • Pattern:         13 horizontal (with equivalent 14H spacing) and 17 vertical lines per field

  • Pulse HAD:   225 nS ±25 nS 

Monitor Matrix    Screen Shot

Combination of monitor test and adjustment patterns for observing overall monitor performance.

Matrix sequence:

  • Convergence

  • Multiburst

  • 5-Step

  • NTC-7

  • Convergence

  • SMPTE bars

  • Convergence

 

All HORITA products come with an unconditional 30-day money back guarantee
and a three year parts and labor warranty

 

Home