VECTORSCOPE

Presented By:J K Shree

Introduction

17 October 1989, invented to examine color TV signals-John L Judge

A vectorscope-special type of oscilloscope-similar to oscilloscopes operated in X-Y mode;

Used in both audio and video applications, mainly to measure the color information in a video image.

Construction & Working

Older vectorscopes-implemented-CRTs

Graticule was often implemented as a silk-screened-superimposed over the front surface of the CRT.

Modern instruments have graticules drawn using computer graphics.

Both graticule and trace are rendered on an external VGA monitor or an internal VGA-compatible LCD display.

It is the overall distribution of color in image against a circular scale.

In audio applications: measure the difference between channels of stereo audio signals.

One stereo channel drives the horizontal deflection of the display, and the other drives the vertical deflection

Types - Depending On Color

1. Luma: Black and White or any 2 colors

2. Chroma: Color

Depending On Display Type

1. Polar Sample Vectorscope

2. Polar Level Vectorscope

3. Lissajous Vectorscope

Manufacturers(Cost: Rs. 15000 to 50000)

Sl. No. Manufacturer Model Number Diagram

1 Textronix 1721 (1720 Series)

2 Leader L900A

3 ikan IK450

Manufacturers….Sl. No Manufacturer Model Number Diagram

4 Feelworld FW789

5 Qualis Audio

6 Blackmagic Ultra Scope-Software

Specification (Textronix 1730 series)

CRT Viewing Area 80 x 100 mmTrace Rotation 8° range, typicalGraticule Internal scale with variable illumination

Power SourceMain Voltage Ranges 115V, 90-132V, 230V, 200-250VMains Frequency Range 48Hz to 66HzPower Consumption 25 watts (85 BTU/HR) maximum

EnvironmentalTemperature Nonoperating: -55°C to +75°C

Operating: To 5,500M (15,000 ft)Altitude Nonoperating: To 18,000 M (50,000 ft)

Operating: To 5,500M (15,000 ft)Physical Characteristics

Dimensions mm in.

Height 133.4 5.25Width 215.9 8.5Length 460.4 8.125Weight kg lb.Approximately 3.8 8.5

Usage Modes• External Audio

Input Mode• Audiobus Filter

Mode

Applications• Identifying issues in the stereo image• Checking phase and stereo balance issues• Calibrating preamp, compressor and other external

processors' gains for optimal stereo recording, mixing, etc.

• Special uses:Used to check channel identification i.e., phase compatibility and rotation(inverse) by clicking phase button.Offset or delay of individual bands-Offset button.Used to clip any unwanted signals.

• And much more....!!!

Images for ApplicationsAudio Monitoring Live Shooting

Chrominance level Waveform Control

Available Installer

Conclusion

• Now a days apps are being developed for monitoring video and audio.

• Software are available for audio recording and measuring chrominance level in video.

• This technology is being available in OS (built in).

THANK YOU