Extron electronic VSC 150 Troubleshooting, Oscilloscope displays, Superimposed waveforms

Page 14

Installation and Operation, cont’d

10. Check the display(s) for proper colors and for undesirable artifacts in the image(s). Make adjustments as necessary. Once the genlock timing has been adjusted, it should not require readjustment when changing to a new computer video signal input.

11. If other VSC 150s are part of this genlock daisy chain, connect the oscilloscope to each device, and repeat this procedure.

Oscilloscope displays

What you see on the oscilloscope while adjusting the

VSC 150 to match the genlock signal depends on the type of signal used, the type of oscilloscope, and the procedure the scope requires. This section shows some examples of oscilloscope displays.

The figure below shows the genlock input signal (top) and an out-of-alignment NTSC composite sync output signal (bottom) displayed on a waveform monitor to check for alignment. When the phases are aligned, the wave peaks on the bottom waveform should line up with those in the reference signal above it.

With this method there is no way to know if the signals are 180º out of phase. A delayed sweep on a time-based scope would allow a more accurate display of the input and output signal phase relationships.

Superimposed waveforms

A vectorscope is more accurate than a waveform monitor. The next figure shows an example of a vectorscope display when the horizontal phase is adjusted to align it with the burst (genlock) vector. Adjust the Horz Phase control until the difference between the two vectors is 0º. This example

shows black burst only (with no color). The burst vector is pointing to the left from the center.

350

0

10

340

 

20

330

 

30

320

 

40

310

 

50

300

 

60

290

 

70

280

 

80

270

 

90

260

 

100

250

 

110

240

 

120

230

 

130

220

 

140

210

 

150

200160

190 180 170

Vectorscope screen during horizontal phase adjustment

The figure below shows an example of a view of a vectorscope during adjustment of the color subcarrier phase (SC/H). The subcarrier phase should be aligned to 0º (indicated in the figure by the triangle).

350

0

10

340

 

20

330

 

30

A1+40

320

 

40

 

310

 

50

 

300

 

60

A2

290

 

70

 

 

 

280

 

80

A3

270

 

90

 

 

 

260

 

100

B1

250

 

110

 

 

 

240

 

120

B2

230

 

130

-40

220

 

140

B3

210

 

150

200

 

160

 

190

180

170

Vectorscope screen during

color subcarrier phase adjustment

Troubleshooting

The image should appear properly on the screen(s).

If the image does not appear

1.

Ensure that all devices are plugged in.

2.

Make sure that each device is receiving power.

3.

Check the cabling, wiring and grounding, and make

 

adjustments as needed. Ensure that the rear panel

 

output selection toggle switch and PAL Out DIP switch

2-16 VSC 150 • Installation and Operation

VSC 150 • Installation and Operation 2-17

Page 13 Page 15
Image 14
Page 13 Page 15
Contents User’s Manual Scan ConverterFCC Class a Notice PrecautionsExtron’s Warranty Table of Contents Introduction Table of Contents, cont’dOne VSCAbout this Manual FeaturesIntroduction About the VSCIntroduction, cont’d Installation and OperationTwo Tabletop/desktop placement Installation and OperationInstallation Overview Mounting the VSCInstallation and Operation, cont’d Front Panel Features Installation and Operation, cont’d Rear Panel FeaturesCabling Mac-VGA cable local monitor connectionsTypical VSC 150 system application Connecting genlock cables in a daisy chainVideo output BNC cable connections Vertical interval switching setup Setting Up Genlock Vertical Interval SwitchingMac-HV/VGA cable connector pin assignments VGA 15-pin HD and Mac 15-pin D connector pin locationsGenlock setup Cable connections for genlock setupVectorscope screen during Color subcarrier phase adjustment TroubleshootingVectorscope screen during horizontal phase adjustment Oscilloscope displaysIf the image does not display correctly Symptoms Solutions Remote Control ThreeRemote Control RS-232 Remote ControlRemote Control, cont’d Command/response tableVSC and DDS Control Program window IR Remote ControlControl software for Windows IR 601 remoteAAppendix Specifications Accessories and Part NumbersUsing the memory feature Specifications Included Parts Accessories and Part NumbersAccessories Accessories and Part Numbers, cont’d

VSC 150 specifications

The Extron VSC 150 is a versatile video scaling and conversion device designed for professional audio-visual applications. It is particularly well-suited for environments requiring high-quality image processing and flexible video interfacing. With its array of features and advanced technologies, the VSC 150 stands out as a reliable solution for various AV setups, including classrooms, conference rooms, and large venues.

One of the key features of the VSC 150 is its high-performance video scaling technology. It offers up to 16 different output resolutions, allowing users to adapt video signals to meet the specific needs of different display devices. This flexibility ensures that content is delivered in the optimal resolution for every environment, enhancing the overall viewing experience. The device supports a wide variety of input formats, including composite video, S-video, and component video, ensuring compatibility with legacy equipment as well as contemporary digital sources.

The VSC 150 also incorporates advanced signal processing capabilities. It includes features such as video noise reduction, dynamic range control, and edge enhancement. These technologies work in unison to improve image quality, providing sharp, clear visuals that are critical in professional settings. The built-in image freeze and zoom functions further enhance the user experience, allowing for focused presentations without losing attention.

Another notable characteristic of the VSC 150 is its user-friendly interface. The device features an easy-to-navigate front panel, complete with LED indicators for quick status monitoring. Additionally, it can be controlled remotely via Ethernet or RS-232, providing flexibility in larger setups where direct access may be limited. The integration into control systems is seamless, making it a popular choice for custom AV installations.

In terms of audio capabilities, the VSC 150 can handle both analog and digital audio signals, ensuring that users can maintain high-quality audio alongside video content. It also features audio embedding and de-embedding options, which facilitate integration with various audio systems.

Overall, the Extron VSC 150 is a powerful and sophisticated video scaler that combines excellent performance, robust features, and ease of use. It is an ideal choice for professionals seeking a reliable solution for managing video content in diverse AV environments, effectively meeting the demands of modern presentations and displays. With the VSC 150, users can achieve impressive results, ensuring that their visual communications stand out.
Top Page Image Contents