Troubleshooting, Oscilloscope displays | Extron electronic VSC 150

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
	290		70
	280		80
A3	270		90
	270		90
	260		100
B1	250		110
	250		110
	240		120
B2	230		130
-40	220		140
B3	210		150
B3	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

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.

Extron electronic VSC 150 Troubleshooting, Oscilloscope displays, Superimposed waveforms

Models: VSC 150