Setup guide — cveq/sveq 100 series (cont’d), Troubleshooting, Step 6 — adjust video gain and equalization – Extron Electronics CVEQ_SVEQ 100 Series Setup Guide User Manual
Page 2: Step 7 — mount the line driver, If the image does not appear or there is no sound, If the image is not displayed properly
Setup Guide — CVEQ/SVEQ 100 Series (cont’d)
Step 6 — Adjust video gain and equalization
While watching the display, adjust the video gain and equalization by using the rotary
gain and equalization (EQ) control potentiometers (see figure 2). Make all adjustments
using a small screwdriver. For a more precise setting, use an oscilloscope or a waveform
monitor connected to the far end of the output cable.
CVEQ 100 Series
SVEQ 100 Series
If using very short output cables:
•
Set all potentiometers to the default setting (the arrow on the control pointing to the
dot beside it, as shown in figure 2).
If using longer output cables:
•
Supply the color bars test signal to the input (Recommendation: use an Extron
VTG 300 Video Test Generator to generate the test signal).
•
Adjust the gain control(s) for the output until the signal level at the far end is the
same as the input (or the display shows the correct brightness and contrast).
•
Adjust the EQ control for the output so that no overshoot or round front corner
appears at the far end on the oscilloscope or you see a sharp picture with no
smearing.
Step 7 — Mount the line driver
Make any cabling adjustments before mounting the line driver, as the cables may be
inaccessible afterwards. If necessary, mount the line driver. For mounting information, see
“Installation Instructions” in the CVEQ/SVEQ 100 Series User’s Manual.
Troubleshooting
If the image does not appear or there is no sound
•
Make sure that all of the devices are powered on.
•
Ensure that the connectors are wired correctly at both ends of the cables. Audio
cables must be wired for an unbalanced stereo input signal and for the appropriate
(unbalanced or balanced) output signal.
•
Check the manuals of the output and input devices or contact Extron to determine if
there are special requirements to output video to the external video port.
If the image is not displayed properly
•
If the picture is too bright or too dark, if the edges of the image seem to exceed their
boundaries, or if thin lines and sharp edges look thick and fuzzy, adjust the gain
setting.
•
If the picture appears and is stable, but it has ghosting or blooming, verify that the
video input is properly terminated. If the problem is not resolved by changing the
termination, try using a different input cable. Poor quality or damaged cable can
cause ghosting and blooming.
If pr
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Figure 2 – Equalization and gain controls