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Model AC504A & AC504A-CP
8
Figure 3.1
3. Configuration & Operation
The Mini-CAT5 Receivers are equipped with an adjustment to improve
image quality when using long cables. The adjustment is made via a
single turn trim-pot located next to the power connector on the side.
When using a long cable, with no
compensation, any solid horizontal line,
tends to smear to the right. For example
in the image shown on the right, observe
the dark black line at the bottom of the
window and see how it is smearing to
the right (not changing to white abruptly
as it should). This is the effect of long
cable on the signal.
You can turn the trim-pot to eliminate
these streaks as shown on the 2nd
picture. If you add too much
compensation to the signal, then an
opposite effect may be observed, i.e.
black lines smear to the right as white
lines or vice-versa. The 3rd picture
shows the case where too much
compensation is added.
When using long cables, the image
quality is a function of resolution and
refresh rate. Lower resolution or refresh
rate, result in best picture. Therefore it is
best to set the refresh rate to 60 Hz at
any resolution.
Although the Mini-CAT5 extenders are compatible with all varieties of
UTP cable, for best results at long distances, use standard Category-5
Cable (instead of CAT5e or CAT6).
No-Compensation
Perfect Compensation
Too much Compensation