MTP SW6 • Installation and Opeation
Installation and Operation, cont’d
2-16
MTP SW6 • Installation and Opeation
2-17
Most MTP transmitters and the MTP SW6 output have a pre-
peaking feature.
Set these features as follows for the best image quality:
1. For inputs from MTP T 15HD products only — If the
cable between the MTP transmitter and the MTP SW6
is > 300', turn the transmitter’s Pre-Peak switch on. For
shorter cables, turn the switch off.
2. For the output — If the cable between the MTP SW6 and
the receiver is > 300', turn the switcher’s Pre-Peak switch
on. For shorter cables, turn the switch off.
N Unless the TP cable lengths are changed, these settings
should need to be made only once, during installation.
Level/peaking setting
1. Connect an oscilloscope (preferred) or a monitor
(acceptable) to the switcher's output via a very short
(<25' [7.5 m]) TP cable and a compatible MTP receiver).
2. If using an oscilloscope, apply a white eld test pattern to
the input to be optimized via an MTP transmitter.
If using a monitor, apply a grayscale or Color Bars
test pattern to the input to be optimized via an MTP
transmitter.
H The Extron VTG 300 or VTG 400 are recommended to
provide the test pattern.
3. Select the input to be optimized.
4. Observe the oscilloscope or the monitor with a critical
eye while you adjust the front panel input level and
peaking controls to compensate for signal loss between the
transmitter and the MTP SW6.
5. If necessary, repeat steps 1 through 4 for each input.
6. If level/peaking and skew adjustments are available on
the connected receiver(s), set them in accordance with the
applicable MTP receiver product manual.
7. Disconnect the oscilloscope or monitor connected in step 1.
Skew delay compensation
CAT 5/5e/6 TP cable can lead to registration errors between the
red, green, and blue video signals. Pair skew can be measured
with test equipment or identied by viewing a crosshatch test
pattern with a critical eye to determine if either the red, green,
or blue video image leads (appears to the left of) the other two
video images.
N Skew correction should not be necessary when Extron
Enhanced Skew-Free A/V UTP cable is used and the
transmission distance is less than 1,000' (300 m).
N Unless the TP cable is changed, the skew adjustment
should only need to be made once, during installation.
N For best results, repeat the skew compensation for each
input.
The switcher has built-in skew compensation capabilities for its
TP output. Adjust the equalization as follows:
1. Select an input
2. Zero the skew delay for red, green, and blue as follows:
a. Use a Tweeker or other small screwdriver to press and
hold the Delay Select button for 3 seconds. The Delay
Red, Green, and Blue LEDs all go out.
b. Release the Delay Select button.
3. Use UTP cable test equipment or examine the displayed
video image with a critical eye to determine which video
signal — red, green, or blue — is most shifted to the left.
H The Extron VTG 300 or VTG 400 are recommended
to provide a crosshatch test pattern, which is ideal for
determining skew. A black background with vertical
white lines can also be useful.