Extron Electronics IN3252HR Setup Guide

Setup Guide — IN3252HR

This guide provides basic instructions for an
experienced installer to set up and operate the
Extron® IN3252HR Distribution Amplifier (DA).

C

Installation and service must be performed

by authorized personnel only.

Step 1 — Turn off the DA and input/output devices

Turn the input and output devices off and unplug their power cords. Verify that the DA is
disconnected from the power source before proceeding.

Step 2 — Configure the jumpers

W

To ensure the best picture quality, inputs are
DC coupled as a factory default. If the source
device has a high DC offset that causes picture
distortion and/or instability, change the jumpers
to AC coupling. If a local monitor will be used,
change the jumpers so inputs are unterminated
(see figure 2).

If necessary, access the jumpers by following the
steps below.

a. Remove the screws from the sides of the unit and slide the top cover off.

b. Identify the location of the jumpers (see figure 1) and configure them as needed

(see figure 2).

c. Replace the top cover and tighten the screws.

Input is terminated to 75 ohms (loop-through not used)*

Input is unterminated (high Z) (loop-through connected
to a local monitor or another amplifier)

AC coupling

DC coupling*

*Factory default settings

Figure 2 – Jumper configuration table

Changes to internal jumpers must

be performed by authorized service
personnel only. Take steps to prevent
electrostatic discharge.

Configuration

Figure 1 – Board view of jumpers

J2 J3 J5 J1 J4 J6

Closed* Closed*

Open

Open

Closed*

Open

Closed*Closed* Closed*

Open

OpenOpenOpen

Closed

Step 3 — Attach input or loop-through cables

Connect an RGBHV, RGBS, RGsB, RsGsBs, component video, S-video, high resolution
monochrome video, or composite video device to these BNC connectors (c). See figure 3
on the reverse side for information on how to cable the BNC connectors.

N When using a loop-through connected to a local monitor, be sure to keep the cable

shorter than 12 feet in order to prevent reflections.

Step 4 — Attach output cables

Connect up to two RGBHV, RGBS, RGsB, RsGsBs, component video, S-video, high
resolution monochrome video, or composite video output devices, such as projectors
or monitors, to these BNC connectors (b). See figure 3 on the reverse side for more
information on how to cable the BNC connectors.

Setup Guide — IN3252HR (cont’d)

Power

RGsB,

Step 5 — Power on DA, input/output
devices, and check for picture

Plug the external power supply cord into the DA
(a) and turn on the input and output devices.
The picture should appear. If not, ensure that
all devices are plugged in and receiving power.
Check cabling and make adjustments as needed.

N The BNCs for the output(s) and input

C

Step 6 — Adjust video gain and peaking

With an oscilloscope:

a. Feed a grayscale signal from an Extron VTG 300/400 to the input of the IN3252HR.

b. Remove the green output cable attached to the display device and connect it to the

c. Adjust the green gain control (d) to achieve 0.7 Vp-p for the white bar of the test pattern.

d. Repeat steps b and c for the red and blue channels.

e. Adjust the peaking by connecting the green output cable from the display device to

f. Plug the red, green, and blue cables back into the display device.

Without an oscilloscope:

a. Feed a grayscale signal from an Extron VTG 300/400 to the input of the IN3252HR.

b. Adjust the green gain control (d) until the picture from the display device appears to

c. Adjust the red and blue controls (d) until the grayscale picture appears to be gray only.

d. Adjust the peaking control (e) until the picture appears sharp with no visible smearing.

must be connected with an identical signal.

Always use a power supply supplied or

specified by Extron. Use of an
unauthorized power supply voids all
regulatory compliance certification and
may cause damage to the supply and the
end product. Unless otherwise stated,
the AC/DC adapters are not suitable
for use in air handling spaces or in wall
cavities. The installation must always
be in accordance with the applicable
provisions of National Electrical Code
ANSI/NFPA 70, article 75 and the
Canadian Electrical Code part 1,
section 16. The power supply shall
not be permanently fixed to building
structure or similar structure.

oscilloscope with 75 ohm termination.

the oscilloscope and adjusting the peaking control (e) until no overshooting or round
corners appear on the test pattern.

have the correct brightness and contrast.

No color should be present.

Peaking

Gain
controls

RGBS

5

control

4

RsGsBs,
Component

Bottom view

S-video

Input

Composite
video

connector

Outputs

2

RGBHV

R

G

B

H

V

1

Figure 3 – Connectors/controls and

BNC connection diagram

3

Step 7 — Mount the DA

If necessary, mount the DA. For mounting information, see the IN3252HR User’s Guide or
refer to the bottom of the DA.

Extron USA - West

Headqua rters

+800.6 33.9876

Inside USA / Canada Only

+1.714.491.1500
+1.714.491.1517 FAX

Extron USA - East

+800.6 33.9876

Inside USA / Canada Only

+1.919.863.1794
+1.919.863.1797 FA X

Extron Euro pe

+800.3 987.6673

Inside Europe Only

+31.33.4 53.4040
+31.33.4 53.4050 F AX

© 2010 Extron Electronics. All rights reserved.

Extron Asia

+800.7 339.8766

Inside Asia Only

+65.63 83.440 0
+65.63 83.466 4 FAX

Extron Japa n

+81.3.35 11.7655
+81.3.35 11.7656 FAX

Extron Chi na

+400. 883.1568

Inside China Only

+86.21. 3760.1568
+86.21. 3760.1566 FA X

Extron Mid dle East

+971.4.2 991800
+971.4.2 991880 FA X

68-824-50

Rev. B

03 10