User’s Guide
IN3252HR
RGBHV Distibution Amplifier/Line Driver
Extron Electronics, USA
1230 South Lewis Street
Anaheim, CA 92805
USA
714.491.1500
Fax 714.491.1517
Extron Electronics, Europe
Beeldschermweg 6C
3821 AH Amersfoort
The Netherlands
+31.33.453.4040
Fax +31.33.453.4050
Extron Electronics, Asia
135 Joo Seng Road, #04-01
PM Industrial Building
Singapore 368363
+65.6383.4400
Fax +65.6383.4664
Extron Electronics, Japan
Kyodo Building
16 Ichibancho
Chiyoda-ku, Tokyo 102-0082 Japan
+81.3.3511.7655
Fax +81.3.3511.7656
68-824-01
Rev. B
04 05
© 2005 Extron Electronics. All rights reserved.
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The IN3252HR is an ultrahigh resolution RGBHV video
distribution amplifier (DA) with gain and peaking controls. It
accepts RGBHV, RGBS, RGsB, RsGsBs, component video,
S-video, as well as high resolution monochrome video and
composite video baseband signals, and distributes the signals to
two separately buffered outputs and one passive loop-through.
The DA is powered by an external power supply, which is
included with the unit.
Monitor
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Projector
PC
Figure 1 — Typical connection setup
Features
400 MHz (-3 dB) video bandwidth — Provides outstanding
video performance.
Wide compatibility — Compatible with RGBHV, RGBS, RGsB,
RsGsBs, component, S-video, as well as high resolution
monochrome video and composite video baseband
signals.
2 outputs — Distributes a video signal from a single input to
two outputs.
Local monitor loop-through — Provides a passive loop-
through signal for a local monitor or for cascading to
create a larger DA system.
Gain controls — Individual red, green, and blue gain controls
amplify the signals to compensate for long cable runs.
Peaking controls — Enhances the image by increasing fine
details and clarity.
IN3252HR • Introduction
1
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IN3252HR
3.
Drill 3/32” (2 mm) diameter pilot holes, 1/4” (6.3 mm)
deep in the mounting surface at the marked screw
locations.
Installation
The IN3252HR can be placed on a desktop or shelf, or mounted
in a convenient location using optional mounting brackets
(IN9128).
4.
5.
Align the mounting holes in the brackets with the pilot
holes in the furniture.
1.
Turn all equipment off and ensure that the source device,
the DA, and the output devices have been disconnected
from the power source.
Firmly secure the IN3252HR to the furniture using #8
wood screws.
2.
Place or install the unit in the desired location.
Connections and Controls
3.
Connect the video signal source (input) device to the input
connector.
5
4.
5.
Connect the output devices to the output connectors.
1
Apply power to output device, the DA, and the input
devices.
3
2
6.
7.
Turn on the input and output devices.
Adjust the gain and peaking as needed.
2
3
Furniture mounting
IN3252HR
RGBHV DISTRIBUTION AMPLIFIER
Furniture mount the unit using the mounting bracket, as
follows:
Top view
Bottom view
1.
Attach the mounting brackets to the distribution amplifier
with the provided machine screws (figure 2).
4
2.
Hold the unit with the attached brackets against the
underside of the table or other furniture. Mark the
location of the screw holes of the bracket on the mounting
surface.
Figure 3 — IN3252HR connectors and controls
Power connector — Plug the external power supply cord into
this connector.
1
2
Video output connectors — Connect up to two RGBHV, RGBS,
RGsB, RsGsBs, component video, S-video, high resolution
monochrome video, or composite video output devices, such as
data projectors or data monitors, to these female BNC
connectors. See figure 4, BNC connectors for a connection
diagram.
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IN3252HR
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Inputs/Loop-thru connectors — Connect an RGBHV, RGBS,
RGsB, RsGsBs, component video, S-video, high resolution
monochrome video, or composite video device to these female
BNC connectors. See figure 4, BNC connectors for a connection
diagram.
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Gain controls — Rotate to adjust the amount of amplification
added to the individual red, green and blue video signals to
compensate for long cable runs. The adjustment range is 0.7
(30% decrease) to 1.4 (40% increase).
Figure 2 — Desk mounting the IN3252HR
IN3252HR • Installation
2
IN3252HR • Connections and Controls
3
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Peaking control — Rotate to adjust the amount of high
frequency boost added to the video signals to compensate for
long cable runs.
5
Input coupling jumpers (J1, J4, and J6)
To insure the best picture quality, inputs are DC coupled as a
factory default.
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If the source device has a high DC offset that causes picture
distortion and/or instability, change the jumpers to AC
coupling.
RGBHV
RGBS
RGsB,
RsGsBs,
Component
S-Video
Composite
Figure 4— BNC connectors
Internal Jumper Settings
Input termination jumpers (J2, J3, and J5)
Figure 6 — Board view of jumpers
In normal operation (factory default) the inputs are terminated
internally. To provide a passive loop-through signal for a local
monitor or extended DA system with 75 ohm input impedance,
jumpers J2, J3, and J5 must be changed from closed to open (see
figure 5 below).
Potentiometer Adjustments
With an oscilloscope
1.
Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the IN3252HR DA.
Configuration
J2
J3
J5
J1
J4
J6
Input is terminated to 75 ohms (loop-through not used)*
Closed* Closed* Closed*
2.
Remove the far end of the green output cable from the
display and connect it to the oscilloscope with 75 ohm
termination.
Input is unterminated (High Z) (loop-through connected to a
local monitor or another amplifier)
Open Open Open
AC coupling
Open
Open Open
3.
Adjust the green gain control to achieve 0.7 Vp-p for the
white bar of the test pattern.
DC coupling
Closed* Closed* Closed*
*Factory default settings
4.
5.
Repeat steps 2 and 3 for the red and blue channels.
Figure 5 — Jumper table
Adjust the peaking control by connecting the oscilloscope
back to the far end of the green output cable and adjusting
the peaking potentiometer until no overshooting or round
corners appear on the test pattern.
6.
Plug the far end cables back to the display device.
IN3252HR • Internal Jumper Settings
4
IN3252HR • Potentiometer Adjustments
5
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IN3252HR
Without an oscilloscope
Specifications
1.
Feed a grayscale signal from an Extron VTG 300/400 or
other A/V test generator to the input of the IN3252HR DA.
Video
Gain ............................................... -3 dB to +3 dB (0.7 to 1.4), adjustable
Peaking .......................................... 0 to +6 dB @ 100 MHz
Bandwidth .................................... 400 MHz (-3 dB)
2.
Adjust the green gain control potentiometer until the
picture from the display device appears to have the correct
brightness and contrast.
3.
4.
Adjust the red and blue potentiometers until the grayscale
picture appears to be gray only; no color is present.
Video input and loop-through
Number/signal type ................... 1 RGBHV, RGBS, RGsB, RsGsBs,
component video, S-video, composite
video input
Adjust the peaking control potentiometer until the picture
appears sharp and without visible smearing.
1 RGBHV, RGBS, RGsB, RsGsBs,
component video, S-video, composite
video passive loop-through
Connectors .................................... 2 x 5 female BNC
Nominal level ............................... 0.7 Vp-p for RGB
Minimum/maximum levels ...... Analog: 0.3 V to 1.5 Vp-p with no offset at
unity gain
Impedance .................................... 75 ohms (default) or Hi-Z (selectable)
Return loss .................................... <-40 dB @ 5 MHz
Input coupling.............................. AC/DC, jumper selectable
Video output
Number/signal type ................... 2 RGBHV, RGBS, RGsB, RGBcvS,
component video, S-video, composite
video (follows input type)
Connectors .................................... 2 x 5 BNC female
Nominal level ............................... 1 Vp-p for Y of component video and S-
video, and for composite video
0.7 Vp-p for RGB
0.3 Vp-p for R-Y and B-Y of component
video, and for C of S-video
Minimum/maximum levels ...... 0.3 Vp-p to 1.5 Vp-p (follows input)
Impedance .................................... 75 ohms
Return loss .................................... <-40 dB @ 5 MHz
DC offset ....................................... 100 mV with input at 0 offset
Sync
Input type ..................................... RGBHV, RGBS, RGsB, RsGsBs
Output type .................................. RGBHV, RGBS, RGsB, RsGsBs
Input level ..................................... 2.0 V to 5.0 Vp-p
Output level.................................. TTL: 5.0 Vp-p, unterminated
IN3252HR • Potentiometer Adjustments
6
IN3252HR • Specifications
7
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Specifications, Part Numbers, Accessories, cont’d
Input impedance .......................... 510 ohms
Output impedance ...................... 50 ohms
Max. propagation delay.............. 40 ns
Max. rise/fall time ....................... 9 ns
Polarity .......................................... Positive or negative (follows input)
General
External power supply ............... 100 VAC to 240 VAC, 50/60 Hz, external,
autoswitchable; to 9 VDC, 1 A, regulated
Power input requirements ......... 9 VDC, 0.2 A
Temperature/humidity .............. Storage: -40 to +158 °F (-40 to +70 °C) /
10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) /
10% to 90%, noncondensing
Rack mount................................... No, but furniture mountable with optional
brackets
Enclosure type.............................. Metal
Enclosure dimensions ................. 1.6" H x 5.25" W x 4.4" D
4.1 cm H x 13.3 cm W x 11.2 cm D
(Excluding connectors.)
Product weight............................. 1.0 lbs (0.5 kg)
Shipping weight........................... 3 lbs (2 kg)
Vibration ....................................... ISTA 1A in carton (International Safe
Transit Association)
Listings .......................................... UL, CUL
Compliances ................................. CE, FCC Class A, VCCI, AS/NZS, ICES
MTBF ............................................. 30,000 hours
Warranty ....................................... 3 years parts and labor
All nominal levels are at 10%.
Specifications are subject to change without notice.
IN3252HR • Specifications
8
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