Extron electronic Car Amplifier IN3252HR User Manual

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.  
 
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
 
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.  
3
4
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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
 
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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H/S  
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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
 
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
 
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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