Inday SVDA-1 Manual

Inday Modtager SVDA-1

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Side 1/2

Overview And Uses

SVDA-1

S-Video

Distribution

Amplifier

Phone: 503-575-1951

Email: support@inday.com

INDAY

1818 NE 140th

Portland, Oregon 97230

For Customer Service:

The SVDA-1 is a 4 output S-Video distribution

amplifier designed for the Broadcast, Video Pro-

duction and Multimedia environments. Its most

common application will be to distribute the output

of a VCR or other S-Video source to Switchers,

Routers, Monitors and other VCR's while main-

taining picture quality.

Often times the output of a VCR or Computer

Based Editing system has only One S-Video con-

nector. This can be quite limiting if you need to

make multiple dubs of a finished project or you

need to monitor the quality of the signal BEFORE

it passes through another VCR or piece of process-

ing equipment. Figure 1 shows a typical applica-

tion that overcomes these problems.

S-Video is a much cleaner way to distribute Vide

gnals. Its component nature reduces the interfer-

ence and distortion that is often seen in NTSC

Video. The longer you can keep a Video signal in

its component format the cleaner the end product

will look. Although the SVDA-1 cannot make

"Poor" video look any better, it will not add an

noi

se or distortion to it.

Installation

The SVDA-1 comes shipped ready to use. The

proper Wall Transformer is supplied. Simply con-

nect your source to the SVDA-1 input and connect

outputs as needed. Under most circumstances no

gain adjustment should be required. The unit is

shipped with gain set for unity. A 1Vp-p input will

produce 4-1Vp-p outputs. However if your Input

level is low or the outputs are driving long (>200

ft.) cables, the Y and C gain may need to be ad-

justed. See the next section for alignment proce-

dures.

Y/C Delay Notes

Y/C Delay is the leading or lagging of the Chroma

signal in time, referenced to the Luminance signal.

The SVDA-1 has no provision to correct this error.

Delays less then 100ns usually do not cause prob-

lems. If there is a gross delay error, a Delay Line

must be inserted in either the Y or the C signal

path. The delay line can be just a piece of Coax

cable or a Delay Box with switches. The Delay

Box should be capable of at least 300ns. If Coax is

used remember that 1ns equals 0.648-ft. (7.778") of

cable. For example, a Chroma delay of 281ns can

be corrected by inserting 182 ft. of coax in the Y

signal path.

Figure 1

Figure 2

INDAY

Multimedia Accessories

INDAY

Multimedia Accessories

Alignment

If critical level adjustment becomes necessary

you will need a Y/C Test Generator, such as a

Tektronix TSG 120, a Dual channel Oscilloscope

and an S-Video to BNC adapter. If these are not

available, accurate level settings cannot be made.

In most cases the gain controls should be keep

around the 10 o'clock position. This assumes a

1V p-p input. If you have the necessary test

equipment proceed as follows:

1- Connect Y to Oscilloscope CH-1

2- Connect C to Oscilloscope CH-2

3- Terminate both channels with 75 ohms

4- Adjust Y for 1Vp-p using Color Bars or

Pulse & Bar

5- Put Oscilloscope in Dual Add mode

6- Adjust C level to match the Color Bars

White Flag -or- Adjust C level using a

Pulse & Bar signal by flattening out the

bottom of the 12.5T pulse.

See Figure 3.

Figure 3

Specifications

INPUT:

4-pin mini Din (SVHS)

Y-channel 1Vp-p terminated

C-channel .8Vp-p terminated

OUTPUT:

Four 4-pin mini Din

Y-channel 1Vp-p *

C-channel .8Vp-p *

Impedance 75 ohms

Noise > 60dB below 1Vp-p

Frequency Response DC - 10Mhz +/-.3dB

Y/C delay < 2ns

GAIN:*

-4.5dB to +3dB both Y & C

.6V p-p to 1.4V p-p Y-channel

.45V p-p to 1.05Vp-p C-channel

POWER:

12VDC (18VDC Max) @ 200ma Max.

Wall Transformer supplied

DIMENSION:

4"W x 5"L x 7/8"H

TEMPERATURE

0 TO 50 DEGREES C

HUMIDITY

0 TO 90% (non-condensing)

R12

4.7K

R11

4.7K

470uf

4.7K

3.3K

10uf

C26

10uf

C25

100uf

C24

10uf

C30

C28

.1uf

C27

.1uf

C31

.1uf

CN5:B

CN4:B

CN3:B

CN2:B

.01uf

C22

.01uf

C20

.01uf

C18

.01uf

C11

R15

330

RV2

R22

150

C13

.01uf

R19

CN1:B

R24

R21

R14

R18

U4:B

MC14576A

U4:A

U5:A

MC14576A

U5:B

R26

R25

R27

R28

CN5:A

CN4:A

1000uf

C16

R23

R20

R13

R17

U3:B

MC14576A

U3:A

1000uf

U1:A

MC14576A

U1:B

R10

1000uf

CN2:A

CN3:A

470uf

C15

RV1

330

CN1:A

1000uf

100uf

C29

U2:B

MC14576A

U2:A

3.3K

R16

AN7809

2.0

R29

CN6:1

CN6:2

1N4001

C14

.01uf

C10

.01uf

C17

.01uf

C19

.01uf

C21

.01uf

AN7810

S-VIDEO DA Rev.A

MIKE CURTIN

12VDC

S-DA-2A.S01

1-24-94

VIDEO BUFFER MC14576A

INDAY-VIDEO BUFFER UNIPOLAR

INPUT LUMINANCE BUFFER

INPUT CHROMINANCE BUFFER

CHROMINANCE GAIN

LUMINANCE GAIN

LUMINANCE OUTPUT DRIVERS

CHROMINANCE OUTPUT DRIVERS

AB C D E F

FEDCBA

INDAY

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Date:

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Disclaimer

This manual has been checked for accuracy. Inday

assumes no liability for damages incurred directly or

indirectly from errors or omissions or from the use

and suitability of this product for a particular applica-

tion.

Produkt Specifikationer

Mærke:	Inday
Kategori:	Modtager
Model:	SVDA-1

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