Sima SVS-4D User Manual

4 Input A/V Switcher

with Automatic Input Mode and Volume Stabilizer

Model SVS-4D

User Manual

Table of Contents

WHAT’S INCLUDED......................................................................... 2

INTRODUCTION ............................................................................... 3

IMPORTANT SAFETY PRECAUTIONS........................................ 3

FRONT PANEL................................................................................... 4

REAR PANEL ..................................................................................... 5

IR REMOTE CONTROL, SRC-1...................................................... 5

TYPICAL HOOK UP ......................................................................... 6

OPERATION..................................................................................... 10

OWER ............................................................................................. 10

P
I

NPUTS.............................................................................................. 10

A

UTO INPUT MODE .......................................................................... 10

V

OLUME STABILIZER ACTIVE........................................................... 11

V

OLUME STABILIZATION ADJUSTMENT ............................................ 11

HOW IT WORKS ............................................................................. 12

IMPLIFIED BLOCK DIAGRAM OF THE SVS-4D ................................. 12

S
A

UTOMATIC INPUT SENSING............................................................. 12

V

OLUME STABILIZATION .................................................................. 13

V

OLUME STABILIZER INPUT / OUTPUT CURVES................................ 13

C

OMPOSITE TO S-VIDEO CONVERSION ............................................. 14

TROUBLE SHOOTING................................................................... 15

TERMS............................................................................................... 15

TECHNICAL SPECIFICATIONS .................................................. 16

LIMITED WARRANTY................................................................... 17

What’s Included

1 - SVS-4D A/V switcher unit
1 - AC power adapter, 15 vdc.
1 - Triple A/V RCA cable, 1 meter long
1 - SRC-1 IR remote control, with batteries
1 - This instruction manual

2002 by Sima Products Corp.
All rights reserved. No part of this publication may be reproduced or transmitted in any form or
by any means without prior written permission from Sima Products Corp.

Page 2

Introduction

The Sima model SVS-4D, 4 Input Audio / Video
Switcher with Automatic Input Mode (AIM) and
Volume Stabilization has been designed for use
with home theater, DSS satellite, DVD, audio
recording equipment as well as for background
music applications.

The SVS-4D has the following features:

• Four A/V inputs to allow you to add more A/V
sources such as DVD, satellite dish, VCR,
games, etc. to your TV and home theater system.
The unit supports both stereo and digital audio,
as well as composite and S-Video.

• Digital Audio Conversion simplifies your hook­up by providing outputs for both coaxial and
optical audio signals regardless of the source.

• Automatic Input Mode (AIM) provides
automatic switching to active input without
manual selection. Simply turn on your VCR and
the SVS-4D connects it automatically to the TV.

• Volume Stabilization circuitry to maintain
constant audio volume levels for late night
viewing or when channel surfing. It can also be
adjusted to add impact to old movies by
increasing the dynamic range.

• Dual A/V outputs to connect to your TV, your
surround sound receiver and/or a recording
VCR.

• Composite video to S-Video conversion to
simplify hook-up in systems using both

• IR remote control to select a different input or
mode.

• Brightness control for the front panel display
allows you to dim the lights for nighttime use
(via the remote only).

composite and S-Video.

Warnings

Important Safety Precautions

When using this product, basic safety precautions should always be followed to reduce the risk of fire and electric shock,
including the following:

Read and understand all instructions.
Follow all warnings and instructions marked on this product.
Unplug this product from wall outlets before cleaning. Do not use liquid or aerosol cleaners. Use a damp cloth for

cleaning.

To prevent fire or shock hazard, do not expose this product to rain or moisture. Do not use near a bathtub, wash

bowl, sink, or laundry tub; do not use in a wet basement or in a swimming pool.
To avoid electrical shock, do not open the case of this product.
Operate this product using only the power supply included with it or provided as an accessory. If you are not sure of

the type of power supplied to your home, consult your dealer or local power company.
Do not overload electrical outlets or extension cords as this can result in fire or electric shock.
The unit should be situated away from heat sources such as radiators, stoves, etc. The unit should be situated so that

its location or position does not interfere with its proper ventilation.

Page 3

Front Panel

Figure 1, SVS-4D front panel

Controls

1 - Power / Stand-by - Press to turn unit on or

off. The Power/Stand by light above the
switch will be on when the unit is
operational and dim when it is in the standby
mode.

2 - Inputs 1 through 4 - Press to select the

desired input. The light above the switch will
light to indicate the current active input.

3 - Auto Input Mode - Press to turn AIM on or

off. If on, the unit will scan the video inputs
and automatically turn on and select the
input to the device you turned on.

4 - Volume Stabilization Adjustment - This

controls the amount of dynamic range you
want. In the middle, at the 1:1 setting, the
input is equal to the output, so there is no
affect on the audio signal. If the knob is
rotated counter-clockwise towards the 10:1

setting, the audio will remain more constant.
This will bring up soft dialogue and reduce
loud sounds. If the knob is rotated clockwise
towards the 1:2 setting, the unit will increase
the dynamic range and make loud sounds
louder and soft sounds quieter to add impact
to music or movies.

5 - Volume Stabilizer Active - Press to turn

Volume Stabilization on or off. If active, the
light will be on and the audio will go though
the Volume Stabilization circuitry to either
increase or decrease (depending on the
setting of the Volume Stabilization
adjustment) the dynamic range of the audio.
The light will be off when the Volume
Stabilization is bypassed.

Page 4

Rear Panel

Figure 2, SVS-4D rear panel

6 - S-Video inputs, 1 through 4 from the S-Video

output of your VCR, DSS or DVD devices.

7 - Composite Video inputs, 1 through 4 from

the composite video output of your VCR, DSS or
DVD devices.

11 - Left and Right audio outputs, A and B that

connects to the audio inputs on your TV, VCR or
surround sound receiver

12 – Coaxial inputs for digital audio connect to

the coaxial output of your DVD, CD player etc.

8 - Left and Right audio inputs, 1 through 4

from the audio output of your VCR, DSS or
DVD devices.

9 - S-Video outputs, A and B that connects to the

input on your TV or VCR

10 - Composite Video outputs, A and B that

connects to the input on your TV or VCR

IR Remote Control, SRC-1

Fig. 3, SRC-1

All the buttons on the SRC-1 IR remote control work just like the buttons on the

front of the SVS-4D, with the exception of the DISPLAY button. See
descriptions above (under the heading “Front Panel”) for more information

POWER - Turns SVS-4D on or off.
DISPLAY - Pressing this button cycles through three levels of brightness on the

front panel lights - bright, dim or off. When the Display is set in the “off” mode,
the lights will light for a few seconds when any button is pressed.

VS ACTIVE - Toggles between the Volume Stabilizer being active or in the bypass

mode.

AUTO INPUT - Toggles between the Automatic Input Selection mode being on or

off.

INPUT 1 through 4 - Selects desired input.

Be sure to install the two AAA batteries in the SRC-1 remote before using. Slide the
cover open on the SRC-1 remote in the direction of the arrow and install the
batteries as shown inside the unit.

13 – Optical inputs for digital audio connect to

the optical output of your DVD, CD player etc.

14 – Coaxial output for digital audio that

connects to the coaxial input of stereo receiver.

15 – Optical output for digital audio that

connects to the optical input of stereo receiver.

16 - 15V DC input from the AC wall power

supply

Page 5

Typical Hook up

This shows a overview of a typical system with the SVS-4D using 4 A/V sources, a TV and Surround
system. The outputs of up to 4 devices can feed into the inputs on the SVS-4D. It can then select one of
the devices to watch on your TV and/or listen on your receiver. Refer to the diagrams on the next few
pages for more detailed connection diagrams.

Figure 4, Overview of typical system

Step 1

Connect the AC adapter to 120 VAC and plug the DC cord into the 15 v input on the SVS-4D.

Power supply

Use the 15V DC adapter (included) to provide power for the SVS-4D.
The adapter connects to the unit as shown in the diagram at left and
plugs into a standard 120V AC wall outlet.

Step 2

You need to determine how you want to use your system.

If you want to watch and listen to the video sources on your TV and / or your surround sound receiver,
see figure 5 on page 8. This diagram only shows inputs 1 and 2 being used. Inputs 3 and 4 are
connected in the same manner.

If you want to be able to watch the video sources on your TV, listen on your surround sound receiver and
tape from the sources plugged into the SVS-4D, see figure 6 on page 9. This shows how to connect one
of the outputs of the SVS-4D to the Audio and Video inputs on the VCR that you will use for recording.

Note: Do not select the same input that the recording VCR is connected to (input 4 in this
diagram) while recording or loud feedback could occur.

If you only have composite video signals or only S-Video signals, then use the one type in your system.
If your TV only has composite video inputs, you must use all composite video signals into the SVS-4D as
it will not

convert S-Video signals to composite video.

Note: the SVS-4D does not convert analog audio to digital audio or visa versa.

Page 6