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.................
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.
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.
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. 8 - Left and Right audio inputs, 1 through 4 from the audio output of your VCR, DSS or DVD devices.
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.
If you have a combination of standard composite video (RCA type jacks) and S-Video (mini-din jacks) on your equipment you can only feed one or the other but not both to any given input to the SVS-4D. In this case you have several options. Option A: For ease of use, the SVS-4D has a composite to S-Video converter. You can feed a combination of composite and S-Video to the SVS-4D and feed only a S-Video signal to your TV.
Typical Hook Up #1 Figure 5 below shows a hook-up showing only two input sources. Be sure you use either S-Video or composite video inputs, but not both on the same input. The one SVS-4D output goes to the TV so you can watch and listen on your TV. The second output (audio only) goes to the stereo receiver so you can listen to music or surround sound audio using your stereo receiver. Figure 5, Hook-up in typical system Note 1: Use of the S-video output requires TV to have S-video input.
Typical Hook Up #2 Figure 6 below shows a system with 3 sources. It also illustrates using the dual outputs to record on a VCR, watch the video on the TV and listen to the sound on a surround system. As shown below, you can record inputs 1, 2 or 3 (not 4 as you would be trying to record to itself) and record video and audio on the recording VCR from the selected source.
Operation When AC power is first applied, all outputs will be muted and all the lights will come on for 1 second and then go out. The Power / Stand-by light will be lit dim red. The Auto Input and Volume Stabilization modes will be active as default. When the unit detects an active video input (composite or S-Video), the Power / Standby light will turn on full and the active input will be selected.
Volume Stabilizer Active (only on analog audio – no effect on digital audio) If the Volume Stabilizer Active light is on, then the output of the audio switcher will be routed through the Volume Stabilizer circuitry. When the Volume Stabilizer Active light is off, the audio signal is bypassed and the Volume Stabilization setting will not have any affect on the audio signal. Volume Stabilization Adjustment Volume Stabilization lets you control the dynamic range of the audio signal to accommodate your needs.
How it works This section has more technical information for the person who wants to learn more about the SVS-4D. In the block diagram below you can see how the audio and video inputs are selected and fed to the output buffer amplifiers. (Only the left audio channel is shown) Notice how the Volume Stabilizer Active switch allows you to bypass the Volume Stabilizer circuitry.
Volume Stabilization The SVS-4D monitors the active audio source and depending upon the setting of the Volume Stabilization adjustment, constantly changes the volume level smoothly to compensate to input volume level changes. Let’.s say the unit is set to the 10:1 setting. When the input level increases by 10 db, that is it gets louder, in just a few milliseconds, the SVS-4D reduces the volume by 9 db so the output only changes by about 1 db.
Composite to S-Video Conversion The SVS-4D has special circuitry to convert the composite video inputs to the S-Video outputs. The SVS-4D sends the original composite and the generated s-video signal to both sets of outputs. However, if you feed the selected input with a s-video signal, the SVS-4D only sends the s-video signal to the output. Note: Because the S-Video signal is generated from the composite video signal, the quality of the converted S-Video signal will not be as good as a true S-Video signal.
Trouble Shooting Problem Power/Stand-by light does not come on No video output No audio output No input is selected Picture is black and white AIM does not detect device when turned on Unit goes to standby after 5 seconds Volume seems to vary too much between sources Video stays on when in standby mode IR remote does not work Solution Make sure power adapter is plugged into a working outlet.
Technical Specifications Design and specifications are subject to change without notice Audio Inputs, (4 stereo) Input impedance, 47 Kohms Typical input level, 300 mv Frequency response 20 to 20KHz, +/- 3db (bypass mode) Signal to Noise ratio, greater than 70 db THD less than 0.1% (bypass mode) Left to right separation, greater than 60 db Channel to channel separation, greater than 60 db Outputs, (2) Output Impedance, less than 150 ohms Digital Audio Inputs (4) Coaxial (2), 75ohm, 0.
Limited Warranty Limited Warranty Sima Products Corp. (“Company”) warrants that is the accompanying product proves to be defective to the original purchaser in material or workmanship within 90 days from the original retail purchase, the Company will, at the Company’s option, either repair or replace same without charge (but no cash refund will be made).
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Sima Products Corp. 140 Pennsylvania Ave., Bld. #5 Oakmont, PA 15139 USA 412-828-3700 800-345-7462 412-828-3775 FAX Visit us at www.simacorp.com E-mail us at custserv@simacorp.
