User manual SIMA SVS-4D

[. . . ] 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] 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. 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 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. 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. This lets you use just one S-Video input on your TV and all sources will automatically be displayed there. Option B: If your TV has 2 video inputs that supports both composite video and S-Video inputs, you can feed both the composite and S-Video outputs from the SVS-4D to your TV. You will have to select the correct video input on your TV, composite or S-Video. Note that this only works if the composite video and S-Video inputs are two separate inputs on your TV. Otherwise the picture may be blank, black and white or have lines and streaks. Fill in the chart below to help you organize and remember what devices are connected to the inputs and outputs. Composite Standard L&R Inputs From (VCR, DSS, etc. ) Digital (analog) audio audio #1 #2 #3 #4 Outputs To (TV, Receiver, etc. ) Composite Standard L&R audio (analog) Digital audio A B Remember both the A and B outputs are identical. The SVS-4D has buffers to prevent one output from loading the other output for best system performance. [. . . ] For an input change from -20 dbv to 0 dbv (a 20 db change) the output only changed 2 db (11dbv to -9 dbv). This results in soft conversations being boosted to a normal level and loud special effects being reduced to a normal level. With the SVS-4D set to 1:2 expansion, if the input makes the same -20 dbv to 0 dbv change as above, the output now goes from -30dbv to +10 dbv. This results in soft sounds, including tape hiss and soft conversations, becoming even softer and loud special effects becoming even louder. Volume Stabilizer Input / Output Curves Page 13 Composite to S-Video Conversion The SVS-4D has special circuitry to convert the composite video inputs to the S-Video outputs. [. . . ]