5 Input A/V Switcher with Component Video, Digital Audio, Automatic Input Mode and Volume Stabilizer Model VS-502 User Manual Online Product Registration http://www.simacorp.
Caution: IMPORTANT SAFEGUARDS FOR AUDIO PRODUCTS. PLEASE READ CAREFULLY THE FOLLOWING IMPORTANT SAFEGUARDS THAT ARE APPLICABLE TO YOUR EQUIPMENT 1. Read instructions - All the safety and operating instructions should be read before the appliance is operated. 2. Retain instructions - The safety and operating instructions should be retained for future reference. 3. Heed Warnings - All warnings on the appliance and in the operating instructions should be adhered to. 4.
FRONT PANEL................................................................................... 5 REAR PANEL ..................................................................................... 6 IR REMOTE CONTROL................................................................... 7 TYPICAL HOOK UP ......................................................................... 8 OPERATION ..................................................................................... 11 POWER.................................
Introduction Congratulations on purchasing Sima’s Model VS502, 5 Input Audio / Video Switcher with Automatic Input Mode (Auto Input) and Volume Stabilization. It has been designed for use with Home Theater, DSS Satellite, DVD, HDTV, Video Games, Audio Recording Equipment, as well as for background music applications. The VS-502 has the following features: • High Bandwidth- low noise audio / video switching for today’s high quality systems.
Front Panel 1 2 3 5 4 6 7 Figure 1, VS-502 front panel Controls 1 - Power / Standby - Press to toggle the unit between modes. The red Standby indicator above the button will be lit when the unit is in Standby Mode. 5 - Volume Stabilizer Active - Press to turn Volume Stabilizer on or off. The amber indicator light will be lit next to the selected adjustment level. Indicator light is off when the Volume Stabilizer is bypassed. 2 - Auto Input Mode - Press to turn the Auto Input mode on or off.
Rear Panel 1 2 3 4 5 6 7 8 9 10 11 12 Figure 2, VS-502 rear panel 1 - Left and Right Audio Inputs, 1 through 5 from the audio output of your VCR, DSS or DVD devices. 9 - Coaxial Inputs for Digital Audio - Inputs 1, 3, & 5 have coaxial connectors to connect to the coaxial output of your DVD, CD player etc. 2 - Composite Video Inputs; 1, 2, 3, 4, & 5 from the composite video output of your VCR, DSS or DVD devices.
IR Remote Control The IR remote control allows you to control all of the functions available from the unit’s front panel, with the addition of a DIM setting. POWER – Toggles between Active and Standby mode. DIM - Pressing this button cycles through four levels of brightness on the front panel lights-100%, 75%, 50%, 10%. VOLUME STABILIZER ACTIVE - Toggles between the Volume Stabilizer being Active or in the Bypass mode. AUTO SCAN - Toggles between the Auto Input Selection mode being on or off.
Typical Hook up Step 1 Connect the AC adapter to 120 VAC and plug the DC cord into the 15 VDC input on the rear of the VS502. Step 2 You will need to determine how you want to use your system. We have provided two sample hook-up diagrams to help you determine how to connect the components of your system. You can use the last page of this manual as an organizer for your equipment. Read the following notes before installing the VS-502 into your system.
Fig. 5 - Basic Hook-up #1: Connecting Two Sources Below shows a hook-up with only two input sources. This shows only inputs 3 and 5 being used. The output A from the VS-502 goes to the TV. Note below how component input 3 is being used a composite video input. Video inputs 3 and 4 can both be used as composite or component video inputs. Figure 5, Hook-up in typical system This would be a typical configuration if you want to watch video and listen to audio on your TV.
Fig. 6 - Basic Hook-up #2: Connecting Different Video Types Below shows a hook-up with 3 input sources. Below shows inputs 1, 2 and 3 being used. Input 1 is being used as a composite video input with stereo left and right audio. Input 2 shows how to connect S-Video while using the optical digital audio input. Input 3 unlike (figure 5) is now being used as a component video input along with a coaxial digital audio connection.
Operation When AC power is first applied, all outputs will be muted and all the lights will come on for three seconds 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, SVideo, or component video), the Power / Standby light will turn off and the active input will be selected.
Volume Stabilization Adjustment Volume Stabilization lets you control the dynamic range of the audio signal to accommodate your needs. The Volume Stabilizer light must be on for this to function. The numbers show the ratio of the input signal to the output signal in dB. Thus, the setting in the middle (1:1) means that the input signal is the same as the output signal.
How it Works This section has more technical information for the person who wants to learn more about the VS502. 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.
in approximately 5 seconds, the unit will go back to the first input. If the first input goes off, the unit will turn itself off and return to the stand-by mode in about one-minute and wait for an input to become active. Note: The Automatic Input Sensing only senses the video signals and not the audio signals.
Video Conversion The VS-502 has special circuitry to convert the composite video inputs to the S-Video outputs and the composite/S-Video signals to component video.
RS-232C Interface The RS-232C interface on the VS-502 lets you connect the unit to a home automation system and control the various functions of the unit.
Message Acknowledgement Start Character $ Channel Status 0 0 = Message received OK 1 = Error 2 = Data string follows 0 = Message received OK 1 = Error 1-5 Fig.7 The VS-502 will ignore any message that does not begin with the @ character; “01” will be returned. When the VS-502 receives a correctly initiated RS232 message, it will respond with an acknowledgement message, followed by a block of data, as appropriate.
RS232 Status Response The returned data format (in response to a status request) takes the following format: Message header = $02 as per Figure 7 above (0 = RS232 address). Message data: $02VEXCSXSDXSSXSAXAV=XX SVXCVX No=XX Nv=XX Pt=XX Nt=XX Sv=XX E2X SWX TVX H,G=XX,X XX,X XX,X XX,X XX,X Note that the mnemonics are the same as for the received RS232 commands.
Advanced System Commands Advanced Digital Audio Mapping Some home theater setups may require that the digital audio be mapped from one input to another. For example: Video Input 4 has a Co-axial Digital Audio connection by default. To use a optical digital audio cable with Video Input 4, the digital audio will need to be mapped. To enter into Digital Audio Mapping mode: 1. Disconnect the VS-502 from AC Power 2.
Trouble Shooting Problem Power/Stand-by light does not come on No video output -Composite -S-Video -Component No audio output -Analog -Digital No input is selected Picture is black and white Auto Input does not detect device when turned on Unit goes to standby after one minute. Volume seems to vary too much between sources 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, (5 stereo) Input impedance, 47 KΩ Typical input level, 300 mV Frequency response 20 to 20KHz, +/- 3dB (bypass mode) Signal to Noise ratio, greater than 80 dB THD less than 0.03% (bypass mode) Left to right separation, greater than 60 dB Channel to channel separation, greater than 60 dB Outputs Output Impedance, less than 150 Ω Digital Audio Inputs Coaxial (3), 75 Ω, 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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System Organization Chart Fill in the chart below to help you organize and remember what devices are connected to the inputs and outputs. Save for future reference. Inputs From (VCR, DSS, etc.) Component Video Composite Video SVideo L&R (analog) audio Digital audio Coaxial/Optical To (TV, Receiver, etc.
