About Us

WHY YOU NEED VAC

30 + years of design & manufacturing experience
Extreme Condition Applications
Virtually Indestructible
Rugged & Durable
Designed & built in the USA                 

 

Warranty

Product Return Policy
There is a 25% restocking fee if the sealed anti-static bag is opened or if the product is returned after 30 days from purchase. VAC requires a return authorization number for all returned products.

Two Year Limited Warranty
All Video Accessory Corporation (VAC) products have a full two year limited warranty. Exclusion to the warranty include but are not limited to damage to external components, power LED failure where the product continues to functions, electrical damage due to lightning or ESD, and minor cosmetic imperfections in the epoxy that do not affect the unit’s performance. The warranty shall be void if any alteration or repair of the VAC product is attempted by anyone not authorized by VAC. This warranty is expressly in lieu of all other warranties expressed or implied, including warranties of merchantability and fitness for use, and of all other obligation or liabilities on the part of VAC, and it neither assumes nor authorizes any other person to assume for it any liability in connection with the sale of this product. This warranty shall not apply to the product or any part thereof subjected to accident, negligence, alteration, abuse or misuse. No warranty whatsoever is made with respect to accessories or parts supplied by anyone other than VAC, and this warranty shall extend only to the original purchaser of the product. The warranty provided in this article is exclusive and in lieu of, and buyer hereby waives, all other remedies, express or implied, arising by law or otherwise, including consequential damages, where or not occasioned by negligence of VAC. This warranty shall not be extended, altered or varied except by written instrument signed by VAC and buyer, and shall only apply within the boundaries of the continental United States. Liability of VAC is limited repair or replacement at the option of VAC. Warranty work is to be sent to VAC. Freight charges will be the responsibility of the purchaser.                                                                                                                                                            Rev. 01-01-2018

Video Signal Input Configurations

Standard 75 Ohm Video Input
Our most common video input, this input is used for short cable rue and local signal distribution. Input impedance is 75 Ohms to common ground.

Loop-Thru Input
This input allows the signal to be routed through the video distribution amplifier and out to another device. The loop-thru output must be terminated by a connected device or with a 75 Ohm terminator. The advantage of the loop-thru configuration is the signal will pass through the video distribution amplifier to the loop-thru output even if the video distribution amplifier has no power. These Bricks ship with a 75 Ohm terminator, and additional terminators are available for purchase.

Differential Input
Differential input is used when the user requires the input ground or shield to be isolated from the output ground or shield. This input is used to provide limited ground isolation (<5K Ohms) and helps break ground loops through the cable shield conductors. Unlike the standard and loop-thru inputs that look at the input signal with respect to ground, this input looks at the signal difference between the input signal and the input ground shield.

Differential Loop-thru Input
This input combines the benefits of the differential and loop-thru input described above. These Bricks ship with a 75 Ohm terminator. Additional 75 Ohm terminators are available for purchase.

Video Gain Configurations

Unity Gain
This unity gain configuration sets the signal level at the distribution amplifier outputs (into a 75 Ohm load) so they equal the input signal level. A unity gain distribution amplifier acts as an active “splitter” in which each output is an identical copy of the input signal. VAC video distribution amplifier designs utilize a separate driver for each output. This configuration provides the maximum isolation between outputs.

Global Variable Gain
This distribution amplifier configuration provides a single gain control for each group of two or four outputs (one control per Brick “layer”). The normal gain range is 75% to 175% of the input signal. A single output driver connects to the four outputs.

Individual Gain
This gain configuration reproduces the input and actively drives all of the outputs using individual drivers. The gain level of each output is individually controlled, with a range of 75% to 175% of the input signal. The individual gain configuration provides the user with the most flexibility to adjust and optimize output signal level

Audio Signal Input Configurations

Unbalanced Audio
Our most common audio input for non-professional applications, this type of audio is also often found on commercial grade audio equipment. Signals are transmitted by two conductor transmission lines. The input termination exceeds 10K Ohms. Unbalanced audio may be stereo of mono signals.

Loop-Thru Unbalanced Audio Input
This loop-thru option operates with the same signal type and characteristics as the standard unbalanced audio input, but with a low impedance pass through path at the input to facilitate daisy-chaining of multiple units. This input configuration is also useful when a passive output is required in the event of power failure.

Balanced Audio
This type of audio is usually found on professional grade audio equipment. Signals are transmitted by three conductor transmission lines. The input termination for each signal conductor to ground exceeds 10K Ohms. Balanced audio may be stereo of mono signals.

Loop-Thru Balanced Audio
The loop-thru option operates with the same signal type and characteristics as the standard balanced audio input, but with a low impedance pass through path at the input to facilitate daisy-chaining of multiple units. This input configuration is also useful when a passive output is required in the event of power failure.

Audio Gain Configurations

Unity Gain
This unity gain configuration reproduces the input signal and actively drives all of the output signals using a single driver. This configuration acts as an active “splitter”, and the unit operates using a 600 Ohm load.

Unity Gain with Individual Drivers
This unity gain configuration uses individual drivers for every output signal. The units operate using a 600 Ohm load for unbalanced audio, and a 300 Ohm load for balanced audio (per line).

Variable Global Gain
This gain configuration reproduces the input signal and actively drives all of the output signals using a single driver with adjustable gain. The unit gain range is specified by a 600 Ohm load for unbalanced audio, and a 300 Ohm load for balanced audio (per line).

Individual Gain
This gain configuration reproduces the input signal and actively drives all of the output signals using a separate drivers with adjustable gain for each channel. The unit gain range is specified by a 600 Ohm load for unbalanced audio, and a 300 Ohm load for balanced audio (per line).

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