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 DVRx-2
2개의 Composite 입력을 받아 4개의 Composite으로 분배하는 장비
40 MHz bandwidth (-3 dB), Gain 조절 가능, EQ 조정 가능
입력 : Composite
출력 : Composite
전원 : 12V AC or FlexPwr™ (포함) 
DVRx
Converting analog composite video to digital video has become commonplace
in security, presentation, and broadcast systems. Regardless
of the application, an optimized analog video input is essential for efficient
and accurate A/D conversion. The DVRx* product line is specifically
designed to provide reliable, easy-to-use, and accurate analog video optimization. Quickly set
composite video to RS-170A (NTSC) specifications with the DVRx to ensure optimal A/D converter
performance. The results can be impressive: Smaller file sizes, less distortion, and improved resolution.
Essential for DVR Applications
Unlike an video tape recorder, which simply records the incoming signal to tape, a DVR must first
convert the analog signal to a digital format. When the analog video doesn’t meet the RS-170A specification
– either due to transmission line losses, noise, interference, or DC voltages riding on the signal
– the A/D conversion process may generate errors that significantly degrade DVR performance.
Problems can include erratic recording, false motion detection, and moderate to sever distortion to the
video picture. VAC’s DVRx can optimize the analog signal to significantly reduce and typically
eliminate many of the problems that cause poor DVR performance.
DVRx Features
• Differential (“humbucking”) 75Ohm input mitigates ground loop interference
• Adjustable gain and EQ compensates for cable losses or low signal levels from the
video source
• AC coupling on the input eliminates DC offsets
• DX Restore circuitry provides correct voltage references to ensure outputs meet
RS-170A spec
• 40 MHz bandwidth is more than sufficient for NTSC quality video
* Patent Pending
DVRx-2 & DVRx-4
The DVRx-2 is a 2-channel 1X2 composite
Video DA with two outputs for each input.
The DVRx-4 is a 4-channel 1X2 composite
Video DA with two outputs for each input.
Both the DVRx-2 and DVRx-4 are epoxy
encapsulated Video Bricks, and are available
with either 12V AC or FlexPwr™ internal
power supplies.
Each DA has:
- Differential 75 Ohm input (BNC)
- Two active 75 Ohm outputs (BNC)
- Adjustable EQ
- Adjustable Gain 0.75X to 1.5X
- AC coupled input
- DC Restore circuitry eliminates DC offset
- DC coupling on outputs
- 40 MHz bandwidth (-3 dB)
- 0.5-2.0 Vpp input signal range
- +/- 8V input offset voltage range
- Output current drive > 20 mA
Size: DVRx-2: 4.4" x 2.2" x 0.65"
DVRx-4: 4.4” x 2.2” x 1.4”
(Figure B, pg. 69)
Power*: DVRx-2: 12V AC or FlexPwr™
DVRx-4: 12V AC or FlexPwr™
Operating Temp: -40 to 50C (12V AC)
-40 to 80C (FlexPwr)
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