Delay Equalized Lowpass
Digital Filters for Video Processing 

  • Designed for Analog and Digital Video Filtering
  • Band Limiting of Video SignalsVery Low Distortion Due to the Tight Control of Delay in the Passband
  • Fast Transition from Passband to Stopband along with Good Stopband Rejection to over 100 MHz
  • Also Used as Anti-Aliasing Pre Filters befor Analog to Digital Converters
  • When used as Post-Aliasing Filters in Digital Processing Applications, the Passband can be shaped to correct for sin x/x (See VSL series)

 
Performance Graphs (please click)
Maximum Delay Variation = 3% 
Maximum Passband Ripple = ±.125 dB. 10 KHz to Passband end
Maximum Insertion Loss < 2.5 dB at 10 KHz
Impedance = 75 Ohms
VFL Size: 5" x 2" x 1-1/4" in metal cans with BNC Connectors
Delivery from Stock

 

 Series VCL Dimensions
VCL Series

Part Number

Max. 3% Delay Distortion
to 
Frequency
(MHz)

Max. 0.25dB
Attenuation 
@ Frequency
(MHz)

Min. 45dB
Attenuation 
@ Frequency
(MHz)

Approximate Passband Delay (Nanoseconds)
VCL3P2 3.2 3.2 3.90 1100
VCL3P5 3.5 3.5 4.27 1010
VCL3P8 3.8 3.8 4.63 930
VCL4P2 4.2 4.2 5.12 840
VCL4P5 4.5 4.5 5.49 780
VCL4P9 4.9 4.9 5.98 720
VCL5P2 5.2 5.2 6.34 680
VCL5P7 5.7 5.7 6.95 620
Allen Avionics, Inc.
255 East Second Street, Mineola, NY  11501
Phone: (516) 248-8080
Fax: (516) 747-6724
E-Mail: Info@AllenAvionics.com

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