HDTV Low Pass Filters
Designed for use in digitization of high definition television signals.
hdtv_pr
  • Passband amplitude ripple less than ± .05dB
  • Delay distortion less than ± 1.5 nanoseconds
  • Group delay matching included
  • Stopband ratio: 1.475 @ 40 dB
  • Pre and Post low pass filters available
  • Sampling frequency
    • Y channel: 74.25 MHz
    • Cb & Cr channel: 37.125 MHz
  • Several types of packages available
  • 75 Ohm impedance
  • Pre-Filter insertion loss: 1 dB maximum
  • Post-Filter insertion loss: 3.5 dB maximum
These miniature lowpass filters are ideal for suppressing aliasing components in analog and digital HDTV systems. All new HDTV products that require control of delay and amplitude to SMPTE 260M and 274M specifications can be improved by using these filters. The HDTV series filters are amplitude and group delay equalized to reduce ringing in high performance video applications.
Technical Data
 

Part Number

Cutoff Frequency (MHz)

Stopband Ratio @ 40dB

- 50 dB  
@ Frequency
(MHz)

Sample Rate
(MHz)

- 12 dB
@ Frequency
(MHz)

 Amplitude
 Ripple (dB)		 Delay Distortion to 20 MHz to 30 MHz Typical Group Delay (nano- seconds)
HDTV-30P0-H 30.0 1.475 54.25 - 37.125 ± .05 ± 1 nsec ± 1.5 nsec 95
HDTV-30P0-HS 30.0 1.475 54.25 74.25 37.125 ± .05 ± 1 nsec ± 1.5 nsec 95
 

Part Number

Cutoff Frequency (MHz)

Stopband Ratio @ 40dB

- 50 dB  
@ Frequency
(MHz)

Sample Rate
(MHz)

- 6 dB
@ Frequency
(MHz)

 Amplitude
 Ripple (dB)		 Delay Distortion to 10 MHz to 15 MHz Typical Group Delay (nano- seconds)
HDTV-15P0-H 15.0 1.475 27.125 - 18.56 ± .05 ± 1 nsec ± 1.5 nsec 180
HDTV-15P0-HS 15.0 1.475 27.125 37.125 18.56 ± .05 ± 1 nsec ± 1.5 nsec 180
For post-filters add "S" to part number. Use V, H or M to designate the package style. (click to see dimensions)

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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