ABW Miniature Brickwall Filter

ULTRA SHARP CUTOFF
MINIATURE LOWPASS VIDEO BRICKWALL FILTER

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The ABW Series Miniature Broadcast Quality Brickwall Filters were designed with original equipment manufacturers in mind. Their miniature size and superior performance will enhance any analog or digital television, RF or microwave product.

Applications

These ultra sharp cutoff filters are designed to improve analog and digital television signal by reducing interference from higher frequency subcarriers. Some application are:

  • NTSC and PAL video systems

  • ENG microwave system

  • Microwave and studio equipment

  • Roofing filters

  • Lowpass filtering of audio from video signals

  • Removing out-of-band interference

  • Eliminating audio buzz caused by audio sub-carriers

Key Features and Benefits

Ultra sharp cutoff filter with greater than 42dB attenuation
Stopband ratio = 1.066 x Fc (end of passband ripple frequency)      
ABW-4P20 will pass 4.2 MHz and give greater than 42dB rejection at 4.48 MHz
Cutoff frequency available from 2 MHz to 8 MHz
Phase & Delay equalized over 92.8% of the passband
 75 Ohm impedance
 Good return loss. Greater than 20 dB
Available in open or closed-box construction
Description
Ultra sharp cutoff video lowpass filter available in open or closed box construction.
For boxed unit (closed construction) replace "P" with "B" in part number. Example: ABW-4P20-B
Performance
Passband Flatness from 100KHz
Less than .15 dB peak to peak
Insertion Loss at 100 KHz
5 dB max.
Impedance
75 Ohms
Return Loss
Greater than 20 dB

Group Delay Ripple
10 nanoseconds max.*
Stopband Attenuation
42 dB min. to over 100 MHz
Stopband Ratio @ 42 dB
1.066 x Fc **
Operating Temperature
+32 to +150F (0 to +65C)
* ABW-2P00 = 15 nanoseconds max. ** Fc = end of passband frequency
Part Number End of Passband Ripple (MHz) Start of Stopband
 (42 dB); Reference Frequency 100 KHz (MHz)

Group Delay Ripple

Nominal Propagation Delay (microseconds)
nsec to (MHz)
ABW-2P00-P 2.00 2.13 30 1.85 3.045
ABW-4P20-P 4.20 4.48 20 3.90 1.450
ABW-4P49-P 4.49 4.79 20 4.17 1.356
ABW-5P00-P 5.00 5.33 15 4.64 1.218
ABW-5P10-P 5.10 5.44 15 4.73 1.190
ABW-5P40-P 5.40 5.76 15 5.01 1.130
ABW-5P56-P 5.56 5.93 15 5.16 1.095
ABW-6P00-P 6.00 6.40 15 5.57 1.015
ABW-6P80-P 6.80 7.25 15 6.31 0.895
ABW-8P40-P 8.40 8.95 15 7.80 0.725


 

Performance Data
Typical Response Curves: ABW-4P20


Package 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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