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VN4A - Lexor Video Filter Networks, Low-Pass Signal Handling

Basic Specification

A range of Passive High Frequency Filters for applications in Television, Radio-Frequency and Instrumentation Circuits to minimise interference from out of band unwanted signals, by band-limiting, frequency separation and noise and interference suppression. Based upon Seventh order Cauer Filter design incorporating high stability inductors to achieve optimum performance, they provide sharp cut off characteristics and low ripple in the pass-band while providing good return-loss performance to match with external equipment. Controlled high attenuation in the stopband ensures a high degree of discrimination and the incorporation of delay equalising networks provides excellent Group-Delay performance.

Video Low-pass filters are presented in Dual-in-line packages or may be "boxed" with B.N.C. connectors.

 

Ripple in Pass-band ±0.15dB Max
Pass-band insertion loss 0.3 - 1.5dB Across Range
Stop-band edge >45dB
Pulse "K" Rating <1%
Group delay in Pass-band e.g. <4% of Delay Value (see table below)
Group delay bandwith >75% of Passband
Nominal Frequency range: 0.5MHz to 10MHz
Impedances 75 ohm (preferred) and 50 ohms
Operating Temperature Range -20°C to + 100°C

Nominal Frequency MHz Low Pass Band Edge Stop Band High Edge 45db@MHz Delay Z-50 Z-75
0.50 0.51 0.63 5520 02 35
1.00 1.01 1.25 2760 03 36
1.20 1.22 1.50 2300 04 37
1.25 1.27 1.57 2208 05 38
1.50 1.53 1.89 1833 06 39
2.00 2.03 2.50 1380 07 40
2.50 2.53 3.13 1104 08 41
2.75 2.81 3.46 1000 09 42
3.00 3.04 3.75 920 10 43
3.12 3.18 3.93 880 11 44
3.50 3.55 4.38 789 12 45
3.70 3.81 4.70 736 13 46
4.00 4.05 5.01 686 14 47
4.25 4.30 5.31 648 15 48
4.31 4.40 5.43 638 16 49
4.50 4.56 5.63 610 17 50
4.80 4.98 5.08 570 18 51
5.00 5.10 6.29 550 19 52
5.50 5.61 8.92 500 20 53
5.59 5.70 7.03 492 21 54
5.80 5.92 7.30 474 22 85
6.00 6.12 7.55 458 23 56
6.50 6.63 8.18 423 24 87
7.00 7.14 8.81 393 25 58
7.50 7.65 9.44 367 26 89
8.00 8.16 10.00 343 27 60
8.50 8.69 10.62 323 28 61
9.00 9.18 11.25 304 29 62
9.50 9.69 11.87 289 30 63
10.00 10.20 12.58 278 31 64


 
 
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