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Lowpass Filters - CATV / MATV

Model LP7, LP7E: General Purpose Lowpass

Models LP7and LP7E- enhanced selectivity, lowpass filters, pass the lower segment of the TV/RF spectrum from 0 MHz to a specified cut-off (Fc), and reject the upper segment stopband up to 1000 MHz(Fs) by >40dB.

Optional stopband - greater attenuation (>50 dB) and 3000 mHz bandwidth for some models.

 

Examples of Off-Air-TV Lowpass filters:

LP7E 698/716; LP7 700/740; LP7E 698/740-3G

These are Low pass filters designed to pass the Off-the-Air TV band and attenuate signals from 716 MHz, or 740 MHz, and above, e.g., LP7E 698/740-3G pass 0 to 698 MHz (UHF TV band) and attenuates (>50dB) signals from 740 MHz to 3000 MHz.


Sample graph LP7E 698/716
Sample graph LP7 698/740
Sample graph LP7E 698/740-3G



LP7-698/740,
LP7E-698/740-3G

Dim 4.0 "L x 1.75"H x 2.0"W


LP7E-698/716

Dim 7.0 "L x 1.75"H x 2.0"W

Table A below lists standard LP7 models, transition frequencies, and general specifications.

Economical filter offers user specified cutoff (Fc)

  • Fc is available from 4.2 MHz to 800 MHz
  • Passband loss: <1dB (except < 3dB at Fc)
  • Passband ripple: ±. 5dB; Return loss: 15dB typical
  • In general, LP7 passband to stopband frequency transition: 5% (i.e., Fs = Fc x 1.05); LP7E pass/stop transition is approx. 3.5 to 4%
  • Stopband: > 30 or >40 dB
  • Operating Bandwidth 870 / 1000 MHz
  • Available Indoor or outdoor enclosure
  • Customizing available: more Info here
  • For deletion filter applications, see our Lowpass Channel Eliminators.



LP7E Lowpass

Dim 7.0 "L x 1.75"H x 2.0"W
LP7 Lowpass
Dim 3.6"L x 1.5"H x 3.2"W

Example Graphs and Order Info

LP7-4.2/6 video lowpass

LP7E-40/50 return path lowpass

LP7-460/480 hyperband channel lowpass

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Table A: Example Lowpass Filters for CATV / MATV

Model #LP7 (Fc/Fs) Passband (MHz) Stopband (MHz) Transition (MHz) General Specifications
LP7-4.2/6 0 to 4.2 6 to 750 1.8 Passband: 1dB
LP7-38/42 0 to 38 42 to 750 4 Flatness: 0.5 dB
LP7-42/50 0 to 42 50 to 1000 8 Stopband Attn: 40 dB
LP7-48/54 0 to 48 54 to 1000 6 Return Loss: 14 dB typ.
LP7-72/76 0 to 72 76 to 870 4 Pass/Stop Transition: 5%
LP7-88/94 0 to 88 94 to 870 6 Impedance: 75 ohms
LP7-108/115 0 to 108 115 to 870 7 Dimensions(in):
  • 4L x 1.75H x 2W (indoor)
  • 4.5L x 3.25 H x 2.5W (outdr)
LP7-150/158 0 to 150 158 to 870 8
LP7-174/186 0 to 174 186 to 870 8
LP7-216/226 0 to 216 226 to 870 10 Weight(oz): 6 (indoor), 8(outdoor)
LP7 300/315 0 to 300 315 to 1000 15
LP7 348/366 0 to 348 366 to 1000 18 Connectors:
F-type Female *
*optional F male or BNC female
LP7 460/480 0 to 460 480 to 1000 20
LP7500/525 0 to 500 525 to 1000 25
LP7 550/576 0 to 550 576 to 1000 26 Power pass: 1A max, DC block optional
LP7 600/628 0 to 600 628 to 1000 28
LP7 700/740 0 to 700 740 to 1000 40  
LP7 750/780 0 to 750 780 to 1000 30