Lowpass Filter
Sample Graphs, LP7 Customizing, Order Info
Graph: LP7-4.2/6
Lowpass filter designed to pass only the video band
LP7 4.2/6 Video Lowpass
| Transmission | Return Loss | ||
| Mkr | Freq (MHz) | Attn (dB) | Attn (dB) |
| 1 | 4.200 | -1.549 | -25.931 |
| 2 | 6.000 | -83.78 | -0.492 |
| 3 | 1.000 | -0.56 | -17.380 |
Graph: LP7-40/50
Lowpass filter designed to pass only the return path and highly attenuate the forward path.
LP7E-42/50 Passband
| Transmission | Return Loss | ||
| Mkr | Freq (MHz) | Attn (dB) | Attn (dB) |
| 1 | 42.000 | -1.349 | -23.961 |
| 2 | 50.000 | -70.721 | -0.298 |
| 3 | 5.000 | -0.097 | -25.080 |
| 4 | 30.000 | -0.417 | -24.007 |
LP7E-42/50 Lowpass Group Delay
| Transmission | Return Loss | ||
| Mkr | Freq (MHz) | Delay (ns) | Attn (dB) |
| 1 | 42.000 | 128.27 | - |
| 2 | 50.000 | -140.26 | -68.061 |
| 3 | 5.000 | 31.758 | -0.426 |
| 4 | 30.000 | 46.446 | -0.730 |
Custom modify and enhance your LP7
Example Lowpass: LP7-460/480 - illustrates customized LP7 specifications: (refer to graph and fig.1)
Operating Bandwidth: DC to 1000 MHz
Cut off Frequency (Fc): 460 MHz
Stopband Frequency (Fs): 480 MHz
Transition: 4 % (i.e., Fs / Fc = 1.04)*
* Roll-off can be trap enhanced for narrower transition
Stopband: > 40 dB at (480 MHz)
Optional attenuation: 15 to 70dB
Passband Loss: < 1dB, except < 3dB at cutoff Fc
Flatness: ±0.25 dB
Return Loss: >16 dB, (VSWR: 1.38 : 1)
Impedance: 75 ohms (50 ohms optional)
Connectors: 75 ohms, BNC (F/F)
Connector/ Impedance options: BNC/N/SMA; 50 ohms
Power pass: 1A max ( DC block optional)
Housing: Indoor or Outdoor
Standard Dimensions (in): 3.6L x 1.5H x 3.2W
Graph: LP7-460/480
| Mkr | Freq (MHz) | Channel (approx) | Attn (dB) |
| 1 Fc | 460.00 | 63 | -2.62 |
| 2 Fs | 480.00 | 67 | -44.77 |
Order information
Order as:
LP7-ch.(Fc/Fs) - indoor
LP7X -ch.(Fc/Fs) - outdoor
Specify Fc: Cut-off (channel or frequency)
Fs (freq) = Fc (freq) x 1.05
Ex: LP7-460/480 (or LP7-ch. 63/67)
(i,e., Fc = 460, Fs is 460 x 1.05 = 480 MHz - approx)