Call Us : (800) 673-4102
T he Trilithic VF-4 Tunable Preselector re-selector Filter allows you to improve the accuracy of your distortion tests by providing the preselector needed to accurately measure composite triple beat, cross modulation and other spurious signals in a working CATV system.
A VF-4 filter blocks illegitimate signals ¿ which spectrum analyzers and signal level meters can generate because of input overload ¿ and passes only the carrier to be analyzed to the instrument's input. As a result, a VF-4 can improve an instrument's reliable measurement range by as much as 30 dB.
Features
| Frequency Range | 55-880 MHz in four bands |
| Shape Factor | (30 dB BW / 3 dB BW) = 2.2 / 1 maximum |
| Insertion Loss | 1.5-3.5 dB, depending on band |
| In-channel VSWR | 1.5:1, maximum |
| Shape Factor | VF-1 andVF-3: (30 dB BW / 3 dB BW) = 3.5:1 VF-2 and VF-4: (30 dB BW / 3 dB BW) = 2.2:1 |
| Frequency Range | 50-1000 MHz |
| Nominal Gain | 20 dB @ 600 MHz 17 dB @ 750 MHz 16 dB @ 1000 MHz |
| Impedance | 75 Ohms, nominal |
| Noise Figure | 5 dB |
| Power | Internal NiCad battery, 4 hours operation per charge |
Trilithic VF-4-XX
