The 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. Key features: Improves measurement accuracy of distortion tests. Compatible with all spectrum analyzers and meters. 55–880 MHz operation. Extend the range and accuracy of fiber-optic measurements. REMOVED FROM SERVICE, EXCELLENT CONDITION. NO ACCESSORIES. GUARANTEED FOR 30 DAYS. |