NSTS1436 Apr. 2013 NewJRC SAW FILTER NSTS1436 Application 421.9MHz Low Power Transceiver Electrical Specification: (Table 1) The device characteristics are measured in the circuit shown in Fig.1. Table 1. Electrical Specifications Item Spec. Typ. Input and Output Impedance 50Ω - Nominal Center Frequency (f0) 421.9MHz - Insertion Loss 421.4~422.4MHz 3.3dB max. 2.5dB Response Variation 421.4~422.4MHz 1.5dB max. 0.3dB Input and Output VSWR 421.4~422.4MHz 2.5 max. 1.4 Out of B.