The 87 Series SWR Bridges are precision, high directivity measurement components- ideal for SWR and return loss measurements. This High Directivity Bridges features a 6.5 dB nominal loss, a -35 dB minimum directivity and an accuracy of 0.018 +/- 0.12p2. Option 001 features a -38 dB minimum directivity and an accuracy of 0.013 +/- 0.12p2.