LIGO Document T050250-v1
- The delay line phase shifter uses a variable length stripline to delay the input signal by a selectable amount. Eighteen RF switches are used to route the signal either through fixed delay taps or short bypass paths (see schematics D050339). The fixed delay taps are 1/16 ns, 1/8 ns, 1/4 ns, 1/2 ns, 1 ns, 2 ns, 4 ns, 8 ns and 16 ns in length. Any delay between 0 ns and 31.9375 ns can bee added in steps of 0.0625 ns by using front-panel mounted toggle switches or through a digital interface such as EPICS.
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