Table 2.

Composite excitation waveform for detection of echoes at six τ values with 4-step phase cycling

	Segment 1			Segment 2			Segment 3			Segment 4
Trigger	ph1	ph2	τ, μs	ph1	ph2	τ, μs	ph1	ph2	τ, μs	ph1	ph2	τ, μs
1	+x	+x	1	−x	+x	1	+x	+x	3	−x	+x	3
2	+x	−x	1	−x	−x	1	+x	−x	3	−x	−x	3
3	+x	+x	5	−x	+x	5	+x	+x	7	−x	+x	7
4	+x	−x	5	−x	−x	5	+x	−x	7	−x	−x	7
5	+x	+x	9	−x	+x	9	+x	+x	11	−x	+x	11
6	+x	−x	9	−x	−x	9	+x	−x	11	−x	−x	11