Gate Setup Menu (Option 90) Key Sequence: Shift > Sweep (3) key > Gated Sweep Setup SPA Gated Sweep Menu Gated Sweep Turns the Gated Sweep function On and Off. Gate Source External (Currently Not Used) Gate Polarity Rising/Falling Press to select the desired edge trigger to begin the gated sweep. Gate Delay Sets the start of the gated sweep indicated by the left blue line on the bottom graph. Gate Length Sets the time of the gated sweep indicated by the right blue line on the bottom graph. Zero Span Time Use this submenu key to set the time for the full length horizontal sweep of the time domain (bottom) graph. Back Returns to the “Sweep Menu” on page 2‑37.