The negative sweep gate and positive sweep gate are produced by the Sweep Generator Card when triggered by which signal?

The negative sweep gate and positive sweep gate are produced by the Sweep Generator Card when triggered by which signal?

• A. The sync trigger
• B. The master trigger
• C. The heading marker pulse
• D. The cursor strobe

Answer: (A)

The sweep generator relies on a precise timing signal to start each horizontal sweep, and that signal is the sync trigger. When the sync trigger arrives, the Sweep Generator Card opens two gates: one for the positive portion of the sweep and one for the negative portion. This gating creates a clean, repeatable sweep synchronized to the radar’s timing, so the display shows the returns in lockstep with the transmitter. Other signals serve different roles. A master trigger may be used for higher-level timing or coordination, but not the dedicated, per-sweep synchronization that the sweep needs. The heading marker pulse places a marker on the display, not the actual sweep timing. The cursor strobe is for cursor measurement rather than gating the sweep.

The sweep generator relies on a precise timing signal to start each horizontal sweep, and that signal is the sync trigger. When the sync trigger arrives, the Sweep Generator Card opens two gates: one for the positive portion of the sweep and one for the negative portion. This gating creates a clean, repeatable sweep synchronized to the radar’s timing, so the display shows the returns in lockstep with the transmitter.

Other signals serve different roles. A master trigger may be used for higher-level timing or coordination, but not the dedicated, per-sweep synchronization that the sweep needs. The heading marker pulse places a marker on the display, not the actual sweep timing. The cursor strobe is for cursor measurement rather than gating the sweep.