Which card produces the reference sweep and the negative/positive sweep gates when triggered by the sync trigger?

Which card produces the reference sweep and the negative/positive sweep gates when triggered by the sync trigger?

• A. Indicator Card
• B. Plan-Position Indicator Card
• C. Microswitch unit
• D. Sweep Generator Card (A3A2)

Answer: (D)

The timing and gating that define the sweep itself come from the Sweep Generator Card. When the sync trigger fires, this card creates the reference sweep waveform—the time base that drives the display—and it also outputs the negative and positive sweep gates that mark the sampling windows within that sweep. In other words, the sweep generator is responsible for both the continuous sweep and the gate signals that determine when measurements or displays align with the sweep. The other cards don’t generate the sweep or its gates. Indicator and Plan-Position Indicator cards are mainly display/output modules, showing results or position information, while the Microswitch unit handles physical switch-related actions. They don’t produce the time base or gating signals centered on the sync trigger.

The timing and gating that define the sweep itself come from the Sweep Generator Card. When the sync trigger fires, this card creates the reference sweep waveform—the time base that drives the display—and it also outputs the negative and positive sweep gates that mark the sampling windows within that sweep. In other words, the sweep generator is responsible for both the continuous sweep and the gate signals that determine when measurements or displays align with the sweep.

The other cards don’t generate the sweep or its gates. Indicator and Plan-Position Indicator cards are mainly display/output modules, showing results or position information, while the Microswitch unit handles physical switch-related actions. They don’t produce the time base or gating signals centered on the sync trigger.