Agilent Technologies 6814B, 6834B, 6843A Example, Voltm Step Syncsour Phase Syncphas Initimmed

Front Panel Operation - 4

On three-phase ac sources, phase 1 is normally offset by 0° from the internal phase reference while phase 2 and phase 3 are offset by 240° and 120° respectively. Therefore, synchronized transient events will occur at the phase angle programmed for the phase 1 output, but at different phase angles on the phase 2 and phase 3 outputs.

This is illustrated in the following figure, where the transient occurs at the 90 ° angle programmed for the phase 1 output, but at 330° and 210° for the phase 2 and 3 outputs, because of the default offsets for these outputs.

4	Trigger
	0
	90
	VOLT T level
01	VOLT level

phase = 0

	VOLT T level
02	VOLT level
	phase = 240
	0

	VOLT T level
03	VOLT level

330

0

210

phase = 120

Figure 4-8. Phase Synchronization on Three-phase Sources

Example

µThis example synchronizes a change at 90° on phase 1. First, access the

Voltage menu and program the immediate and triggered voltage levels, followed by the voltage transient mode. Check that the φ1, φ2, and φ3

annunciators are all lit, indicating that commands will be sent to all three phases. If not, press Phase Select until all three annunciators are lit.

Press Trigger Control. Press  until you access the sync source command. On the Entry keypad, press ° once to obtain PHASE. Press Enter.

Access the Trigger Control menu again and press  to access the sync phase reference parameter. On the Entry keypad, program a 90° phase reference by entering 9 0 Enter.

Then press Trigger Control and Enter, followed by Shift Trigger.

Display

VOLT 120

VOLT:T 150

VOLT:M STEP

SYNC:SOUR PHASE

SYNC:PHAS 90

INIT:IMMED

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