Agilent Technologies manual Avg. Res 6625A / 6628A 6626A / 6629A, Output Outputs

VSET 1,.45

If the output channel is operating in constant voltage mode (CV annunciator on) then the actual voltage is the programmed voltage, but in CC mode of operation (CC annunciator on), the programmed voltage is the voltage limit for that output.

When programming a value of voltage, the current setpoint will be changed if the total power is greater than the power boundary (see Figure 4-2).

Example:	ISET 4,1.5 sets current to 1.5 A
	VSET 4,50 sets voltage to 50 V

Sending the VSET command caused the current ISET to be reduced to 1.03 A. This is an example of power limiting changing a supply setting. When this occurs, the "couple parameter" bit (see Table 5-5) in the status register is set.

	Table 5-4. Programmable Output Range
	Model	Operating	Output Volt	Output Curr **
Output Configuration		Range *	(Avg. Res.)	(Avg. Res.)
6625A / 6628A	6626A / 6629A
OUTPUT	OUTPUTS	Low	0-7 V	0-15 mA
			(0.460 mV)	(1 μA)
1	1 & 2	High	0-50 V	0-0.5 A
			(3.2 mV)	(33 μA)
OUTPUT	OUTPUTS	Low	0-16 V	0.2 A
			(1.0 mV)	(13 μA)
2	3-4	High	0-50 V	0-2 A
(1,2-6628A)	1,2,3,4-6629A)		(3.2 mV)	(131 μA)

*The maximum programmable voltage values for each range are 1% higher than the rated voltage and the maximum programmable current values for each range are 3% higher than the rated current.

**Each channel wakes up to values stored in state register 0. The factory set values are shown in the first part of Table 5-3. All other registers are set to these settings. Volatile registers 4-10 always power-up to these conditions.

To readback the programmed voltage setting for output 1, send the query:

VSET? 1

and address the supply to talk. If you want to know the value of the actual output voltage of output 1, send the query:

VOUT? 1

The results are placed on the GP-IB and read into the controller when the supply is addressed to talk.

Note	The power supply will round the VSET and ISET settings to the nearest multiple of their resolution.
	Table 5-4 lists the average resolution of these settings.

72Remote Operation