Agilent Technologies 34420A Spécifications télécharger pdf (Page 51)

To Make Voltage Ratio and Difference Measurements

To calculate a voltage ratio, the meter measures the voltages applied

to the Channel 1 input terminals and Channel 2 input terminals. The

calculation is as follows:

Difference = ((Ch 1 voltage − Ch 1 Null ) − (Ch 2 voltage − Ch 2 Null )) − Null *

Ratio =

(Ch 1 voltage − Ch 1 Null )

(Ch 2 voltage − Ch 2 Null )

• Maximum input signal on Channel 1 is 120 Vdc, the meter will

autorange on the actual input or can be manually set.

• Maximum input signal on Channel 2 is 12 Vdc, the meter will

autorange on the actual input or can be manually set.

• Maximum voltage difference between Channel 1 LO and

Channel 2 LO is 150 Vdc.

• Null, if used, is independent for each channel. An additional null* of

the difference can also be made. If null is used on either input channel,

the ‘Null’ annunciator will flash when the difference function is

selected. If you null the difference, the ‘Null’ annunciator will be

steady.

*The difference null is only available from the front panel.

RED

DC Voltage

CH1 BLACK

CH2 GREEN

DC Voltage

WHITE

DIFFERENCE

RATIO

Chapter 2 Front-Panel Operation

To Make Voltage Ratio and Difference Measurements

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Agilent Technologies 34420A Spécifications Page 51