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• Record the DMM reading in Table 2-1

Positive Polarity, LO to Chassis, Channels

• Send OPEN (@nn00) to the FET Multiplexer

4. Check Tree Leakage Current

• Send SCAN:PORT ABUS to the FET Multiplexer

• Send CLOS(@nn00) to the FET Multiplexer to close channel

00 and Tree A, where nn is the card number (typically 01)

• Send TRIG SGL to DMM

• Record the DMM reading in Table 2-1

Positive Polarity, LO to Chassis, Tree A

• Send OPEN (@nn00) to the FET Multiplexer

• Send CLOS(@nn15) to the FET Multiplexer to close channel

15 and Tree B

• Send TRIG SGL to DMM

• Record the DMM reading in Table 2-1

Positive Polarity, LO to Chassis, Tree B

• Send *RST to the FET Multiplexer

5. Change Polarity

• Turn power supply and mainframe power OFF

• Connect DMM, power supply, and resistor as shown in Figure

2-11

• Turn power supply and mainframe power ON

6. Repeat Steps 2 through 4

• Record all results in Table 2-1 as

Negative Polarity, LO to Chassis

2-18 Verification Tests

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Agilent Technologies E1356A Manuale di Servizio Pagina 36