Agilent Technologies 75000 SERIES B, Руководство по обслуживанию

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3.
Check Channels Leakage
•
Send CLOS(@
nn
00) to the FET Multiplexer to close channel
00, where
nn
is card number (typically 01)
•
Send TRIG SGL to DMM
•
Record the DMM reading in Table 2-1
Positive Polarity, HI to LO, Channels
•
Send OPEN (@
nn
00) to the FET Multiplexer
4.
Check Tree Leakage
•
Send SCAN:PORT ABUS to the FET Multiplexer to enable the
Tree Switches
•
Send CLOS(@
nn
00) to the FET Multiplexer to close channel
00 and Tree Switch A, where
nn
is the card number (typically
01)
•
Send TRIG SGL to DMM
•
Record the DMM reading in Table 2-1
Positive Polarity, HI to LO, Tree A
•
Send OPEN (@
nn
00) to the FET Multiplexer
•
Send CLOS(@
nn
15) to the FET Multiplexer to close channel
15 and Tree Switch B
•
Send TRIG SGL to DMM
•
Record the DMM reading in Table 2-1
Positive Polarity, HI to LO, 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 2-7
•
Turn power supply and mainframe power ON
•
Set power supply output to +10 Vdc
±
0.1 Vdc
6.
Repeat Steps 2 through 4
•
Record all results in Table 2-1 as
Negative Polarity, HI to LO
Verification Tests 2-13