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Tree Switch LO

Channel Measurements 1. Make Hardware Connections

• Turn mainframe power OFF

• Connect DMM as shown in Figure 2-5

• Turn mainframe power ON

2. Check for Stuck Channels

• Send *RST to the FET Multiplexer to open all channels

• Trigger the DMM with TRIG SGL and note reading

• Verify the reading is greater than 10 kΩ

3. Check Tree Switch LO Closed Channel Resistance

• Send SCAN:PORT ABUS to enable the tree switches

• Send CLOS (@nn00) to close channel 00 and the A tree switch,

where nn is the card number (typically 01)

• Trigger the DMM with TRIG SGL and note the reading

• Enter the result in Table 2-1 for Tree A LO

• Send OPEN (@nn00) to open channel 00, where nn is the card

number

• Send CLOS (@nn15) to close channel 15 and the B tree switch,

where nn is the card number

• Trigger the DMM with TRIG SGL and note the reading

• Enter the result in Table 2-1 for Tree B LO

• Send *RST to the FET Multiplexer

Agilent E1300B/E1301B

Figure 2-5. Tree LO Resistance Test Connections

Verification Tests 2-7

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Agilent Technologies E1356A Manuale di Servizio Pagina 25