Agilent Technologies E1346A Service Manual download pdf (Page 24)

Ch 90-92

LO Measurements 1. Make Hardware Connections

• Turn mainframe power OFF

• Connect DMM leads as shown in Figure 2-4

• Turn mainframe power ON

1. Measure Channel 90 LO Resistance

• Send *RST to multiplexer

• Send CLOS (@nn00) to close chan 90 and 00, where nn = card #

(omit leading zeroes in nn ).

• Trigger the DMM with TRIG SGL and note reading

• Send OPEN (@nn00) to open channel 90 and 00

• Subtract measured value of R42 from DMM reading

• Enter the result in Table 2-2 for Channel 90 LO

2. Repeat for Channels 91 and 92 LO

• Repeat steps 1 and 2 for channels 91 and 92 LO

• Use CLOS (@nncc) and OPEN (@nncc), where nn = card # and cc

= channel # (omit leading zeroes in nn ). Use 08 for channel 91 and

16 for channel 92.

Figure 2-4. Ch 90 LO Measurement Connections

2-6 Verification Tests

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Agilent Technologies E1346A Service Manual Page 24