Agilent Technologies E1343A Service Manual download pdf (Page 28)

3. Repeat for Channels 01 - 07 LO and Channel 90 LO

– Repeat steps 1 and 2 for channels 01 - 07 LO and 90 LO

– Use CLOS (@nncc) and OPEN (@nncc), where nn =

card # and

cc = channel # (omit leading zeroes in nn)

– For Channel 90 LO, subtract combined value of R21 + R27

Ch 00 - 07 and 90

GU Measurements

1. Make Hardware Connections

– Turn mainframe power OFF

– Connect DMM leads as shown in Figure 2-5

– Turn mainframe power ON

2. Measure Channel 00 GU Resistance

– Send *RST to multiplexer

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

– Trigger the DMM with TRIG SGL and note reading

– Send OPEN (@nn00) to open channel 00

– Subtract measured value of R22 from DMM reading

– Enter the result in Table 2-2 for Channel 00 GU

Figure 2-4. Ch 0-7 and 90 LO Measurement Connections

Figure 2-5. Ch 00-07 and 90 GU Measurements Connections

26 Verification Tests Chapter 2

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Agilent Technologies E1343A Service Manual Page 28