Agilent Technologies 75000 B Series Service Manual page 23

LO Channel
Measurements
Figure 2-3. LO Channel Resistance Test Connections
• Repeat step 3 for channels 01 through 15
• Use CLOS (@nncc), where nn is the card number and cc is the
channel number
1.
Make Hardware Connections
• Turn mainframe power OFF
• Connect DMM as shown in Figure 2-3
• Turn mainframe power ON
Agilent E1300B/E1301B
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 LO Closed Channel Resistance
• Send CLOS (@nn00) to close channel 00, 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 channel 00 LO
• Send OPEN (@nn00) to open channel 00, where nn is the card
number
4.
Repeat for Channels 01 through 15
• Repeat step 3 for channels 01 through 15
• Use CLOS (@nncc) and OPEN (@nncc), where nn is the card
number and cc is the channel number
Verification Tests 2-5