Agilent Technologies E4418B Service Manual page 54

Performance Tests
Power Reference Level Test
4. Preset the power meter:
Preset
Press , then
Local
Set the Agilent 432A RANGE switch to Coarse Zero. Adjust the front
panel Coarse Zero control to obtain a zero meter indication.
5. Zero the Agilent 432A test power meter:
• Fine zero the Agilent 432A on the most sensitive range.
• Set the RANGE switch to 1 mW.
6. Set the DVM to measure microvolts.
7. Connect the positive and negative input leads to the V
connectors respectively, on the rear panel of the test power meter.
8. Observe the reading on the DVM. If less than 400 µV, proceed to the
next step. If 400 µV or greater, press and hold the test power meter
Fine Zero switch and adjust the Coarse Zero control so that the DVM
indicates 200 µV or less. Release the Fine Zero switch and proceed to
the next step.
9. Round the DVM reading to two decimal places.
Record this reading as V
• V ___________
0
10.Turn the power reference on:
Press Zero ,
Power Ref On
Cal
11.Round the DVM reading to two decimal places.
Record this reading as V
• V ___________
1
12.Disconnect the DVM negative input lead from the V
Agilent 432A. Reconnect it to the Agilent 432A chassis ground.
13.Observe the DVM reading. Record the reading as V
• V __________
comp
14.Calculate the Power Reference Oscillator power using equation 2-4.
15.Verify that P is within the limits shown in Table 2-5 and record the
meas
reading in the table.
Table 2-5: Power Reference Level Test Result
Min Max
0.999 mW 1.001 mW
2-18
on the power meter.
Confirm
.
0
.
.
1
Actual Result
________________
Agilent E4418B/E4419B Service Guide
and V
comp RF
connector on the
RF
.
comp