Agilent Technologies 8753ES Option 011 Service Manual page 73

Note that the analyzer will display units as mU µU or nU, which are abbreviations for
−3 −6
10 units, 10 units, and 10
15.Press
IMAGINARY
the column marked "Imaginary Part" in the performance test record. Note that the
analyzer will display units as mU µU or nU, which are abbreviations for 10
−9
units, and 10 units, respectively.
16.Repeat steps 12 through 15 for each setting of the step attenuator as written in the
performance test record.
17.For each pair of real and imaginary parts calculate the value given by the formula:
10 log [(Real Part)
10
record in the "Test Port Measurement" column (column "G").
18.Calculate the dynamic accuracy for each attenuator setting by using the formula:
|G − F| (the absolute value of the difference between the values in column "G" and
column "F").
In Case of Difficulty
1. If the analyzer fails the test at all power levels, be sure you followed the recommended
attenuator settings as listed in the performance test record. Repeat this performance
test.
2. If both test port measured values are out of specifications:
a. Recalibrate the power meter.
b. Repeat this performance test.
3. If the analyzer fails either channel B or channel A dynamic accuracy at lower power
levels:
a. Perform "IF Amplifier Correction Constants (Test 51)" on page 3-16
Correction Constants (Test 52)" on page
b. Repeat this performance test.
c. If it still fails, replace the A10 Digital IF assembly.
d. Repeat the two adjustment procedures mentioned step a, and then repeat this
performance test.
Chapter 2
−9
units, respectively.
. Write the mean value (which appears on the analyzer's display) in
2 2
+ (Imaginary Part)
12. Receiver Magnitude Dynamic Accuracy
]. Write the result in the performance test
3-18.
Performance Tests
−3 −6
units, 10
and "ADC Offset
2-57