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Performance Verification Tests
c. To achieve -16 dBm at the signal analyzer and -6 dBm at the power sensor:
i. Keep power at the signal analyzer above -20 dBm.
ii. Keep power at the power sensor below -1 dBm.
d. Set the signal analyzer center frequency.
e. Set the power meter measurement frequency.
f. On the signal analyzer, perform a peak search, and select Marker Delta.
g. On the power meter, set the relative power reading (the power meter should now display 0 dB).
h. Set the signal source frequency to twice the LO Frequency.
i. Set the signal analyzer center frequency to twice the LO Frequency.
j. Set the power meter measurement frequency to twice the LO Frequency.
k. On the signal analyzer, perform a peak search.
l. Note the marker delta value as well as the relative power reading on the power meter in the Test
Record Card (see Marker Delta 1 column).
m. Record the flatness correction value in the Test Record Card for each LO frequency as the dif-
ference between the marker delta (Marker Delta 1) reading on the signal analyzer and the relative
power reading on the power meter. The Test Record Card PDF calculates the flatness correction
value for you.
2. Connect the equipment as shown in Figure 2.
a. Disconnect the 10 dB fixed attenuator from the two-resistor splitter.
b. Using an RF cable, connect the 10 dB fixed attenuator to the M9302A LO OUT port,.
3. Measure the second harmonic distortion. For each LO frequency in Table 5:
a. Set the M9302A frequency. (Use the M9302A soft front panel software to do this.)
b. Set the signal analyzer center frequency.
c. On the signal analyzer, perform a peak search, and select Marker Delta.
d. Set the signal analyzer center frequency to twice the LO frequency.
e. On the signal analyzer, perform a peak search.
f. Note the marker delta value in the Test Record Card (see Marker Delta 2 column). Second har-
monic distortion is defined as the marker delta value from the signal analyzer minus the flatness cor-
rection. The Test Record Card PDF calculates the second harmonic distortion value for you.
Measurement Uncertainty
The expanded uncertainty of measurement for this test (noted as the "Uncertainty" value provided in the
Record Card
-- see page 36) represents the standard uncertainty of measurement multiplied by the coverage factor
k=2. For normal distribution, this corresponds to a coverage probability of approximately 95%.
30
Agilent M9302A PXI Local Oscillator Service Guide
Test
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