Keysight N9038A, Руководство по обслуживанию

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694 Keysight N9038A MXE Service Guide
Tests
Frequency Response (Flatness)
RF Input 2
9. Move the power splitter from RF Input 1 to RF Input 2.
10. Select RF Input 2 on the receiver by pressing Input/Output , RF Input , RF
Input Port , RF Input 2 .
11. Tune the receiver to a center frequency of 50 MHz by pressing FREQ
Channel, Center Freq , 50 MHz .
12. On the receiver, press Restart .
13. Set the signal generator output power to -4 dBm .
14. Perform the following steps for each row listed in Table 22-18 :
a. Tune the receiver center frequency to the value listed in the Center
Frequency column of Table 22-18 by pressing FREQ Channel ,
Center Freq , [Value]
b. Tune the signal generator frequency to the value listed in the Center
Frequency column of Table 22-18 .
c. Enter the power sensor calibration factor into the power meter for
the signal generator frequency.
d. Adjust the signal generator output power for a power meter reading
of -10 dBm ±0.1 dB.
e. Enter the power meter amplitude value into the Power Meter
Amplitude column of Table 22-18 .
f. On the receiver, press Restart .
g. On the receiver, press Peak Search to position the marker on the
peak of the signal.
h. Enter the receiver marker amplitude value into the Receiver
Amplitude column of Table 22-18 .
i. Calculate the measurement error using the following equation, and
record the results under the Measurement Error column in Table
22-18 :
Measurement Error = Meas_Amp
−
Power_Meter
j. Calculate the frequency response error normalized to 50 MHz using
the following equation, and record the results under the Normalized
to 50 MHz column in Table 22-18 :
Normalized to 50 MHz = Meas_Error
−
Meas_Error @ 50 MHz