700 Keysight N9038A MXE Service Guide
Tests
Frequency Response (Flatness) - Preamp On
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.Tune the signal generator to 50 MHz and set the output power to
−54 dBm.
13.Perform the following steps for each row listed in Table 22-21:
a. Tune the receiver center frequency to the value listed in the Center
Frequency column of Table 22-21 by pressing FREQ Channel,
Center Freq, [Value]
b. Tune the signal generator frequency to the value listed in the Center
Frequency column of Table 22-21.
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 −60 dBm ± 0.1 dB.
e. Enter the power meter amplitude value into the Power Meter
Amplitude column of Table 22-21.
f. On the receiver, press Peak Search to position the marker on the
peak of the signal.
g. Enter the receiver marker amplitude value into the Receiver
Amplitude column of Table 22-21.
h. Calculate the measurement error using the following equation, and
record the results under the Measurement Error column in Table
22-21:
Measurement Error = Meas_Amp − Power_Meter
i. 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 22-21:
Normalized to 50 MHz = Meas_Error − Meas_Error @ 50 MHz
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