698 Keysight N9038A MXE Service Guide
Tests
Frequency Response (Flatness) - Preamp On
6. Preset the receiver by pressing Mode, Spectrum Analyzer, Mode Preset.
7. Set up the receiver by pressing:
Mode Setup, EMC Standard, None
Input/Output, More, Freq Ref In, External
FREQ Channel, Center Freq, 50, MHz
SPAN X Scale, Span, 50, kHz
AMPTD Y Scale, More, Internal Preamp Full Range
AMPTD Y Scale, Attenuation, Mech Atten, 0 dB
AMPTD Y Scale, Ref Level, −55, dBm
8. Perform the following steps for each row listed in Table 22-20 that applies
to the frequency range of the instrument being tested:
a. Tune the receiver center frequency to the value listed in the Center
Frequency column of Table 22-20 by pressing FREQ Channel,
Center Freq, [Value].
b. Tune the signal generator frequency to the value listed in the Center
Frequency column of Table 22-20.
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 22-20.
f. If the Center Frequency is greater than 3.6 GHz center the
preselector by pressing Peak Search, AMPTD X Scale, Presel
Center.
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 22-20.
i. Calculate the measurement error using the following equation, and
record the results under the Measurement Error column in Table
22-20:
Measurement Error = Meas_Amp − Power_Meter
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