Agilent Technologies E1401-90493 Amplitude Accuracy Measured Amplitude Amptd

146 Chapter 2
Performance Verification Tests
19. Overall Absolute Amplitude Accuracy: Agilent E4401B and E4411B
Figure 2-22 Amplitude Accuracy Test Setup
12.Set the analyzer as follows:
FREQUENCY, Center Freq, 50 MHz
SPAN, 6 kHz
BW/Avg, Res BW, 1 kHz
AMPLITUDE, More, Y Axis Units (or Amptd Units), dBm
AMPLITUDE, Ref Level, 0 dBm
Attenuation, 10 dB (Man)
13.Perform the following steps for each of the nominal amplitude values
listed in Table 2-30:
a. Set the 1 dB step attenuator as indicated in Table 2-30.
b. Set the 10 dB step attenuator as indicated in Table 2-30.
c. Press Single and wait for the sweep to finish.
d. Press Peak Search (or Search). Even though the signal may be
slightly above the reference level for the first nominal amplitude
setting, the marker can still make a valid measurement.
e. Record the marker (Mkr1) amplitude value as the measured
amplitude in Table 2-30.
f. If the nominal amplitude is 0 dBm, calculate the amplitude
accuracy as follows:
g. If the amplitude is less than 0 dBm, calculate the amplitude
accuracy as follows:
h. Record the amplitude accuracy in the performance verification
Amplitude Accuracy Measured Amplitude Amptd0dBm –=
Amplitude Accuracy Measured Amplitude Amptd0dBm ActualTotalAtten RefAtten0dB +–()–=