124 Chapter 4
ESA Functional Tests
Displayed Average Noise Level
ESA Functional Tests
Procedure (10 MHz to 500 MHz) E4401B and E4411B
1. Connect the equipment as shown in Figure 4-1.
2. Press System, Power On/Preset, Preset Type (Factory), Preset on the analyzer. Wait for the
preset routine to finish. Set the analyzer by pressing the following keys:
FREQUENCY, Start Freq, 10, MHz
Stop Freq, 500, MHz
AMPLITUDE, –70, dBm (50 Ω Input only)
AMPLITUDE, More, Y Axis Units, dBmV (75 Ω Input only)
AMPLITUDE, Ref Level, –21.24, dBmV (75 Ω Input only)
BW/Avg, Res BW, 1, MHz
Video BW, 10, kHz
3. Press the following keys on the analyzer:
Single
BW/Avg, Average (On), 3, Enter
Single
Wait until AVG 3 is displayed to the left of the graticule (the analyzer will take 3
sweeps, then stop).
4. Press Peak Search. Record the marker frequency next to your analyzer model in the
Measured Frequency column as entry (a) or (b) in Table4-1 on page 138 for 10 MHz to
500 MHz.
5. Press the following keys on the analyzer:
Sweep, Sweep (Cont)
BW/Avg, Average (Off)
BW/Avg, Res BW (Auto)
Video BW (Auto)
SPAN, 50, kHz
FREQUENCY
6. Press Center Freq, and set the center frequency of the analyzer to the frequency recorded
in the Measured Frequency column as entry (a) or (b) of Table 4-1 on page138 for
10 MHz to 500 MHz.
7. Press the following keys on the analyzer:
BW/Avg, Res BW, 1, kHz
Video BW, 30, Hz
Single
Wait for the sweep to finish.
8. Press the following keys on the analyzer:
Display, Display Line (On)
Adjust the display so that it is centered on the average trace noise, ignoring any
residual responses.