Chapter 3 3-13
Functional Testing
Displayed Average Noise Level
2. 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 and then stop).
3. Press Peak Search. Record the frequency in the Measured Frequency
column (f) in Table 3-1 for 2.01 GHz to 3.0 GHz.
4. Press the following keys on the analyzer:
Sweep, Sweep (Cont)
BW/Avg, Average (Off)
BW/Avg, Resolution BW (Auto)
Video BW (Auto)
SPAN, 50 kHz
FREQUENCY
5. Press Center Freq. Set the center frequency of the analyzer to the
frequency recorded in the Measured Frequency column (f) in
Table 3-1 for 2.01 GHz to 3.0 GHz.
6. Press the following keys on the analyzer:
BW/Avg, 1 kHz
Video BW Auto Man, 30 Hz
Single
Wait for the sweep to finish.
7. Press the following keys on the analyzer:
Display, Display Line (On)
Adjust the display line so that it is centered on the average trace
noise, ignoring any residual responses.
8. If the analyzer is an E4402B or an E4403B, record the display line
amplitude setting as TR Entry 8 in Table 3-1. Otherwise, record the
display line amplitude setting as TR Entry 9 in Table 3-1. The
Average Noise Level should be less than the maximum.
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