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Chapter 4 123
ESA Functional Tests
Displayed Average Noise Level
ESA Functional Tests
Test Description
The Displayed Average Noise Level is measured within the frequency range specified. The
analyzer input is terminated in either 50
Ω or 75 Ω, depending on analyzer options.
The test tunes the analyzer frequency across the band, uses the marker to locate the
frequency with the highest response, and then reads the average noise in zero span.
Figure 4-1 Equipment Setup
Frequency Range Model (75 Ω Input)
Maximum
(50 Ω Input)
TR Entry
10 MHz to 500 MHz E4401B – 66 dBmV 19
10 MHz to 500 MHz E4411B – 65 dBmV 20
501 MHz to 1.0 GHz E4401B, E4411B – 60 dBmV 21
1.01 GHz to 1.5 GHz E4401B – 56 dBmV 22
1.01 GHz to 1.5 GHz E4411B – 53 dBmV 23
Item
Critical Specifications
(for this test)
Recommended
Agilent Model
Adapters
Termination, 50 Ω
Type-N (m)
908A
Additional Equipment for 75 Ω Input
Termination, 75 Ω
Type-N (m)
909E
Adapter, Type-N (f),
to BNC (m), 75 Ω
1250-1534