HP ESA-L1500A, Руководство пользователя и калибровки

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Chapter 9 243
Performance Verification Tests
13. Frequency Response
13. Frequency Response
The output of the synthesized signal generator is fed through a power
splitter to a power sensor and the spectrum analyzer. The synthesized
signal generator’s power level is adjusted at 50 MHz to place the
displayed signal at the spectrum analyzer center horizontal graticule
line. The measuring receiver, used as a power meter, is placed in RATIO
mode. At each new synthesized signal generator frequency and
spectrum analyzer center frequency setting, the synthesized signal
generator’s power level is adjusted to place the signal at the center
horizontal graticule line. The measuring receiver displays the inverse of
the frequency response relative to 50 MHz.
For frequencies below 100 kHz, a synthesizer/function generator is used
in place of the synthesized signal generator. A DVM and 50
Ω
load are
used in place of the power sensor and measuring receiver.
The related adjustments for this performance test are “Corrected
Flatness” and “Uncorrected Flatness.”
Analyzers with 75
Ω
inputs are tested only down to 1 MHz. Also, a
system flatness characterization is performed.
Equipment Required
Synthesized signal generator
Measuring receiver (used as a power meter)
Synthesizer/function generator
Power sensor, 100 kHz to 1800 MHz
Power splitter
Adapter, Type-N (f) to APC 3.5 (f)
Adapter, Type-N (m) to Type-N (m)
Adapter, Type-N (m) to BNC (f) (2 required)
Dual banana plug to BNC (f)
BNC tee (BNC f,m,f)
Cable, BNC, 122-cm (48-in) (2 required)
Cable, Type-N, 152-cm (60-in)
50
Ω
termination BNC (m)
DVM HP3458, or HP34401A only