Chapter 8 373
N5531S Measuring Receiver Performance Verification
Performance Verification Tests
N5531S Measuring Receiver Performance
Verification
Table 8-6 Test Equipment
Instrument Critical Specifications
(for this test)
Recommended Model
Synthesized Signal Generator Frequency 50 MHz
Amplitude drift with temperature:
Must not drift > 0.01 dB /degree C
Agilent E8257D with UNR or
UNX (ultra low phase noise
performance) and option
1EH, (Improved Harmonics
below 2 GHz)
Calibrated Attenuator 0 to 50 dB range in 10 dB steps.
Calibrated at a metrology lab at 50 MHz.
VSWR at 50 MHz: <1.05:1
Example of calibration detail for the attenuator
used in this test:
“Using a dual-synthesizer, parallel
IF-substitution method. NIST traceability
achieved through a calibrated 1 kHz Ratio
transformer.
Cal frequency 50 MHz.
A minimum of six measurements were made at
each attenuator setting to find the mean value of
“measured change in insertion loss” and to
estimate the Standard Deviation of this Mean.”
Also see Table 8-10, “Example Test Record,” for
an example of calibrated attenuation and
attenuator uncertainty values.
Agilent 8496G
10 dB Attenuator
(2 each)
Used to minimize mismatch uncertainty.
Connected to both ports of the step attenuator.
Agilent 8491A
Attenuator Switch Driver Used to drive attenuator Agilent 11713A
Cable,
3.5 mm (m) to 3.5 mm (m)
High quality cable that is repeatable (can be
bumped or bent slightly and not cause measured
value to change).
DC to 26.5 GHz
92 cm (36 inches)
Insertion loss ~2 dB
Agilent 8120-4921
Cable,
BNC (m) to BNC (m)
For connecting time base of PSA to source 10
MHz input.
120 cm (48 inches long)
Agilent 10503A
Adapters
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