Keysight NFA Series Noise Figure Analyzers Service Guide 501
Functional Tests
Amplitude Accuracy at 50 MHz
Amplitude Accuracy at 50 MHz
Test Limits
Amplitude Accuracy should remain within 1.13 dB of the measured source
value across the range of source levels and changes in resolution bandwidth.
The Preamp (option P03, P07, P13, P26, P32, P44) should remain within ±1.3
dB of measured values.
A synthesized sweeper is used as the signal source for the test. The source
amplitude is varied using the signal source amplitude control. The attenuation
and resolution bandwidth are varied on the signal analyzer. The source
amplitude is measured by the power meter and signal analyzer at each setting,
and the values compared. The difference between each pair of measurements
indicates the amplitude accuracy.
Item Critical Specifications
Recommended
Keysight Model
Adapter
a
Type-N (m), to 3.5 mm (m) 1250-1743
Adapter
a
3.5 mm (f) to 3.5 mm (f) 83059B
Adapter
b
2.4 mm (f) to 3.5 mm (m) 11901A
Adapter
b
2.4 mm (f) to 3.5 mm (f) 11901B
Attenuator, 30 dB Accuracy: < 0.5 dB at 50 MHz 11708A
Cable 3.5 mm, 1 meter 11500E
Cable BNC, 120 cm 10503A
Power Meter Compatible with power sensor E4418B
Power Sensor Amplitude Range: −25 dBm to 10 dBm 8485A
Power Splitter 3.5 mm (f) connectors
6 dB loss
11667B
Synthesized Sweeper Typical Temperature Stability: 0.01 dBc/°CPSG
a. For N8973B, 74B, 75B
b. For N8976B
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