Keysight Technologies N9040B UXA Signal Analyzer Service Guide 513
Functional Tests
Second Harmonic Distortion (SHD)
Second Harmonic Distortion (SHD)
Test Limits
This test checks the second harmonic distortion of the signal analyzer by
tuning to twice the input frequency and examining the level of the distortion
product. A low pass filter is inserted between the source and the signal
analyzer to prevent the source second harmonic from artificially raising the
second harmonic product displayed on the analyzer.
Applied Frequency
Mixer Level
a
a. Mixer Level = Input Level - RF Attenuation
Distortion
40 MHz –15 dBm < –60 dBc
Item
Critical Specifications
(for this test)
Recommended
Keysight Model
Adapter
Type-N (m) to BNC (f)
Frequency: 10 MHz to 80 MHz
VSWR: < 1.05:1
1250-1476
Adapter
BNC (f) to SMA (m)
Frequency: 40 to 80 MHz 1250-1200
Adapter
3.5 mm (f) to 3.5 mm (f)
Frequency: 10 MHz to 80 MHz
VSWR: < 1.1:1
83059B
Cable, BNC
120 cm (2 required)
Frequency: 10 to 40 MHz 10503A
Filter,
50 MHz Low Pass
Cutoff Frequency: 50 MHz
Rejection at 65 MHz: > 40 dB
Rejection at 75 MHz: > 60 dB
0955-0306
Synthesized Sweeper Frequency: 50 MHz
Spectral Purity: Better than –30 dBc
PSG
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