Keysight N9038A, Service Manual

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678 Keysight N9038A MXE Service Guide
Tests
Second Harmonic Distortion (SHD)
Second Harmonic Distortion (SHD)
Test Limits
Overview
This test checks the second harmonic distortion of the EMI receiver 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 receiver to prevent the
source second harmonic from artificially raising the second harmonic product
displayed on the receiver.
This measurement is performed on RF Input 1 only.
Table 22-7 Second Harmonic Distortion Test Limits
Applied Frequency
Mixer Level
a
a. Mixer Level = Input Level − RF Attenuation
Distortion
40 MHz –15 dBm < –55 dBc
Table 22-8 Second Harmonic Distortion - Required Equipment
Item
Critical Specifications
(for this test)
Recommended
Keysight Model
Adapter
Type-N (m) to BNC (f)
Frequency: 40 to 80 MHz
VSWR: < 1.05:1 1250-1476
Adapter
a
BNC (f) to SMA (m)
Frequency: 40 to 80 MHz 1250-1200
Adapter
b
3.5 mm (f) to 3.5 mm (f)
Frequency: 40 to 80 MHz
VSWR: < 1.1:1 83059B
Adapter
c
2.4 mm (f) to 3.5 mm (f)
Frequency: 40 to 80 MHz
VSWR: < 1.1:1 11901B
Cable, 120 cm
BNC (m) to BNC (m)
(2 required)
Frequency: 10 to 80 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
Signal Generator Frequency: 50 MHz
Spectral Purity: Better than –30 dBc
PSG
a. Quantity 2 required for Option C35 (3.5 mm RF Input 1) or Option 544 (44 GHz Frequency
Range)