Keysight N8973B User Manual

514 Keysight NFA Series Noise Figure Analyzers Service Guide
Functional Tests
Scale Fidelity
Scale Fidelity
Test Limits
The scale fidelity error will be ≤ ±1.0 dB with ≤ -10 dBm at the mixer.
This test checks the scale fidelity of the instrument by maintaining a constant
reference level and measuring signals of different amplitudes over most of the
display range. This test sets the input attenuator to 10 dB and the Reference
Level to 0 dBm. The external attenuator is set to 0 dB, and the amplitude of the
source is adjusted to set the displayed signal at the reference level.
The instrument’s internal marker is used to measure the reference amplitude.
The Marker Delta function is activated and the RF input is reduced using the
external precision step attenuator. Signal input levels from 0 dBm to -50 dBm
are measured.
Item
Critical Specifications
(for this test)
Recommended
Keysight Model
Adapter,
Type-N (m), to 3.5 mm (f)
a
Frequency: 50 MHz
VSWR: < 1.1:1
1250-1745
Adapter,
3.5 mm (f) to 3.5 mm (f)
a
Frequency: 50 MHz
VSWR: < 1.1:1
83059B
Adapter,
2.4 mm (f) to 3.5 mm (f)
(2 required)
b
Frequency: 50 MHz
VSWR: < 1.1:1
11901B
Attenuator, 10 dB Step Range: 0-50 dB
Frequency: 50 MHz
Accuracy: ±0.25 dB
8495A
Attenuator, 10 dB fixed (2 required) Frequency: 50 MHz
VSWR: < 1.2:1
8493C, Option 010
Cable, 3.5 mm, 1 meter (2 required) Frequency: 50 MHz
VSWR: < 1.4:1
11500E
Cable, BNC 120 cm Frequency: 10 MHz 10503A
Synthesized Sweeper Output Level Accuracy: 0 to –15 dBm: ±1.0 dB at 50 MHz PSG
a. For N8973B, 74B, 75B
b. For N8976B

Keysight N8973B Specifications

General

Brand	Keysight
Model	N8973B
Category	Measuring Instruments
Language	English