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Keysight N9038A Measurement Guide
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46
Measuring a Low
−
Level Signal
Red
ucing Input Attenuation
CAUTION
When you finish this example, increase th
e attenuation to protect the analyzer RF
input:
Press
AMPTD Y Scale
,
Attenuation
,
Mech Atten
or
Atten
(Auto), or press
Auto Couple
.
Figur
e 3-2
Measuring a
Low-Level
Signal Using 0 dB Attenuation
Step
Action
Notes
45
47
Table of Contents
Default Chapter
5
Table of Contents
5
Getting Started with the Spectrum Analyzer Measurement Application
12
Making a Basic Measurement
12
Using the Front Panel
12
Presetting the Signal Analyzer
13
Viewing a Signal
14
Recommended Test Equipment
17
Accessories Available
18
50 Ohm Load
18
50 Ohm/75 Ohm Minimum Loss Pad
18
75 Ohm Matching Transformer
18
AC Probe
18
AC Probe (Low Frequency)
19
Broadband Preamplifiers and Power Amplifiers
19
GPIB Cable
19
USB/GPIB Cable
19
RF and Transient Limiters
19
Power Splitters
20
Static Safety Accessories
20
Measuring Multiple Signals
21
Comparing Signals on the same Screen Using Marker Delta
22
Comparing Signals Not on the same Screen Using Marker Delta
25
Resolving Signals of Equal Amplitude
28
Resolving Small Signals Hidden by Large Signals
33
Decreasing the Frequency Span Around the Signal
37
Easily Measure Varying Levels of Modulated Power Compared to a Reference
39
Measuring a Low−Level Signal
43
Reducing Input Attenuation
44
Decreasing the Resolution Bandwidth
47
Using the Average Detector and Increased Sweep Time
50
Trace Averaging
52
Improving Frequency Resolution and Accuracy
55
Using a Frequency Counter to Improve Frequency Resolution and Accuracy
56
Tracking Drifting Signals
57
Measuring a Source Frequency Drift
58
Tracking a Signal
61
Making Distortion Measurements
63
Identifying Analyzer Generated Distortion
64
Third-Order Intermodulation Distortion
67
Measuring Noise
71
Measuring Signal-To-Noise
72
Measuring Noise Using the Noise Marker
74
Measuring Noise-Like Signals Using Band/Interval Density Markers
78
Measuring Noise-Like Signals Using the Channel Power Measurement
81
Measuring Signal-To-Noise of a Modulated Carrier
83
Improving Phase Noise Measurements by Subtracting Signal Analyzer Noise
88
Making Time-Gated Measurements
93
Generating a Pulsed-RF FM Signal
94
Signal Source Setup
94
Analyzer Setup
95
Digitizing Oscilloscope Setup
97
Connecting the Instruments to Make Time-Gated Measurements
99
Gated lo Measurement
100
Gated Video Measurement
104
Gated FFT Measurement
108
Measuring Digital Communications Signals
111
Channel Power Measurements
112
Occupied Bandwidth Measurements
114
Troubleshooting Hints
115
Making Adjacent Channel Power (ACP) Measurements
116
Making Statistical Power Measurements (CCDF)
121
Making Burst Power Measurements
126
Spurious Emissions Measurements
132
Troubleshooting Hints
134
Spectrum Emission Mask Measurements
135
Troubleshooting Hints
136
10 Demodulating am Signals
139
Measuring the Modulation Rate of an am Signal
140
Measuring the Modulation Index of an am Signal
144
11 IQ Analyzer Measurement
147
Capturing Wideband Signals for Further Analysis
148
Complex Spectrum Measurement
149
IQ Waveform (Time Domain) Measurement
151
12 Using Option BBA Baseband I/Q Inputs
155
Baseband I/Q Measurements Available for X-Series Signal Analyzers
156
Baseband I/Q Measurement Overview
157
13 Option EXM External Mixing
159
Using Option EXM with the Keysight 11970 Series Mixers
160
Amplitude Calibration
161
Loading Conversion Loss Data for the PXA Signal Analyzer
161
Signal ID
166
Image Shift
166
Using the M1970 Series Mixers with X-Series Signal Analyzers
168
Exm)
168
Operating Precautions
168
Equipment Set up
169
Operation
171
Amplitude Calibration
172
LO Adjustment
172
Viewing the External Mixer Setup Screen
173
14 Option Esc External Source Control
175
Using Option ESC with the Keysight MXG Signal Sources
176
Lan
177
Loading Conversion Loss Data for the PXA Signal Analyzer
177
Signal ID
182
Image Shift
182
Using the M1970 Series Mixers with X-Series Signal Analyzers
184
Exm)
184
Operating Precautions
184
Equipment Set up
185
Operation
187
Amplitude Calibration
188
LO Adjustment
188
Viewing the External Mixer Setup Screen
189
15 Concepts
191
Resolving Closely Spaced Signals
192
Resolving Signals of Equal Amplitude
192
Resolving Small Signals Hidden by Large Signals
192
Trigger Concepts
194
Selecting a Trigger
194
Time Gating Concepts
197
Introduction: Using Time Gating on a Simplified Digital Radio Signal
197
How Time Gating Works
199
Measuring a Complex/Unknown Signal
205
Quick Rules" for Making Time-Gated Measurements
210
Using the Edge Mode or Level Mode for Triggering
213
Noise Measurements Using Time Gating
214
AM and FM Demodulation Concepts
215
Demodulating an am Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain)
215
Demodulating an FM Signal Using the Analyzer as a Fixed Tuned Receiver (Time-Domain)
215
IQ Analysis Concepts
216
Purpose
216
Complex Spectrum Measurement
216
IQ Waveform Measurement
217
Spurious Emissions Measurement Concepts
218
Purpose
218
Measurement Method
218
Spectrum Emission Mask Measurement Concepts
219
Purpose
219
Measurement Method
219
Occupied Bandwidth Measurement Concepts
220
Purpose
220
Measurement Method
220
Baseband I/Q Inputs (Option BBA) Measurement Concepts
221
What Are Baseband I/Q Inputs
221
What Are Baseband I/Q Signals
221
Why Make Measurements at Baseband
222
Selecting Input Probes for Baseband Measurements
223
Baseband I/Q Measurement Views
224
Other manuals for Keysight N9038A
Manual
52 pages
Service Guide
745 pages
Installation Note
10 pages
Demo Guide
30 pages
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Keysight N9038A Specifications
General
Brand
Keysight
Model
N9038A
Category
Measuring Instruments
Language
English
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