Agilent Technologies 89410A User Manual

To create a fixed-length waterfall display
There are several computer programs that let you create arbitrary
waveforms (such as MATLAB or MATRIXx). If the waveform is a long
waveform (it contains more than 4096 complex points or 8192 real points),
you must create a waterfall or spectrogram display on the analyzer, copy
the waterfall or spectrogram data to your computer, and use the Standard
Data Format (SDF) utilities to replace the waterfall or spectrogram data
with the data from your computer program. The waterfall or spectrogram
data must have the same sample frequency, length, and ∆t (time-interval
between points) as your computer-generated waveform.
This procedure shows you how to create a waterfall or spectrogram display
that contains the number of samples and ∆t that you need. See ‘’To
create a long waveform using ASCII data’’ to learn how to perform the
remaining steps.
This procedure configures the analyzer to create a waterfall display for a
complex signal that has a sample frequency of 3.84 MHz and a total source
length of 5ms. Substitute your values where necessary.
1. Initialize the analyzer and select the Vector instrument mode:
Press [
Instrument Mode
], [
receiver
], then press:
89410A: [
input section (0-10 MHz)
].
89441A: [
RF section (0-10 MHz)
].
Press [
Preset
].
Press [
Instrument Mode
], [
Vector
].
2. Set the rbw mode to arbitrary and rbw coupling to auto:
Press [
ResBW/Window
], [rbw mode arb], [rbw coupling auto], [Return].
3. Compute the total number of samples in the waveform:
Total Samples = 3.84
Msamples
sec
× 5 ms = 19,200 samples
4. Divide the total number of samples into N equal-length segments. Note that:
l Each segment must contain an integer number of samples:
l For real signals, each segment must have between 128 and 8192 samples.
l For complex (zoom) signals, each segment must have between 64 and 4096
samples.
For this example, there are several possible solutions, such as:
10 segments of 1920 samples.
12 segments of 1600 samples.
20 segments of 960 samples.
Creating Arbitrary Waveforms
6-12

Agilent Technologies 89410A Specifications

General

Brand	Agilent Technologies
Model	89410A
Category	Measuring Instruments
Language	English

Summary

The Analyzer at a Glance

Front Panel

Details the various controls and connectors on the analyzer's front panel.

Saftey Summary

Safety Symbols

Explains the meaning of various safety symbols used in the manual.

Options and Accessories: Agilent 89410A

Add PC-Style Keyboard and Cable

Lists options for adding a PC-style keyboard and cable with different language versions.

Notation Conventions

In This Book

1 Demodulating an Analog Signal

To perform AM demodulation

Step-by-step guide to performing AM demodulation on a sample signal.

To perform PM demodulation

Step-by-step guide to performing PM demodulation on a sample signal.

To perform FM demodulation

Step-by-step guide to performing FM demodulation on a sample signal.

2 Measuring Phase Noise

To measure phase noise

Procedure for measuring phase noise using simulated input signal from time capture.

3 Characterizing a Transient Signal

To set up transient analysis

Demonstrates methods for characterizing transient signals using arbitrary source signals.

To analyze a transient signal with time gating

Explains how to analyze transient signals using time gating features.

4 Making On/Off Ratio Measurements

To set up time gating

Steps to set up time gating for measuring on/off ratio of a burst signal.

To measure the on/off ratio

Procedure to measure the on/off ratio of a burst signal using time gating.

5 Making Statistical Power Measurements

To display CCDF

Procedure to display the Complementary Cumulative Density Function (CCDF).

To display peak, average, and peak/average statistics

How to display peak, average, and peak-to-average statistical power measurements.

6 Creating Arbitrary Waveforms

To create a waveform using a single, measured trace

Steps to create short arbitrary waveforms from a single measured trace.

To create a waveform using multiple, measured traces

Guide to creating long arbitrary waveforms using multiple measured traces.

To create a short waveform using ASCII data

Procedure for creating short waveforms using ASCII data.

7 Using Waterfall and Spectrogram Displays (Opt. AYB)

To create a test signal

Creates a test signal to demonstrate waterfall and spectrogram features.

To set up and scale a waterfall display

Instructions on how to set up and scale waterfall displays.

To select a trace in a waterfall display

Procedure to select specific traces within a waterfall display.

To set up a spectrogram display

Guide on how to set up and view a spectrogram display.

8 Using Digital Demodulation (Opt. AYA)

To prepare a digital demodulation measurement

Steps to set up a digital demodulation measurement using a NADC signal.

To demodulate a standard-format signal

How to demodulate the NADC signal using standard format parameters.

To set up pulse search

Learn how to perform pulse search on a burst signal.

9 Using Video Demodulation (Opt. AYH)

To prepare a VSB measurement

Procedure to load and view an 8 VSB signal for measurement.

To determine the center frequency for a VSB signal

How to determine the correct center frequency for VSB measurements.

To demodulate a VSB signal

Steps to demodulate a VSB signal using specific parameters.

10 Analyzing Digitally Demodulated Signals (Options AYA and AYH)

To demodulate a non-standard-format signal

Guide to demodulating non-standard signals using digital demodulation.

To use polar markers

How to select polar-marker format and units for analysis.

To view a single constellation state

Steps to reposition a constellation state to the center and zoom in.

11 Creating User-defined Signals (Options AYA and AYH)

To create an ideal digitally modulated signal

Procedure to create an ideal digitally modulated signal using noise and reference signals.

To create a user-defined filter

How to create custom filters for measured or reference signals.

12 Using Adaptive Equalization (Options AYA and AYH)

To determine if your analyzer has Adaptive Equalization

Steps to check if the analyzer has the required options for Adaptive Equalization.

To apply adaptive equalization

Steps to apply adaptive equalization to a demodulated multi-path signal.

13 Using Wideband CDMA (Options B73, B79, and 080)

To view a W-CDMA signal

Steps to view W-CDMA signal in Vector mode to verify settings.

To demodulate a W-CDMA signal

Procedure to demodulate W-CDMA signals, adjusting parameters as needed.

To view data for a single code layer

How to view code-domain power for a single code layer.

14 Using the LAN (Options UTH & UG7)

To determine if you have options UTH and UG7

Steps to check for UTH and UG7 LAN options on the analyzer.

To connect the analyzer to a network

Guide to connecting the analyzer to a network via LAN.

To set the analyzer’s network address

Procedure for setting the analyzer's IP address and subnet mask.

To transfer files via the network

Instructions for transferring files to and from the analyzer via FTP.

15 Using the Agilent 89411A Downconverter

The Agilent 89411A at a Glance

Provides an overview of the Agilent 89411A Downconverter's front panel and block diagram.

Calibration

Steps to calibrate the system by connecting the 89410A and 89411A.

16 Extending Analysis to 26.5 GHz with 20 MHz Information Bandwidth

Overview

Introduces extending analyzer capabilities with the HP/Agilent 71910A wideband receiver.

System Configuration

Outlines the components and software for creating a wideband system.

System Connections

Illustrates system connections for various configurations.

17 Choosing an Instrument Mode

Why Use Scalar Mode?

Explains when to use Scalar Mode for measurements.

Why Use Vector Mode?

Details the benefits and applications of Vector Mode for measurements.

Why Use Analog Demodulation Mode?

Explains the capabilities and applications of Analog Demodulation Mode.

18 What Makes this Analyzer Different?

Time Domain and Frequency Domain Measurements

Explains the fundamental differences between time and frequency domain measurements.

FFT analyzers

Explains the principles and advantages of FFT analyzers.

19 Fundamental Measurement Interactions

Measurement Resolution and Measurement Speed

Details how resolution, speed, and display are interconnected.

Bandwidth coupling

Discusses linking resolution bandwidth and frequency span.

Windowing

Explains time-domain weighting functions and their effects.

20 Analog Demodulation Concepts

Special Considerations for Analog Demodulation

Outlines conditions and constraints for analog demodulation.

Time Correction and Analog Demodulation

Explains the role of time correction in analog demodulation.

The Importance of Span Selection

Details how span selection affects analog demodulation results.

21 Gating Concepts

What is Time Gating?

Explains the availability and purpose of time gating.

How Does it Work?

Details the parameters and process of time gating.

22 Digital Demodulation Concepts (Opt. AYA)

Carrier locking

Discusses achieving reliable carrier lock for QAM signals.

Special considerations for sync search

Explains using synchronization patterns to isolate signal portions.

23 Video Demodulation Concepts (Opt. AYH)

Carrier locking and pilot search: VSB

Details carrier locking and pilot search for VSB signals.

Span considerations

Explains how span affects measurements and carrier lock.

24 Wideband CDMA Concepts (Options B73, B79, and 080)

Setting up a W-CDMA Measurement

Guide to configuring the analyzer for W-CDMA signal demodulation.

Troubleshooting W-CDMA Measurements

Lists common W-CDMA measurement problems and their solutions.