Agilent Technologies u8903a User Manual

144 U8903A User’s Guide
Appendixes

Appendix C: User-defined Filter File Format
Pressing Custom in either the low pass, high pass, or
weighting filters section enables you to upload a
user- defined filter file via the File Manager.
The available user- defined filter types are Infinite Impulse
Response (IIR) and Finite Impulse Response (FIR). You need
to specify the coefficients or sections as well as group delay
for the respective filter type. Use the following examples to
configure the filter file format. The file is saved in the *.juf
format.
Example of the FIR filter file format:
#Type: FIR
#Delay: 10
#Coefficients: [0.001, 0.002, 0.003, 0.004, 0.005]
The coefficients of the FIR filter are described as follows.
0.001 //A[0]
0.002 //A[1]
0.003 //A[2]
0.004 //A[3]
0.005 //A[4]
NOTE
The FIR filter transfer function, H(z), is defined as:
H(z) = A[0] + A[1]z
–1
+ A[2]z
–2
+ A[3]z
–3
+ ...
where z = complex variable

Agilent Technologies u8903a Specifications

General

Amplitude Accuracy	±0.5 dB
Display	Color LCD
Interfaces	USB, LAN, GPIB
Modulation Types	AM, FM, PM
Power Supply	100 V to 240 V, 50 Hz to 60 Hz

Summary

Getting Started

Introduction

Overview of the U8903A audio analyzer, its capabilities, and connectivity.

Product at a Glance

Visual overview of the U8903A's front and rear panels and their components.

Installation and Configuration

Steps for initial inspection, ventilation requirements, and rack mounting procedures.

Operation and Features

Test Capabilities

Describes the range of audio-related devices and components the U8903A can test.

Key Features

Highlights crucial features like remote interface, sweep function, and frequency domain analysis.

Front Panel Operation

Explains the organization and function of front panel keys like Mode, Graph, and System.

Instrument Configuration

U8903A Block Diagram

A simplified block diagram illustrating the U8903A's input, DSP, and output signal paths.

Input Settings

Configuration options for analyzer inputs: AC/DC coupling, detector, filters, connections, and ranges.

Common Settings

Settings applicable to analyzer functions, including bandwidth, measurement time, and trigger modes.

Audio Generator Functions

Audio Generator

Accessing the generator settings and overview of available waveform functions.

Sine waveform

Configuration parameters for sine waveforms: frequency, amplitude, and DC offset.

Dual sine waveform

Generating composite waveforms for IMD testing.

Audio Analyzer Measurement Functions

Audio Analyzer

Accessing analyzer mode and configuring measurement functions per channel.

Measurement Functions

Describes core measurements like Frequency, AC/DC voltage, THD+N, SINAD, SNR.

THD + N Ratio and THD + N Level

Measures harmonic distortion and noise relative to signal amplitude.

Frequency and Time Domain Analysis

Frequency Domain and Time Domain

Displays signals in 2D graphs; settings for monitor, input, and axis configurations.

Input settings

Configure channel, bandwidth, input connection, range, and trigger source/edge.

Graph Functions

Tools for graph analysis: peak search, marker placement, and full-screen view.

Sweep Function

Sweep

Performing sweeps to display results in graph or list form; varying generator parameters.

Sweep settings

Configure sweep parameters like start/stop points, amplitude, and measurement functions.

List view

Display sweep results in a list format, allowing editing or deleting points.

Specifications

Characteristics

General specs like power, environment, safety compliance, dimensions, weight, and warranty.

Audio generator

Detailed specs for generated waveforms, output ranges, accuracy, and flatness.

Audio analyzer

Specs for analyzer inputs, measurement ranges, flatness, THD+N, CMRR, and crosstalk.

Appendixes

Appendix A: SMPTE IMD and DFD Default Settings

Default parameter values for SMPTE IMD and DFD waveforms.

Appendix B: Arbitrary File Format

Format and examples for creating user-defined arbitrary waveform files.

Appendix C: User-defined Filter File Format

Format for creating custom FIR and IIR digital filters.