Keysight Technologies X Series Manuale utente

Functional

Tests

Keysight X-Series Signal Analyzers

This manual provides documentation for the following

Analyzers:

PXA Signal Analyzer N9030A

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2006-2015

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Manual Part Number

N9030-90018

Print Date

January 2015

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Keysight Technologies

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Contents

Table of Contents

1. Functional Tests

Functional Test Versus Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Contents of this Document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Before Performing a Functional Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. Displayed Average Noise Level (DANL)

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3. Frequency Readout Accuracy

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4. Second Harmonic Distortion (SHD)

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5. Amplitude Accuracy at 50 MHz

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Testing Preamp Option (P03, P08, P13, P26, P43, P44, P50) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6. Frequency Response (Flatness)

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7. Frequency Response (Flatness), Preamp On

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

8. Scale Fidelity

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9. BBIQ Input Frequency Response

(Option BBA only)

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Contents

Keysight X-Series Signal Analyzers

PXA N9030A

Functional Tests

1 Functional Tests

Functional tests are tests of various instrument parameters that give a high

degree of confidence that the analyzer is operating correctly. They are

recommended as a check of analyzer operation for incoming inspection or after

a repair. Measurement uncertainty analysis is not available for functional tests,

and the analyzer is checked against limits that are wider than the published

specifications. The functional tests are designed to test an analyzer operating

within the temperature range defined by the analyzer specifications using a

minimum set of test equipment. If a test does not pass, performance

verification tests must be run to determine whether a problem exists.

4 Chapter 1

Functional Tests

Functional Test Versus Performance Verification

Functional tests use a minimum set of test equipment to check a much smaller

range of parameters (and a limited number of data points for each parameter)

than do performance verification tests. Functional tests use limits that are

wider than the published specifications; measurement uncertainty analysis is

not available for functional tests.

NOTE If a functional test does not pass, you must run performance verification tests

to determine whether a problem exists.

Performance verification tests span a wide range of instrument parameters and

provide the highest level of confidence that the instrument conforms to

published specifications. These tests can be time consuming and require

extensive test equipment.

Chapter 1 5

Functional Tests

Contents of this Document

This chapter includes the following:

—“Before Performing a Functional Test” on page 6 (what to do first).

—“Test Equipment” on page 7 (a list of the equipment required for all of the

tests).

Subsequent chapters describe the following Functional Tests:

—“Displayed Average Noise Level (DANL)” on page 11

—“Frequency Readout Accuracy” on page 15

—“Second Harmonic Distortion (SHD)” on page 19

—“Amplitude Accuracy at 50 MHz” on page 23

—“Frequency Response (Flatness)” on page 29

—“Frequency Response (Flatness), Preamp On” on page 35

—“Scale Fidelity” on page 41

Each functional test includes:

— Test limits (pass/fail criteria)

— A description of the test

— The equipment required for the test

— A figure showing how to connect the equipment

— Step-by-step instructions

— One or more tables in which to record the measurement results

6 Chapter 1

Functional Tests

Before Performing a Functional Test

1. Ensure that you have the proper test equipment.

2. Switch on the unit under test (UUT) and let it warm up (in accordance with

warm-up requirements in the instrument specifications).

3. Allow sufficient warm-up time for the required test equipment (refer to

individual instrument documentation for warm-up specifications).

4. Ensure that the analyzer’s frequency reference is set to Internal:

a. Press the Input/Output, More, Freq Ref In keys.

b. If the Freq Ref In softkey does not show Internal, press the Freq Ref

In softkey and select Internal.

5. Following instrument warm-up, perform the auto align routine:

Press System, Alignments, Align Now, All.

NOTE Functional test accuracy depends on the precision of the test equipment

used. Ensure that all of the test equipment is calibrated before running a

functional test.

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