Agilent Technologies N4000A Service-Handbuch

Smart Noise Sources

SNS Series

Operating and Service Guide

N4000A, N4001A, and N4002A

Manufacturing Part Number: N4000-90001

March 2001

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

Notice

Information contained in this document is subject to change without

notice. Agilent Technologies makes no warranty of any kind with regard

to this material, including, but not limited to, the implied warranties of

merchantability and fitness for a particular purpose. Agilent

Technologies shall not be liable for errors contained herein or for

incidental or consequential damages in connection with the furnishings,

performance, or use of this material. No part of this document may be

photocopied, reproduced, or translated to another language without the

prior written consent of Agilent Technologies.

Certification

Agilent Technologies certifies that this product met its published

specifications at the time of shipment from the factory. Agilent

Technologies further certifies that its calibration measurements are

traceable to the United States National Institute of Standards and

Technology, to the extent allowed by the Institute’s calibration facility,

and to the calibration facilities of other International Standards

Organization members.

Warranty

This Agilent Technologies instrument product is warranted against

defects in material and workmanship for a period of one year from date

of shipment. During the warranty period, Agilent Technologies will at its

option, either repair or replace products which prove to be defective. For

warranty service or repair, this product must be returned to a service

facility designated by Agilent Technologies. Buyer shall prepay shipping

charges to Agilent Technologies and Agilent Technologies shall pay

shipping charges, duties, and taxes for products returned to Agilent

Technologies from another country. Agilent Technologies warrants that

iii

its software and firmware designated by Agilent Technologies for use

with an instrument will execute its programming instructions when

properly installed on that instrument. Agilent Technologies does not

warrant that the operation of the instrument, or firmware will be

uninterrupted or error free.

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from

improper or inadequate maintenance by Buyer, Buyer-supplied software

or interfacing, unauthorized modification or misuse, operation outside of

the environmental specifications for the product, or improper site

preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. AGILENT

TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE.

Exclusive Remedies

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND

EXCLUSIVE REMEDIES. AGILENT TECHNOLOGIES SHALL NOT

BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL,

OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON

CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

Safety Notices

This guide uses warnings and cautions to denote hazards.

WARNING Warning denotes a hazard. It calls attention to a procedure

which, if not correctly performed or adhered to, could result in

injury or loss of life. Do not proceed beyond a warning note until

the indicated conditions are fully understood and met.

CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not

correctly performed or adhered to, could result in damage to or

destruction of the instrument. Do not proceed beyond a caution sign until

the indicated conditions are fully understood and met.

NOTE Note calls out special information for the user’s attention. It provides

operational information or additional instructions of which the user

should be aware.

Safety Symbols

The following symbols on the instrument and in the manual indicate

precautions which must be taken to maintain safe operation of the

instrument.

Table 1 Safety Symbols

The Instruction Documentation Symbol. The product is

marked with this symbol when it is necessary for the

user to refer to the instructions in the supplied

documentation.

This symbol indicates that a device, or part of a device,

may be susceptible to electrostatic discharges (ESD)

which can result in damage to the product. Observe

ESD precautions given on the product, or its user

documentation, when handling equipment bearing this

mark.

Electromagnetic Compatibility

This product conforms with the protection requirements of European

Council Directive 89/336/EEC for Electromagnetic Compatibility (EMC).

The conformity assessment requirements have been met using the

technical Construction file route to compliance, using EMC test

specifications EN 55011:1991 (Group 1, Class A) and EN 50082-1:1992.

In order to preserve the EMC performance of the product, any cable

which becomes worn or damaged must be replaced with the same type

and specification. See the Declaration of Conformity on page vi.

Radio-Frequency Electromagnetic Field

Immunity

When a 3 Vm-1 radio-frequency electromagnetic field is applied to the

Smart Noise Source according to IEC 61000-4-3:1995, degradation of

performance may be observed. When the frequency of the incident field

falls within the bandwidth of a measured noise figure or gain, the values

displayed will deviate from those expected. This phenomenon will only

affect that specific frequency, and the SNS will continue to perform to

specification at all other frequency sample points.

The NFA may be unable to calibrate a chosen frequency sample point, if

the frequency matches that of an incident electromagnetic field.

Declaration of Conformity

Contents

vii

1. General Information

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Specifications - Table 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Excess Noise Ratio Expanded Uncertainty (U(Y)) - Table 1-2 . . . . . .6

Supplemental Characteristics - Table 1-3 . . . . . . . . . . . . . . . . . . . . . .8

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Equipment Supplied with the NFA. . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Equipment Available But Not Supplied . . . . . . . . . . . . . . . . . . . . . . . .10

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Recommended Test Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Handling Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Returning an SNS to Agilent for Repair. . . . . . . . . . . . . . . . . . . . . . . .12

Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Connectors That Can Be Mated With the Noise Sources . . . . . . . . .12

Storage and Shipping Environment . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Operating Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Operator’s Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Operator’s Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Operator’s Check for Data Communication. . . . . . . . . . . . . . . . . . . .15

Operator’s Check for Tcold Communication . . . . . . . . . . . . . . . . . . .18

Operator’s Check for Switching Noise Source Off and On . . . . . . . .21

Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

viii

Contents

Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Replaceable Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Chassis Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Principles of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Repair of Defective Noise Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Disassembly Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Reassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Returning a Noise Source for Calibration . . . . . . . . . . . . . . . . . . . . . . 31

Agilent Technologies Sales and Service Offices . . . . . . . . . . . . . . . . 32

2. ENR File Format

Format Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Comment Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Header Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

ENR Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Viewing the Smart Noise Source ENR Data. . . . . . . . . . . . . . . . . . . . . . 39

Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

A. Caring for Connectors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Connector Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Handling and Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Obvious Defects and Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Mating Plane Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Precision 7 mm Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Contents

Sexed Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Compressed Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Cleaning Alcohol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Precision 7 mm Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Cleaning Interior Surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Drying Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Mechanical Inspection: Connector Gages. . . . . . . . . . . . . . . . . . . . . . . . .53

Mechanical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Precision 7mm Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Sexed Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

50 Ohm Type-N Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

75 Ohm Type-N Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Using Connector Gages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Inspecting and Cleaning the Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Zeroing the Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Measuring Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Making Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Align Connectors Carefully . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

To Make a Preliminary Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Final Connection Using a Torque Wrench . . . . . . . . . . . . . . . . . . . . . .62

Disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Adapters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Principles of Microwave Connector Care . . . . . . . . . . . . . . . . . . . . . . . . .67

Contents

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