HP 85052c Manuel utilisateur

User’s Guide

HP 85052C Precision Calibration Kit

HEWLETT

PACKARD

TRAINING

VIDEOTAPE USER’SPRODUCT NOTE PRODUCT NOTE CONNECTOR SERVICE

GUIDE

a510-5A

851 O-8A CARE CARD MANUAL

Using theHP

85052C

85052c

Operating and

Precision Service Manual

Calibration Kit

85052C

Precision Calibration Kit Operating and Service Package

TABLE OFCONTENTS

Chapter

Introduction to the Calibration Kit

Calibration Kit Components

Air Lines

O-2

GHz

Loads

Reflect Standards

Isolation Standards

Precision Adapters

Tools

Chapter 2

Performing a TRL 2-Port Measurement Calibration

Electrostatic Discharge

Clean and Inspect

Cleaning

Using Connector Gages

Configure Port 1 and Port 2

Install Test Port Return Cables

Install Precision Adapters

Air Line Frequency Coverage

Load Calibration Kit Definition

Measure Standards

When Stop Frequency is Greater than 7

GHz

When Start Frequency is Less than 7

GHz

When Start Frequency is Less than 2

GHz

Check the Calibration

Chapter 3

Noninsertable Calibrations

General Theory

Noninsertable Device Configurations

Adapter Removal Calibration Procedure

Chapter 4

Other Calibrations

Changing Air Line Frequency Range

Lowband

Reflection Instead of

0 to 2 Loads or 2 to 7 Line

Lowband

Reflection Procedure

0 N

What’s in this Guide

Th*

guide describes how to use the HP 85052C calibration

Chapter 1

Chapter 2

Chapter 3

Chapter 4

User’s Video

Application Note

Service Manual

Before Proceeding.

kit

with

the HP 8510 vector network analyzer to perform

the TRL 2-Port measurement calibration technique, and

how to evaluate the results of the calibration.

This chapter introduces the components of the kit, and

describes important connection techniques.

In this chapter, detailed sequences describe how to set up

the network analyzer system, and use the kit to perform

the 3.5 mm TRL

~-POX?

Calibration procedure.

Since many applications require measurement of devices

that are not insertable, this chapter describes the theory of

and how to use the kit to perform the Adapter Removal

procedure for measurement of noninsertable devices.

This chapter, entitled “Other Calibrations,” describes use

of the network analyzer Modify Cal Kit function to redefine

the calibration kit and how to use the Lowband Reflection

option.

This guide is supplemented by a video presentation that

shows how an experienced operator uses the calibration kit

parts. If you have access to this tape, view it along with this

manual first.

Another supplement,

Application Note 326, Microwave

Connector Care, gives

general principles of microwave

connector care. With the exception of changing the

recommended connector cleaning fluid from the previously

recommended liquid freon (a CFC) to isopropyl alcohol, this

connector care manual will serve as an excellent starting

point to become familiar with general requirements for

achieving optimum results using this calibration kit.

Refer to the Service Manual for specifications, replaceable

parts, and other pertinent information. Inside the

calibration kit box a quick reference card illustrates

procedures for connecting and disconnecting the air line.

This memory aid is helpful to the operator who is familiar

with the kit and TRL 2-Port calibration theory.

The parts in this kit are delicate and must be handled with

care to avoid damage that would affect the accuracy of the

calibration. Check all test device connectors carefully

before connecting to the TRL adapters.

85052C

Precision Calibration Kit

CHAPTER ON

Introduction to the Calibration Kit

The HP 85052C 3.5 mm Precision Calibration Kit is

designed to be used in TRL 2-Port measurement calibra-

tion as implemented in vector network analyzers. TRL

stands for Thru-Reflect-Line, naming the main standards

used in the accuracy enhancement procedure.

TRL represents a family of calibration techniques that

measure various combinations of transmission lines and

reflection standards to determine the 2-Port 12-term error

coefficients. The specific calibration technique described

here uses measurements of the zero-length thru connec-

tion, identical reflection standards at each port, and one or

more transmission lines of appropriate impedance and

length for the frequency range. Both the TRL 2-PORT and

the Full 2-Port calibration types use the same accuracy

enhancement mathematics to correct the measured data.

TRL, as implemented with this calibration kit, brings con-

venience, accuracy, and repeatability to the error

correction process because the typical TRL calibration

requires fewer parts that are simpler to connect and

disconnect.

The 3.5 mm geometry connector is the most frequently

used connector when frequency coverage up to 26.5

GHz,

reasonable commonality, and durability is desired.

Well constructed connectors and transmission lines can

work up to 34

GHz.

Metrology grade versions of this con-

nector are used for high performance test ports and for

calibration standards. Whether the device uses SMA,

SMA-compatible, or 3.5 mm, the HP 3.5 mm connectors

used on the HP test ports, adapters, cables, and calibration

standards provide the most accurate and repeatable

solution.

All male connectors in this kit are HP precision with care-

fully controlled dimensions. All female connectors are of

the HP precision slotless (PSC-3.5) type. These connectors

are designed for long repeatability when used with appro-

priate technique. This means careful inspection of the kit

parts, familiarity with their use, and careful inspection of

the Device Under Test (DUT) connectors. Refer to the

“Specifications” chapter in the HP

85052C

Service Man-

ual, and the Technical Note included with this manual for

specific information about precision slotless connectors.

Calibration

Kit Components

Air Lines

The HP

85052C

3.5 mm Precision Calibration Kit contains

components useful for several different calibration tech-

niques. The parts used for the TRL 2-Port calibration are:

Longer precision air line for 2 to 7 GHz

Shorter precision air line for 7 to 32 GHz

Male and female short circuits

Male and female fixed loads

Other parts included are:

Three precision TRL adapters

. Two adapter anti-rotation clamps

Calibration kit definition tape

Male and female open circuits

Tools

Note the reference card in the box and the material list on

the bottom of the box.

These are precision air lines. Each one is always stored in

its installation tool to help prevent damage and preserve

cleanliness.

The shorter air line is used for measurement calibration

over the 7 to 32 GHz frequency range. The longer air line is

used for measurement calibration over the 2 to 7

GHz

range. Each air line is fully specified at all frequencies

within its stated range.

7-32

LINE

a’

2-7 LINE

Line Standards

7 to 32

GHz

and 2 to 7

GHz

Air

Lines Installed in Tools with Storage Bottles

Polar Display Showing Phase Response

Longer

Air Line Over 2

GHz

Frequency Range Polar Display Showing Phase Response of Shorter

Air Line over 7 to 26.5

GHz

Frequency Range

Air Lines Removed From

installation

Tools

Each air line consists of a separate outer conductor and

center conductor and includes its own tool used for

installing and removing the parts from the test port. Both

are insertable. Each has a male end and a female end. The

male end of the air line fits into the installation tool.

The parts may be removed for inspection, if necessary, but

the tool is always used to install the parts for calibration.

Use extreme care in handling these parts. Use static dissi-

pative finger sheaths, or “finger cots” to prevent contami-

nation. Liquid or solid residue on the connector parts will

degrade performance. In particular, the inner conductors

can be easily deformed by squeezing. Do not use

metallic

tweezers or other devices to pick up or hold the parts.

installing

the

Air

Lines in

installation

Tools

0 to

GHz

Loads

Th’

implementation of the TRL 2-Port calibration allows

measurement of the loads to determine the error coeffi-

cients up to 2

GHz.

Technically, the measurement is

treated as an infinite-length transmission line whose input

reflection is the reference impedance, Z,.

Note:

The male and female broadband loads are

manufactured to tolerances that assure equivalent responses,

at least below 2

GHz.

If one is damaged or otherwise

becomes defective, calibration

erroriwill

result.

to 2

GHz

Loads -Male and Female Fixed Broadband Loads

Reflect Standards

Reflect Standards -Male and Female Short Circuits

Isolation Standards

isolation

Standards -Male and Female Broadband Loads

Precision Adapters

In this TRL 2-Port calibration, the reflect standards are

identical short circuits with one connected to Port 1 and

one to Port 2.

The male short circuit and the female short circuit are

manufactured to tolerances that assure equivalent

responses. If one is damaged or otherwise becomes

defective, calibration errors will result. Errors will also

result if the open circuits are used in the procedure instead

of the short circuits (unless the calibration kit standard

assignment definition is changed).

The fixed loads used for the isolation part of the calibration

are the same broadband loads as used for the O-2 loads

measurement. Exact equivalent responses are not required

for this step.

Three precision adapters are included in this kit. Two are

always recommended for the 3.5 mm TRL 2-Port

measurement calibration. All three can be used in the

adapter removal calibration for measurement of nonin-

sertable devices. Complete performance verification

assumes use of the precision adapters in this kit as the test

ports.

MALE to FEMALE MALE to MALE FEMALE to FEMALE

Precision

TRL

test port adapters

Recession Limits

The female receptacle recession and the male pin

recession, along with other mechanical specifications of

Port 1 and Port 2, must be within limits to meet complete

measurement specifications. The precision adapters

supplied in this kit are manufactured to metrology

standards in order to obtain the best measurement

accuracy specifications. If other connectors than these

precision adapters are used as the test ports, they must be

fully inspected. Using other than the highest quality

connectors as the test ports will reduce accuracy and

repeatability as well as possibly damaging the calibration

standards.

Precision Connectors

For general use, any 3.5 mm precision

slotless

female con-

nector can be used for the female test port. The 3.5 mm

precision male connector used on the male end of these

adapters is always required for measurements between

7-32 GHz in order to connect the 7-32 GHz air line in this

kit. Any 3.5 mm precision male connector can be used at

frequencies less than 7

GHz.

hstdation

Feature

The precision adapter male connector has a special feature

to allow installation of the 7-32 air line.

GAP

Grasp the knurled sleeve and move the nut to its

extended position by pulling on it.

This is the position used for measurement of the 7-32 GHz

air line.

Extended Position

GAP

.Now move the sleeve forward and push the nut back

into its standard position.

This position is used to install the short air line, for

connecting the other calibration standards, and for

connecting the device under test.

Standard Position

Torque Wrench

Tools

At q

ue wrench and spanner wrench are included in the

kit to loosen and tighten the connectors. The small torque

wrench is used for the 3.5 mm nuts. The large torque

wrench is used for the 20 mm nuts on the precision

adapters. It is included with the test set. The spanner

wrench is used to hold the precision adapter while using

the appropriate torque wrench to tighten the connection.

Also included is the hex wrench for tightening and

loosening the adapter anti-rotation clamp securing screws.

Spanner Wrench

When making connections, turn the nut on the device,

never turn the device itself. Turning the device will cause

excessive wear of both connector mating surfaces and

cause debris to collect in the female receptacle.

Torque Wrench (not included)

When making a connection:

Hex Wrench

for

AdapterAnti-Rotation Clamp

Carefully engage the male and female contacts, and

then tighten the nut by hand.

If necessary, use the spanner to hold one device

stationary against the direction of torque.

Hold the torque wrench with your thumb and index

finger near the end of the handle.

Tighten the connection until the ball in the handle

crests on the cam (as the handle begins to “break”,

releasing tension).

TIGHTEN WITH

TORQUE WRENCH

HOLD WITH

SPANNER WRENCH

It is not recommended or necessary to fully “break” the

handle of the torque wrench to reach the fully-specified

torque. As soon as the handle moves out of alignment, the

connection is properly torqued.

Reverse the above procedure to disconnect the connectors.

HANDLE BEGINS TO BREAK

(

CORRECT

POINT

TO STOP

)

HANDLE FULLY BROKEN

TORQUING

(NOT RECOMMENDED) DIRECTION

Using the Spanner and Torque Wrench Correct Torque Value

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