Pickering 41-180 Manual de usuario

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3GHz PROGRAMMABLE STEP ATTENUATOR 41-180

pickering

Issue 4.1 May 2017

User Manual

3GHz Programmable Step Attenuator Module

(Model No. 41-180)

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Page (II) REED RELAY MODULE 40-110/115/120/125

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No part of this publication may be reproduced, transmitted, transcribed, translated or stored in any form, or by

any means without the written permission of Pickering Interfaces.

Technical details contained within this publication are subject to change without notice.

ISO 9001

Reg No. FM38792

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3GHz PROGRAMMABLE STEP ATTENUATOR 41-180

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Page (III)

REED RELAY MODULE 40-110/115/120/125

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TECHNICAL SUPPORT

For Technical Support please contact Pickering Interfaces either by phone, the website or via e-mail.

WARRANTY

All products manufactured by Pickering Interfaces are warranted against defective materials and workmanship for a period of

three years, excluding programmable power supplies, from the date of delivery to the original purchaser. Any product found to be

defective within this period will, at the discretion of Pickering Interfaces be repaired or replaced.

Products serviced and repaired outside of the warranty period are warranted for ninety days.

Extended warranty and service are available. Please contact Pickering Interfaces by phone, the website or via e-mail.

ENVIRONMENTAL POLICY

Pickering Interfaces operates under an environmental management system similar to ISO 14001.

Pickering Interfaces strives to full all relevant environmental laws and regulations and reduce wastes and releases to the

environment. Pickering Interfaces aims to design and operate products in a way that protects the environment and the health and

safety of its employees, customers and the public. Pickering Interfaces endeavours to develop and manufacture products that can

be produced, distributed, used and recycled, or disposed of, in a safe and environmentally friendly manner.

Worldwide Technical Support and Product Information

pickeringtest.com

Germany

Tel: +49 89 125 953 160

E-mail: [email protected]

Sweden

Tel: +46 340-69 06 69

E-mail: [email protected]

USA

Tel: (West) +1 541 471 0700

Tel: (East) +1 781 897 1710

E-mail: [email protected]

Czech Republic

Tel: +420 558 987 613

E-mail: [email protected]

France

Tel +33 9 72 58 77 00

E-mail [email protected]

Pickering Interfaces Headquarters

Stephenson Road Clacton-on-Sea CO15 4NL United Kingdom

Tel: +44 (0)1255-687900

E-Mail: [email protected]

China

Tel: +86 4008 799 765

E-mail: [email protected]

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MEANING / DESCRIPTION SYMBOL

PROTECTIVE EARTH (GROUND)

To identify any terminal which is intended for connection to an external conductor for

protection against electric shock in case of a fault, or the terminal of a protective earth

(ground) electrode.

DANGEROUS VOLTAGE

To indicate hazards arising from dangerous voltages.

WARNING / CAUTION

An appropriate safety instruction should be followed or caution to a potential hazard

exists.

Refer to the relevant instructions detailed within the product manual.

HEAVY

If this product is heavy reference should be made to the safety instructions for

provisions of lifting and moving.

STATIC SENSITIVE

To indicate that static sensitive devices are present and handling precautions should

be followed.

SAFETY SYMBOLS

PRODUCT SAFETY

The following safety symbols may be used on the product and throughout the product documentation.

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Technical Support and Warranty................................................III

Product Safety .............................................................................IV

Contents (this page)....................................................................V

Warnings and Cautions ..............................................................VII

Section 1

Technical Specication...............................................................1.1

Section 2

Technical Description .................................................................2.1

Functional Description..........................................................2.1

Cascading Attenuators .........................................................2.2

Section 3

Installation....................................................................................3.1

Pre Operation Checks...........................................................3.1

Hardware Installation ............................................................3.2

Software Installation .............................................................3.2

Section 4

Programming Guide....................................................................4.1

Programming Options For Pickering PXI Cards.................4.1

Programming The Module ....................................................4.3

Using Pickering Drivers in LabVIEW ...................................4.4

Programmable Attenuator Soft Front Panel .......................4.5

Section 5

Connector Information................................................................5.1

Section 6

Trouble Shooting.........................................................................6.1

Section 7

Maintenance Information............................................................7.1

Calibration..............................................................................7.2

CONTENTS

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WARNINGS AND CAUTIONS

WARNING - HAZARDOUS ENVIRONMENTS SYMBOL

This product is not specically designed for use in hazardous environments, for example in explosive

atmospheres. If the product is to be used in hazardous environments we recommend that the user

ensures suitable protective measures are taken.

WARNING - DANGER OF ELECTRIC SHOCK SYMBOL

This module may contain hazardous voltages. Before removing the module from the rack remove all

supplies and disconnect user I/O signals.

Unused slots in the PXI/LXI chassis are populated with blanking plates to prevent access to user

I/O signals that may be present. Blanking panels are available to order from Pickering in a variety

of slot widths. If the product is not used in this manner for example by using an extender card then

additional care must be taken to avoid contact with exposed signals.

CAUTION - HANDLING OF ELECTROSTATIC-SENSITIVE DEVICES SYMBOL

Certain semiconductor devices used in this equipment are liable to damage due to static voltage.

Observe the following precautions when handling these devices in their unterminated state, or

sub-assemblies containing these devices:

1. Persons removing sub-assemblies from equipment using these devices must be earthed by a

wrist strap and a resistor at the point provided on the equipment.

2. Soldering irons used during the repair operations must be low voltage types with earthed tips and

isolated from the mains voltage by a double insulated transformer.

3. Outer clothing worn must be unable to generate static charges.

4. Printed Circuit Boards (PCBs) tted with these devices must be stored and transported in

anti-static bags.

CAUTION - PRODUCT DOCUMENTATION SYMBOL

Suitably qualied & trained users should ensure that the accompanying documentation is fully read

and understood before attempting to install or operate the product.

SAFETY INSTRUCTIONS

All cleaning and servicing requires the equipment to be isolated and disconnected from the power source and user I/O

signals (refer to the Maintenance Section).

• Appropriate manual handling procedures should be followed as dictated by the weight of the individual module or

the combined weight of the modules & chassis.

• Should a fault occur with the module or chassis, immediately isolate and disconnect the incoming power to the

chassis and the user I/O signals.

• Ensure the equipment is installed, operated and maintained by trained and authorised personnel.

• For suitably equipped products in the event of an emergency press the red “emergency stop” button situated on

the front of the unit.

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Page 1.1

3GHz PROGRAMMABLE STEP ATTENUATOR 41-180

pickering SECTION 1 - TECHNICAL SPECIFICATION

SECTION 1 - TECHNICAL SPECIFICATION

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41-180

DC to 3GHz Programmable Attenuator

●DC to 3GHz Attenuator

●1dB Attenuation Resolution Ideal for

Optimizing Signal Levels in Measuring Systems

●Maximum Attenuation 63dB

●Single or Dual Version in One PXI Slot

●Use of Switched Resistive Attenuator Pads

Ensures High Linearity and True DC Coupled

Operation

●Input and Output Connector Savers Easily

Replaced if Damaged

●VISA, IVI & Kernel Drivers Supplied for

Windows

●3 Year Warranty

The 41-180 Programmable Attenuator Module is ideal for

conditioning the output level of special to type sources, saving

the systems integrator the time and effort of providing a

variable output level. The use of a PXI solution for variable

attenuation requirements minimizes the need for components

and cables located outside the PXI chassis, saving time and

development costs for systems integrators.

The input and output connectors of the attenuators can be

interchanged and the design allows the user to change the

front panel connectors quickly and easily in the event of

damage occurring. The attenuators can be connected in series

to increase the total available attenuation.

The 41-180 Programmable Attenuator Module is available

with either one or two independently programmable

attenuators in a single width 3U PXI module. Each attenuator

uses high reliability mechanical switches to operate binary

weight attenuator pads, providing attenuation values from 0

to 63dB in 1dB steps. Attenuator operating time is typically

just 5ms, ensuring fast setting times.

The module is ideal for conditioning the signal levels from

devices under test and ensuring that other measuring

instruments are operating close to their optimum operating

point for noise and linearity. The use of mechanically switched

attenuators ensures broad operating bandwidth and freedom

from non-linear behavior that might degrade the signals being

measured.

The attenuators can be used for back-to-back testing of RF

products, allowing the signal levels to be adjusted to quantify

the path loss that can be inserted before the communication

efﬁciency degrades, providing a quick indication of receiver

sensitivity.

ISSUE 7.1 MAY 2017

16dB Pad 1dB Pad 2dB Pad

16dB Pad 16dB Pad 8dB Pad

4dB Pad

PORT A

PORT B

ATTENUATOR 1

RL1 RL2 RL3

RL7 RL6 RL5

RL4

16dB Pad 1dB Pad 2dB Pad

16dB Pad 16dB Pad 8dB Pad

4dB Pad

PORT A

PORT B

ATTENUATOR 2

RL8 RL9 RL10

RL14 RL13 RL12

RL11

Dual DC to 3GHz Attenuator Block Diagram

Page 1.2 3GHz PROGRAMMABLE STEP ATTENUATOR 41-180

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SECTION 1 - TECHNICAL SPECIFICATION

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Typical VSWR Versus Frequency With

No Attenuation Set

Typical Insertion Loss Versus Frequency With

No Attenuation Set

Attenuation Accuracy Versus Frequency With

8dB of Attenuation Set

Attenuation Accuracy Versus Frequency With

32dB of Attenuation Set

Attenuation Accuracy Versus Frequency With

48dB of Attenuation Set

Attenuation Accuracy Versus Frequency With

63dB Set

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