Pickering SYSTEM 10 User manual

Page (1)

LOW NOISE HIGH ISOLATION MULTIPLEXER 20-620-322

pickering

Issue 4.1 July 2019

User Manual

GPIB Low Noise High Isolation

Multiplexer Module

(Model No. 20-620-322)

pickeringtest.com pickering

SYSTEM 10/20

*Please contact Pickering for alternative

PXI/LXI/USB solutions

Page (II) LOW NOISE HIGH ISOLATION MULTIPLEXER 20-620-322

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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

Page (III)

LOW NOISE HIGH ISOLATION MULTIPLEXER 20-620-322

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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

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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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Page (IV) GENERAL PURPOSE REED RELAY MODULE 10-110/115/120/125

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

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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

Section 3

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

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

Hardware Installation ............................................................3.1

Software Installation .............................................................3.3

Self-Test..................................................................................3.4

Section 4

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

Programming the Module .....................................................4.1

Section 5

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

Section 6

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

Installation Problems ...........................................................6.1

Section 7

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

Relay Lookup Tables.............................................................7.1

PCB and Component Layout................................................7.3

CONTENTS

Please use the hyperlinked text to navigate to the page required

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Page (VII)

GENERAL PURPOSE REED RELAY MODULE 10-110/115/120/125

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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 System 10/20 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.

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Page 1.1

LOW NOISE HIGH ISOLATION MULTIPLEXER 20-620-322

pickering SECTION 1 - TECHNICAL SPECIFICATION

SECTION 1 - TECHNICAL SPECIFICATION

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GPIB Low Noise High Isolation Multiplexer 20-620

ISSUE 5.2 JUL 2019

• High Isolation Low Noise Multiplexer

Switching 1 Pole Plus Switched Shield

• Single or Dual Multiplexer Operation

• Uses High Quality Ruthenium Reed Relays For

Maximum Reliability

• Built-In Self Test

• Choice of Shielded Connectors: BNC or XLR

A High Isolation Very Low Noise Multiplexer, available as either

Single 16 to 1 or dual 8 to 1 with a choice of connector types. This

module is intended for high quality multiplexing of low frequency

signals up to 1MHz.

20-620 Multiplexer - For the highest quality switching applications

Applications will be found where general purpose multiplexers

have inadequate isolation and crosstalk performance. These

include: high quality data acquisition (usually 2-pole with

frequencies < 1MHz), audio broadcast/studio, low noise high

isolation instrumentation and very high quality signal routing in ATE

systems.

X Bank 1

MUX Bank 2

The 20-620 is Available as Either a 16 to 1 or

Dual 8 to 1 Multiplexer

0 dB

-0.8 dB

-1.2 dB

-1.6 dB

-2.0 dB

-2.4 dB

-2.8 dB

-0.4 dB

10MHz 20MHz 30MHz

20-620 INSERTION LOSS

-3.2 dB

40MHz

Insertion Loss Plot For The 20-620 Multiplexer

-85 dB

-90 dB

-95 dB

-100 dB

25kHz 50kHz 75kHz

20-620 CROSSTALK – Channel to Channel

--105 dB

100kHz

--110 dB

Crosstalk Plot For The 20-620 Multiplexer

-40 dBm

250kHz 500kHz 750kHz

-80 dBm

1000kHz

-120 dBm

0 dBm

Unguarded noise is approx 5dB's Higher

Note: Measuring System Noise Floor = -120dBm

20-620 NOISE

Noise Performance For The 20-620 Multiplexer

*Please contact Pickering for alternative

PXI/LXI/USB solutions

Page 1.2 LOW NOISE HIGH ISOLATION MULTIPLEXER 20-620-322

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SECTION 1 - TECHNICAL SPECIFICATION

Low Noise High Isolation Multiplexer – 20-620

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Speciﬁcations

Electrical Speciﬁcation

Maximum Switch Voltage:

Maximum High to Low Voltage:

Maximum Guard Voltage (Relative to Hi/Lo):

200V d.c.

100V d.c.

±100V d.c.

Maximum Power:

Maximum Switch Current:

Maximum Carry Current:

10W

0.5A

1.2A

On Path Resistance:

Off Path Resistance:

Differential Thermal Offset:

<300mΩ

>1x1010Ω

<5µV

Maximum Frequency (3dB in 50Ω system):

Capacitance, unselected channel to guard:

Capacitance, selected channel to guard:

Capacitance, unselected channel to common:

40MHz

<40pF

<70pF

<5pF

Expected Life (low power):

Expected Life (high power):

>1x108ops

>5x106ops

Switching Time: <15ms

Noise Level/dBm (0 to 1MHz in 50Ωsystem)

With Passive Guard:

With No Guard:

<-105dBm

<-100dBm

Safety & CE Compliance

All modules are fully CE compliant and meet applicable EU

directives: Low-voltage safety EN61010-1:2010, EMC Immunity

EN61326-1:2013, Emissions EN55011:2009+A1:2010.

Operating/Storage Conditions

Operating Conditions

Operating Temperature:

Humidity:

Altitude:

0°C to +55°C

Up to 90% non-condensing

5000m

Storage and Transport Conditions

Storage Temperature:

Humidity:

Altitude:

-20°C to +75°C

Up to 90% non-condensing

15000m

Programming

The 20-620 Multiplexer module is simple to program:

ARESET a Open all channels on device a

CHAN a,c Select channel con multiplexer a

When in dual 8 to 1 mode the address is

prexed by 1 or 2.

DELAY t Force a minimum delay of tmilliseconds

between two instructions

DIAGNOSTIC? Report any Self Test errors

RESET Open all switches on all modules

VIEW? a View status of device a

AC Performance (50Ω) 10kHz 100kHz 1MHz

Isolation, channel to common:

Isolation, channel to channel:

Isolation, bank to bank:

Isolation, module to module

>90dB

>100dB

>85dB

>78dB

>90dB

>100dB

>68dB

>70dB

>80dB

>90dB

Mechanical Characteristics

All modules conform to the 6U height (262mm) Eurocard standard

and are 160mm deep. Panel width is 2.4 Inches for the BNC

version and 3.6 Inches for the XLR type.

Connectors

Connection to the module front panel is via 18 screened

connectors. The screen for each connector is isolated from the

analogue common except when that channel is selected.

Relay Type

The modules are tted with Ruthenium Reed Relays.

All reed relays are manufactured by our sister company Pickering

Electronics: pickeringrelay.com

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