Pickering 60-750 User manual

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Issue 5.0 April 2021
60-750/751 User Manual
LXI Microwave Matrix

Page (II) LXI MICROWAVE MATRIX 60-750/751
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Page (II) REED RELAY MODULE 40-110/115/120/125
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© COPYRIGHT (2021) PICKERING INTERFACES. ALL RIGHTS RESERVED.
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)
LXI MICROWAVE MATRIX 60-750/751
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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: [phone]
E-mail: [email protected]
Sweden
Tel: [phone]
E-mail: [email protected]
USA
Tel: (West) [phone]
Tel: (East) [phone]
E-mail: [email protected]
Czech Republic
Tel: [phone]
E-mail: [email protected]
France
Tel [phone]
E-mail [email protected]
Pickering Interfaces Headquarters
Stephenson Road Clacton-on-Sea CO15 4NL United Kingdom
Tel: [phone]
E-Mail: [email protected]
China
Tel: [phone]
E-mail: [email protected]

Page (IV) LXI MICROWAVE MATRIX 60-750/751
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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.
!
kg
SAFETY SYMBOLS
PRODUCT SAFETY
The following safety symbols may be used on the product and throughout the product documentation.

Page (V)
LXI MICROWAVE MATRIX 60-750/751
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Copyright Statement ......................................................................II
Technical Support and Warranty..................................................III
Product Safety .............................................................................. IV
Contents (this page)...................................................................... V
Warnings and Cautions .............................................................. VII
Section 1
Technical Specication...............................................................1.1
Performance Plots ...........................................................1.5
Section 2
Technical Desctiption..................................................................2.1
Matrix Operation ..............................................................2.2
Using The Matrix ..............................................................2.3
Auxiliary Port....................................................................2.4
Section 3
Installation....................................................................................3.1
Pre Operation Checks .....................................................3.1
Hardware Installation.......................................................3.1
Setting The IP Address....................................................3.2
Installing The Software....................................................3.3
Soft Front Panel Operation .............................................3.3
Section 4
Programming Guide....................................................................4.1
Programming Options for LXI Units...............................4.1
Programming the 60-750/751 ..........................................4.2
Command Line Control ...................................................4.6
Using The Soft Front Panel...........................................4.13
Section 5
Connections.................................................................................5.1
Microwave Matrix Connectors ........................................5.2
Auxiliary Port Pinout .......................................................5.6
Section 6
Trouble Shooting .........................................................................6.1
LXI Status Indicators .......................................................6.1
LAN Reset.........................................................................6.2
Section 7
Maintenance Information............................................................7.1
Chassis Parts List............................................................7.2
General Maintenance.......................................................7.5
Appendix A
Fitting Rack Mounting Flanges .................................................A.1
CONTENTS

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Page (VII)
LXI MICROWAVE MATRIX 60-750/751
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Page vii
LXI HIGH VOLTAGE 2-POLE MATRIX 60-310
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WARNINGS & 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.
!
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.
WARNING - DANGER OF ELECTRIC SHOCK SYMBOL
This unit may contain hazardous voltages. Before removing the unit from the rack remove all supplies
and disconnect user I/O signals.
If the unit has removable modules, unused slots in the chassis must be populated with blanking
panels to prevent access to user I/O signals that may be present. Blanking panels are available to
order from Pickering. 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.
Not to be used in safety critical circuits, refer to the Pickering Interfaces’ terms & conditions of sale.
This unit must not be used for the switching of Mains Circuits. For the switching of voltages up to the
unit’s full specication, Secondary Circuit power supplies and the Device Under Test must be fully
isolated from the Mains Circuit and the safety earth.
The chassis must be correctly installed and be connected to mains or factory safety ground,
please refer to the installation section of this manual.
Diagram Showing Separation Between The Mains Circuit and Secondary Circuit / DUT
For the purposes of this document, a Mains Circuit is an installation classied as Overvoltage
Category II up to 300V. Separation between the Secondary Circuit and Mains Circuit is achieved
by a transformer in which the primary windings are separated from the secondary windings by
reinforced insulation, double insulation, or a screen connected to the protective conductor terminal.
Switching
Function
Device
Under Test
Power
Supply
Power
Supply
LXI Unit’s Chassis
Secondary Circuit
Mains
Circuit
Mains
Circuit
Mains/Factory
Safety Ground

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Page viii
LXI HIGH VOLTAGE 2-POLE MATRIX 60-310
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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
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.
WARNING - RACK MOUNTING
If it is required to t this unit into a 19 inch rack, its weight must be
supported by side brackets, runners or a suitable equipment shelf.
The xing holes in the front panel anges are designed only for
securing the device in the rack and must NOT be used to support
the weight of the whole device.
Please refer to Appendix A for the procedure for tting the
supplied anges to either side of the front panel.
!
HIGH VOLTAGE SAFETY WARNING
THIS UNIT IS CAPABLE OF SWITCHING VOLTAGES AND CURRENTS THAT CAN
CAUSE SERIOUS INJURIES. IN APPLICATIONS INVOLVING HIGH VOLTAGES IT
IS STRONGLY RECOMMENDED THAT UNUSED CONNECTORS ARE CAPPED
TO PREVENT ACCIDENTAL CONTACT WHILE IN USE. SYSTEM INTEGRATORS
AND USERS SHOULD CONNECT TO THE FRONT PANEL CONNECTORS WITH
CONNECTORS OR CABLE ASSEMBLIES THAT ENSURE OPERATORS WILL NOT
INADVERTENTLY COME IN CONTACT WITH HIGH VOLTAGES.

Page 1.1
LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
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LXI Microwave Matrix 60-750/751
ISSUE 5.0 APR 2021
yVersatile Microwave Matrix Switching Platform
yVersions Available up to Dual 4x4
yLoop-Thru Options For Easy Expansion
yInternally Terminated Versions
yUp to 18 GHz Bandwidth
yLow Loss
yEqual Loss on Each 4x4 Matrix
y50 Ω Impedance
yAuxiliary Port For External Control of Relays
yCustom Versions Available on Request
yLXI Standard 1.4 Compliant
y3 Year Warranty
Single 60-750/751 Non-Blocking 4x4 Matrix
With Optional Loop-Thru and Internal Terminations
Y1 Y2 Y3 Y4
X1
X2
X3
X4
Y Loop Thru
X Loop Thru
4 x 4
MICROWAVE
MATRIX
Loop Thru Switches
Loop Thru Switches
Termination Switches
Termination Switches
The 60-750/751 is an LXI microwave switching matrix
controlled through an LXI compliant Ethernet connection.
The matrix is available in a variety of configurations and
frequencies up to 18 GHz (60-751).
It is characterized for 50 Ω applications, for 75 Ω versions
please consult your local sales representative.
The 60-750/751 is in a 2 U full width enclosure, providing a
compact solution for rack mounted ATE systems or for use
on the bench. The matrix is configured to the specified X-Y
size with no extra cabling needed, saving the cost and time
required creating matrices from individual components.
The 3x3 or 4x4 matrices are designed to have a matched
path loss irrespective of the selected signal route. The
matrices are non-blocking, allowing any input to be
connected to any unused output. Optional Loop-Thru
connections allow matrices to be easily linked to make
larger arrays using external cabling.
The 60-750 is a dual or single 10 GHz matrix or can be
supplied configured as a single 8x4 matrix with the two 4x4
matrices internally connected. The 60-751 is a single 3x3 or
4x4 18 GHz matrix. Models can be ordered with or without
internal terminations for disconnected inputs.
For applications where extra microwave switches are
required the 60-750/751 includes an auxiliary output
that can be used to supply 12 V power and control for 16
external switches.

Page 1.2 LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
LXI Microwave Matrix, 60-750/751
pickeringtest.com
Overview
Example Of The Soft Front Panel Supplied With The 60-750/751 Matrix
Control of the matrices could not be simpler. Communicate with the 60-750/751 via its Ethernet interface using
any W3C compliant browser and run the soft front panel from a PC or a Mac. Alternatively use the programmatic
interface based on Pickering Interfaces switch driver to control the 60-750/751 through DLLs or an IVI compliant
driver.
The 60-750/751 is ideal for applications where a simple start up process is required and for applications requiring
control at large distance.It is the first of a range of commercial and custom microwave switching products with the
LXI control interface. For alternative configurations please contact your local sales office.
Rear View Of The 60-750/751 Matrix Showing Power & LAN Connections

Page 1.3
LXI MICROWAVE MATRIX 60-750/751
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LXI Microwave Matrix, 60-750/751
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Overview
MATRIX 1 (4x4)
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
MATRIX 2 (4x4)
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Multi-pole
uWave relay
Y1
Y2
Y3
Y4
X5
X6
X7
X8
X1
X2
X3
X4
Front Panel
Connectors
Front Panel
Connectors
= Y1 to X1
= Y1 to X5
8x4 MATRIX
Diagram Illustrating The Two Path Lengths
Used In 8x4 Matrices

Page 1.4 LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
LXI Microwave Matrix, 60-750/751
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Specifications
General Matrix Information
Connectors: Front panel SMA, alternatives
available on request.
Operating Time: <18 ms (limited by switches)
Maximum Voltage: 100 VDC*
Maximum Switch Current: 1 A
Path Resistance: On: <500 mΩ
Off: >1010 Ω (unterminated)
Expected Life (operations): Low power: >5 million per
position
Max power: 0.3 million
* For full voltage rating, signal sources to be switched
must be fully isolated from mains supply and safety earth.
Mechanical Characteristics
Supplied with front panel ears to enable rack mounting on a
shelf or other rear support mechanism.
Dimensions: 2
U full rack width, 500 mm deep.
3D models for all versions in a variety of popular file
formats are available on request.
Auxiliary Control
Type: Interface that can be used to operate
16 external switches, fully floating
outputs support common ground or
common power configuration. Each
output can switch up to 2 A and 100 V,
maximum power 10 W.
Power Connection:
12 V protected by resettable fuse with
1.2
A to 2.5 A trip current (operating
temperature dependent)
Connector: 37-pin female D-type
LAN Interface
Compliant to LXI Standard 1.4, the 60-750/751 has a
1000Base-T Ethernet Interface via a standard RJ-45
connector mounted on the rear panel*.
*Note: Legacy units may not have 1000Base-T support.
LXI Status Indicators
Front panel mounted LEDs:
• Power • LAN • Ready • Active • Error
Power Source
Universal AC mains supply, 90-120 V to 200-240 V, 50-60 Hz
Power Inlet on Rear Panel: Male IEC connector
Fuse Rating: 5 A, 250 V
Cooling
Fan assisted cooling, side air intakes and rear exhaust.
Matrix Specification
Extensive typical performance information is provided in
the operating manual which can be downloaded from the
Pickering Interfaces web site.
18 GHz Version (60-751)
Characteristic Impedance: 50 Ω
Maximum Power: 100 W to 3 GHz
60 W to 10 GHz
30 W to 20 GHz
Terminated versions limited
to 1 W on all frequencies.
Typical Isolation: 120 dB
Typical Crosstalk: -120 dB
10 GHz Version (60-750)
Characteristic Impedance: 50 Ω
Maximum Power: 100 W to 3 GHz
60 W to 12 GHz
Terminated versions limited
to 1 W on all frequencies.
Typical Isolation: 120dB
Typical Crosstalk: -120 dB
10 GHz Single 4x4 & 3x3 and Dual 4x4 & 3x3 Matrix
Insertion Loss: <1.5 dB to 4 GHz
<2.5 dB to 10 GHz
VSWR: 1.5:1 to 4 GHz
1.8:1 to 10 GHz
10 GHz Single 8x4 Matrix
Insertion Loss (Y to X1-4): <1.5 dB to 4 GHz
<2.5 dB to 10 GHz
VSWR (Y to X1-4): 1.5:1 to 4 GHz
1.8:1 to 10 GHz
Insertion Loss (Y to X5-8): <2.5 dB to 4 GHz
<3.9 dB to 10 GHz
VSWR (Y to X5-8): 1.7:1 to 4 GHz
2.1:1 to 10 GHz
18 GHz Single 4x4 & 3x3 Matrix
Insertion Loss: <1.5 dB to 6 GHz
<2 dB to 10 GHz
<3 dB to 18 GHz
VSWR: 1.3:1 to 6 GHz
1.5:1 to 10 GHz
1.9:1 to 18 GHz

Page 1.5
LXI MICROWAVE MATRIX 60-750/751
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LXI Microwave Matrix, 60-750/751
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Ordering Information
Operating/Storage Conditions
Operating Conditions
Operating Temperature:
Humidity:
Altitude:
0 °C to +55 °C
Up to 90 % non-condensing
5000 m
Storage and Transport Conditions
Storage Temperature:
Humidity:
Altitude:
-20 °C to +75 °C
Up to 90 % non-condensing
15000 m
Safety & CE Compliance
All products 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.
Mating Connectors & Cabling
For connection accessories for the 60-750/751 please
refer to the 90-011D RF Cable Assemblies data sheet
where a complete list and documentation can be found for
accessories, or refer to the Connection Solutions catalog.
Product Order Codes
Single 10 GHz 50 Ω Matrix
3x3 Matrix
4x4 Matrix
8x4 Matrix
60-750-133
60-750-144
60-750-184
Dual 10 GHz 50 Ω Matrix
Dual 3x3 Matrix
Dual 4x4 Matrix
60-750-233
60-750-244
Single 18 GHz 50Ω Matrix
3x3 Matrix
4x4 Matrix
60-751-133
60-751-144
Terminations and Loop-thru Connections:
For versions with Loop-thru, add the suffix -A.
For versions with internal terminations, add the suffix -B.
For versions with Loop-thru and internal terminations,
add -C.
For example:
4x4 18 GHz Matrix with Loop Thru &
internal termination
60-751-144-C
Product Customization
Pickering’s products are designed and manufactured on
our own flexible manufacturing lines, giving complete
product control and enabling simple customization to meet
very specific requirements.
Customization can include:
• Alternative relay types
• Mixture of relay types
• Alternative number of relays
• Different performance specifications
All customized products are given a unique part number,
fully documented and may be ordered at any time in the
future. Please contact your local sales office to discuss.

Page 1.6 LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
LXI Microwave Matrix, 60-750/751
pickeringtest.com
Supporting Products & Software
We also offer customized cabling and have a free online Cable Design Tool
that can be used to create custom cable solutions for many applications.
Visit: pickeringtest.com/cdt to start your design.
Mass Interconnect
We recommend the use of a mass interconnect solution when an
Interchangeable Test Adapter (ITA) is required for a PXI or LXI based
test system. Our modules are fully supported by both Virginia Panel and
MacPanel.
Pickering Reed Relays
We are the only switch provider with in-house reed relay manufacturing
capability via our Relay Division. These instrument grade reed relays feature
SoftCenter™ technology, ensuring long service life and repeatable contact
performance. To learn more, please go to: pickeringrelay.com
Connectivity Solutions
We provide a full range of supporting cable and connector solutions for all our switching products—20 connector families
with 1200+ products. We offer everything from simple mating connectors to complex cables assemblies and terminal blocks.
All assemblies are manufactured by Pickering and are guaranteed to mechanically and electrically mate to our modules.
Connectors & Backshells Multiway Cable Assemblies RF Cable Assemblies Connector Blocks
Programming
Pickering provide kernel, IVI and VISA (NI & Keysight) drivers which are compatible with all Microsoft supported versions of
Windows and popular older versions. For a list of all supporting operating systems, please see: pickeringtest.com/os
The VISA driver is also compatible with Real-Time Operating Systems such as LabVIEW RT. For other RTOS support contact
Pickering. These drivers may be used with a variety of programming environments and applications including:
• Pickering Interfaces Switch Path Manager
• National Instruments products (LabVIEW, LabWindows/CVI, Switch Executive, MAX, TestStand, VeriStand, etc.)
• Microsoft Visual Studio products (Visual Basic, Visual C+)
• Keysight VEE and OpenTAP
• Mathworks Matlab
• Marvin ATEasy
• MTQ Testsolutions Tecap Test & Measurement Suite
As well as various open source environments such as:
• Sharp Develop
• Dev-C++
To learn more about software drivers and development environments, please go to: pickeringtest.com/software

Page 1.7
LXI MICROWAVE MATRIX 60-750/751
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LXI Microwave Matrix, 60-750/751
pickeringtest.com
Supporting Products & Software
© Copyright (2021) Pickering Interfaces. All Rights Reserved Pickering Interfaces maintains a commitment to continuous product development, consequently we reserve the right to vary from the description given in this data sheet.
Signal Routing Software
Our signal routing software, Switch Path Manager, automatically selects and energizes
switch paths through Pickering switching systems. Signal routing is performed by simply
defining test system endpoints to be connected together, greatly accelerating Test System
software development. To learn more, please go to: pickeringtest.com/spm
Diagnostic Relay Test Tools
eBIRST Switching System Test Tools are designed specifically for our PXI,
PCI or LXI products, these tools simplify switching system fault-finding by
quickly testing the system and graphically identifying the faulty relay.
To learn more, please go to: pickeringtest.com/ebirst
Three Year Warranty & Guaranteed Long-Term Support
All standard products manufactured by Pickering Interfaces are warranted against defective materials and workmanship
for a period of three years from the date of delivery to the original purchaser. Extended warranty and service agreements
are available for all our modules and systems with various levels to suit your requirements. Although we offer a 3-year
warranty as standard, we also include guaranteed long-term support—with a history of supporting our products for typically
15-20 years. To learn more, please go to: pickeringtest.com/support
Available Product Resources
We have a large library of product resources including success stories, product and support videos, articles and white
papers as well as application specific product brochures to assist when looking for the switching, simulation and
connection solutions you need. We have also published handy reference books on Switching Technology and for the PXI
and LXI standards.
To view, download or request any of our product resources, please visit: pickeringtest.com/resources

Page 1.8 LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
Fig 1-1. Typical VSWR Plot for 60-750 Single 4x4 Microwave Matrix Up To 10GHz
Fig 1-2. Typical Insertion Loss Plot for 60-750 Single 4x4 Microwave Matrix Up To 10GHz
PERFORMANCE PLOTS
The following performance plots show typical response curves for a 4x4 microwave matrix. In each instance, curves
are shown for a signal path across the matrix between X and Y terminals. Figures 1-1 & 1-2 are for the 60-750 for
frequencies up to 10GHz and gures 1-3 & 1-4 are for the 60-751 for frequencies up to 18GHz.

Page 1.9
LXI MICROWAVE MATRIX 60-750/751
pickering SECTION 1 - TECHNICAL SPECIFICATION
Fig 1-3. Typical VSWR Plot for 60-751 Single 4x4 Microwave Matrix Up To 18GHz
Fig 1-4. Typical Insertion Loss Plot for 60-751 Single 4x4 Microwave Matrix Up To 18GHz

Page 1.10 LXI MICROWAVE MATRIX 60-750/751
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SECTION 1 - TECHNICAL SPECIFICATION
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Page 2.1
LXI MICROWAVE MATRIX 60-750/751
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SECTION 2 - TECHNICAL DESCRIPTION
FUNCTIONAL DESCRIPTION
The 60-750/751 is a single or dual microwave matrix under the control of an LXI interface designed for the routing
of signals with frequencies up to 10GHz or 18GHz dependant upon the version. In the case of dual matrices, each
matrix can be used in isolation or linked together to form a bigger matrix. A separate auxiliary port is provided for
the switching of external devices that may be required by the user. A block diagram for a dual 4x4 matrix is shown
in Figure 2-1
16 x AUXILIARY RELAYS4 x 4 MICROWAVE MATRIX 1 4 x 4 MICROWAVE MATRIX 2
RELAY
DRIVER
BOARDS
LAN
INTERFACE
PWR
RDY
ERR
LAN
ACT
STATUS LEDs
RJ45
SOCKET
EMBEDDED
PROCESSOR
FRONT PANEL SMA CONNECTORS - MATRIX 2
FRONT PANEL SMA CONNECTORS - MATRIX 1
OVER-
CURRENT
PROTECTION
FRONT PANEL AUXILIARY RELAY SOCKET
POWER
SUPPLY
+12V
BRIDGE
BOARD
X-BUS
X-BUS
Y-BUS
Y-BUS
Switch setting information for the matrix is sent from the Embedded Processor to the relay driver PCBs via a Bridge
circuit. Programming information for the processor is sent to the unit via the LAN interface from a remote computer
using the unit’s unique Ethernet address. Programming documentation for the unit as well as data for Pickering’s
other LXI compatible switching products is stored in the embedded processor and can be dowloaded over the LAN
interface. Status LEDs on the front of the chassis indicate the condition of the unit and the LAN connection.
Figure 2-1. Block Diagram for the 60-750 Dual 4x4 Microwave Matrix

Page 2.2 LXI MICROWAVE MATRIX 60-750/751
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SECTION 2 - TECHNICAL DESCRIPTION
MATRIX OPERATION
Each matrix is constructed from 6-way microwave multiplexers. In the case of a 4x4 matrix, eight multiplexers
are used, four for the X bus and four for the Y bus, with the common for each multiplexer fed to the X and Y front
panel SMA connectors. Four channels of each X multiplexer are connected to one channel of each of the four Y
multiplexers (see Figure 2-2). This allows any X signal to be connected to any Y signal with a maximum of four
“cross-points” being active at any one time.
The fth channel of each multiplexer is reserved for the optional Loop Thru facility. This allows signals that aren’t
being routed through the matrix to be fed back to front panel connectors for linking to other matrices. In this way
larger microwave matrices can be constructed with a small amount of performance penalty due to the extra relay
and interconnecting cable in the signal path.
Optional terminations are connected to the sixth channel of each multiplexer. This maintains the transmission line
characteristics for signals that are not routed through the matrix and not looped back by connecting them to a 50Ω
terminator.
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
50 OHM
TERMI-
NATION
X1
X2
X3
X4
X1 Loop Thru
X2 Loop Thru
X3 Loop Thru
X4 Loop Thru
Y1 Y1 Loop
Thru
Y2 Y3 Y4Y2 Loop
Thru
Y3 Loop
Thru
Y4 Loop
Thru
Figure 2-2. Diagram showing how a 4x4 Microwave Matrix is constructed from 6-way multiplexers (signal
paths are shown between X1-Y3 and X3-Y2, all other signals are in the terminated state)