Agilent U2121A-101 RF
Switch Driver Board
Operating Guide
Agilent Technologies
Notices
CAUTION
WARNING
® Agilent Technologies, Inc. , 2008
No p art o f this ma nual may be re prod uced in
any form or by any means (including electronic storage and retrieval or translation
into a foreign language) without prior agreement and written consent from Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
U2931-90001
Edition
Second Edition, June 6, 2008
Agilent Technologies, Inc.
3501 Stevens Creek Blvd.
Santa Clara, CA 95052 USA
Trademark Acknowledgements
Pentium is a U.S. registered trademark of
Intel Corporation.
Microsoft, Visual Studio, Windows, and MS
Windows are trademarks of Microsoft Corporation in the United States and/or other
countries.
Warranty
The material contained in this document is provided “as is,” and is subject to being changed, without notice,
in future editions. Further, to the maximum extent permitted by applicable
law, Agilent disclaims all warranties,
either express or implied, with regard
to this manual and any information
contained herein, including but not
limited to the implied warranties of
merchantability and fitness for a particular purpose. Agilent shall not be
liable for errors or for incidental or
consequential damages in connection with the furnishing, use, or performance of this document or of any
information contained herein. Should
Agilent and the user have a separate
written agreement with warranty
terms covering the material in this
document that conflict with these
terms, the warranty terms in the separate agreement shall control.
Technology Licenses
The hardware and/or software described in
this document are furnished under a license
and may be used or copied only in accordance with the terms of such license.
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the federal government include only those
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for the Department of Defense, DFARS
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Items) and DFARS 227.7202-3 (Rights in
Commercial Computer Software or Computer Software Documentation).
Safety Notices
A CAUTION notice denotes a haz-
ard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly performed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated conditions are fully understood and
met.
II U2121A-101 Operating Guide
Safety Symbols
Direct current (DC)
Alternating current (AC) Off (supply)
Both direct and alternating current On (supply)
Three-phase alternating current Caution, risk of electric shock
Earth (ground) terminal
The following symbols on the instrument and in the documentation
indicate precautions, which must be taken to maintain safe operation of
the instrument.
Equipment protected throughout by
double insulation or reinforced
insulation
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Protective conductor terminal Caution, hot surface
Frame or chassis terminal Out position of a bi-stable push control
Equipotentiality In position of a bi-stable push control
U2121A-101 Operating Guide III
General Safety Information
WARNING
CAUTION
• Do not load the output terminals above the specified current limits.
• Do not use the device if it appears damaged or defective.
• Observe all markings on the device before connecting any wiring to
the device.
• Do no operate the device in the presence of flammable gases or
fumes.
• Do no install substitute parts or perform any unauthorized
modification to the device.
• Applying excessive voltage or overloading the device will cause
irreversible damage to the circuitry.
• Use the device with the cables provided.
• Repair or service that is not covered in this manual should only be
performed by qualified personnels.
• To avoid ESD damage to the RF switch driver board, users are highly
recommended to comply with the following cautions:
• User are required to discharge themselves to any large metal object
(e.g. Shelf, desk, etc.) prior to operating the RF switch driver board.
• Operate the RF switch driver board under an ESD protected workstation,
with the minimum requirements of using wrist strap (connected to ground)
and ESD pad. The wrist strap can be grounded by connecting to the power
supply ground and/or circuit board ground.
• Avoid human body contact or a charged material to the on-board components
and circuitries. Always hold the board edges when carrying the RF switch driver
board.
IV U2121A-101 Operating Guide
Environmental Conditions
CAUTION
This instrument is designed for indoor use and in an area with low
condensation. The table below shows the general environmental
requirements for this instrument.
Environmental conditions Requirements
Operating temperature 0 °C to 40 °C
Storage temperature –40 °C to 70 °C
Operating humidity Up to 85% at 40 °C (non-condensing)
Storage humidity 5% to 90% RH (non-condensing)
The U2121A-101 RF switch driver board complies with the following safety
and EMC requirements.
• IEC 61326-2002/EN 61326:1997+A1:1998+A2:2001+A3:2003
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
• IEC 61010-1:2001/EN 61010-1:2001 (2nd edition)
U2121A-101 Operating Guide V
Regulatory Markings
The CE mark is a registered trademark
of the European Community. This CE
mark shows that the product complies
with all the relevant European Legal
Directives.
ICES/NMB-001 indicates that this
ISM device complies with the
Canadian ICES-001.
Cet appareil ISM est confomre a la
norme NMB-001 du Canada.
This symbod 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.
The C-tick mark is a registered
trademark of the Spectrum
Management Agency of Australia.
This signifies compliance with
the Australia EMC Framework
regulations under the terms of the
Radio Communication Act of 1992.
This instrument complies with the
WEEE Directive (2002/96/EC)
marking requirement. This affixed
product label indicates that you must
not discard this electrical/electronic
product in domestic household waste.
VI U2121A-101 Operating Guide
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard
this electrical/electronic product in domestic household waste.
Product Category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is shown as below.
Do not dispose in domestic household waste
To return this unwanted instrument, contact your nearest Agilent
Te c hn o lo gie s , o r vi s i t:
www.agilent.com/environment/product
for more information.
U2121A-101 Operating Guide VII
DECLARATION OF CONFORMITY
According to EN ISO/IEC 17050-1:2004
Generic example
Manufacturer’s Name:
Agilent Technologies Microwave Products (M) Sdn. Bhd
Manufacturer’s Address:
Bayan Lepas Free Industrial Zone,
11900, Bayan Lepas, Penang, Malaysia
Declares under sole responsibility that the product as originally delivered
Product Name:
Agilent RF Switch Board
Models Number:
U2931A
Product Options:
This declaration covers all options of the above product(s)
complies with the essential requirements of the following applicable European Directives, and
carries the CE marking accordingly:
Low Voltage Directive (2006/95/EC)
EMC Directive (2004/108/EC)
and conforms with the following product standards:
EMC
Standard
StandardStandard
Standard Limit
LimitLimit
Limit
IEC 61326:2002 / EN 61326:1997+A1:1998+A2:2001+A3:2003
CISPR 11:1990 / EN55011:1990 Class A Group 1
IEC 61000-4-2:1995 / EN 61000-4-2:1995 4 kV CD, 8 kV AD
IEC 61000-4-3:1995 / EN 61000-4-3:1996 3 V/m, 80-1000 MHz
IEC 61000-4-4:1995 / EN 61000-4-4:1995 0.5 kV signal lines, 1 kV power lines
IEC 61000-4-5:1995 / EN 61000-4-5:1995 0.5 kV line-line, 1 kV line-ground
IEC 61000-4-6:1996 / EN 61000-4-6:1996 3 V, 0.15-80 MHz
IEC 61000-4-11:1994 / EN 61000-4-11:1994 1 cycle / 100%
Canada: ICES-001:2004
Australia/New Zealand: AS/NZS CISPR11:2004
The product was tested in a typical configuration with Agilent Technologies test systems.
Safety
IEC 61010-1:2001 / EN 61010-1:2001
Additional Information:
The U2931A receives power from an AC/DC power supply model DSA-60W-20 1 24060.
This DoC applies to above-listed products placed on the EU market after:
31-March-2008
Date
Tay Eng Su
Quality Manager
For further information, please contact your local Agilent Technologies sales office, agent or distributor,
or Agilent Technologies Deutschland GmbH, Herrenberger Straße 130, 71034 Böblingen, Germany.
Template: A5971-5302-2, Rev. E U2931A DoC Revision 1.0
VIII U2121A-101 Operating Guide
Product Regulations
Performance Criteria
IEC 61326-1:2002 / EN 61326-1:1997+A1:1998+A2:2001+A3:2003
CISPR 11:1990 / EN 55011:1990
– Group 1 Class A
IEC 61000-4-2:1995 / EN 61000-4-2:1995
(ESD 4kV CD, 8kV AD) A
IEC 61000-4-3:1995 / EN 61000-4-3:1996
(3V/m, 80% AM) A
IEC 61000-4-4:1995 / EN 61000-4-4:1995
(EFT 0.5kV line-line, 1kV line-earth) A
IEC 61000-4-5:1995 / EN 61000-4-5:1995
(Surge 0.5kV line-line, 1kV line-earth) A
IEC 61000-4-6:1996 / EN 61000-4-6:1996
(3V, 0.15~80 MHz, 80% AM, power line) A
IEC 61000-4-11:1994 / EN 61000-4-11:1994
(Dips 1 cycle, 100%) A
Canada: ICES-001:2004
Australia/New Zealand: AS/NZS CISPR11:2004
EMC
IEC 61010-1:2001 / EN 61010-1:2001
Safety
Additional Information:
The product herewith complies with the essential requirements of the Low Voltage Directive 2006/95/EC and the
EMC Directive 2004/108/EC and carries the CE Marking accordingly (European Union).
1
Performance Criteria:
A Pass - Normal operation, no effect.
B Pass - Temporary degradation, self recoverable.
C Pass - Temporary degradation, operator intervention required.
D Fail - Not recoverable, component damage.
N/A – Not applicable
Notes:
Regulatory Information for Canada
ICES/NMB-001:2004
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est confomre à la norme NMB-001 du Canada.
Regulatory Information for Australia/New Zealand
This ISM device complies with Australian/New Zealand AS/NZS CISPR11:2004
U2121A-101 Operating Guide IX
X U2121A-101 Operating Guide
Contents
Introduction 2
Standard Purchase Items Checklist 4
Product at a Glance 5
Product outlook 5
Product dimensions 6
Connector Pins Configuration 7
Installation Guide 10
A. Check your system 11
B. Install prerequisites and software 12
C. Connect the hardware solution to your PC 14
D. Launch the Agilent U2121A-Based RF Switch Driver Software 15
Supported Switches 19
Product Characteristics and Specifications 21
Maintenance 23
Disassemble Procedure 24
Ordering Info 26
Optional accessory 26
Appendix A: Control Instructions 29
Appendix B: Y1157A Cable Assembly Instructions 31
U2121A-101 Operating Guide 1
Introduction
CAUTION
The Agilent U2121A- 101 (also known as U2931A) RF switch driver
with cable is an adapter board designed for use with the Agilent
U2121A digital IO device. It enables you to control various types of
RF switches easily and has enhanced driving capability and consists
of different types of connectors to suit different switches.
The U2121A-101 purchase consists of a driver interface module, an
interface cable (equipped with a 37- pin D- sub connector on one end
and four 10- way terminal block connectors on the other end), a
10- pin to D- sub adapter, and a 24 VDC, 2.5 A power adapter. This
module is connected to the U2121A using the provided interface
cable. You can also use the Y1157A
connector to 9- pin D- Sub cable kit for the Agilent N1810/11/12
coaxial switches.
This module is consists of five RF switch driver channels and one
general IO terminal. Each channel is pre-programmed to drive three
different types of Agilent RF switches. Only one type of RF switch
can be connected to a single channel during operation.
[1]
cable, which is a 10- pin ribbon
DO NOT connect different types of RF switches to the same channel during
operating time.
2 U2121A-101 Operating Guide
The U2121A-101 module is designed to handle 24 VDC switches.
[1] Refer to Appendix B for Y1157A cable kit assembly.
Power supply
The switches on this module are powered by the provided power
adapter. There is only one power supply voltage available for this
module, which is 24 VDC, 2.5 A.
Power consumption
The U2121A- 101 can drive up to 1500 mA continuously using the
provided power supply. For each channel, it is able to drive up to 300
mA load per switch. Precaution must be taken to ensure that the
total current consumption on all channels is not more than 1500 mA,
which is the maximum driving capability of the module.
U2121A-101 Operating Guide 3
Standard Purchase Items Checklist
Verify that you have received the following items with your purchase.
U2121A- 101 RF switch driver board with cable purchase. If anything is
missing or damaged, please contact the nearest Agilent Sales Office.
✔ RF switch driver board
✔ RF switch driver board interface
✔ U2931- 60013 10 ways IDC to 9- pins D- Sub adapter
✔ U2931- 60012 power adapter
✔ Agilent U2121A- 101 RF Switch Driver Board Operating Guide
✔ Agilent U2931A RF Switch Driver Product Reference CD- ROM
4 U2121A-101 Operating Guide
Product at a Glance
Connector for
general I/O
Connector for
general output
Connector for
general input
DC power jack Power Digital IO Connector for
rating terminal N181x RF switches
Connector for Connector for 8762/3/4
8765x-024 RF switches 8765x/324 RF switches
Product outlook
Top view (without casing)
U2121A-101 Operating Guide 5
Product dimensions
72.00 mm
150.00 mm
85.00 mm
153.00 mm
38.00 mm
85.00 mm
Top view (without casing)
Top view (with casing)
Front view (with casing) Side view (with casing)
6 U2121A-101 Operating Guide
Connector Pins Configuration
Pin out configuration for all terminals
Ta b l e 1 8762/2/3 and 8765x-324 Series switches (X1 to X5)
Pin Function
1Position #1
2Position #2
3N.C.
4+24 V
Ta b l e 2 8765x-024 Series switches (SL1 to SL5)
Pin Function
1Position #2
2N.C.
3+24 V
4+24 V
5Position #1
Ta b l e 3 N181X Series switches (SV1 to SV5)
Pin Function Pin Function
1GND2 +5 V
3N.C.4Indicator B
5Position B6 +5 V
7Position A8 Indicator A
9+24 V10 N.C.
U2121A-101 Operating Guide 7
IO mapping
WARNING
There are three main control bits used in the U2121A- 101 as shown
in tables below. These control bits also refers to the U2121A control
bit status.
Ta b l e 4 Output enable/disable control
Control Stage Control Bit, DO14 Description
Output disabled OFF (0) To disable all outputs in U2121A
Output enabled ON (0) To enable all outputs in U2121A
- 101
- 101
Ta b l e 5 Position information read back control
RF Switches Control Bit Description
D16 D15
8765x and 8762/3/4 OFF (0) ON (1) Read position information from 8765x and
8762/3/4 series switches
N181x ON (1) OFF (0) Read position information from N181x
series switches
DO NOT set both D15 and D16 control bits to ON stage!
8 U2121A-101 Operating Guide
Each of the five RF switch channels uses two digital output pins and
two digital input pins during the operation.
Ta b l e 6 a IO mapping for 8762/3/4, 8765x-324 and N181x Series RF switches
Channel Control Bit Position Bit
State A State B State A State B
1O1O2I1I2
2O3O4I3I4
3O5O6I5I6
4O7O8I7I8
5 O9 O10 I9 I10
General IO O11, O12 & O13 I11, I12 & I13
Ta b l e 6 b IO mapping for 8765x-024 Series RF switches
Channel Control Bit Position Bit
State A State B State A State B
1O2O1I2I1
2O4O3I4I3
3O6O5I6I5
4O8O7I8I7
5O10O9I10I9
General IO O11, O12 & O13 I11, I12 & I13
Ta b l e 7 Position indicator stage definition
RF Switches Model Activated Deactivated
8732/3/4 Series and 875x Series OFF (0) ON (1)
N181x Series ON (1) OFF (0)
U2121A-101 Operating Guide 9
Installation Guide
NOTE
A. Check your system
B. Install prerequisites and software
C. Connect the hardware solution to your PC
D. Launch the Agilent U2121A-Based RF
Switch Driver Software
Follow the step- by- step instructions shown in the following flowchart
to get started with the preparations and installations of your Agilent
U2121A- Based RF Switch Driver Software.
You need to install the IVI-COM driver if you are going to use the U2121A- 101
with Agilent VEE Pro, LabVIEW, or Microsoft
®
Visual Studio®.
10 U2121A-101 Operating Guide
A. Check your system
NOTE
Prior to any installation or configuration, please ensure that your PC
meets the following minimum system requirements.
Hardware requirements
Hardware required Specification (minimum)
Processor 1.6 GHz Pentium® IV or higher
Operating System Windows® XP Professional or Home Edition (Service Pack
1 or later), or Windows® 2000 Professional (Service Pack
4 or later)
Vide o 1024×768 recommended
Browser Microsoft® Internet Explorer 5.01 or higher (6.0 or higher
recommended)
Available RAM 128 MB or higher (256 MB or higher recommended)
Hard Disk Space 1 GB required for installation
Software requirements
Software required Version (minimum)
Agilent VEE Pro Runtime Ver s io n 8.5
Agilent U2121 IVI Driver Version 1.0.9.0
Agilent IO Libraries Suite Version 15.0
Microsoft
®
.NET Framework Version 1.1 and 2.0
[1]
[1]
[2]
or higher
[1]
Agilent IO Libraries Suite 15.0 is required if your PC is running on Microsoft®
Windows Vista™ 32-bit operating system.
[1] Bundled with Agilent U2121A-Based RF Switch Driver Software installer.
[2] Obtained from Agilent Automation-Ready CD.
U2121A-101 Operating Guide 11
B. Install prerequisites and software
NOTE
There are two options you may choose from to install the
prerequisites and Agilent U2121A-Based RF Switch Driver Software.
You may choose to install from the provided Product Reference
CD- ROM or obtain the installation software from Agilent's website to
install the software.
Prior to installing the prerequisites and Agilent U2121-Based RF Switch Driver
Software, ensure that your PC meets the minimum system requirements for
installation and operation processes.
Installing the application software from CD
1 Disconnect any instrument that is connected to your PC and close
all other applications on your PC.
2 Insert the Product Reference CD- ROM into your CD-ROM drive.
3 The installer will automatically launch the Agilent U2121A- Based
Installation Menu. Click Application to begin installation of the
following items:
i Microsoft .NET Framework 2.0
ii Agilent VEE Pro 8.5 Runtime
iii Agilent U2121 IVI Driver
iv Agilent U2121A- Based RF Switch Driver Software
12 U2121A-101 Operating Guide
4 If the installation menu does not appear after a few seconds, go to
NOTE
Start > Run and type <drive>:\Application\setup.exe where
<drive> is your CD-ROM drive location.
5 Click OK to begin the installation of the following items.
6 If you do not have any of the prerequisites installed, the
InstallShield Wizard software prerequisite will appear.
7 Click OK to begin the installation of the listed missing
prerequisites.
8 Once the above installation has completed, installation of the
U2121A-Based RF Switch Driver Software will proceed as normal.
9 The Agilent RF Switch Driver InstallShield Wizard dialog will appear.
Click Next to begin.
10 Read the License Agreement and select I accept the terms in the License
Agreement to proceed. You may click Print to print a hardcopy of the
Agilent License Terms for your reference. Click Next to proceed.
11 Fill in the Customer Information Form accordingly, and click Next.
12 Click Next to install to the specified folder or click Change to install
to a different folder.
13 Click Install to begin the installation of the U2121A- Based RF
Switch Driver Software.
14 Click Finish when the installation has completed.
15 A shortcut to this software will be created to your desktop.
USING THE LICENSED MATERIALS INDICATES YOUR ACCEPTANCE OF THE
LICENSE TERMS. IF YOU DO NOT AGREE TO ALL OF THESE TERMS, YOU
MAY RETURN ANY UNOPENED LICENSED MATERIAL FOR A FULL REFUND,
IF THE LICENSED MATERIALS ARE BUNDLED OR PRE-LOADED WITH
ANOTHER PRODUCT, YOU MAY RETURN THE ENTIRE UNUSED PRODUCT
FOR A FULL REFUND.
Downloading the application software from the Web
1 Go to http://www.agilent.com/find/DIOsolution/, and download the
Agilent U2121A- Based RF Switch Driver Software.
2 Save the file to any location on your hard disk.
U2121A-101 Operating Guide 13
3 Disconnect any instrument that is connected to your PC and close
NOTE
all other applications on your PC.
4 Double- click the saved installation file to begin installation.
5 If you do not have any of the prerequisites installed, the
Wizard
software prerequisite will appear.
6 Click OK to begin the installation of the listed missing
prerequisites.
7 Once the above installation has completed, installation of the
Agilent U21210A-BAsed RF Switch Driver Software will proceed as
normal.
8 Follow the instructions on your screen to begin the installation.
9 Click Finish once the installation has completed.
C. Connect the hardware solution to your PC
1 Connect the U2121A- 101 board digital IO terminal to the U2121A
terminal block using the interface cable.
2 Connect the power adapter to the RF switch driver board’s DC
power jack.
3 Connect the RF switches as below:
i For 8762/3/4 and 8765x- 324 RF switches, connect to any SL1
to SL5
ii For 8765x- 024 RF switches, connect to any X1
iii For N181x RF switches, connect to any SV1
[1]
slot.
[2]
[3]
to SV5
to X5
[3]
InstallShield
[1]
[2]
slot.
slot.
Connect only one type of the RF switch to one channel. Do not use multiple
switches simultaneously on one channel.
4 Connect other types of load to general IO, X7
[4]
or X8
[5]
if required. The load voltage is 24 VDC. The maximum load should
not exceed 300 mA per output channel and 3 mA per input
channel.
14 U2121A-101 Operating Guide
and X9
[6]
WARNING
The total allowable current is 1500 mA. Please ensure that the total current
NOTE
consumption is not more than 1500 mA.
[1] SL1 to SL5 refers to the 8762/3/4 and 8765x-324 RF switch connectors for Ch1 to Ch5.
[2] X1 to X5 refers to the 8765x-024 RF switch connectors for Ch1 to Ch5.
[3] SV1 to SV5 refers to the N181x RF switch connectors for Ch1 to Ch5.
[4] X7 refers to the connector for general I/O on the switch driver board.
[5] X8 refers to the connector for general output on the switch driver board.
[6] X9 refers to the connector for general input on the switch driver board.
D. Launch the Agilent U2121A-Based RF Switch Driver Software
Before you proceed, ensure that your system meets the minimum system
requirements.
U2121A-101 Operating Guide 15
1 Before attempting to start- up your U2121A- Based RF Switch Driver
Software, it is recommended to follow the step- by- steps
instructions below.
2 Plug in your instrument via the supported USB socket.
3 Go to Start > All Programs > Agilent IO Libraries Suite > Agilent Connection
Expert to launch the Connection Expert.
4 The detected U2121A will be visible on the Instrument I/O on this PC
explorer pane. Right- click on the U2121A instrument on the
explorer pane.
5 A context menu will appear as shown below. Select Send Commands
To T h is I n st r u me n t.
6 The Agilent Interactive IO dialog box will appear. Click Send & Read
NOTE
to send the *IDN? default command. The instrument’s response
should appear in the Instrument Session History panel.
7 If the Connection Expert can successfully communicate with the
U2121A, this indicates that the instrument has been installed
correctly.
• The IO Control will launch automatically when you start your PC.
• Launching the VEE without the IO Control running will cause failure of the
VEE to detect or establish any connection with the U2121A connected to
your PC.
• To run the IO Control, go to Start > All Programs > Agilent IO Libraries
Suite > Utilities > IO Control.
16 U2121A-101 Operating Guide
8 Double- click Agilent U2121A-Based RF Switch Driver Software icon on
your desktop or go to Start > All Programs > Agilent U2121A-Based RF
Switch Driver > U2121A-Based RF Switch Driver Software to launch the
software.
9 The U2121A-Based RF Switch Driver Software screen will appear.
10 To start the application, click on the Start button. The Select USB
Device dialog box will appear displaying the connected U2121A
devices. Select a U2121A device and click on it to establish the
connection.
11 Select the switch type corresponding to the connected switch on
each channel.
U2121A-101 Operating Guide 17
12 Use the toggle paddle for each channel in the program to select
NOTE
respective switch position.
13 Use the checkbox and the Send Output button in the General Output
section to control the output devices connected to the RF switches.
14 To view the General Input Status, click the Refresh Input Status Bits
button in the General Input section.
15 Click Exit to leave the program, all switches will be disabled upon
exiting the program.
Refer to the Agilent U2121A-Based RF Switch Driver Software Help File for more
information.
18 U2121A-101 Operating Guide
Supported Switches
Drive activated
H
L
DO
Channel
Output
enable
Drive ChA
Drive ChB
Drive active
Drive active
The U2121A- 101A supports three types of Agilent RF switches as
shown in Table 9. User can choose to drive the same switches in all
five channels or a mixture of three switches for five channels.
However, only one type of switch can be used in a channel at a time.
Do not use multiple types of switches in the same channel.
Drive modes
The RF switch driver board drives the switches using the open
collector drive method. It provides a current path to the ground when
asserted.
Continuous Drive
Continuous drive method controls the switches by activating the
control bit and holds it until it is disabled. This mode will have a
consistent current draw when the switch is activated.
U2121A-101 Operating Guide 19
Pulse drive
Output
enable
Drive ChA
Drive ChB
Drive active
Drive active
Controlled supply
Output
From U2121A DO
Input
To U2121A DI
Output circuit Input circuit
Pulse drive method controls the switches using a ~30 ms pulse. As
shown in the figure below, the control signal is applied to one of the
control bit and held for the preset time.
General IO
There are three digital outputs and three digital inputs available in
the U2121A-101 as an auxiliary port. These three output pins are
capable to drive up to 300 mA of load. The digital input pin has a
direct connection to the U2121A.
20 U2121A-101 Operating Guide
Product Characteristics and Specifications
Ta b l e 8 General characteristics of the U2121A-101 RF switch driver board
General Characteristics
Power consumption • +24 VDC, 2.5 A
• Isolated ELV supply source
Operating environment 0 °C to 40 °C
Storage temperature –40 °C to 70 °C
Operating humidity Up to 85% at 40 °C (non-condensing)
Storage humidity 5% to 90% RH (non-condensing)
EMC • IEC61326-2002/EN61326:1997+A1:1998+A2:2001+A3:2003
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
Safety IEC 61010-1:2001/EN 61010-1:2001 (2nd edition)
Driving current per channel 300 mA (max)
Total current 1500 mA (max)
IO channels for RF switch 5 channels
Generic IO 3 digital inputs and 3 digital outputs
Board dimension (W x D) 150 mm x 72 mm
Casing dimension (W x D x H) 153 mm x 85 mm x 38 mm
Weight • With casing: 146 g
• Without casing: 86 g
Warranty One year
U2121A-101 Operating Guide 21
Ta b l e 9 Type of switches supported by U2121A-101 RF switch driver board
Switch/Attenuator Reference
Document No.
Agilent N1810/11/12 Coaxial Switches
N1810UL/TL
N1811TL
N1812TL
Agilent 8762/63/64 Coaxial Switches
8762A/B/C/F
8763A/B/C
8764A/B/C
Agilent Microwave SPDT Switches
8765A/B/C/D 5952-2231E
8765A/B/C/D 5952-2231E
5968-9653E
5952-1873E
Coil Voltage Connection Type Drive Options
Option 124
24 VDC
Option 024
24 VDC
Option 324
24VDC
Option 024
24 VDC
Option 201
D-Sub 9-pin female
Solder Lugs
Solder Terminals
Ribbon cable terminated
with single in-line
Option 402
Position Indicators
STD
Direct coil for open drain
STD
Direct coil for open drain
STD
Direct coil for open drain
22 U2121A-101 Operating Guide
Maintenance
1 Power off your device, unplug the DC power jack and remove the
RF switch driver board interface cable from your device.
2 Remove your device from the plastic casing.
3 Shake out any dirt that may have accumulated on the RF switch
driver board.
4 Wipe your RF switch driver board with a dry cloth and install the
plastic casing back in place.
U2121A-101 Operating Guide 23
Disassemble Procedure
The following steps shows the disassemble procedure of the RF switch
driver board from its casing.
1 Remove the two screws on either side of the board.
2 Remove the side panel from the casing.
24 U2121A-101 Operating Guide
3 Remove the PCA from the casing.
4 The disassembled RF switch driver board is shown below.
U2121A-101 Operating Guide 25
Ordering Info
To order the U2931A RF switch driver, please select the U2121A and
U2121A–101 ordering options. This will include the U2121A digital IO
device and U2121A–101 RF switch driver board and cable. You can
also order the U2931A RF switch driver board as a standalone unit
by choosing the U2931A–101 ordering option.
Ta b l e 1 0 RF switch driver board ordering options
Ordering Option
(with U2121A)
1
U2121A-
2 U2931A
–01
Optional accessory
Ta b l e 1 1 RF switch driver board optional accessory
Ordering Options Description
1 Y1157A 9-to-10 pin extension cable for N181x — supplies to build 4 cables
Ordering Option
(as standalone)
U2931A–101 U2121A–101 RF switch driver board
–102 U2121A–101 RF switch driver board cable
Description
26 U2121A-101 Operating Guide
Appendix A: Control Instructions
NOTE
The COM driver minimum system requirements are as shown below.
Minimum System Requirements
PC hardware 450 MHz Pentium II or higher, 128 MB RAM, 40 GB hard disk
Operating system Windows
Software driver IVI-COM
space, CD-ROM drive.
®
XP Professional or Home Edition, Service Pack 1 or
later, Windows
®
2000 Professional, Service Pack 4 or later.
Compatible with
programming
environments
• Agilent VEE
• Microsoft
• Microsoft
• LabVIEW
®
Visual Studio.NET, C/C++
®
Visual Basic 6/7
Please adhere to the following instructions strictly to create the COM
driver.
To read digital input information.
1 When reading digital input, set the desired channel to ON (1) and
then read the target bit. Set the channel back to OFF (0) when the
information has been read.
2 Do not activate both Ch15 and Ch16 at the same time because this
will cause an excessive current flow; which will result in a sudden
temperature increase in the buffer IC and regulator IC.
Prolonged exposure to increased temperature will cause overheating in your buffer IC
and regulator IC.
U2121A-101 Operating Guide 29
To set digital output.
NOTE
1 To enable digital output control, set Ch14 to ON (1).
2 For channel 1 to channel 5, only activated one bit at a time. Do
not activate both bits together because this will damage your RF
switches.
3 Some RF switches will need pulse current control instead of
continuous current control. Please refer to the respective RF
switches' datasheets for more information. The wrong control
method will lead to RF switch damage.
• Prolonged exposure to a continuous supplied current will cause overheating in
your RF switch. Please ensure your devices temperatures are constantly
monitored when supplying continuous current.
• Refer to the Agilent U2121A-Based RF Switch Driver COM Object Help File for
more information.
30 U2121A-101 Operating Guide
Appendix B: Y1157A Cable Assembly Instructions
Distribution board Ribbon connector (10-pin) D-Sub connector (9-pin)
connector (10-pin)
The Y1157 A is a 10-pin ribbon connector to 9-pin D-Sub cable kit
which contains materials to build four cables.
The key to building the cables correctly is to understand the
orientation of the socket pins on the distribution boards and the pin
number orientation of the cable connectors. This orientation is shown
in Figure B-1. When using the D-sub connector, always refer to the
pin orientation shown in Figure B- 1. Do not use the pin numbers
printed on the part.
Figure B-1 Distribution board socket and Y1157A cable connector Orientation
The steps for building the cables are as follows:
1 Cut the ribbon cable slightly longer than the desired length.
2 Position the D-Sub connector and the ribbon cable connector as
shown in Figure B- 2. Route the cable through the connectors,
noting the location of cable pin 1. By convention, pin 1 is indicated
in red (the dark line in the drawing).
U2121A-101 Operating Guide 31
Strain relief
Pin 1 of ribbon cable
Align connector contacts
over cable lines
“Press” until metal contacts are no longer
visible (same for D-Sub connector)
Figure B-2 Y1157A connector orientation and ribbon cable routing
3 Move the connectors to the ends of the cable, allowing for some
overlap on the D- Sub connector end and strain relief on the ribbon
cable connector end. Note the orientation of the connectors and
cable in Figure B- 2.
4 Align the metal contacts of the ribbon connector over cable pin 1
(Figure B- 2) and the other pins, press the ribbon cable connector
onto the cable using a vise or clamp to press the contacts evenly
through the cable insulation. Continue to press the connector until
the metal contacts are no longer visible.
5 Fasten the strain relief clamp over the cable and into the ribbon
cable connector as shown in Figure B- 2. Remove any excess cable
after the clamp is in place.
6 Align the metal contacts of the D-Sub connector over cable pin 1
and the other pins, press the D- Sub connector onto the cable using
a vise or clamp to press the contacts evenly through the cable
insulation. Continue to press the connector until the metal contacts
are no longer visible. Remove any excess cable after the connector
is in place.
32 U2121A-101 Operating Guide
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Product specifications and descriptions in
this document are subject to change
without notice. Always refer to Agilent web
site for the latest revision.
© Agilent Technologies, Inc. 2008
Printed in Malaysia
Second Edition, June 6, 2008
U2931-90001
Agilent Technologies
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