Ametek 7230 User manual

Model 7230
DSP Lock-in Amplifier
Instruction Manual
198004-A-MNL-C
Copyright © 2017 AMETEK ADVANCED MEASUREMENT TECHNOLOGY, INC

Firmware Version
The instructions in this manual apply to operation of a Model 7230 DSP Lock-in Amplifier that is fitted with
Version 2.20 or later operating firmware. Users of instruments that are fitted with earlier firmware
versions can update them to the current version free of charge by downloading an Update Pack from our
website at www.signalrecovery.com The pack includes full instructions for use.
Trademarks
AMETEK® and the b® and alogos are registered trademarks of AMETEK, Inc
Other product and company names mentioned are trademarks or trade names of their respective
companies.
Company Names
SIGNAL RECOVERY is part of Advanced Measurement Technology, Inc, a division of AMETEK, Inc. It
includes the businesses formerly trading as EG&G Princeton Applied Research, EG&G Instruments
(Signal Recovery), EG&G Signal Recovery and PerkinElmer Instruments (Signal Recovery).

Table of Contents Table of Contents
i
General Safety Precautions..............................................................................................................vii
Chapter One, Introduction
1.1 How to Use This Manual.................................................................................................................................. 1-1
1.2 What is a Lock-in Amplifier?......................................................................................................................... 1-10
1.3 Key Specifications and Benefits .................................................................................................................... 1-16
Chapter Two, Installation and Initial Checks
2.1 Installation........................................................................................................................................................ 2-1
2.1.01 Introduction ............................................................................................................................................. 2-2
2.1.02 Rack Mounting........................................................................................................................................ 2-3
2.1.03 Inspection ................................................................................................................................................ 2-4
2.1.04 Line Cord Plug ........................................................................................................................................ 2-5
2.1.05 Line Voltage Selection............................................................................................................................ 2-6
2.2 Initial Checks.................................................................................................................................................... 2-7
2.2.01 Introduction ............................................................................................................................................. 2-7
2.2.02 Procedure............................................................................................................................................... 2-11
Chapter Three, Technical Description
3.1 Introduction ...................................................................................................................................................... 3-1
3.2 Operating Modes.............................................................................................................................................. 3-3
3.2.01 Introduction ............................................................................................................................................. 3-3
3.2.02 Single Reference / Dual Reference ......................................................................................................... 3-4
3.2.03 Tandem Demodulation............................................................................................................................ 3-7
3.2.04 Single Harmonic / Dual Harmonic.......................................................................................................... 3-9
3.2.05 Internal / External Reference Mode ...................................................................................................... 3-11
3.2.06 Virtual Reference Mode........................................................................................................................ 3-12
3.3 Principles of Operation................................................................................................................................... 3-16
3.3.01 Block Diagram....................................................................................................................................... 3-16
3.3.02 Signal Channel Inputs............................................................................................................................ 3-20
3.3.03 Line Frequency Rejection Filter............................................................................................................ 3-29
3.3.04 AC Gain and Dynamic Reserve............................................................................................................. 3-30
3.3.05 Anti-Aliasing Filter ............................................................................................................................... 3-42
3.3.06 Main Analog-to-Digital Converter........................................................................................................ 3-50
3.3.07 Reference Channel Inputs ..................................................................................................................... 3-53
3.3.08 Reference Channel ................................................................................................................................ 3-55
3.3.09 Phase-Shifter ......................................................................................................................................... 3-62
3.3.10 Internal Oscillator - General.................................................................................................................. 3-69
3.3.11 Internal Oscillator - Update Rate........................................................................................................... 3-70
3.3.12 Internal Oscillator - Frequency & Amplitude Sweeps .......................................................................... 3-71
3.3.13 Internal Oscillator - Voltage Control..................................................................................................... 3-77
3.3.14 Demodulators - Dual Phase Multipliers................................................................................................ 3-78
3.3.15 Demodulators - Output Filters............................................................................................................... 3-80

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ii
3.3.16 Fast Curve Buffer...................................................................................................................................3-87
3.3.17 Main Output Processor - General...........................................................................................................3-91
3.3.18 Main Output Processor - Output Offset and Expand.............................................................................3-93
3.3.19 Main Output Processor - Vector Magnitude and Phase.........................................................................3-94
3.3.20 Main Output Processor - Noise Measurements....................................................................................3-103
3.3.21 Main Output Processor - Standard Curve Buffer.................................................................................3-112
3.3.22 Analog Outputs (DACs).......................................................................................................................3-114
3.3.23 Auxiliary Analog Inputs (ADCs) .........................................................................................................3-119
3.3.24 Main Microprocessor - General...........................................................................................................3-121
3.3.25 Main Microprocessor - Auto Functions...............................................................................................3-123
3.4 General ..........................................................................................................................................................3-135
3.4.01 Accuracy...............................................................................................................................................3-136
3.4.02 Power-up Defaults................................................................................................................................3-137
Chapter Four, Front and Rear Panels
4.1 Front Panel ........................................................................................................................................................4-1
4.1.01 A and B (I) Signal Input Connectors........................................................................................................4-4
4.1.02 REF IN Connector....................................................................................................................................4-5
4.1.03 OSC OUT Connector ...............................................................................................................................4-6
4.1.04 STATUS Indicator ...................................................................................................................................4-7
4.2 Rear Panel .......................................................................................................................................................4-17
4.2.01 Power Input Connector...........................................................................................................................4-20
4.2.02 Power Switch..........................................................................................................................................4-21
4.2.03 DIGITAL I/O Connector........................................................................................................................4-22
4.2.04 RS232 Connector ...................................................................................................................................4-23
4.2.05 LAN Connector......................................................................................................................................4-25
4.2.06 USB Connector ......................................................................................................................................4-26
4.2.07 CONFIG Switches..................................................................................................................................4-27
4.2.08 SIG MON Connector..............................................................................................................................4-33
4.2.09 TRIG IN Connector................................................................................................................................4-34
4.2.10 TRIG OUT Connector............................................................................................................................4-35
4.2.11 ADC 1, ADC 2, Auto Measure ADC 3, and ADC 4 Connectors ..........................................................4-36
4.2.12 DAC 1, DAC 2, DAC 3, and DAC 4 Connectors ..................................................................................4-37
Chapter Five, Web Control Panel Operation
5.1 Introduction.......................................................................................................................................................5-1
5.2 Ethernet Connection Methods...........................................................................................................................5-3
5.2.01 Direct Wired Connection to a Single Computer......................................................................................5-4
5.2.02 Wireless Connection to an iPad, Tablet, Laptop, or Netbook Computer.................................................5-6
5.2.03 Wired Connection to a Company or Corporate Network Using a Static IP Address.............................5-29
5.2.04 Wired Connection to a Company or Corporate Network Using a DHCP Allocated IP Address...........5-46
5.3 Web Control Panels.........................................................................................................................................5-63
5.3.01 Main Controls: Overview.......................................................................................................................5-63
5.3.02 Main Controls: Display Indicators.........................................................................................................5-79
5.3.03 Main Controls: Input..............................................................................................................................5-87
5.3.04 Main Controls: Reference 1.................................................................................................................5-106
5.3.05 Main Controls: Oscillator.....................................................................................................................5-123
5.3.06 Main Controls: Output 1 ......................................................................................................................5-127

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iii
5.3.07 Main Controls: Reference 2 ................................................................................................................ 5-142
5.3.08 Main Controls: Output 2 ..................................................................................................................... 5-153
5.3.09 Main Controls: Output Filters ............................................................................................................. 5-163
5.3.10 Main Controls: Demodulator Control ................................................................................................. 5-167
5.3.11 Main Controls: Status Indicators......................................................................................................... 5-176
5.3.12 Oscillator: Overview ........................................................................................................................... 5-183
5.3.13 Oscillator: Sweep Control ................................................................................................................... 5-186
5.3.14 Oscillator: Modulation Control........................................................................................................... 5-199
5.3.15 Oscillator: Amplitude and Frequency Controls .................................................................................. 5-213
5.3.16 Rear Panel: Overview.......................................................................................................................... 5-216
5.3.17 Rear Panel: DACs ............................................................................................................................... 5-219
5.3.18 Rear Panel: ADCs ............................................................................................................................... 5-249
5.3.19 Rear Panel: RS232............................................................................................................................... 5-253
5.3.20 Rear Panel: Ref Mon........................................................................................................................... 5-261
5.3.21 Rear Panel: Expand ............................................................................................................................. 5-264
5.3.22 Rear Panel: Bind.................................................................................................................................. 5-268
5.3.23 Rear Panel: Digital Port....................................................................................................................... 5-271
5.3.24 Rear Panel: DIP switches .................................................................................................................... 5-275
5.3.25 Rear Panel: USB Status....................................................................................................................... 5-283
5.3.26 Equations: Overview........................................................................................................................... 5-286
5.3.27 Equations: Equation 1 and Equation 2................................................................................................ 5-289
5.3.28 Equations: Command Interface........................................................................................................... 5-301
5.3.29 Equations: Auto Default...................................................................................................................... 5-304
5.3.30 Equations: Auto Measure.................................................................................................................... 5-306
Chapter Six, Computer Operation
6.1 Introduction ...................................................................................................................................................... 6-1
6.2 Capabilities....................................................................................................................................................... 6-3
6.2.01 General .................................................................................................................................................... 6-3
6.2.02 Operation................................................................................................................................................. 6-4
6.2.03 Compound Commands............................................................................................................................ 6-6
6.3 RS232 Operation.............................................................................................................................................. 6-7
6.3.01 Introduction ............................................................................................................................................. 6-7
6.3.02 General Features...................................................................................................................................... 6-8
6.3.03 Choice of Baud Rate.............................................................................................................................. 6-14
6.3.04 Choice of Number of Data Bits............................................................................................................. 6-16
6.3.05 Choice of Parity Check Option ............................................................................................................. 6-17
6.3.06 Handshaking and Echoes....................................................................................................................... 6-19
6.3.07 Terminators ........................................................................................................................................... 6-25
6.3.08 Delimiters.............................................................................................................................................. 6-27
6.3.09 Status Byte, Prompts and Overload Byte.............................................................................................. 6-29
6.4 USB Operation ............................................................................................................................................... 6-37
6.4.01 Introduction ........................................................................................................................................... 6-37
6.4.02 General Features.................................................................................................................................... 6-40
6.4.03 Terminator, Status Byte, and Overload Byte ........................................................................................ 6-41
6.4.04 Delimiters.............................................................................................................................................. 6-48
6.5 Ethernet Operation ......................................................................................................................................... 6-49
6.5.01 Introduction ........................................................................................................................................... 6-49
6.5.02 IP Address ............................................................................................................................................. 6-50
6.5.03 Main Controls........................................................................................................................................ 6-51

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iv
6.5.04 Sockets ...................................................................................................................................................6-52
6.5.05 Terminator, Status Byte, and Overload Byte .........................................................................................6-54
6.5.06 Delimiters...............................................................................................................................................6-61
6.7 Command Descriptions...................................................................................................................................6-70
6.7.01 Signal Channel .......................................................................................................................................6-71
6.7.02 Reference Channel .................................................................................................................................6-93
6.7.03 Signal Channel Output Filters..............................................................................................................6-112
6.7.04 Signal Channel Output Amplifiers.......................................................................................................6-125
6.7.05 Instrument Outputs...............................................................................................................................6-132
6.7.06 Internal Oscillator.................................................................................................................................6-157
6.7.07 Analog Outputs ....................................................................................................................................6-187
6.7.08 Digital I/O ............................................................................................................................................6-198
6.7.09 Auxiliary Inputs....................................................................................................................................6-204
6.7.10 Output Data Curve Buffer....................................................................................................................6-207
6.7.11 Computer Interfaces.............................................................................................................................6-266
6.7.12 Instrument Identification......................................................................................................................6-287
6.7.13 Auto Default and Calibration...............................................................................................................6-291
6.7.14 Dual Mode Commands........................................................................................................................6-295
6.5 Programming Examples ................................................................................................................................6-304
6.5.01 Introduction..........................................................................................................................................6-304
6.5.02 Basic Signal Recovery .........................................................................................................................6-305
6.5.03 Frequency Response Measurement......................................................................................................6-310
6.5.04 X and Y Output Curve Storage Measurement .....................................................................................6-315
Appendix A, Specifications
Appendix B, Pinouts
B1 RS232 Connector Pinout .................................................................................................................................B-1
B2 Digital I/O Port Connector ...............................................................................................................................B-1
Appendix C, Cable Diagrams
C1 RS232 Cable Diagrams......................................................................................................................................C1
Appendix D, Default Settings
Auto Default Function.............................................................................................................................................D1
Appendix E, Alphabetical Listing of Commands
Index
Warranty...................................................................................................................................... End of Manual

TABLE OF CONTENTS
v
GENERAL SAFETY PRECAUTIONS
The equipment described in this manual has been designed in accordance with EN61010 "Safety
requirements for electrical equipment for measurement, control and laboratory use", and has been
supplied in a safe condition. To avoid injury to an operator or service technician the safety precautions
given below, and throughout the manual, must be strictly adhered to, whenever the equipment is
operated, serviced or repaired. For specific safety details, please refer to the relevant sections within
the manual.
The equipment is intended solely for electronic measurement and should be used for no other purpose.
SIGNAL RECOVERY accepts no responsibility for accidents or damage resulting from any failure to
comply with these precautions.
Grounding
To minimize the hazard of electrical shock, it is essential that the equipment be connected to a
protective ground through the AC supply cable. The continuity of the ground connection should be
checked periodically.
AC Supply Voltage
Never operate the equipment from a line voltage or frequency in excess of that specified. Otherwise,
the insulation of internal components may break down and cause excessive leakage currents.
Fuses
Before switching on the equipment check that the fuses accessible from the exterior of the equipment
are of the correct rating. The rating of the AC line fuse must be in accordance with the voltage of the
AC supply.
Should any fuse continually blow, do not insert a fuse of a higher rating. Switch the equipment off,
clearly label it "unserviceable" and inform a service technician.
Explosive Atmospheres
This equipment must NEVER BE OPERATED in a potentially explosive atmosphere. The equipment is
NOT designed for use in these conditions and could possibly cause an explosion.
Safety Symbols
For the guidance and protection of the user, the following safety symbols may appear on the
equipment, together with details of the hazard where appropriate:
Symbol
Meaning
General safety hazard. Refer to the operating manual for detailed instructions.
Electrical safety hazard. This symbol may appear alongside the general safety
hazard symbol, together with a voltage.
Notes and Cautions
For the guidance and protection of the user, Notes and Cautions appear throughout the manual. The
significance of these is as follows:
NOTES highlight important information for the reader’s special attention.
CAUTIONS guide the reader in avoiding damage to the equipment.

TABLE OF CONTENTS
vi
Avoid Unsafe Equipment
The equipment may be unsafe if any of the following statements apply:
Equipment shows visible damage.
Equipment has failed to perform an intended operation.
Equipment has been stored in unfavorable conditions.
Equipment has been subjected to severe physical stress.
If in any doubt as to the serviceability of the equipment, don't use it. Get it properly checked out by a
qualified service technician.
Live Conductors
When the equipment is connected to its measurement inputs or supply, the opening of covers or
removal of parts could expose live conductors. The equipment must be disconnected from all power
and signal sources before it is opened for any adjustment, replacement, maintenance or repair.
Adjustments, maintenance or repair must only be done by qualified personnel, who should refer to the
relevant maintenance documentation.
Equipment Modification
To avoid introducing safety hazards, never install non-standard parts in the equipment, or make any
unauthorized modification. To maintain safety, always return the equipment to your
SIGNAL RECOVERY service provider for service and repair.
European WEEE Directive
This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the
European Union on waste electrical and electronic equipment (WEEE) and, in jurisdictions adopting
that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed
of as unsorted municipal waste. Please use your local WEEE collection facilities for the disposal of this
product and otherwise observe all applicable requirements.
FCC Notice
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with this instruction manual, may cause harmful interference with radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference, in which case
the user is required to correct the interference at his own expense.
Acknowledgment
Operation of the Ethernet interface in the model 7230 relies on software code developed by the
Swedish Institute of Computer Science, copyright 2001-2004, all rights reserved. In accordance with
the license under which it is used, we reproduce here the following disclaimer:
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

TABLE OF CONTENTS
vii
DECLARATION OF CONFORMITY
The directives covered by this declaration
73/23/EEC Low Voltage Equipment Directive, amended by 93/68/EEC
89/336/EEC Electromagnetic Compatibility Directive, amended by 92/31/EEC
& 93/68/EEC
Product(s)
Model 7230 DSP Lock-in Amplifier
Basis on which conformity is being declared
The product(s) identified above comply with the requirements of the EU directives by
meeting the following standards:
BS EN61326-1:2006 Electrical equipment for measurement control and laboratory use -
EMC requirements –Class A.
BS EN61010-1:2001 Safety requirements for electrical equipment for measurement,
control and laboratory use.
Accordingly the CE mark has been applied to this product.
Signed
For and on behalf of SIGNAL RECOVERY
Authority: Business Element Manager
Date: November 2010

Introduction Chapter 1
1-1
1.1 How to Use This Manual
This manual gives detailed instructions for setting up and operating the
SIGNAL RECOVERY Model 7230 DSP Lock-in Amplifier. It is split into the
following chapters:-
Chapter 1 - Introduction
Provides an introduction to the manual, briefly describes the function of a lock-in
amplifier and the types of measurements it may be used for, and lists the major
specifications of the model 7230.
Chapter 2 - Installation and Initial Checks
Describes how to install the instrument and gives a simple test procedure which may
be used to check that the unit has arrived in full working order.
Chapter 3 - Technical Description
Provides an outline description of the design of the instrument and discusses the
effect of the various controls. A good understanding of the design will enable the
user to get the best possible performance from the unit.
Chapter 4 - Front and Rear Panels
Describes the instrument’s connectors and indicator as referred to in the subsequent
chapters.
Chapter 5 - Web Control Panel Operation
Describes the capabilities of the instrument when operated via the built-in web
control panels.
Chapter 6 - Computer Operation
This chapter provides detailed information on operating the instrument from a
computer via the built-in interfaces. It includes information on how to establish
communications, the functions available, the command syntax and a detailed
command listing.
Appendix A
Gives the detailed specifications of the unit.
Appendix B
Details the pinouts of the multi-way connectors on the rear panel of the unit.
Appendix C
Shows the connection diagrams for suitable RS232 null-modem cables to couple the
unit to a compatible computer.
Appendix D
Provides a listing of the instrument settings produced by using the Auto-Default
functions.
Appendix E
Gives an alphabetical listing of the computer commands for easy reference.
New users are recommended to unpack the instrument and carry out the procedure in
chapter 2 to check that it is working satisfactorily. They should then make
themselves familiar with the information in chapters 3, 4 and 5, even if they intend
that the unit will eventually be used under computer control. Only when they are

Chapter 1, INTRODUCTION
1-2
fully conversant with operation from the front panel should they then turn to chapter
6 for information on how to use the instrument remotely. Once the structure of the
computer commands is familiar, appendix E will prove convenient as it provides a
complete alphabetical listing of these commands in a single easy-to-use section.
1.2 What is a Lock-in Amplifier?
Since their invention back in the 1960's, lock-in amplifiers have been used whenever
the need arises to measure the amplitude and/or phase of a signal of known
frequency in the presence of noise. Unlike other AC measuring instruments they
have the ability to give accurate results even when the noise is much larger than the
signal - in favorable conditions even up to a million times larger.
Early instruments used analog technology, with manual controls and switches, and
with output readings being taken from large panel meters. Later, microprocessors
were added to give more user-friendly operation, digital output displays, and to
support computer control. More recently the analog phase sensitive detectors
forming the heart of the instrument have been replaced by DSP (digital signal
processing) designs, further improving performance.
The model 7230 DSP lock-in amplifier uses the latest DSP technology for signal
detection, and a powerful processor for easy user operation. The low-noise analog
signal channel, with its choice of input mode and impedance, complements the
digital technology, giving an instrument that will be of use in many fields of
scientific research, such as optics, electrochemistry, materials science, fundamental
physics and electrical engineering.
In these and other experiments it can function as a:-
AC Signal Recovery Instrument Transient Recorder
Vector Voltmeter DSP Oscillator
Phase Meter Frequency Meter
Spectrum Analyzer Noise Measurement Unit
These characteristics, all available in a single compact console, make it an invaluable
addition to any laboratory.

Chapter 1, INTRODUCTION
1-3
1.3 Key Specifications and Benefits
The SIGNAL RECOVERY Model 7230 represents a further significant advance in
the application of DSP technology in the design of a lock-in amplifier.
Key specifications include:
Frequency range:
Standard unit 0.001 Hz to 120.000 kHz
With 7230/99 option 0.001 Hz to 250.000 kHz
Voltage sensitivity: 10 nV to 1 V full-scale
Current input mode sensitivities: 10 fA to 1 µA full-scale
10 fA to 10 nA full-scale
Line frequency rejection filter
Dual phase demodulator with X-Y and R-outputs
Very low phase noise of < 0.0001°rms
Output time constant: 10 µs to 100 ks
5-digit output readings
Dual reference mode - allows simultaneous measurement of two signals at
different reference frequencies
Single and dual harmonic mode - allows simultaneous measurement of up to two
different harmonics of a signal
Tandem demodulation capability - suitable for double demodulation experiments
that would otherwise require two lock-in amplifiers
Virtual reference mode - allows reference free measurements
Direct Digital Synthesizer (DDS) oscillator with variable amplitude and
frequency
Oscillator frequency and amplitude sweep generator
Voltage controlled oscillator frequency or amplitude
8-bit programmable digital I/O port for external system control
Four configurable DAC outputs which can be used as analog signal outputs
and/or as auxiliary DAC outputs
Four auxiliary ADC inputs
Full range of auto functions
Standard USB, Ethernet, and RS232 interfaces
100,000 point internal curve storage buffer

Chapter 1, INTRODUCTION
1-4

Installation and
Initial Checks Chapter 2
2-1
2.1 Installation
2.1.01 Introduction
Installation of the model 7230 is very straightforward. The instrument can be
operated on almost any laboratory bench or be rack mounted at the user's
convenience. With an ambient operating temperature range of 0 C to 35 C, it is
highly tolerant to environmental variables, needing only to be protected from
exposure to corrosive agents and liquids.
The model 7230 does not use forced-air ventilation; however it should be located so
that there is reasonable flow of air around it to aid cooling.
2.1.02 Rack Mounting
An optional accessory kit, part number K02006, is available from
SIGNAL RECOVERY to allow the model 7230 to be mounted in a standard 19-inch
rack.
2.1.03 Inspection
Upon receipt the model 7230 Lock-in Amplifier should be inspected for shipping
damage. If any is noted, SIGNAL RECOVERY should be notified immediately and
a claim filed with the carrier. The shipping container should be saved for inspection
by the carrier.
2.1.04 Line Cord Plug
The model 7230 is powered from the model PS0110 remote power module that in
turn is fitted with a standard IEC 320 input socket. A suitable line power cord is
supplied.
2.1.05 Line Voltage Selection
The model PS0110 is suitable for line voltages in the range 100 - 240 V AC, 47 -
63 Hz, and no adjustment is needed to accommodate this range. It is internally
protected against short circuit and overload and in the event of failure cannot be
repaired and must be replaced.
2.2 Initial Checks
2.2.01 Introduction
The following procedure checks the performance of the model 7230. In general, this
procedure should be carried out after inspecting the instrument for obvious shipping
damage.
NOTE: Any damage must be reported to the carrier and to SIGNAL RECOVERY
immediately. In addition the shipping container must be retained for inspection by
the carrier.
Note that this procedure is intended to demonstrate that the instrument has arrived in

Chapter 2, INSTALLATION AND INITIAL CHECKS
2-2
good working order, not that it meets specifications. Each instrument receives a
careful and thorough checkout before leaving the factory, and normally, if no
shipping damage has occurred, will perform within the limits of the quoted
specifications. If any problems are encountered in carrying out these checks, contact
SIGNAL RECOVERY or the nearest authorized representative for assistance.
The procedure requires the use of a computer with an Ethernet 10 or 100 Base T
adaptor with RJ45 connector set to support TCP/IP protocol with an installed web
browser. As an example, a Windows 7 PC with Internet Explorer 11 is suitable, but
so are many other computer systems.
2.2.02 Procedure
1) Check that the rear panel Config 1 and Config 2 switches are set to 0. This will
set the model 7230 to use the default static IP address of 169.254.150.230
2) Close all open programs on the computer and unplug any existing network
connection. Disable any wireless connection as well.
3) Plug one end of the supplied RJ45 patch cord to the computer and the other end
into the LAN connector on the rear panel of the model 7230
5) With the rear-panel mounted power switch set to 0(off), plug the line cord into
the model PS0110 power supply unit and the 5-pin DIN plug on the power cable
from the PS0110 to the 7230’s rear panel POWER INPUT connector.
6) Turn on the model 7230. The front panel status light should be green.
7) Open a browser session on the computer. Since there is no connection to the
internet you will not see the normal opening page, but an error message. If using
Internet Explorer on Windows 10 the message will be as shown in figure 2-2;
other browsers will generate similar messages.
Figure 2-2, Initial Browser Window
8) Type 169.254.150.230 into the address bar and press <return>. The 7230's Main
Controls panel should be displayed, as shown below in figure 2-3.

Chapter 2, INSTALLATION AND INITIAL CHECKS
2-3
Figure 2-3, Model 7230 Main Controls Panel
9) Click the Equations tab, to show the Equations panel, as shown below in figure
2-4
Figure 2-4, Model 7230 Equations Panel
10) Click the Auto Default button. This will set all instrument controls to the factory
default values,
11) Connect a BNC cable from the front panel OSC OUT to the Ainput connector
on the front panel. The X1 and Magnitude outputs should read 100 ± 1%, and the
Y1 and Phase 1 outputs should read close to zero, as shown in figure 2-5 below.

Chapter 2, INSTALLATION AND INITIAL CHECKS
2-4
Figure 2-5, Model 7230 Main Controls Panel –Default Settings
12) Save the address as a favorite, bookmark, or shortcut (figure 2-6) so that you can
quickly reach the model 7230 again if repeating the test, as in figure 2-7
Figure 2-6, Saving the Model 7230’s IP address as a favorite

Chapter 2, INSTALLATION AND INITIAL CHECKS
2-5
Figure 2-7, Accessing the favorite
13) This completes the initial checks. Even though the procedure leaves many
functions untested, if the indicated results were obtained then the user can be
reasonably sure that the unit incurred no hidden damage in shipment and is in
good working order.

Chapter 2, INSTALLATION AND INITIAL CHECKS
2-6