System Two Getting Started Guide
Contents
1. ITEM A P NUMBER JESURIPTIUN I L 0 0eVe RACK EAR BRACKET J1 0 05801 RACK EAR BRACKET L 3 9113 1110 6 SCREW 6 32 9 16 MC FLT PH DGY 4 SCREW H10 328X5 16 MI miss FA aS LIDE SIATIDNARY SECTION 6 3 U0 0006 HAND J114 1108 CREW MC FLT PH ZN 8 32 1 4 52 Getting Started with Cascade Plus Rack Mounting Chapter 3 Hardware Installation Checking or Changing Power Line Voltage Figure 46 Changing power line voltage The AC Mains input to each instrument is made through a connector fuse block voltage selector assembly Before connecting the power cord confirm that the input voltage selection is correct for your power source An indicator pin shows the selected input voltage in one of the four holes in the cover see Figure 46 To change the input voltage refer to Figure 46 and proceed as follows 1 Remove the AC power cord from the AC Mains Connector 2 Open the cover using a small blade screwdriver or similar tool Set aside the cover fuse block assembly 3 Pull the voltage selector card straight out of the housing using the indicator pin Voltage Selector Card Orientations 90 Figure 47 Voltage se2. reguency 09717788 16 50 20 Audio Precision INT GETTING STARTED WITH SYSTEM Two CASCADE PLUS a 8 aooooooooooooooocooocooog C DataBits Error Flags confidence lock coding panty Jitter Generation a a a Ott Jitter Measurement C Ul Sed Pk Avg WE Audio precision Getting Started with System Two Cascade Plus An Introductory Guide to System Two Cascade Plus September 2002 Copyright 2002 Audio Precision Inc All rights reserved Part Number 8211 0142 Revision O No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or by any information storage and retrieval system without permission in writing from the publisher Audio Precision System One System Two System Two Cascade System Two Cascade Plus System One DSP System Two DSP Dual Domain FASTTEST and APWIN are trademarks of Audio Precision Inc Windows is a trademark of Microsoft Corporation Published by Audio Precision 5750 SW Arctic Drive Beaverton Oregon 97005 Tel 503 627 0832 Fax 503 641 2209 U S Toll Free 1 800 231 7350 e mail info audioprecision com Web audioprecision com precision Printed in the United States of America This mark signifies that the product conforms to all appl
3. 68 Running a Test 70 Running a Saved Test 72 Using the Quick Launch 74 Moving ON 2 00000 2 eee eee 76 APWIN 76 Technical Support aoaaa a a a 77 Chapter 6 Supplemental Information 79 79 Automating APWIN 82 Windows 95 98 2000 82 Getting Started with Cascade Plus Command Line Options and Switches Using Printers with APWIN 0 Publishing 5 Getting Started with Cascade Plus Getting Started with Cascade Plus Safety Information Do NOT service or repair this product unless properly qualified Servicing should be performed only by a qualified technician or an authorized Audio Precision distributor Do NOT defeat the safety ground connection This product is designed to operate only from a 50 60 Hz AC power source 250 V rms maximum with an approved three conductor power cord and safety grounding Loss of the protective grounding connection can result in electrical shock hazard from the accessible conductive surfaces of this product For continued fire hazard protection fuses should be replaced ONLY with the exact value and type indicated on the rear panel of the in
4. inputs and outputs in AES EBU SPDIF EIAJ optical parallel general purpose serial formats and complete serial interface analysis per AES3 These features give the 2722 Series the capability of providing stimulus and measurement in any combination of digital and analog domains m The SYS 2700 The 2700 Series has the same digital capabilities of 2722 Series above but no analog capabilities m The SYS 2122 The 2122 Series has the same analog capabilities of 2622 Series and 2722 Series above but no DSP or diaital capabilities The models described above have a model number suffix of A or G The A denotes that the instrument is APIB controlled with APWIN software the G denotes that the instrument has a GPIB IEEE 488 interface in addition to the APIB interface See GPIB G Option below System Two Cascade Plus APIB versions are available with an ISA bus interface card a PCI bus interface card or for use with a notebook computer a type II PCMCIA interface adapter Each of these cards comes with the appropriate APIB Audio Precision Interface Bus cable to interconnect the computer to Cascade Plus GPIB G Option System Two Cascade Plus G with GPIB option supports all of the System Two Cascade Plus configurations as well as the SWR switchers and the DCX 127 Multi function Interface No accessories or measurement software are provided with the instrument An optio
5. identifies the model number the options and filters installed and the date of manufacture SYS 2122 2 Pus Analog Only System Two SYS 2622 lt cus SYS 2722 55555 Dual Domain anazo ave 000000 System Two ff SYS 2700 5 ate of Manufacture TEENS S JH a Getting Started with Cascade Plus Overview Chapter 1 Introduction Switchers P _ ME MET T P a dnb d dw dw Gad Ga dS Z5 2 E Cu BER A eC lt 9 oe 2 9 gt 7 SWR 2122 om pe y pe 7B 10 3 Pe 3 UR ds ERN UR 4 lt Figure 1 SWR 2122 Switchers The four versions of switchers are described below Each features 12 x 2 architecture with provisions for cascading up to 16 units allowing up to 192 channels to be accessed Switching is computer controlled via the same APIB as the Cascade Plus See Chapter 3 for further information a SWR 2122M Output Switcher Routes either of the two generator output channels A amp B to any of 12 channels Uses male XLR connectors for balanced signals Complement mode allows all but one channel to be driven while measuring the undriven channel for worst case crosstalk on multichannel devices SWR 2122F Input Switcher Routes either of the two analyzer input channels A amp B from any of 12 channels Uses female XLR connectors for balanced signals a SWR 2122U Unbalanced S
6. offset and scaled by the software The two independently programmable dc sources have a 10 5 V bipolar range with 20 mV resolution and monotonicity to 40 mV 19 bits The software can sweep either dc source The DCX 127 also contains a simplified 8 bit program control interface that can be defined to execute any pre defined keystroke sequence This can be used to run different software procedures based upon switch closures 6 Getting Started with Cascade Plus Overview Chapter 1 Introduction PSIA 2722 Programmable Serial Interface Adapter Figure 3 PSIA 2722 Programmable Serial Interface Adapter The PSIA 2722 Programmable Serial Interface Adapter provides a means of interfacing System Two Cascade or Cascade Plus to a variety of data acquisition reconstruction and communication hardware that use a serial bus for data exchange This greatly increases the system s flexibility in interfacing to serial systems for a wide range of tests and measurements The PSIA consists of a parallel to serial transmitter and an independent serial to parallel receiver under APWIN software control A serial interface adapter such as PSIA 2722 is required to transmit or receive digital signals and associated clock inputs and outputs for the non AES3 IEC60958 serial digital audio formats often encountered in telecommunications and in converter design and testing The settings necessary to configure the PSIA are easily accomplished in software and co
7. d for digital audio connections using the AES EBU format XLR connectors 110 Q cable double shielded for improved EMI performance m CAB AES Set of two AES EBU cables 39 in 1 m long See Figure 40 m CAB AES2 Set of two AES EBU cables 6 5 ft 2 m long m CAB AES4 Set of two AES EBU cables 13 ft 4 m long m CAB DIO Set of two interface cables 4 25 ft 1 3 m long to connect between the SYS 2722 rear panel 50 pin ribbon input output connectors to a DUT fixture with 0 1 in spaced 2 x 25 headers See Figure 41 48 Getting Started with Cascade Plus Digital Audio Cables Chapter 2 Specifications Figure 41 CAB DIO cables Cable Adapters m CAD RCA set of 14 RCA Phono female to BNC male adapters intended primarily for use with the SWR 2122U Unbalanced Switcher Digital Control APIB Cables These cables can be used as extensions or replacements for the APIB cables that come with each switcher or DCX 127 m CAB DO Extension APIB Interface cable 20 in 0 5 m m CAB D2 Extension APIB Interface cable 6 5 ft 2 m m CAB D6 Extension APIB Interface cable 12 7 ft 6 m Getting Started with Cascade Plus 49 Chapter 2 Specifications Digital Audio Cables 50 Getting Started with Cascade Plus Hardware Installation For table top use the System Two Cascade Plus can be stacked with switchers or other instruments Rack Mounting There are two styles of rack mount kits available to rack mount Ca
8. damage equipment If you see this marked on equipment refer to the Operator s Manual or User s Manual for precautionary instructions FUNCTIONAL EARTH TERMINAL A terminal marked with this symbol is electrically connected to a reference point of a measuring circuit or output and is intended to be earthed for any functional purpose other than safety PROTECTIVE EARTH TERMINAL A terminal marked with this symbol is bonded to conductive parts of the instrument and is intended to be connected to an external protective earthing system Disclaimer Audio Precision cautions against using their products in a manner not specified by the manufacturer To do otherwise may void any warranties damage equipment or pose a safety risk to personnel Getting Started with Cascade Plus Introduction Scope of This Manual This guide serves several purposes It describes several basic hardware considerations for installing the components such as power line voltage settings fuse information APIB interface cable connections and jumper and DIP switch settings It contains full specifications for the System Two Cascade Plus and its options A list and a brief description of other Cascade Plus documents follows Related Documentation The APWIN User s Manual for System Two Cascade in conjunction with the APWIN 2 22 Addendum contain a comprehensive description of the full capabilities of APWIN software for System Two Cascad
9. e Plus AP Basic Language Reference the AP Basic Language Extensions for System Two Cascade and the APWIN 2 22 Addendum together provide detailed descriptions and syntax for all OLE commands used in APWIN automation The System Two Cascade Plus Service Manual contains detailed Cascade Plus information including adjustment procedures diagnostic procedures and drawings of electrical and mechanical parts This manual is not required for routine understanding or operation and must be purchased separately Getting Started with Cascade Plus 1 Chapter 1 Introduction Overview Overview General System System Two Cascade Plus is an audio test set with broad high performance capabilities for analog digital and mixed domain devices Cascade Plus includes both signal generation and analysis capability for audio stimulus response testing Virtually all common and many specialized tests are performed on analog domain and digital domain signals and on the digital interface signal pulse train itself Control of the Cascade Plus is via software running on a Windows based personal computer The versatility of Cascade Plus can be extended through major options and accessories The SWR 2122 series of Audio Switchers are available in input output and insertion patch point versions The DCX 127 adds dc measurement and digital generation capabilities The PSIA 2722 Programmable Serial Interface Adapter converts the Cascade Plus parallel p
10. ge 10 Hz 204 kHz Frequency Accuracy High accuracy mode 0 03 Fast mode 0 5 i 200 Q 2 Q with option EURZ NP0020 0001 000 R3 Getting Started with Cascade Plus Cables and Adapters Chapter 2 Specifications Cables and Adapters Analog Audio Cables These cables provide a convenient method to connect Audio Precision measurement equipment with a device under test These cable kits consist of four cables each with a unique color band at the connector ends to facilitate identification The cables are high quality Mogami NEGLEX super flexible shielded cable and are 8 ft 2 4 m long The cables and connector shells are satin black and all connectors have gold plated contacts m CAB XMF consists of a set of four XLR male to XLR female cables CAB XBR consists of a set of four cables two with RCA PHONO male to XLR male connectors and two with RCA PHONO male to XLR female connectors Also provided are four adapters from RCA female to BNC male The cables are wired with pin 2 of the XLR connector as hot center pin of the RCA connector and pins 1 and 3 connected to ground and shield to agree with the unbalanced wiring convention of Audio Precision instruments See Figures 38 and 39 Figure 38 CAB XBR cable kit Getting Started with Cascade Plus 47 Chapter 2 Specifications Digital Audio Cables Shield Figure 39 XLR to BNC wiring Digital Audio Cables Figure 40 CAB AES cable set These cables are designe
11. icable requirements of the European Community A Declaration of Conformance is included with the user information that describes the specifications used to demonstrate conformity 110909094355 Safety Information V Safety 5 5 5 vi vi Chapter 1 1 Scope of This 1 Related 1 OVEIVIEW o o o Loewe ow 2 General System 2 System Two Cascade Plus 2 GPIB 67 ODUION 422 z a we CE REE HS 3 Additional Options for System Two Cascade Plus 3 Switchers ls 5 DCX 127 Multi Function Module 6 PSIA 2722 Programmable Serial Interface Adapter 7 Chapter 2 5 9 Analog 510 9 D A Generated Analog Signals 13 Analog Analyzer 16 Option 21 Option 5 5177 26 DSP Analysis of Analog Signals 27 Digital Signal 32 AES EBU Interface Generation 36 Getting Started with Cascade Plus Digital Analyzer llle 58 Graphs
12. lector card positions 4 Orient the selector card so that the desired input voltage is readable at the bottom see Figure 47 Then orient the indicator pin to point Getting Started with Cascade Plus 53 Chapter 3 Hardware Installation Rack Mounting up when the desired voltage is readable at the bottom with the indicator pin assembly seated in the notch on the board edge 5 Insert the voltage selector card into the housing with the printed side of the card facing toward the connector and the edge indicating the desired voltage first 6 Confirm that the correct fuse is installed for the intended input voltage refer to fuse ratings marked on the rear panel If necessary change the fuse type as described in the following section 7 Replace the cover and verify that the indicator pin shows the desired voltage Fuse Information The connector fuse block voltage selector assembly allows two fusing arrangements North American see Figure 48 and European see Figure 49 The North American fusing arrangement uses a single type 3AG 0 25 x 1 25 in SB slow blow fuse the European fusing arrangement uses two 5 x 20 mm IEC approved type T fuses Refer to the label on the rear panel for fuse current ratings Jumper bar ER A Fuse block gt Cover gt 100 120 V Orientation Figure 48 North American fusing arrangement 230 240 V Orientation Figure 49 European fusing arrangement 54 Getting Started wi
13. nal GPIB software development kit is available for the versions that includes sample files utilities the System Two Cascade Plus GPIB Programmer s Reference Manual and APWIN software for test development Contact your distributor or go to the Audio Precision Web site at audioprecision com for more information about System Two Cascade Plus with GPIB Additional Options for System Two Cascade Plus These analog options may be installed in your System Two Cascade Plus mg S2 IMD Adds the IMD InterModulation Distortion generator and IMD analyzer Getting Started with Cascade Plus 3 Chapter 1 Introduction Overview a S2 W amp F Adds the wow and flutter analyzer a S2 BUR Adds the tone burst square wave and noise generator m S2 EURZ Changes the generator output selections to 40 200 600 prevalent in Europe m S AES17 Adds a special filter option for THD N and small signal measurement of DAC output in conformance with the AES17 standard Additionally your Cascade Plus may include up to seven optional hardware filters or may include custom filters Commonly installed filters include FIL AWT A weighting filter a FIL CWT C weighting filter a FIL CCR IEC468 3 CCIR weighting filter Approximately 50 other Audio Precision option filters are available Visit the Audio Precision Web site at audioprecision com to view the current filter offerings A rear panel configuration label on the Cascade Plus
14. ng Started with Cascade Plus Running Your First Tests Chapter 5 Getting Started with APWIN Equipment Under Test First we will run a test manually then load a saved test and finally use the Quick Launch toolbar Use balanced or unbalanced connections between your equipment and System Two Cascade Plus as appropriate Most professional and broadcast audio equipment uses balanced connections high and low audio signal lines plus ground for each channel with XLR connectors most consumer audio equipment uses unbalanced connections a high audio signal line plus ground which also carries the audio low signal with 1 4 phone RCA or 3 5 mm mini jacks System Two Cascade Plus uses both XLR and banana connectors connected in parallel with both active in the balanced configuration to carry its balanced inputs and outputs Unbalanced inputs and outputs are carried on BNC connectors The balanced and unbalanced designations on System Two Cascade Plus are mutually exclusive You must select one or the other for each input and output Figure 68 shows some common cable hookups d Figure 68 Typical balanced and unbalanced connections Getting Started with Cascade Plus 69
15. nverter specific setups can be saved reloaded or downloaded from the Web PSIA 2722 requires APWIN version 2 22 or later software Getting Started with Cascade Plus 7 Chapter 1 Introduction Overview 8 Getting Started with Cascade Plus Specifications Analog Signal Outputs All System Two Cascade Plus configurations except SYS 2700 contain an ultra low distortion analog sine wave generator and two independent transformer coupled output stages The SYS 2622 and SYS 2722 configurations also contain a dual channel D A signal generator for enhanced capabilities Option BUR adds analog generated sine burst square wave and noise signals Option IMD adds analog generated IMD test signals Unless otherwise noted all specifications are valid only for outputs 2150 uVrms 420 uVppl Analog Output Characteristics Source Configuration Selectable balanced unbalanced or CMTST common mode test Source Impedances Balanced or CMTST 40 Q 1 Q 150 Q 1 5 or 600 3 Unbalanced 20 Q 1 2 or 600 Q 3 Q Max Floating Voltage 42 Vpk outputs are isolated from each other Output Current Limit Typically gt 80 mA Max Output Power into 600 Q Balanced 30 1 dBm Rs 40 Q Unbalanced 24 4 dBm Rs 20 Q Output Related Crosstalk 10 Hz 20 kHz lt 120 dB or 5 uV whichever is greater 20 kHz 100 kHz lt 106 dB or 10 uV whichever is greater Low Distortion Sine Wave Generator Frequency Ran
16. of Typical Digital Domain Performance 43 Auxiliary Signals 44 Audio Monitor ler 45 46 Cables and 47 Analog Audio 47 Digital Audio 5 48 Cable 49 Digital Control APIB 49 Chapter 3 Hardware Installation 51 Rack Mounting e 51 Fixed Rack Mounting Brackets 51 Sliding Rack Mounting Brackets 52 Checking or Changing Power Line Voltage 53 Fuse 54 Changing Fusing Arrangement 55 55 Connecting Cascade Plus to YourPC 56 Installing the ISA WIN Card 56 ISA Card Address Jumper Settings 57 Installing PCI WIN 57 Using the PCM WIN PCMCIA Interface Card 58 Connecting the APIB Interface 59 Chapter 4 Software Installation 61 Using the PCM WIN card with Windows 950rNT 66 Chapter 5 Getting Started with APWIN 67 Running Your First 5
17. orts to a wide variety of serial digital interface formats These accessories are described in greater detail in the following subsections Cascade Plus and its accessories are controlled by APWIN Audio Precision s user interface and software package which must be installed in the user s personal computer the computer is not included Alternatively Cascade Plus may be ordered with GPIB capability and may be controlled by GPIB software See GPIB G Option on the next page Specifications for the System Two Cascade Plus and its accessories are found in Chapter 2 System Two Cascade Plus System Two Cascade Plus audio test equipment provides stimulus and measurement capability The Cascade Plus family includes the following product configurations mg The SYS 2622 The 2622 Series is based on the advanced Cascade Plus platform It provides analog stimulus and measurement capability using newly improved analog circuits for signal generation filtering and measurement It also has a dual channel DSP analyzer and dual channel DAC signal source Its enhanced capability includes digital sianal aeneration high resolution spectrum analysis via FFT waveform capture and display and fast multitone testing m The SYS 2722 The 2722 Series is the Dual Domain product in the Cascade Plus family It includes the capabilities of the 2622 series plus digital audio 2 Getting Started with Cascade Plus Overview Chapter 1 Introduction
18. out APWIN System Two Cascade Plus and all the options available see the APWIN User s Manual or APWIN Help If you haven t done so yet unpack and install the System Two Cascade Plus and APWIN software and hardware components To mount the APIB interface card see Chapter 3 To install APWIN software on your computer see Chapter 4 Turn on System Two Cascade Plus with the rocker switch on the front panel The blue POWER indicator will light and you will hear a brief clatter of relay switches from within the unit Now launch APWIN on your computer You should find a shortcut icon on your desktop or choose Start gt Programs gt Audio Precision APWIN 2 2 gt APWIN 2 2x Choose Hardware is configured ta prompt Far hardware choice or na hardware was found Please select your hardware System Two System Two Cascade Cascade Plus System Two Cascade Cascade Plus in System Two Compatibility Mode Figure 66 Choose hardware dialog box Getting Started with Cascade Plus 67 Chapter 5 Getting Started with APWIN 68 Running Your First Tests If the dialog box in Figure 66 appears on your screen APWIN is not exchanging information with System Two Cascade Plus Check your APIB connections and be sure power is applied to System Two Cascade Plus If System Two Cascade Plus is not available you won t be able to perform the tests described here but you can run APWIN in Demo Mode to become familiar with i
19. scade Plus fixed and slide out Fixed Rack Mounting Brackets Install the fixed installation rack mounting kit as shown in Figure 42 The parts required are identified in the table in Figure 43 Figure 42 Fixed installation rack mounting kit Getting Started with Cascade Plus 51 Chapter 3 Hardware Installation Figure 43 Parts list for fixed installation rack mounting Rack Mounting FEM A P NUMBER IE SCRIP TIEN A 7170 XXXX RACK EAR BRACKET RH e 7170 XXXX RACK EAR BRACKET LH E SH HILOS CREW 6 32 5 16 MC FLT PH DGY 4 SCREW 10 32X3 8 MC TRUSS PH DGY 6 7320 0006 HANDLE 5114 1108 CREW FLT PH ZN 8 32X1 4 Sliding Rack Mounting Brackets The slide rack mounting kit is intended to be used with Chassis Track C 300 S Series non pivoting solid bearing chassis sections from General Devices Inc Indianapolis IN These chassis sections are available in several lenaths to fit a wide variety of racks Install the sliding installation rack mounting kit as shown in Figure 44 The parts required are identified in the table in Figure 45 Figure 44 Sliding rack mount installation kit Figure 45 Parts list for sliding rack mounting installation
20. strument and discussed on page 54 of this manual The AC voltage selector also must be set to the same voltage as the nominal power source voltage 100 120 230 or 240 V rms with the appropriate fuses Different fuses are required depending on the line voltage The International Electrotechnical Commission IEC 1010 1 requires that measuring circuit terminals used for voltage or current measurement be marked to indicate their Installation Category The Installation Category is defined by IEC 664 and is based on the amplitude of transient or impulse voltage that can be expected from the AC power distribution network This product is classified as INSTALLATION CATEGORY II abbreviated CAT II on the instrument front panel Do NOT substitute parts or make any modifications without the written approval of Audio Precision Doing so may create safety hazards This product is for indoor use pollution dearee 2 Getting Started with Cascade Plus vi LES Safety Symbols The following symbols may be marked on the panels or covers of equipment or modules and are used in this manual WARNING This symbol alerts you to a potentially hazardous condition such as the presence of dangerous voltage that could pose a risk of electrical shock Refer to the accompanying Warning Label or Tag and exercise extreme caution ATTENTION This symbol alerts you to important operating considerations or a potential operating condition that could
21. th Cascade Plus Rack Mounting Chapter 3 Hardware Installation Changing Fusing Arrangement To change from one fusing arrangement to the other 1 Remove the AC power cord from the AC Mains Connector 2 Open the cover of the connector fuse block voltage selector assembly with a small blade screwdriver or similar tool 3 On the back of the cover loosen the Phillips screw two turns then remove the fuse block by sliding up then away from the screw and lifting from pedestal at the other end refer to Figure 50 Fuse Block fits into notch Support Pedestal lt Cover Figure 50 Changing fuse types 4 Invert the fuse holder and reassemble it on the Phillips screw and pedestal and tighten the screw 5 Change or add the correct fuses as necessary again refer to rear panel for the correct fuse current rating 6 Confirm the line voltage setting as described in the previous section then replace the cover Proper Environment All Audio Precision System One System Two System Two Cascade and System Two Cascade Plus products are intended for use indoors in a normal environment Refer to Chapter 2 for temperature range and humidity specifications Getting Started with Cascade Plus 55 Chapter 5 Getting Started with APWIN Getting Started with APWIN This section will get your system up and running and will put results on the screen for you in mere moments For more detailed information ab
22. ts interface and capabilities If Figure 66 did not appear on your screen you are properly connected to System Two Cascade Plus As APWIN initializes you will see the APWIN startup screen and hear the relays click once again The main APWIN Screen will appear as shown in Figure 67 Like most Windows programs the APWIN Screen has a title bar a menu bar and a collection of toolbars Audio Precision APWIN Untitled File Edi View Panels Sweep Compute Procedure Utilities Window Help Sini 2 ael A Wim Sine x Normal Fr 1 00000 kHz Fast guid C High Phase Auto L amp 4 Function Reading C B o On v 1 000 Vims Amplitude Amplitude foo v APWIN V 2 20 S2C Plus For Help press F1 Figure 67 APWIN screen The APWIN Screen has five tabbed pages for display of its various test panels By default APWIN launches with the Analog Generator and Analog Analyzer panels on Page 1 the Sweep panel and an empty Graph on Page 2 and the Digital I O panel on Page 3 APWIN panels can be opened closed expanded or contracted double click the panel s title bar and placed on any page or even repeated on several pages Running Your First Tests This section discusses three different ways to use APWIN and System Two Cascade Plus to test your DUT DUT means Device Under Test the unit you are subjecting to measurement Sometimes it s called the EUT for Getti
23. witcher Can be used as either an input or output switcher Uses floating BNC connectors for unbalanced signals to prevent ground loops SWR 2122P Patch Point Switcher 12 point configuration allows a signal path to be interrupted and a test generator inserted while a measuring analyzer can access the output of a previous device Path continuity is maintained in the default non accessed mode Each of the 12 insertion points has a Getting Started with Cascade Plus 5 Chapter 1 Introduction Overview 5 XLR connector to allow balanced interface to the previous and next device DCX 127 Multi Function Module Figure 2 DCX 127 Multi Function Module The DCX 127 Multi Function Module contains an autoranging 4 1 2 digit dc voltmeter ohmmeter two 20 bit programmable dc voltage sources 21 bits of digital I O and three 8 bit programmable auxiliary output ports for device control or status indicators Typical applications include A D and D A converter testing VCA gain control linearity VCA distortion amplifier dc offset and power supply checks power amplifier load switching control loudspeaker voice coil resistance measurements temperature measurements and test fixture control The meter features 200 mV 500 V and 200 Q 2 MQ ranges fully floating and guarded for accurate measurements in the presence of large common mode voltages Resistance measurements can be made using either 4 wire or 2 wire techniques Readings can be
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