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Huntron Access DH2 User Manual

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Huntron Access DH2
USER'S MANUAL
P/N 21-2637
Rev. B
Version 1.3
January, 2022
Copyright  2021 Huntron, Inc. All rights reserved.
Huntron, Tracker, ProTrack, and Huntron Access are registered trademarks of Huntron, Inc. All
other names are trademarks or registered trademarks of their respective companies.
This document may not be copied in whole or in part, or otherwise reproduced except as specifically
permitted under U.S. copyright law, without the prior written consent of Huntron, Inc.,
15720 Main Street, Suite #100, Mill Creek, WA, 98012, USA.
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  • Page 1 January, 2022 Copyright  2021 Huntron, Inc. All rights reserved. Huntron, Tracker, ProTrack, and Huntron Access are registered trademarks of Huntron, Inc. All other names are trademarks or registered trademarks of their respective companies. This document may not be copied in whole or in part, or otherwise reproduced except as specifically permitted under U.S.
  • Page 2 Huntron software, shall not exceed the amount of the purchase price of the Huntron Access DH2, regardless of the extent of any such damage, including any special, consequential, or incidental damages of any kind.

  • Page 3: Table Of Contents

    SECTION 1 INTRODUCTION ....................7 Introduction ......................7 Hardware and Software ..................8 Hardware Features of the Huntron Access DH2 ............8 Software applications for the Huntron Access DH2 ............. 8 Specifications ...................... 10 Specifications of Huntron Access DH2 Models ............10 Specifications for Access DH2 Tracker ................
  • Page 4 Common BNC (early versions) ..................22 Signal BNC ........................22 DMM Bananas ......................22 PG Banana ........................22 Prober Motor Control Connections ................23 Z Probe Motor DIN Connectors .................. 23 Z Probe Encoder DIN Connectors ................23 Z Probe Limit DIN Connectors ..................23 Z Probe Signal SMA Connectors ..................
  • Page 5 Signatures of Capacitors ..................... 37 ) on the Signature of a 10 F Capacitor ......... 37 Effect of Frequency (F ) on the Signature of a 0.1 F Capacitor ........ 38 Effect of Frequency (F ) on the Signature of a 1 F Capacitor ........38 Effect of Voltage (V Effect of Resistance (R ) on the Signature of a 1F Capacitor ........
  • Page 6 Review ......................... 79 Applications......................... 79 Low Voltage Integrated Circuits ................80 Review ......................... 81 Applications......................... 81 SECTION 9 APPLICATION NOTES ..................82 How to Use Commons ..................82 Access DH2 Connection Diagram ................ 83 User’s Manual 21-2637 Rev B Version 1.3...

  • Page 7: Section 1 Introduction

    Signature Analyzer. The Huntron Access DH2 allows test engineers and technicians to test and troubleshoot their difficult and elusive problems on PCAs. The Huntron Access DH2 has a Tracker Model 3200S Main PCA built inside that is referred to as the Access DH2 Tracker.

  • Page 8: Hardware And Software

     An internal 19” Rack is mounted in the cabinet for mounting equipment.  Cover door Stops the Access DH2 when the cover key switch is in the normal position. In the Interlock Bypass position the door can be opened without stopping the Access DH2.
  • Page 9  Optional Huntron Hardware SDK allows creation of custom programs to control the Huntron Access and Huntron Trackers.  Optional Huntron Workstation SDK allows other instruments to be controlled by the Huntron Workstation software. User’s Manual 21-2637 Rev B Version 1.3...

  • Page 10: Specifications

    Specifications Specifications of Huntron Access DH2 Models Specification Huntron Access DH2 Comments Physical Dimensions 47” W, 35.75” D, 61.5” H 119.4cm W, 83.8cm D, 156.2cm H Max board probing area 19” W by 12” D Area of the board that both probes 48.3 cm W by 30.5 cm D...
  • Page 11 NOTE 1 These levels of transient overvoltage are typical for equipment supplied from the building wiring. Applicable Pollution Pollution Degree 2 Safety considerations Front panel Probe Stop switch and CE mark and ETL listed Emergency Stop switch User’s Manual 21-2637 Rev B Version 1.3...

  • Page 12: Specifications For Access Dh2 Tracker

    Specifications for Access DH2 Tracker Electrical Specifications subject to change without notice Open Circuit Voltage (Vs): 24 selections of peak voltage: 200mV, 400mV, 600mV, 800mV, 1V to 20V in 1V steps including 10V (Low), 15V (Med 1), 20V (Med 2)

  • Page 13: Safety Information (Information Sur La Sécurité)

    Safety Information (Information sur la sécurité) The Huntron Access DH2 should only be used in the manner specified in this manual. The protection provided by the Huntron Access DH may be impaired if used in any other manner. Le Huntron Access DH2 ne doivent être utilisés de la manière indiquée dans ce manuel.
  • Page 14 CA de l'alimentation avant d'ouvrir / retirer les panneaux. Cover door stops the Access DH2 when the DOOR key switch is in the Normal position. Disable the Access DH2 before opening the door to insert/remove a PCA under test.
  • Page 15 Access DH2 cover door with the key in the Interlock Bypass position. For safety always close the door when mechanism is moving. La porte du couvercle arrête l'accès DH2 lorsque l'interrupteur à clé DOOR est en position normale.
  • Page 16 Il a été réglé en usine à 110 / 115Vac. Vérifiez qu'il est réglé sur la tension correcte pour l'alimentation être utilisé avant de le brancher. All Huntron Access DH2 models conform to the following Standards: IEC 61010-1:2010, AMD1:2016 Safety requirements for Electrical Equipment for Measurement, Control, and Laboratory Use;...

  • Page 17: Environment Conformity Quality

    Le remplacement du cordon d'alimentation principal qui ne répond pas aux exigences peut endommager l'équipement et blesser le personnel. Environment Conformity Quality For more information see our website www.huntron.com/corporate/environment.htm User’s Manual 21-2637 Rev B Version 1.3...

  • Page 18: Environment

    Conformity to Huntron Quality Standard at www.huntron.com/corporate/docs/conformity.pdf. Quality Huntron has been producing quality products and supporting customers all over the world for several decades. Our products conform to our Quality Manual. For information see our Quality Statement at www.huntron.com/corporate/docs/quality-statement.pdf.

  • Page 19: Section 2 Theory Of Operation

    Introduction The purpose of this section is to simply explain the functional characteristics of the main components of the Huntron Access system. Functional Overview The connection of instruments to the Test probe on each Z axis is directly is controlled by the software.

  • Page 20: Internal Pdu

    Controls and Signal Connections System Power Switch This switch is located on the top right-hand side of the front of the Access DH2. System Power Cord This cord is connected to the internal PDU and can be brought out through any of the access holes.

  • Page 21: Prober Stop Switch

    Note: If the Stop switch fails, disconnect the AC Inlet from Power. Prober Stop Switch The safety stop switch is located on the front of the Huntron Access DH2. Depressing this stop switch will cause all motor movement in the X and Y directions to immediately stop and have their respective power turned off.

  • Page 22: Common 3 Banana Jack

    Common 3 Banana Jack This banana jack is connected to an internal software-controlled relay that connects to internal Access DH2 Tracker or external Tracker/Tester controlled by the software. Common 4 Banana Jack This banana jack is connected to an internal software-controlled relay that connects to internal Access DH2 Tracker or external Tracker/Tester controlled by the software.

  • Page 23: Prober Motor Control Connections

    Prober Motor Control Connections Z Probe Motor DIN Connectors These connectors provide the drive signals to control the motor that drives the Z Probe. Z Probe Encoder DIN Connectors These connectors provide the sense signals to monitor the encoder on the Z Probe motor. Z Probe Limit DIN Connectors These connectors provide the drive and sense signals to monitor the limit switch on the Z Probe.

  • Page 24: Section 3 Installation

    SECTION 3 INSTALLATION 3-1 Installing Hardware 1. Locate unpackaging sheet and follow the steps 2. Make sure crossbar between the arms is removed 3-2 Starting System 1. Verify the front panel power switch is off. 2. Verify the front panel Emergency Shutdown switch is not engaged. 3.

  • Page 25: Section 4 Hardware Maintenance

    The X and Y rails should be lubricated once a month. The Z rails and shaft should be lubricated once a year. Warning: The linear raceways have to be lubricated using the supplied linear lube (Huntron Part Number 98-0116) which is included in your Tool kit. Do not use with any other lubricant. Procedure 1.

  • Page 26: Calibration Requirements

    Calibration Requirements There are no user calibration requirements. The unit is factory aligned and does not need calibration. Removing or loosening screws on the mechanical parts of the Access DH2 can affect movement accuracy. User’s Manual 21-2637 Rev B Version 1.3...

  • Page 27: Spring Contact Probes

    Spring Contact Probes The Huntron Access DH2 uses a spring-loaded probe for contacting a test point. Various probe styles are available depending on the type of components tested. These probes are commonly used in bed-of-nails fixtures and are readily available from a large number of manufacturers.

  • Page 28: 4-4 Cover Door

    4-4 Cover Door  Open and close door slowly  Replace weakened struts for safety 4-5 Casters and Leveling  Raise feet before moving  Lower feet in casters when unit in position 4-6 Front Bottom Doors  Use Key latch to keep doors closed and secure ...

  • Page 29: 4-12 Mouse

     Position cable clear of X motor path  Attach S6 per manufacturer instructions 4-16 Cleaning To clean the Access DH2, wipe with a damp cloth (do not use abrasives or solvents). Use plastic type polish to remove window scratches. User’s Manual...

  • Page 30: Section 5 Pca Support Accessories

    SECTION 5 PCA SUPPORT ACCESSORIES Documents See document 21-2600 Access DH2 Rotating PCB Support Instructions. It is also found on the 06-5217 Manual CD. User’s Manual 21-2637 Rev B Version 1.3...

  • Page 31: Section 6 Testing Passive Components

    SECTION 6 TESTING PASSIVE COMPONENTS 6-1. Resistors Exploring how the Access DH2 Tracker ranges interact with different resistance values is a good introduction on how basic ASA troubleshooting is applied. This section will briefly familiarize you with Access DH2 Tracker basic operation and teach you how resistor signatures relate to both test range and the resistance of the circuit under test.
  • Page 32 To display the analog signature of a resistor: 1. Select the Tracker tab of the Signature pane of the Huntron Workstation Software. 2. Select the 50ohm range by clicking the Resistance dropdown button and selecting 50. 3. Place or clip a test lead on the opposite ends of a resistor and observe the signature.

  • Page 33: The Effect Of R On Resistor Analog Signatures

    50 . This limit on range cannot be set above 10V because R parameter combinations is a result of the Access DH2 Tracker's STAR feature; it protects components from possible excessive power. In order to set V...

  • Page 34: The Effect Of F On Resistor Analog Signatures

    The Effect of F on Resistor Analog Signatures. Select the 10V, 50 and 20Hz range. Change the Frequency to 60Hz, 1KHz and 5KHz. Observe the resistor signatures in the following figures do not change as F changes. Fs = 20 Hz Fs = 60 Hz Fs = 1KHz Fs = 5KHz...

  • Page 35: Review

     The Access DH2 Tracker’s ability to determine the approximate fault resistance value greatly enhances the troubleshooting capability if the correct value is known.  The Access DH2 Tracker can be used to adjust a potentiometer in circuit to an approximate operational setting. This application requires a known good board.

  • Page 36: Capacitors

    Capacitors With a capacitor connected to the Access DH2 Tracker, the test signal across it responds quite differently than a resistor. The typical analog signature of a capacitor is an elliptical or circular pattern due to the fact that relationship between the test signal's current and voltage are non-linear.

  • Page 37: Signatures Of Capacitors

    1. Select the 10V, 50 and 60Hz range 2. Place or clip a test lead on the opposite ends of a capacitor and observe the signature. Signatures of Capacitors The figure below shows analog signatures for four different value capacitors, 1000 f, 100 f, 10 f and 1f.

  • Page 38: Effect Of Frequency

    = 100K Figure 6-12. Signatures of A 1F Capacitor at Different Internal Resistances. As the Access DH2 Tracker's internal resistance R decreased, the capacitor's signature changes from a horizontal elliptical pattern to a vertical elliptical pattern. In ASA, a large User’s Manual...

  • Page 39: Understanding Capacitor Analog Signatures

    X decreases. This means that when capacitance increases, the amount of current in the component or circuit will increase. On the Access DH2 Tracker, the elliptical signature will become increasingly vertical that implies more current flow.  Changing frequency F...
  • Page 40  V increases so current decreases proportionately  The elliptical signature becomes increasingly vertical The figure above shows how the three variable parameters affect the capacitive signature. Frequency F and internal resistance R has the greatest affect, while increasing voltage V has no affect.

  • Page 41: Capacitor Leakage Failures

    The following examples show what some capacitor leakage problems may look like in the Access DH2 Tracker signature display with 50, 10V and 60Hz selected. Normal Capacitor Leaky Capacitor Figure 6-15.

  • Page 42: Review

    Applications  The Access DH2 Tracker can locate defective capacitors in or out of circuit. The ranges cover 10 pF to 20,000 F.  When analyzing a capacitor's signature, adjust the Access DH2 Tracker's R and F the most pronounced ellipse.

  • Page 43: Inductors

    Inductors Inductors, like capacitors, have elliptical analog signatures and respond to Access DH2 Tracker's test signal non-linearly. Also, like capacitors, an inductor's reactance (resistance to an AC test signal) is dependent on the test signal's frequency. Because of the way they are constructed using wire with some amount of resistance in it, it is hard to find a pure inductance.

  • Page 44: Effect Of Frequency (F S ) On Inductor Signatures

    Effect of Frequency (F ) on Inductor Signatures Select 10V, 50, 60Hz. Then Select 1KHz and 5KHz. = 60 Hz = 1KHz = 5KHz Figure 6-18. Effect of Varying F on 12,000 µH Inductor Signatures. Note that the signature changes from a vertical position to a horizontal position as the frequency increases.

  • Page 45: Effect Of Internal Resistance

    DH2 Tracker's internal resistance R increases. This means the inductor's resistance can be analyzed by matching it with the Access DH2 Tracker's test signal resistance. Understanding Inductive Signatures Figure 6-21. Access DH2 Tracker Core Circuit Block Diagram with an Inductor.

  • Page 46: Applications

     Inductors display elliptical signatures similar to capacitors. Since the inductor also exhibits resistance, due to its construction, the ellipse may be distorted.  As the Access DH2 Tracker test signal’s frequency is increased, the ellipse signature becomes flatter. This response is opposite to that of a capacitor.
  • Page 47 AC line cord going to the computer. Turn the computer power switch to the on position. If there is a response on the Access DH2 Tracker signature display, adjust the test range for the most pronounced inductive signature.

  • Page 48: Electromechanical Switching Components

    A mechanical switch has two states: it is either open or closed. When open, no current can flow; when closed, it acts as a short and allows current to flow. The Access DH2 Tracker can test the switching function of mechanically activated switches easily. Unlike...

  • Page 49: Electromechanical Relays

    2. Connect the black test lead from Access DH2 Tracker’s Common jack to one side the relay coil (normally, the minus lead). 3. Connect the red test lead from Access DH2 Tracker’s Signal jack to the other side of the relay coil (normally, the plus lead).

  • Page 50: Review

    Review  The Access DH2 Tracker can test switches in real time. This makes an excellent test for micro switches, power switches, control switches, pressure and heat sensor switches.  As the mechanical switch closes, watch for erratic or discontinuous signature. Switch bounce will display as multiple closure signatures.

  • Page 51: Section 7 Testing Discrete Semiconductors

    SECTION 7 TESTING DISCRETE SEMICONDUCTORS 7-1. Diodes The most basic type of solid state semiconductor component is the diode. Diodes are formed by creating a junction between p-type and n-type semiconductor material. The PN junction gives diodes and semiconductor components polarity characteristics that allow them to conduct current when an external voltage is applied.
  • Page 52 Do the following to display the analog signature of a diode: 1. Select 50, 10V and 60Hz. 2. Place or clip the red test lead from the Access DH2 Tracker's Channel A jack to anode lead of the diode. 3. Place or clip the black test lead from the Access DH2 Tracker's Common jack to anode lead of the diode.

  • Page 53: Effects Of Frequency (F S ) On Diode Signatures

    Figure 7-4. Signature of A 1N914 Diode at Different Frequencies at 3V and 50. Effects of Internal Resistance (R ) on Diode Signatures Changing Access DH2 Tracker's internal resistance R moves the vertical knee portion of the diode's analog signature. As R increases, the knee of the signature moves inward toward the origin.

  • Page 54: Composite Diode Signatures

    Composite Diode Signatures A composite analog signature is a combination of several components connected together in an electronic circuit. Up to this point, we have been showing you what the basic component signatures look like out of circuit. In the real world of electronics troubleshooting, components are connected together in a circuit and when testing with ASA, the signatures are a composite that may appear quite complex.

  • Page 55: Diode Failures

    Again, when multiple components are connected together, it's important to realize that the Access DH2 Tracker has the ability to selectively display the signature of a single component.
  • Page 56 54 10V 1K 15V 20K, 20V Figure 7-12. Defective Diode Signature with a 50  Series Resistor. The LOW range shows that there is a resistive component to the signature when the diode is conducting. This is the result of a defect in the diode's internal PN junction. The resistance is visible only in LOW range because the voltage-drop across it is small.

  • Page 57: Internal Leakage In A Diode

    Internal Leakage in a Diode Figure 7-13. Defective Diode Model with an Internal Leakage Resistance. 50 10V 1K 15V 20K, 20V Figure 7-14. Signature of a 1N914Diode with Internal Leakage (10K in Parallel). Notice that in the 50range, there does not seem to be a problem. In both medium ranges, you can see the diode conducting when it should be acting like an open.
  • Page 58 Figure 7-15. Access DH2 Tracker Core Circuit Block Diagram with a Zener Diode. Figure 7-16. Single Zener Diode and 2 Zener Diodes in Series. Single 1N5239B Zener Diode 2 Zener Diodes in Series, 1N5239B Figure 7-17. Signatures of Zener Diodes at 20V, 20K...

  • Page 59: Review

     The polarity of an unmarked diode can be determined by the orientation of the display with a known diode.  The Access DH2 Tracker can be used to identify an unknown Zener diode. If the Zener diode is damaged, locate a good one, possibly on another board or in the same circuit and use the Access DH2 Tracker to approximate the voltage.

  • Page 60: Transistors

    Transistors A bipolar transistor is a three-layer device. There are two basic types. A PNP transistor has a layer of n-type silicon material sandwiched between two layers of p-type material. An NPN transistor has a layer of p-type silicon material sandwiched between two layers of n-type material.

  • Page 61: Bipolar Transistor Signatures

    Do the following to display the analog signatures of a bipolar transistor: 1. Select the 1K and 15V. 2. Place or clip the red test lead from the Access DH2 Tracker's Channel A jack to collector lead of the transistor.
  • Page 62 Diode 1N914 PNP 2N3906 NPN PN2222A Figure 7-20. Signatures of a Diode and Collector-Base of Transistors at 1K and 15V. Notice that the collector-base signature of an NPN transistor is identical to the signature of diode. The collector-base signature of a PNP transistor, which has opposite polarity from a NPN, looks similar to a diode with its polarity reversed.

  • Page 63: Identifying Unknown Transistors

    Sometimes, we need to identify unknown transistors. We may need to replace one in a circuit for which we do not have a schematic. The Access DH2 Tracker makes this a relatively simple procedure because each type of junction has a characteristic signature.

  • Page 64: Darlington Bipolar Transistor Signatures

    Figure 7-25. Signature of Pins 1 And 3 Of an Unknown Transistor. Darlington Bipolar Transistor Signatures The Darlington transistor is basically two transistors paired together in a special configuration. The emitter of the first transistor is connected to the base of the second transistor.

  • Page 65: Applications

     The Access DH2 Tracker can be used to determine the type of transistor; bipolar, Darlington, FET, etc.  The Access DH2 Tracker can be used to identify the polarity of a transistor (PNP or NPN).  The Access DH2 Tracker can be used to determine the base, collector and emitter on an unknown transistor.

  • Page 66: Solid State Switching Components

    Do the following to display the analog signature of a phototransistor: 1. Select the 1K and 15V. 2. Place or clip the red test lead from the Access DH2 Tracker's Channel A jack to collector lead of the component. 3. Place or clip the black test lead from the Access DH2 Tracker's Common jack to emitter lead of the component.

  • Page 67: Scrs And Triacs

    Do the following to display the analog signature of a SCR: 1. Select the 20V, 20K and 60Hz. 2. Place or clip the red test probe from the Access DH2 Tracker's Channel A jack to gate lead (G) of the component.

  • Page 68: Review

     The SCR and TRIAC can also be a problem to troubleshoot. They may be used to switch large currents. Quite often these components are susceptible to degradation and eventual failure. The Access DH2 Tracker can easily show these failures.

  • Page 69: Section 8 Testing Integrated Circuits

    14 to over 200, although quite often many pins share quite similar signatures. This can make troubleshooting easier by giving us an easy-to-find signature to use as a comparison. In this section, it is important to understand how the Access DH2 Tracker and ASA respond to these circuits.

  • Page 70: Digital Integrated Circuit Signatures

    IC's ground pin. For this example, the ground pin of the 74LS245 is pin 10. 3. Use the red test lead from the Access DH2 Tracker's Channel A jack. Probe each pin of the IC and view its signature on Access DH2 Tracker's signature display. For this example, pins 2 to 9 and 11 to 18 are all buffer circuits so they will have identical signatures.

  • Page 71: Signatures Of Logic Ic Families

    74LS245 are pin 1 and 19 and will have the same signatures. (Note: This is only for ICs out of circuit.) 5. Change the range to 10V, 100, 200Hz. Use the red test lead from the Access DH2 Tracker's Signal jack. Probe the power supply V input pin and view its signature on the signature display.

  • Page 72: Comparing Two Ttl Families

    Comparing Two TTL Families Although the logic function is the same, there are differences in the circuitry of each logic family. These differences can be readily seen in their signatures using the Access DH2 Tracker. We will illustrate these concepts with the following example of two hex inverters, a 7404 and a 74LS04 from different logic families.

  • Page 73: Cmos Logic Family

    IC's ground pin. For this example, the ground pin of the 74HC14 is pin 7. 3. Use the red test lead from the Access DH2 Tracker's Signal jack and probe each pin of the IC. For this example, pins 1, 3, 5, 9, 11 and 13 are all input buffer circuits so they will have identical signatures.

  • Page 74: Cmos Components And Test Frequency (F S )

    Common jack to both reference and suspect ICs or the board’s ground pin. 3. Place or clip the red test lead from the Access DH2 Tracker's Channel a test terminal to the reference or known good IC's pin. For this example, start with pin 1 of the known good IC.

  • Page 75: Review

     The IC signatures resemble Zener diodes.  There are many causes for IC failures and the Access DH2 Tracker can display its "health" as resistive leakage, an open or a short.  Functionally identical pins on a single IC out-of-circuit will display the same signature.

  • Page 76: Analog Circuits

    IC's ground or a power supply pin. For this example, the negative power supply pin of the 741 is pin 4 and the positive power supply is pin 8. 3. Use the red test lead from the Access DH2 Tracker's Signal jack and probe each pin of the IC.

  • Page 77: Troubleshooting Op Am Circuits

    Use the comparison test method when troubleshooting op amps in-circuit. In this case, components on a suspect board are compared to those on a known good board. The Access DH2 Tracker can help locate the defective component quickly.

  • Page 78: Linear Voltage Regulators

    Linear Voltage Regulators Voltage regulators are commonly found in many electronic assemblies. Some of the most popular integrated circuits of this type are three terminal devices like the 7805, a +5V DC regulator. The next figure shows the schematic and pin layout of the 7805. Different manufacturers implement their products with different topologies and manufacturing processes.

  • Page 79: Review

     The IC signatures resemble Zener diodes.  There are many causes for IC failures and the Access DH2 Tracker can display its "health" as resistive leakage, an open or a short.  Functionally identical pins on a single IC out-of-circuit will display the same signature.

  • Page 80: Low Voltage Integrated Circuits

    For this example, the ground pin of the 74LVQ245 is pin 10. 3. Use the red test lead from the Access DH2 Tracker's Channel A jack and probe each pin of the IC. For this example, pins 2 to 9 and 11 to 18 are all buffer circuits so they will have identical signatures.

  • Page 81: Review

     The IC signatures resemble regular and Zener diode signatures.  There are many causes for IC failures and the Access DH2 Tracker can display its "health" as resistive leakage, an open or a short.  Functionally identical pins on a single IC out-of-circuit will display the same signature.

  • Page 82: Section 9 Application Notes

    2 of those 4 Commons will get shorted to the main COM terminal. For example, In the Huntron Workstation software each range can be tested relative to Common 1 or Common 2 or Common 3 or Common 4. You will have to set up 4 ranges, each with a different Prober Common if you want to test it relative to all the above Commons.

  • Page 83: Access Dh2 Connection Diagram

    Access DH2 Tracker can be switched using software controls. These diagrams may be useful to help you understand the connection capabilities of the Access DH2. The second diagram is for earlier versions of the Access DH2 that had BNC oscilloscope connectors.
  • Page 84 User’s Manual 21-2637 Rev B Version 1.3...
  • Page 85 User’s Manual 21-2637 Rev B Version 1.3...

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