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Summary of Contents for LeCroy DA18000
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Page 1: Differential Amplifier
LeCroy DA18000 Differential Amplifier Instruction Manual December 2006... - Page 2 Customer Service Department or an authorized service center. However, this will be done only if the product is determined by LeCroy’s examination to be defective due to workmanship or materials, and the defect is not caused by misuse, neglect, accident, abnor- mal conditions of operation, or damage resulting from attempted repair or modifications by a non- authorized service facility.
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Page 3: Declaration Of Conformity
EN 61000-4-2/A2:2001 Electrostatic Discharge EN 61000-4-3/A1:2003 RF Radiated Electromagnetic Field Scott Bausback European Contact: Chief Operating Officer Your local LeCroy Sales Office or Place: LeCroy Corporation LeCroy Europe GmbH 700 Chestnut Ridge Road Waldhofer Str. 104 Chestnut Ridge, NY 10977... - Page 4 BLANK PAGE DA18000-OM-E Rev A...
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Page 5: Table Of Contents
Operation .................... 4-1 HANDLING THE AMPLIFIER ................4-1 2.92 MM CONNECTORS ..................4-1 COMPATIBILITY ....................4-1 CONNECTING THE AMPLIFIER TO A LECROY SERIAL DATA ANALYZER .4-1 AUTOCOLOR ID ....................4-2 OPERATION WITH THE SDA 18000 ..............4-2 CONNECTING THE AMPLIFIER TO THE TEST CIRCUIT .......4-3 2.92 mm Input Cables ................4-3... - Page 6 DA18000 Differential Amplifier VERIFICATION PROCEDURE ................. 7-2 1. Rise Time (20-80%) ................7-2 2. Voltage Gain Accuracy................7-5 Specifications ..................8-1 NOMINAL CHARACTERISTICS ............... 8-1 General ...................... 8-1 WARRANTED CHARACTERISTICS ..............8-1 TYPICAL CHARACTERISTICS ................ 8-2 ENVIRONMENTAL CHARACTERISTICS ............8-3 PHYSICAL CHARACTERISTICS ..............
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Page 7: Safety Information
Safety Information Safety Information SAFETY SYMBOLS The following symbols appear on the DA18000 Differential Amplifier or in this manual and alert the customer to important safety considerations. Refer to the accompanying information or document to protect against personal injury or damage to the instrument. -
Page 8: Operating Environment
CAUTION OPERATING ENVIRONMENT The DA18000 Differential Amplifier is intended for indoor use and should be operated in a clean, dry environment. The design of the differential amplifier has been verified to conform to EN 61010-031 safety standard per the following limits: •... -
Page 9: Overview
Overview Overview DESCRIPTION The DA18000 Differential Amplifier is a very high bandwidth differential amplifier with 50 Ω inputs and high common mode rejection, and is designed to be used exclusively with the SDA 18000 Serial Data Analyzer. The amplifier contains common circuitry such as power supply, communication and control and AutoColor ID. - Page 10 DA18000 Differential Amplifier BLANK PAGE DA18000-OM-E Rev A...
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Page 11: Components And Accessories
2.92 mm connectors of the amplifier. 2.92 mm ÷2 Attenuator The 2.92 mm attenuator can be used to extend the differen- tial mode range or to improve the VSWR by reducing reflec- tions. § § § DA18000-OM-E Rev A... - Page 12 DA18000 Differential Amplifier BLANK PAGE DA18000-OM-E Rev A...
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Page 13: Operation
2.92 MM CONNECTORS The 2.92 mm connector of the DA18000 amplifier is a precision coaxial connector that oper- ates up to 40 GHz. It is compatible with SMA, WSMA and 3.5 mm connectors. To avoid misalignment of the male pin to the female contact, the male pin of the 2.92 mm connector is made shorter than the SMA or 3.5 mm connector pins. -
Page 14: Autocolor Id
CAUTION To remove the DA18000 from the LeCroy oscilloscope, move the amplifier up and down while pulling gently till a loud snap is heard indicating that the amplifier is unlatched from the oscilloscope. -
Page 15: Connecting The Amplifier To The Test Circuit
Control through the oscilloscope’s interface can be found in the screen menu of the channel to which the amplifier is connected. Touching the tab indicating the attached amplifier (in this case DA18000) will activate the amplifier menu screen. Figure 4-5. -
Page 16: Use Of Dc ÷2 Attenuator
Adjust → DA18000 control dialog for the channel that the amplifier is connected to. DYNAMIC RANGE The DA18000 amplifier has no gain or attenuation control. The system gain is fixed at x1. Exceeding the common mode range may introduce distortion to the output signal. Use of the ÷2 attenuators will increase the differential mode range;... -
Page 17: Care And Maintenance
The amplifier case is not sealed and should never be immersed in any fluid. SERVICE STRATEGY Defective amplifiers must be returned to a LeCroy service facility for diagnosis and repair or replacement. A defective product under warranty will be repaired or replaced. RETURNING AN AMPLIFIER FOR CALIBRATION OR SERVICE Procedure for returning a product for calibration or service: Contact your local LeCroy sales representative to find out where to return the product. -
Page 18: Returning An Amplifier To A Different Country
DA18000 Differential Amplifier Mark the outside of the box with the shipping address given to you by the LeCroy rep- resentative; be sure to add the following: • ATTN: <RAN assigned by the LeCroy representative> • FRAGILE Insure the item for the replacement cost of the product. -
Page 19: Reference Information
This does not imply that the number can be doubled to 2 volts, however. For clarity, consider the following table of absolute voltages applied to the inputs of a differential amplifier that has a differential mode range or ±1 V and a common mode range of ±5 V: DA18000-OM-E Rev A... -
Page 20: Common Mode Rejection Ratio
DA18000 Differential Amplifier Voltage on + Voltage on - Difference Comment input to ground input to ground +1.5 V +0.8 V +0.7 V OK: within ±1 V range -1.5 V -0.8 V -0.7 V OK: within ±1 V range +0.8 V -0.1V... - Page 21 As such, it is very difficult to predict actual performance in the application for CMRR versus frequency graphs. The practical application of these graphs is to compare the relative com- mon mode rejection performance between different probes and amplifiers. § § § DA18000-OM-E Rev A...
- Page 22 DA18000 Differential Amplifier BLANK PAGE DA18000-OM-E Rev A...
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Page 23: Performance Verification
Performance Verification Performance Verification INTRODUCTION This procedure can be used to verify the warranted characteristics of the DA18000 Differen- tial Amplifier. The recommended calibration interval for this amplifier is one year. Test results can be recorded on a photocopy of the Test Record provided in Appendix A. -
Page 24: Preliminary Procedure
LeCroy: TW-8 PRELIMINARY PROCEDURE Allow at least 20 minutes warm-up time for the DA18000 Differential Amplifier and test equipment before performing the Verification Procedure. Turn on the other test equipment and allow these to warm up for the time recom- mended by the manufacturer. - Page 25 Set the SDA 18000 to Channel 1 and the timebase to 500 ps/div and 60 GS/s. Set the scope to trigger on Channel 1, and edge triggering to positive slope. Set math trace F1 to the Ptrace mean of Channel 1 (Figure 7-2). DA18000-OM-E Rev A...
- Page 26 DA18000 Differential Amplifier Figure 7-2. Math Menu Setup Set a measurement function to measure Rise 20-80% (Figure 7-3). Figure 7-3. Measure Menu Setup DA18000-OM-E Rev A...
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Page 27: Voltage Gain Accuracy
To measure the amplifier’s rise time, disconnect the coaxial cable and PLPA-K adapter from Channel 1 of the SDA 18000 and connect the cable only to the + input of the DA18000 amplifier. Connect the cable from Channel 2 TDR to the – input of the ampli- fier. - Page 28 (should be 50 ohms) in percent. Connect the DA18000 to the channel previously measured. Connect the Aux output to the positive input of the DA18000 using the same DMM adapter. Connect a short to the negative input of the DA18000.
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Page 29: Specifications
Section 8, Performance Verification, for all warranted specifications. Rise Time (Amplifier only) 19 ps (20-80%) Voltage Gain Accuracy > 2% 1. Measured with an SDA 18000 oscilloscope. Rise time of oscilloscope and source sub- tracted (rms). DA18000-OM-E Rev A... -
Page 30: Typical Characteristics
DA18000 Differential Amplifier TYPICAL CHARACTERISTICS Typical characteristics are parameters with no guaranteed performance. Tests for typical characteristics are not provided in the Performance Verification Procedure. Bandwidth (System) 100 kHz to 18 GHz (with SDA 18000) Rise Time (System) < 24 ps... -
Page 31: Environmental Characteristics
Specifications Figure 8-1. Typical DA18000 CMRR ENVIRONMENTAL CHARACTERISTICS The Environmental Characteristics are tested to specification MIL-PRF-28800F Class 4 Temperature (Operating) 0 °C to 40 °C Temperature (Non-operating) -40 °C to 71 °C Humidity (Operating) 5% to 80% RH (Non-condensing) 50% RH above 30 °C... -
Page 32: Compliance And Certifications
COMPLIANCE AND CERTIFICATIONS CE Compliant EC Declaration of Conformity The DA18000 meets the intent of the European Council Directive 73/23/EEC for Product Safety and 89/336/EEC for Electromagnetic Compatibility. This declaration is based upon compliance of the product to the following standards:... -
Page 33: Performance Verification Test Record
PERFORMANCE VERIFICATION TEST RECORD This record can be used to record the results of measurements made during the perfor- mance verification of the DA18000 Differential Amplifier. Photocopy this page and record the results on the copy. File the completed record as required by applicable internal quality procedures. - Page 34 DA18000 Differential Amplifier BLANK PAGE DA18000-OM-E Rev A...
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