Keysight 41800A Operation Note
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Keysight 41800A Operation Note

Keysight 41800A Operation Note

Active probe
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  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 Keysight 41800A Active Probe Keysight 41800A Active Probe Operation Note Operation Note * K E Y S I G H T TECHNOLOGIES Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 T echnol o gi e s. Agilent' s former T est and Measurement busi n ess has become Keysi g ht T echnol o gi e s. For more information, go to www.keysight.com. 1 ii k G KEYSI TECHNOLOGIESH T...
  • Page 4 Caution The 41800A is sensitive to electrostatic discharge (ESD). The followings must be adhered to when using the 41800A. • D o NOT touch the pin of the probe. • E l i m i n a t e ESD on your body.
  • Page 5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 6 ERRATA CHANGES 1 CHANGES 1 CHANGE 1 contains the information needed to adapt the 41800A’s manual. CHANGE 1 contains the information needed to adapt the 41800A's manual. Page 1-5 Table 1-3. Specifications (2 of 3) Page 1-5 Table 1-3. Specifications (2 of 3) Change the ‘Maximum Allowable Input (DC+AC):’...
  • Page 7 Description When using the 41800A with the instrument that does not supply probe power, you can use the external power supply and When using the 41800A with the instrument that does not supply probe power, you can use the external power supply and the cable (Agilent part number: 87405-20012) to supply a power to the active probe.
  • Page 8 Agilent 41800A Active Probe Operation Note Third Edition SERIAL NUMBERS This manual applies directly to Agilent 41800A Active Probe with serial number prefix 2850J. Agilent Technologies Innovating the HP Way Agilent Part No. 41800-90010 December 1999 Printed in Japan Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 9 Notices The information contained in this document is subject to change without notice. This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of the Agilent Technologies. Agilent Technologies Japan, Ltd.
  • Page 10 • D O NOT Substitute Parts Or Modify Instrument Because of the danger of introducing additional hazards, do not install substitute parts or perform unauthorized modifications to the instrument. Return the instrument to a Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.
  • Page 11 Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institution's calibration facility, or to the calibration facilities of other International Standards Organization members.
  • Page 12 Technologies shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort, or any other legal theory. Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact your nearest Agilent Technologies Sales and Service Office. Addresses are provided at the back of this manual.
  • Page 13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 14: Table Of Contents

    TABLE OF CONTENTS SECTION 1: G E N E R A L INFORMATION INTRODUCTION PRODUCT DESCRIPTION COMPATIBLE INSTRUMENTS SAFETY CONSIDERATIONS UNITS COVERED BY THIS OPERATION NOTE 1 - 2 PRODUCT CONTENTS SPECIFICATIONS ACCESSORIES AVAILABLE SECTION 2: I N S T A L L A T I O N SECTION CONTENTS INITIAL INSPECTION POWER REQUIREMENTS...

  • Page 15: Introduction

    SECTION 4: P E R F O R M A N C E TEST INTRODUCTION EQUIPMENT REQUIRED CALIBRATION CYCLE PREPARATION PROBE GAIN/FREQUENCY RESPONSE TESTS 4 - 3 1 dB GAIN COMPRESSION TEST SECTION 5: A D J U S T M E N T S INTRODUCTION EQUIPMENT REQUIRED PREPARATION...

  • Page 16: Product Description

    • Protective sleeve (to protect the probe tip from ESD and physical damage) COMPATIBLE INSTRUMENTS T h e HP 41800A can b e used with the spectrum and network analyzers listed in Table 1-1 which provide a probe power supply. Table 1-1. Compatible instruments...

  • Page 17: Units Covered By This Operation Note

    UNITS COVERED BY THIS OPERATION NOTE H e w l e t t - P a c k a r d uses a two-part, nine character serial number which i s stamped o n the serial number plate (see Figure 1-1) attached to the probe.

  • Page 18: Specifications

    PRODUCT CONTENTS T a b l e 1-2 lists the contents of the HP 41800A. Refer to Figure 2-1 for details. Table 1-2. Contents of the HP 41800A Description Qty. Probe Assembly HP 10218A Probe-BNC (m) Adapter 10:1 Divider 100:1 Divider...
  • Page 19 Table 1-3. Specifications (1 of 3) • Specifications describe the instrument's warranted performance over the tem- perature range of 23 ±5°C (except where noted). • The following performance is specified when the probe is terminated with an HP 11880A Type N Adapter. •...
  • Page 20 Table 1-3. Specifications (2 of 3) Noise Level [ V/Fli] 10 nV/s/Hz at >300 kHz Average Noise Level (Typical): +3 dB/Oct at <300 kHz (Refer to the following figure.) 10k 1 0 0 k 300k 1 M 1 0 M 1 0 0 M 5 0 0 M Frequency ( f ) [ Hz...
  • Page 21 Table 1-3. Specifications (3 of 3) Output Connector: f2 Type N male Power: V/60 mA, -12.6 V/60 mA Weight: kg (probe alone) 2 kg (included accessories) Length: a p p r o x i m a t e l y 1.2 m Operating Temperature Humidity: 0 °C to 55 °C, RH <95 % (40 °C)

  • Page 22: Initial Inspection

    H P 41800A h a s been mechanically a n d electrically checked o u t . Figure 2-1 shows the product overview of the HP 41800A. T h e procedures for checking the general electrical operation are given in SECTION 4, PERFORMANCE TEST.
  • Page 23 (10) Description HP Part Number Qty. Probe Assembly PN 41800-610011 Probe-BNC (m) Adapter HP 10218A 10:1 Divider PN 41800-60011 100:1 Divider PN 41800-60012 Slip-on Spanner Ground Tip PN 5060-0549 Ground Clip (flexible) PN 01123-61302 Probe Tip Nut Driver (3/32 inch) PN 8710-1806 HP 10229A Hook Tip Adapter HP 10229A...
  • Page 24 POWER REQUIREMENTS P o w e r for the HP 41800A is supplied by the Compatible Instru- ments listed in Table 1-1 b y connecting the HP 41800A's power plug to the probe power jack on the instrument. I f the instrument...

  • Page 25: Packaging

    PACKAGING T h i s paragraph describes how to repackage the HP 41800A for shipment when necessary. Original Packaging C o n t a i n e r s and packing material identical to those used in factory packaging are available from Hewlett-Packard. I f the unit is being...

  • Page 26: Overview

    F i g u r e 3 - 1 shows a n overview o f the HP 41800A probe assembly a n d Figure 3-2 shows the accessories furnished with the HP 41800A.
  • Page 27 Probe Assembly [ P r o t e c t i v e Sleeve] The HP 41800A probe assembly is equipped with a grounded protective sleeve to protect the probe tip from mechanical abuse and to reduce the chance of ESD damage. Extend the protective sleeve when not actually making measurements.
  • Page 28 Probe-BNC(m) Nut Driver Spare S p a r e Adapter Probe Pins Probe Pins Figure 3-2. HP 41800A Furnished Accessories HP 10218A Probe-BNC(m) Adapter is used to change the probe input to BNC(m) connector. To change the probe input to the BNC 5052 system, insert the probe into this adapter and connect a 5052 feed-through termination.
  • Page 29 HP 41800A. Three 12 mil pins and three 30 mil pins are furnished w i t h t h e H P 41800A a s spare probe p i n set. T h e HP 41800A is shipped from the factory with a 30 mil pin installed.

  • Page 30: Anti-Static Precautions

    OPERATING PRECAUTIONS T h i s paragraph describes precautions for using the HP 41800A to prevent from damage on the HP 41800A and your Device Under Test (DUT). Anti-static The HP 41800A is sensitive to electrostatic discharge (ESD). T h e Precautions followings must be adhered to when using the HP 41800A.

  • Page 31: Maximum Allowable Level

    The Probe Measuring a node having a DC voltage potential charges t h e blocking capacitors inside the H P 41800A probe. G r o u n d t h e probe pin after measuring such nodes to discharge probe capaci- tor.

  • Page 32: Preparation For Use

    These operating check pro- cedures are only intended to ensure that the HP 41800A is func- tional. I f the HP 41800A fails this check, it should be repaired. To verify that the HP 41800A meets its specifications, perform the PERFORMANCE TEST described in SECTION 4.

  • Page 33: Operating Check Using The Hp 4195A

    0 0 0 0 0 0 0 0 0 ...1=3 R1 . ® ® o ® ® ® N(m)-BNC(f) Adapter HP 10218A 41800A Figure 3-3. Operating Check Setup Using The HP 4195A [Equipment] • Network/Spectrum Analyzer HP 4195A • Probe-BNC(m) Adapter HP 10218A •...
  • Page 34 [Procedure] 1. Connect the equipment as shown in Figure 3-3. 2. S e t up the HP 4195A as follows. CONFIG SPECTRUM PORT SELECT SOURCE CH1 on CENTER 5 0 MHz SPAN 0 Hz AMPLITUDE (S1) - 2 6 dBm REF ATTEN (R1) 1 0 dB 3.

  • Page 35: Operating Check Using Network Analyzer 3 - 1

    0 0 0 0 • 0 0 0 0 0 ' 0 0 0 0 n 0000K--.2 OUTPUT Connector N(m)-BNC(f) Adapter 41800A HP 10218A 00000000 Figure 3-4. Operating Check Setup Using Network Analyzer [Equipment] • N e t w o r k Analyzer Compatible •...
  • Page 36 0 c i 5 0 0 0 0 0 0 0 00000000 o 0 0 0 O 0 0 0 0 CAL OUTPUT Connector 10218A 41800A Figure 3-5. Operating Check Setup Using Spectrum Analyzer [Equipment] • Spectrum Analyzer Any Compatible •...

  • Page 37: 10:1 / 100:1 Divider Adjustments

    This adjustment requires the HP 4195A, any com- patible Network Analyzer, or any compatible Spectrum Analyzer. Source output Calibration output Probe power Input N(m)-BNC(f) Adapter 41800A HP 10100C HP 10218A Figure 3-6. Divider Adjustment Setup [Equipment] • Network or Spectrum Analyzer Any Compatible •...
  • Page 38 B m 5. Disconnect the HP 41800A from the probe adapter. « 10:1 Divider Adjustment » 6. Connect the 10:1 divider to the HP 41800A's probe tip, and insert it into the probe adapter on the instrument's input connector.

  • Page 39: Typical Measurement Setups

    • Using two HP 41800A • S p e c t r u m Measurement Setups • Using the HP 41800A with an instrument which has a type-N input connector • Using the HP 41800A with an instrument which has a...

  • Page 40: Network Measurements

    Network [Using one HP 41800A] Measurenients Figure 3-8 shows a typical measurement setup for the network measurements. Place the probe tip as close to the input of the device under test, and perform a normalize (through) calibration to compensate the frequency response error.
  • Page 41 [Using one HP 41800A with a transmission/reflection test set] Figure 3-9 shows typical measurement setup f o r the network measurements using with a transmission/reflection test set. Place the probe tip as close to the input of the device under test, and perform a normalize (through) calibration t o compensate t h e frequency response error.
  • Page 42 • 0 0 0 0 0 0 0 0 0 0 • ® • 41800A * Terminate the DUT with a load if necessary. DUT L O A D * Figure 3-10. Network Measurement Setup Example (Using Two HP 41800As)

  • Page 43: Spectrum Measurements

    Spectrum [Using H P 41800A w i t h instruments w h i c h h a v e t y p e -N Measurements connectors] Figure 3-11 shows typical measurement setup using a spectrum analyzer which has a type-N input connector.
  • Page 44 BNC input connector. A BNC(m) cable and N(f)-BNC(f) adapter are recommended to use for connecting the HP 41800A to the spectrum analyzer. D o not use an unflexible adapter such as a BNC(m)-N(f) adapter instead of the cable and N(f)-BNC(f) adapter, otherwise t h e overweight caused b y t h e HP 41800A may damage the spectrum analyzer's connector.

  • Page 45: Probe Pin Replacement

    HP 11880A probe-N(m) adapter. 1. Unscrew the probe pin slowly using the probe tip nut driver (HP PN 8710-1806 ; furnished with the HP 41800A). 2. Screw in the new pin with the driver. NOTE A spare probe p i n s e t ( H P PN 41800-60021), includes 12 mil pins (3 ea.) and 30 mil pins (3 ea.), is available from...

  • Page 46: Equipment Required

    PERFORMANCE TESTS INTRODUCTION T h i s section provides performance test procedures to ensure that the HP 41800A meets the specifications listed in Table 1-3, Speci- fications. T h e performance test can be performed without ac- cessing the interior of the HP 41800A.

  • Page 47: Calibration Cycle

    1. T h e test equipment must be allowed to warm-up and stabilize for at least 30 minutes. 2. A H P 4195A i s required t o t e s t t h e H P 41800A. I n t h e remainder of this manual, softkeys are indicated in boldface type and enclosed in single quotes (e.g., 'NETWORK' softkey),...

  • Page 48: Probe Gain/Frequency Response Tests

    N(m)-N(m) Adapter N(m)-N(m) Adapter N(m)-N(m) Cable 11667A--,. 11880A-4'(9 NM-N(f) Adapter CABLE 1 (N(m)-N(m) Cable) ( 1 ) HP 41800A ( 2 ) Figure 4-1. Probe Gain/Frequency Response Test Setup EQUIPMENT: Network Analyzer HP 4195A Power Splitter HP 11667A Probe to N(m) Adapter...
  • Page 49 PERFORMANCE TESTS PROCEDURE: 1. Connect the power splitter to the HP 4195A as shown in Figure 4-1 (1). 2. Sequentially press the following HP 4195A front panel keys, to set the HP 4195A to the Probe Gain/Frequency Response test settings. CONFIG, 'NETWORK', PRESET AMPLITUDE (CHANNEL 1 side), - , 1 , 4 , ENTER/EXECUTE REF ATTEN (CHANNEL 1 side), 0 , ENTER/EXECUTE...
  • Page 50 6. Disconnect CABLE 1 (see Figure 4-1 (1)) from the power splitter, and connect the HP 41800A between the power splitter and CABLE 1 as shown in Figure 4-1 (2). «PROBE GAIN TEST» 7. Press the HP 4195A's TRIG/RESET key to make a single sweep measurement.
  • Page 51 PERFORMANCE TESTS 10. Confirm that the T/R data displayed in the upper right corner of the HP 4195A's display is 0 dB ± 0.5 dB. «FREQUENCY RESPONSE» 11. Enter the HP 4195A "A=A-A(88)" command using the following key stroke sequence to have the HP 4195A display the frequency response test results.
  • Page 52 PERFORMANCE TESTS 18. Sequentially press the following keys to change the HP 4195A's analysis range. MORE, 'ANA RNG' (move the o marker to the 200 MHz point) `active oMKR *MKR' ( " * M K R " in this softkey will change to intensified green) (move the m a r k e r to the 500 MHz point) `STORE ANA RNG'...

  • Page 53: Db Gain Compression Test

    „ ..k _ ni-N(rn) Cable 11667A N..11667A—a.- 4=1.--"N01-Nlt Adapter 8482A 8482A 11880A HP 41800A ( 2 ) Figure 4-2. 1 dB Gain Compression Test Setup EQUIPMENT: Spectrum Analyzer HP 4195A Power Meter HP 436A Power Sensor...
  • Page 54 7. Enter the HP 4195A "C=A" command using the following key sequence. CLR LINE, blue shiftkey, C, = , A, ENTER/EXECUTE 8. Disconnect N(m)-N(m) Cable from the power splitter, and connect the HP 41800A between the power splitter and N(m)-N(m) Cable, as shown in Figure 4-2 (2).
  • Page 55 NOTES Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 56 PERFORMANCE TEST RECORD Hewlett-Packard Tested by Date Model 41800A Serial No. Active Probe Temperature Humidity PROBE GAIN (at 50 MHz): Specification Actual 0 dB -±0.5 dB FREQUENCY RESPONSE (relative to 50 MHz): Specification Actual Max. at 10 Hz<f<50 Hz: +1 dB/-2 dB Min.
  • Page 57 NOTES Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 58: Introduction

    1. T h e test equipment must be allowed to warm-up and stabilize for at least 30 minutes. 2. A H P 4195A i s required t o t e s t t h e H P 41800A. T h e HP 4195A's front panel keys and softkeys are indicated as in the following example in this manual.

  • Page 59: Lf Gain/Flatness Adjustment

    ADJUSTMENT LF GAIN/FLATNESS ADJUSTMENT DESCRIPTION: The LF Gain/Flatness Adjustment adjusts the HP 41800A gain and frequency response. SETUP: HP 4195A HP 4195A 0 0 0 0 ❑ 0000 0000 222,2 D O D 0 0 0 0 0000 0 0 0 0...
  • Page 60 5. Disconnect CABLE 1 (see Figure 5-1 (1)) from the power splitter, and connect the HP 41800A between the power splitter and CABLE 1 as shown in Figure 5-1 (2). 6. Press the HP 4195A's TRIG/RESET key to make a single sweep measurement.
  • Page 61 ADJUSTMENT 8. Press the TRIG/RESET key, and the 'CONT mode' softkey to select the continuous sweep mode. 9. Adjust R18 (LF GAIN) and R25 (FLATNESS) so that the T/R data displayed by the HP 4195A is within ± 0.5 dB for the data at 50 MHz, as shown in Figure 5-3. R18 ( L F GAIN) R25 (FLATNESS) Figure 5-2.

  • Page 62: Introduction

    INTRODUCTION T h i s section contains the replaceable parts information, disassem- bly procedures, and troubleshooting and repair information. REPLACEABLE PARTS The HP 41800A's replaceable parts are listed i n Table 6-1, Re- placeable Parts. Table 6-1 gives the Hewlett-Packard part num- ber, quantity (Qty.), and description.
  • Page 63 Table 6-1. Replaceable Parts (1 of 3) 0 0 0 0 Reference Part Number Qty. Description Designator 41800-61601 Cable Assembly 41800-40005 Support Shield 41800-24012 Protective Sleeve 41800-24010 Outer Tube Probe Retainer CE Ring 0510-1325 O Ring 0905-1150 41800-60005 PC Board/Heatsink Assembly Nose Assembly 41800-60002 12 mil Probe Pin Assembly...
  • Page 64 Table 6-1. Replaceable Parts (2 of 3) Reference Part Number Qty. Description Designator 41800-87111 Label 0515-1873 Screw Metric 41800-04001 Cover 0515-0976 Screw M2 L6 2190-0654 Washer 41800-66502 Amplifier/Regulator Board Assembly 1401-0214 PVC Cap 41800-87112 Label 0515-0914 Screw-Mach M3x0.5 1250-2229 Connector N-PR-237 41800-20001 Case 41800-23003...
  • Page 65 Table 6-1. Replaceable Parts (3 of 3) Reference Part Number Qty. Description Designator 41800-610011 Probe Assembly 10218A Probe-BNC(m) Adapter 41800-60011 10:1 Divider Assembly 41800-60012 100:1 Divider Assembly 5060-0549 Slip-on Spanner Ground Tip Ground Clip (flexible) 01123-61302 8710-1806 Probe Tip Nut Driver (3/32 inch) 10229A Hook Tip Adapter Spare Probe Pin Set...

  • Page 66: Disassembly

    Removing t h e Amplifier/Regulator B o a r d Assembly requires removing t h e labels o n t h e H P 41800A. T h e labels w i l l b e damaged when you remove them. Use new labels after reassem- bling the HP 41800A (you must order the labels).
  • Page 67 4. Remove the two SHAFTs and the screw as shown in Figure 6-2. Screw C a b l e Assembly SHAFT N(m)Connector —0. A A m p l i f i e r / R e g u l a t o r B o a r d SMB C a b l e Lead ( B l a c k ) 3.
  • Page 68 PC Board/Heatsink Assembly Disassembly: 1. Remove the cable strain relief BOOT using the following procedure. a. Hold the probe by hand at position A as shown in Figure 6-3. b. Remove the BOOT by rotating it in the direction of arrow B as shown in Figure 6-3.
  • Page 69 4. Remove the probe NOSE piece using the following procedure. a. Use a wrench to hold the NOSE piece at position A as shown in Figure 6-6. b. Remove the NOSE piece by rotating it in the direction of arrow B as shown in Figure 6-6.
  • Page 70 6. Slide the 0 RING in direction A as shown in Figure 6-8. 0 RING P C Board/Heat s i n k TUBE Assembly 1: b l a c k 2: w h i t e 3: b l u e 4: r e d Figure 6-8.

  • Page 71: Theory Of Operation

    THEORY OF OPERATION The HP 41800A active probe consists of amplifiers and regulators. The amplifiers provide unity gain. T h e amplifiers are on the PC board/Heatsink assembly a n d t h e Amplifier/ReguIator B o a r d assembly.
  • Page 72 4. C h e c k the Cable assembly f o r damage. I f i t i s defective, replace it. Lead assignment: 1 - 1 2 . 6 V (from Host Instrument) 2 + 1 5 V (from Host Instrument) 3 + 9 V (to PC Board/Heatsink Assembly) 4 - 7 V (to PC Board/Heatsink Assembly) 5 G N D (from Host Instrument)
  • Page 73 NOTES Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 74 REGIONAL SALES AND SUPPORT OFFICES For more information about Agilent Technologies test and measurement products, applications, services, and f o r a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir. You can also contact one of the following centers and ask for a test and measurement sales representative. 1 1 / 2 9 / 9 9 United States: (fax) (61 3) 9272 0749...
  • Page 75 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 76 This information is subject to change without notice. © Keysight Technologies 1988, 1998, 1999, 2015 February 2015 1 1 1 1 1 1 1 111 KEYSIGHT 41800-90010 TECHNOLOGIES www.keysig ht.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 77 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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