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Agilent 41900A PI-Network Test Fixture
Operation and Service Manual

Agilent Part No. 41900-90020
Printed in JAPAN January 2000
Fourth Edition
Notice
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.
Component Test PGU-Kobe
1-3-2, Murotani, Nishi-ku, Kobe-shi,
Hyogo, 651-2241 Japan

Warranty
This Agilent Technologies instrument product is warranted against defects in material and
workmanship for a period of three months from the date of shipment, except that in the case
of certain components listed in this manual, the warranty shall be for the speci ed period.
During the warranty period, Agilent Technologies will, at its option, either repair or replace
products that prove to be defective.
For warranty service or repair, this product must be returned to a service facility designed
by Agilent Technologies. The Buyer shall prepay shipping charges to Agilent Technologies
and Agilent Technologies shall pay shipping charges to return the product to the Buyer.
However, the Buyer shall pay all shipping charges, duties, and taxes for products returned to
Agilent Technologies from another country.
Agilent Technologies warrants that its software and rmware designed by Agilent Technologies
for use with an instrument will execute its programming instruction when property installed on
that instrument. Agilent Technologies does not warrant that the operation of the instrument,
or software, or rmware will be uninterrupted or error free.

Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized modi cation
or misuse, operation outside of the environmental speci cations for the product, or improper
site preparation or maintenance.
No other warranty is expressed or implied. Agilent Technologies speci cally disclaims the
implied warranties of merchantability and tness for a particular purpose.

Certi cation
The Agilent Technologies certi es that this product met its published speci cations at the
time of shipment from the factory. Agilent Technologies further certi es that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute's calibration facility, or to the calibration
facilities of other International Standards Organization members.
Exclusive Remedies
The remedies provided herein are the buyer's sole and exclusive remedies. Agilent 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.
If you need assistance, contact your nearest Agilent Technologies Sales and Service Oce.
Addresses are provided at the back of this manual.

Copyright 1995,1996,1998,2000 Agilent Technologies Japan, Ltd.
c
Manual Printing History
The manual printing date and part number indicate its current edition. The printing date
changes when a new edition is printed. (Minor corrections and updates that are incorporated
at reprint do not cause the date to change.) The manual part number changes when extensive
technical changes are incorporated.
January 1995 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : First Edition (part number: 41900-90000)
August 1996 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Second Edition (part number: 41900-90010)
March 1998 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Third Edition (part number: 41900-90010)
January 2000 : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Fourth Edition (part number: 41900-90020)

iv
Safety Summary
The following general safety precautions must be observed during all phases of operation,
service, and repair of this instrument. Failure to comply with these precautions or with speci c
WARNINGS given elsewhere in this manual violates safety standards of design, manufacture,
and intended use of the instrument.
The Agilent Technologies assumes no liability for the customer's failure to comply with these
requirements.

Do NOT Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of ammable gasses or fumes. Operation of any
electrical instrument in such an environment constitutes a safety hazard.

Keep Away from Live Circuits
Operating personnel must not remove instrument covers. Component replacement and
internal adjustments must be made only by quali ed maintenance personnel. Do not replace
components with the power cable connected. Under certain conditions, dangerous voltages
may exist even with the power cable removed. To avoid injury, always disconnect power and
discharge circuits before touching them.

Do NOT Service or Adjust While Alone
Do not attempt internal service or adjustment unless another person, capable of turning o
power and capable of rendering rst aid and resuscitation, is present.

Do NOT Substitute Parts or Modify Instrument
Because of the danger of introducing additional hazards, do not substitute parts or perform
unauthorized modi cations to the instrument. Return the instrument to a Agilent Technologies
Sales and Service Oce for service and repair to ensure the safety features are maintained.

Dangerous Procedure Warnings
Warnings, such as the example below, precede POTENTIALLY DANGEROUS PROCEDURES
throughout this manual. Instructions contained in the warnings must be followed.
Warning Dangerous voltages, capable of causing death, are present in this
instrument. Use extreme caution when handling, testing, and adjusting
this instrument.

v
Safety Symbols
General de nitions of safety symbols used on equipment or in manuals:
Instruction manual symbol. The product will be marked with this symbol
when it is necessary for the user to refer to the instruction manual in order to
protect against damage to the instrument.
Indicates dangerous voltage (terminals fed from the interior by voltage
exceeding 1000 volts must be so marked).
Protective ground terminal. For protection against electrical shock in case of
a fault in the instrument. Used with wiring terminals to indicate the terminal
that must be connected to ground before operating equipment.
Low-noise or noiseless, clean ground (earth) terminal. Used for a signal
common, as well as providing protection against electrical shock in case
of a fault in the instrument. A terminal marked with this symbol must be
connected to ground in the manner described in the installation (Operation)
manual, and before operating the equipment.
Frame or chassis terminal. A connection to the frame (chassis) of the
equipment that normally includes all exposed metal structures.
Alternating current (power line).
Direct current (power line).
Alternating or direct current (power line).
Warning denotes a hazard. It calls attention to a procedure, practice,
condition or the like, which, if not correctly performed or adhered to, could
result in injury or death to personnel.
Caution denotes a hazard. It calls attention to a procedure, practice, condition
or the like, which, if not correctly performed or adhered to, could result in
damage to or destruction of part or all of the product.
Note denotes important information. It calls attention to a procedure,
practice, condition or the like, which is essential to highlight.

vi
Contents
1. General Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Speci cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
For the 41900A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
For the 41900A used with the 87510A . . . . . . . . . . . . . . . . . . . 1-1
For the 41900A used with the E5100A/B . . . . . . . . . . . . . . . . . . 1-2
Supplemental Performance Characteristics . . . . . . . . . . . . . . . . . . 1-3
For the 41900A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2. Preparation for Use
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Repackaging the 41900A for Shipment . . . . . . . . . . . . . . . . . . . . 2-5
3. Operation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Connecting the 41900A for Use . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Assembling the CL Adapter Board (Option 001) . . . . . . . . . . . . . . . . 3-2
Using the Sample Programs (Option 001) . . . . . . . . . . . . . . . . . . . 3-5
Connecting the 41900A to the 87510A, E5100A/B . . . . . . . . . . . . . . 3-5
Executing the Sample Program . . . . . . . . . . . . . . . . . . . . . . . 3-5
4. Service
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
41900A Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Contents-1
Figures
1-1. Circuit model of the calibration standards . . . . . . . . . . . . . . . . . . 1-2
2-1. 41900A PI-Network Test Fixture Product Overview . . . . . . . . . . . . . 2-2
2-2. Option 001 Load Capacitor Adapter Kit Product Overview . . . . . . . . . . 2-4
3-1. Connecting the 41900A to the 87510A, E5100A/B . . . . . . . . . . . . . . 3-1
3-2. CL Adapter Board Circuit Diagram . . . . . . . . . . . . . . . . . . . . . 3-2
3-3. C1 , C2, CS Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-4. SHORT and LOAD Calibration . . . . . . . . . . . . . . . . . . . . . . . 3-7
3-5. CL Adapter Board Insertion . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
3-6. Load Capacitance Adjustment . . . . . . . . . . . . . . . . . . . . . . . 3-9
4-1. Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Tables
1-1. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-2. Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2-1. 41900A Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-2. Option 001 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
3-1. Example of C1 , C2 , CS Combinations . . . . . . . . . . . . . . . . . . . . 3-3
3-2. Contents of Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3-3. Parameters Measured . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
4-1. Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Contents-2
1
General Information
Introduction
The purpose of this manual is to enable you to use your 41900A PI-Network Test Fixture
eciently and con dently. This manual contains the following:
The speci cations of the 41900A (see this chapter).
Installing the 41900A (see chapter 2).
Operating the 41900A (see chapter 3).
Ordering replaceable parts for the 41900A (see chapter 4).

Speci cations
This section lists the complete 41900A speci cations. These speci cations are the performance
standards and limits against which the 41900A is tested. When shipped from the factory, the
41900A meets the following speci cations:

For the 41900A
Available Test Device : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : Leaded Crystal Resonator
Available Measurement Con guration : : : : Direct Measurement or Measurement with Load
Capacitor
Dimensions
PI-Network Test Fixture Main Assembly : : : : : : : : : : : : approx. 30 (H) 2 50 (W) 2 110 (D) mm
Weight
PI-Network Test Fixture Main Assembly : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : approx. 0.4 kg

For the 41900A used with the 87510A
The following speci cations show the performance when the 41900A is used with the 87510A
Gain-Phase Analyzer:
Calibration method : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 3-term calibration (OPEN/SHORT/LOAD)
(at the measurement terminal to which a device under test (DUT) is connected)
Circuit model of the calibration standards
OPEN Capacitance : C0
SHORT and LOAD Impedance @ frequency f:
2
f
R0 + R0 + j 2fL0
fC

General Information 1-1
Parameters:
Table 1-1. Parameters
Standard Value
OPEN C0 = 0.1 pF
SHORT R0 = 1

L0 = 0.6 nH
fC = 1.1 GHz
LOAD R0 = 50

L0 = 14 nH
fC = 1.1 GHz

For the 41900A used with the E5100A/B
The following speci cations show the performance when the 41900A is used with the
E5100A/B Network Analyzer:

Figure 1-1. Circuit model of the calibration standards
Parameters:
Table 1-2. Parameters
Standard Value
OPEN CP = 0.1 pF
RS = 1 T

LS = 0 nH
SHORT CP = 17.409 pF
RS = 1

LS = 0.6 nH
LOAD CP = 0.703 pF
RS = 50

LS = 15.7587 nH

1-2 General Information
Supplemental Performance Characteristics
This section lists supplemental performance characteristics. Supplemental performance
characteristics are not speci cations, but do provide additional information for the operator.
Supplemental performance characteristics are not guaranteed.

For the 41900A
Maximum Input Level : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 500 mW @ Input BNC Connector
(approx. 7 mW @ device under test)
Frequency Range : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 1 MHz to 200 MHz
Repeatability
Connection of the Shorting Plate : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 6 (0.1
+ 0.6 nH)
Connection of a leaded crystal resonator : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 6 (0.1
+2 nH)

General Information 1-3
2
Preparation for Use
Introduction
This chapter describes how to prepare the 41900A PI-Network Test Fixture for use. The topics
include the following:
Initial inspection.
Repackaging the 41900A for shipment.

Initial Inspection
The 41900A has been carefully inspected electrically and mechanically before being shipped
from the factory. It should be in perfect physical condition, no scratches, dents or the like, and
it should be in perfect electrical condition. Verify this by carefully performing an incoming
inspection to check the xture for signs of physical damage and missing contents. If any
discrepancy is found, notify the carrier and Agilent Technologies. Your Agilent Technologies
sales oce will arrange for repair and replacement without waiting for the claim to be settled.
1. Inspect the shipping container for damage. Keep the shipping materials until the incoming
inspection is completed.
2. Verify that the shipping container contains everything shown in Figure 2-1 and listed in
Table 2-1. If the 41900A is ordered with Option 001 (Load Capacitor Adapter Kit), it should
also contain the parts listed in Table 2-2.
3. Inspect the exterior of the 41900A for any signs of damage.

Preparation for Use 2-1
Figure 2-1. 41900A PI-Network Test Fixture Product Overview

2-2 Preparation for Use
Table 2-1. 41900A Contents
Reference Agilent Part
Designator Number Description Qty.
1 (Not assigned) PI-Network Test Fixture Main Assembly 1
2 41900-29002 Shorting Plate for Calibration 1
3 0699-2014 50
Resistor for Calibration 1
- 41900-66001 CL Adapter Board Kit1
5.0pF Fixed CL Board 1
5.5pF Fixed CL Board 1
6.0pF Fixed CL Board 1
7.0pF Fixed CL Board 1
- 41900-66002 CL Adapter Board Kit1
8.0pF Fixed CL Board 1
9.0pF Fixed CL Board 1
10.0pF Fixed CL Board 1
11.0pF Fixed CL Board 1
- 41900-66003 CL Adapter Board Kit1
12.0pF Fixed CL Board 1
13.0pF Fixed CL Board 1
14.0pF Fixed CL Board 1
16.0pF Fixed CL Board 1
- 41900-66004 CL Adapter Board Kit1
18.0pF Fixed CL Board 1
20.0pF Fixed CL Board 1
24.0pF Fixed CL Board 1
32.0pF Fixed CL Board 1
- 41900-90020 Operation and Service Manual1 1

1 Not shown in the gure.

Preparation for Use 2-3
Figure 2-2. Option 001 Load Capacitor Adapter Kit Product Overview
Table 2-2. Option 001 Contents
Reference Agilent Part
Designator Number Qty. Description
1 41900-87001 1 CL Adjustment Sample Program Disk
2 41900-66501 1 Blank CL Adapter Board
3 0160-5942 2 Capacitor, 1 pF
3 0160-5978 2 Capacitor, 2.2 pF
3 0160-5971 2 Capacitor, 4.7 pF
3 0160-5973 2 Capacitor, 6.8 pF
3 0160-5975 2 Capacitor, 10 pF
3 0160-5962 2 Capacitor, 15 pF
3 0160-5961 2 Capacitor, 22 pF
3 0699-3752 2 Resistor, 0

2-4 Preparation for Use
Repackaging the 41900A for Shipment
If shipment to a Agilent Technologies service center is required, the 41900A should be
repackaged using the original factory packaging materials.
If this material is not available, comparable packaging materials may be used. Wrap the 41900A
in heavy paper and pack in anti-static plastic packing material. Use sucient shock absorbing
material on all sides of the 41900A to provide a thick, rm cushion and to prevent movement.
Seal the shipping container securely and mark it FRAGILE.

Preparation for Use 2-5
3
Operation
Introduction
This chapter describes how to use the 41900A. The topics include the following:
Connecting the 41900A for Use.
Using the Sample Programs (Option 001).

Connecting the 41900A for Use
Figure 3-1 shows how to connect the 41900A to the 87510A Gain-Phase Analyzer, E5100A/B
Network Analyzer. If the instrument is the E5100A/B with option 600, the connection of the
20dB ATT is not neccessary.

Figure 3-1. Connecting the 41900A to the 87510A, E5100A/B

Operation 3-1
Assembling the CL Adapter Board (Option 001)
The CL Adapter Board initially has only a trimmer capacitor on it. It is necessary to choose
the appropriate capacitors and then solder them on the board to provide the required load
capacitance (CL ). Figure 3-2 shows a circuit diagram of the CL Adapter Board and Table 3-1
lists an example of the C1 , C2 , CS combinations to obtain the required load capacitance.

Figure 3-2. CL Adapter Board Circuit Diagram

3-2 Operation
Table 3-1. Example of C1 , C2 , CS Combinations
CL [pF] C1 [pF] C2 [pF] CS [pF] CLmin [pF] CLmax [pF]
33 22 6.8 (short) 31.7 35.6
32 22 4.7 (short) 29.6 33.5
31 22 4.7 (short) 29.6 33.5
30 15 10 (short) 27.9 31.8
29 22 2.2 (short) 27.1 31.0
28 22 1 (short) 25.9 29.8
27 22 (open) (short) 24.9 28.8
26 15 6.8 (short) 24.7 28.8
25 10 10 (short) 22.9 26.8
24 15 4.7 (short) 22.6 26.5
23 15 2.2 (short) 20.1 24.0
22 10 6.8 (short) 19.7 23.6
21 15 1 (short) 18.9 22.8
20 10 4.7 (short) 17.6 21.5
19 10 4.7 (short) 17.6 21.5
18 10 2.2 (short) 15.1 19.0
17 6.8 4.7 (short) 14.4 18.3
16 6.8 4.7 22 14.4 17.5
15 10 (open) 22 12.9 16.0
14 4.7 4.7 22 12.3 15.4
13 6.8 2.2 22 11.9 15.0
12 6.8 1 22 10.7 13.8
11 6.8 (open) 22 9.7 12.8
10 4.7 1 22 8.6 11.7
9 2.2 2.2 22 7.1 10.4
8 2.2 1 15 6.1 8.9
7 2.2 (open) 15 5.1 7.9
6 2.2 (open) 15 5.1 7.9
5 1 (open) 15 3.9 6.7
4 (open) (open) 15 2.9 5.7

Operation 3-3
Figure 3-3. C1, C2 , CS Location
Note To short the CS location on the CL Adapter Board, mount the 0
Resister
(Agilent Part Number 0699-3752) instead of a capacitor. To open the C1 or C2
location on the CL Adapter Board, do not mount any components.

3-4 Operation
Using the Sample Programs (Option 001)
The sample programs included in the disk (Agilent Part Number 41900-87002) are used to
perform the 3-Term Calibration and the load capacitance (CL) adjustment for the 41900A
PI-Network Test Fixture. The program which le me name is \FLCI_EQV" and \CAP_ADJ"
should be used with the 87510A Gain-Phase Analyzer. The program which is \FLCI_EQV.BAS"
and \CAP_ADJ.BAS" should be used with the E5100A/B Network Analyzer.
The le names of the sample programs contained in the sample program disk are as follows:
Table 3-2. Contents of Disk
Filename File Type Description
FLCI_EQV ASCII 3-Term Calibration and CL Adjustment Program including
measurement setup and equivalent circuit analysis routine.
FLCI_EQV.BAS DOS ibid.
CAP_ADJ ASCII 3-Term Calibration and CL Adjustment Program (an extract
of \FLCI_EQV").
CAP_ADJ.BAS DOS ibid. (an extract of \FLCI_EQV.BAS").
PI_DATA BDAT Calibration Data File (used in \FLCI_EQV" and \CAP_ADJ").
E5100a.DAT BDAT Calibration Data File (used in \FLCI_EQV.BAS" and
\CAP_ADJ.BAS").

Connecting the 41900A to the 87510A, E5100A/B
1. Turn the 87510A, E5100A/B ON.
2. Connect the 41900A to the 87510A, E5100A/B as shown in Figure 3-1.

Executing the Sample Program
Note The sample program can be used with or without an external keyboard.
However, it is recommended that you use an external keyboard to enter the
required parameters.

1. Insert the disk into the disk drive of the 87510A, E5100A/B.
2. Get the program, \FLCI_EQV" or \FLCI_EQV.BAS".
3. Run the program.
4. \Center frequency ? (MHz)" is displayed on the bottom of the display. Enter the required
center frequency in MHz and press 4215 on the 87510A's front panel, 4Enter5 on the
E5100A/B's front panel or 4Return5 on the external keyboard.
5. \Span frequency" is displayed on the bottom of the display. Enter the required span
frequency in kHz and press 4215 on the 87510A's front panel, 4Enter5 on the E5100A/B's
front panel or 4Return5 on the external keyboard.
6. \POWER (W)" is displayed on the bottom of the display. Enter the required test signal
power in W that should be applied to the DUT (device under test). Press 4215 on the
87510A's front panel, 4Enter5 on the E5100A/B's front panel or 4Return5 on the external
keyboard. To enter the default power (10 W), just press 4215, 4Enter5 or 4Return5.

Operation 3-5
7. \RESISTANCE (OHM)" is displayed on the bottom of the display. Enter the resonant
resistance of the DUT in
and press 4215 of the 87510A's front panel, 4Enter5 on the
E5100A/B's front panel or 4Return5 on the external keyboard. This resistance is used to set
the signal power at the output connector of the 87510A, E5100A/B. To enter the default
resistance (15
), just press 4215, 4Enter5 or 4Return5.
8. Prede ned standard values for the calibration and \MODIFY ? (Yes=1,No=0,DEFAULT=0)"
are displayed on the bottom half of the display.
To change the constants:
a. Type 1 and then press 4215 on the 87510A's front panel, 4Enter5 on the E5100A/B's front
panel or 4Return5 on the external keyboard to modify the standard values.
b. The 87510A, E5100A/B asks for a new standard value for each parameter. Enter a new
value using the numeric keys and then press 4215, 4Enter5 or 4Return5.
If you do not want to change the value, just press 4215 on the 87510A's front panel,
4Enter5 on the E5100A/B's front panel or 4Return5 on the external keyboard for each
standard.
c. After modifying the standard values, the 87510A, E5100A/B asks you to save the new
data to the data le. If you want to save the modi ed data, press 4215 on the 87510A's
front panel, 4Enter5 on the E5100A/B's front panel or 4Return5 of the external keyboard.
The saved data is used as the default setting the next time you run the program. If
you want to use the prede ned data, purge the le \PI_DATA" for the 87510A or
\E5100a.DAT" for the E5100A/B from the disk.
9. Set the positioning plate as shown in Figure 3-4. Connect the standards as follows and
make the measurements:
OPEN Verify that nothing is connected to the electrodes of the 41900A,
NNNNNNNNNNNNNN

then press OPEN on the 87510A's or E5100A/B's front panel. When
NNNNNNNNNNNNNN

completed, double parentheses enclose the OPEN softkey label.
SHORT Connect the Shorting Plate as shown in Figure 3-4, then press
NNNNNNNNNNNNNNNNN

SHORT on the 87510A's or E5100A/B's front panel. When
NNNNNNNNNNNNNNNNN

completed, double parentheses enclose the SHORT softkey label.
LOAD Connect the 50
Resistor as shown in Figure 3-4, then press LOAD
NNNNNNNNNNNNNN

on the 87510A's or E5100A/B's front panel. When completed,
NNNNNNNNNNNNNN

double parentheses enclose the LOAD key label.

3-6 Operation
Figure 3-4. SHORT and LOAD Calibration
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN

To abort the calibration, press CAL BREAK . The program is terminated by this key.
10. After completing the measurement of the standards, press DONE: 3 TERM CAL on the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

87510A's or E5100A/B'sfront panel to complete the calibration.
\COMPUTING CAL COEFFICIENTS" is displayed while the 87510A, E5100A/B is calculating
the calibration coecients.
11. Enter the frequency for the load capacitance adjustment in MHz and press 4215 on the
87510A's front panel, 4Enter5 on the E5100A/B's front panel or 4Return5 on the external
keyboard.
12. Insert the CL Adapter Board and Shorting Plate as shown in Figure 3-5, and then press
NNNNNNNNNNNNNNNNNNNNNNNNNN

softkey Continue on the 87510A, E5100A/B or 4F25 of the external keyboard.

Operation 3-7
Figure 3-5. CL Adapter Board Insertion
13. Load capacitance CL is measured continuously and the result is displayed on the display.
14. Adjust the load capacitance with a screw driver as shown in Figure 3-6.
Note Use a screwdriver with a ceramic or plastic blade to adjust the trimmer
capacitor. VESSEL Ceramic Adjustment Screwdriver No.9000 (0) 1.8230 is
R
recommended.

3-8 Operation
Figure 3-6. Load Capacitance Adjustment
15. Press softkey ADJUSTMENT END on the 87510A or E5100A/B after completing the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

adjustment.
16. Replace the Shorting Plate with the DUT as shown in Figure 3-5.
This is the end of the CL adjustment procedure. If it is necessary to obtain the equivalent
circuit parameters of the DUT, perform the remaining steps.
17. Press softkey Continue on the 87510A, E5100A/B or 4F25 on the external keyboard.
NNNNNNNNNNNNNNNNNNNNNNNNNN

Frequency characteristics and the following parameters of the DUT are displayed:
Table 3-3. Parameters Measured
Parameter Unit
Resonance Frequency (Fr ) MHz
Resonance Impedance CI (Zr )

Shunt Capacitance (C0) pF
Motional Capacitance (C1 ) pF
Motional Inductance (L1) mH
Motional Resistance (R1 )

Operation 3-9
NNNNNNNNNNNNNNNNNNNNNNNNNN

18. Connect a new DUT and press softkey Continue on the 87510A, E5100A/B Network
Analyzer or 4F25 on the external keyboard.

Note To skip the steps 4 through 7 and 17 though 18, use the program \CAP_ADJ" or
\CAP_ADJ.BAS".

3-10 Operation
4
Service
Introduction
This chapter covers the replaceable parts information for the 41900A.

41900A Replaceable Parts
Table 4-1 lists the replaceable parts for the 41900A. The parts listed can be ordered from your
nearest Agilent Technologies Oce. Ordering information must include the Agilent part number
and the quantity required.

Service 4-1
Figure 4-1. Replaceable Parts

4-2 Service
Table 4-1. Replaceable Parts
Reference Agilent Part
Designator Number Qty. Description
1 41900-08001 1 Spring
2 0699-2014 1 50
Resistor for Calibration
3 41900-29001 1 Shorting Plate
- 41900-66001 CL Adapter Board Kit1
1 5.0pF Fixed CL Board
1 5.5pF Fixed CL Board
1 6.0pF Fixed CL Board
1 7.0pF Fixed CL Board
- 41900-66002 CL Adapter Board Kit1
1 8.0pF Fixed CL Board
1 9.0pF Fixed CL Board
1 10.0pF Fixed CL Board
1 11.0pF Fixed CL Board
- 41900-66003 CL Adapter Board Kit1
1 12.0pF Fixed CL Board
1 13.0pF Fixed CL Board
1 14.0pF Fixed CL Board
1 16.0pF Fixed CL Board
- 41900-66004 CL Adapter Board Kit1
1 18.0pF Fixed CL Board
1 20.0pF Fixed CL Board
1 24.0pF Fixed CL Board
1 32.0pF Fixed CL Board
4 41900-66501 1 Blank CL Adapter Board
- 0160-5942 2 Capacitor, 1 pF
- 0160-5978 2 Capacitor, 2.2 pF
- 0160-5971 2 Capacitor, 4.7 pF
- 0160-5973 2 Capacitor, 6.8 pF
- 0160-5975 2 Capacitor, 10 pF
- 0160-5962 2 Capacitor, 15 pF
- 0160-5961 2 Capacitor, 22 pF
- 0699-3752 2 Resistor, 0

5 41900-87001 1 CL Adjustment Sample Program Disk
- 41900-90020 1 Operation and Service Manual1

1 Not shown in the gure.

Note Repair of the 41900A PI-Network Test Fixture is limited to the replacement of
the parts listed in Table 4-1.

Service 4-3