User’s and Service Guide
Agilent Technologies 85050D
7 mm Economy Calibration Kit
This manual applies directly to 85050D calibration kits with serial number prefix
3101A.The calibration devices in this kit are individually serialized. Record the device
serial numbers in the table provided in this manual (see “Recording the Device Serial
Numbers” in Chapter 1.)
Agilent Part Number: 85050-90052
Printed in USA
Print Date: August 2008
Supersedes: December 2006
© Copyright 1994, 1996, 2002, 2006, 2008 Agilent Technologies, Inc. All rights reserved.
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ii 85050D
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85050D iii
iv 85050D
Contents
1 General Information
Calibration Kit Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Calibration Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Incoming Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Serial Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Recording the Device Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Calibration Kits Documented in This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Calibration Kit History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
85050D Kits with Serial Prefix 3027A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
When to Calibrate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
2 Specifications
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Temperature—What to Watch Out For . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Pin Depth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
3 Use, Maintenance, and Care of the Devices
Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Look for Obvious Defects and Damage First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Inspect the Mating Plane Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Cleaning Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Gaging Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Connector Gage Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
When to Gage Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Reading the Connector Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Gaging Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
How to Make a Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
How to Separate a Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Handling and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
4 Performance Verification
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
How Agilent Verifies the Devices in Your Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Recertification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
How Often to Recertify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Where to Send a Kit for Recertification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
5 Troubleshooting
Troubleshooting Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Where to Look for More Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Returning a Kit or Device to Agilent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
85050D Contents-v
Contents
Contacting Agilent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
6 Replaceable Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
A Standard Definitions
Class Assignments and Standard Definitions Values are Available on the Web. . . . . . . . . .A-2
Contents-vi 85050D
1 General Information
85050D 1- 1
General Information
Calibration Kit Overview
Calibration Kit Overview
The Agilent 85050D 7 mm calibration kit is used to calibrate Agilent network analyzers up
to 18 GHz for measurements of components with 7 mm connectors.
The standards in this calibration kit allow you to perform simple 1- or 2-port and TRM
(thru–reflect–match) calibrations.
This manual describes the 85050D calibration kit and provides replacement part numbers,
specifications, and procedures for using, maintaining, and troubleshooting the kit.
Kit Contents
The 85050D calibration kit includes the following items:
• user’s and service guide
• open, short, and broadband load terminations
• 3/4 in, 135 N-cm (12 in-lb) torque wrench for use on the 7-mm connectors
• a data disk that contains the calibration definitions of the devices in the kit for the 8510
systems
• a data disk set that contains the specifications and performance verification data for the
8510 systems
Refer to Table 6-1 on page 6-2 for a complete list of kit contents and their associated part
numbers.
NOTE
A backup copy of each data disk and printout should be made immediately
upon receipt of the calibration kit. Refer to your analyzer user’s guide for
instructions on duplicating a disk.
To view an online VNA user guide, use the following steps:
1. Go to www.agilent.com.
2. Enter your VNA model number (Ex: 8720ES) in the Search box and
click Search.
3. Click on Manuals.
4. Click on the title/hyperlink for the User Guide PDF you want to view. If
the User Guide you want to view isn’t listed on the Web page that is
seen initially, click on the More hyperlink (if displayed).
Opens and Shorts
The opens and shorts are built from parts that are machined to the current state-of-the-art
in precision machining.
The shorts have a one-piece shorting plane that combines the inner and outer conductors.
The construction provides for extremely repeatable connections.
1- 2 85050D
General Information
Calibration Kit Overview
The opens have a low-dielectric collet depressor that is flush with the outer conductor.
Both the opens and shorts are constructed so that the pin depth can be controlled very
tightly, thereby minimizing phase errors. The lengths of the offsets in the opens and shorts
are designed so that the difference in phase of their reflection coefficients is approximately
180 degrees at all frequencies.
Broadband Load
The broadband load is a metrology-grade termination that has been optimized for
performance up to 18 GHz. The rugged internal structure provides for highly repeatable
connections. A distributed resistive element on sapphire provides excellent stability and
return loss. The broadband load is a valid substitute for a lowband load.
Calibration Definitions
The calibration kit must be selected and the calibration definitions for the devices in the
kit installed in the network analyzer prior to performing a calibration. Refer to your
network analyzer user’s guide for instructions on selecting the calibration kit and
performing a calibration.
The calibration definitions can be:
• resident within the analyzer
• loaded from the provided disk
• entered from the front panel
Installation of the Calibration Definitions
The calibration definitions for the kit may be permanently installed in the internal
memory or hard disk of the network analyzer.
If the calibration definitions for the kit are not permanently installed in the network
analyzer, they must be manually entered. Refer to your network analyzer user’s guide for
instructions.
Equipment Required but Not Supplied
Connector cleaning supplies and various electrostatic discharge (ESD) protection devices
are not supplied with the calibration kit but are required to ensure successful operation of
the kit. Refer to
Table 6-1 on page 6-2 for ordering information.
85050D 1-3
General Information
Incoming Inspection
Incoming Inspection
Refer to “Kit Contents” on page 1-2 to verify a complete shipment. Use Table 1-1 to record
the serial numbers of all serialized devices in your kit.
Check for damage. The foam-lined storage case provides protection during shipping. If the
case or any device appears damaged, or if the shipment is incomplete, refer to
Agilent” on page 5-5. Agilent will arrange for repair or replacement of incomplete or
damaged shipments without waiting for a settlement from the transportation company.
See
“Returning a Kit or Device to Agilent” on page 5-4.
“Contacting
Serial Numbers
A serial number is attached to this calibration kit. The first four digits followed by a letter
comprise the serial number prefix; the last five digits are the suffix, unique to each
calibration kit.
Recording the Device Serial Numbers
In addition to the kit serial number, the devices in the kit are individually serialized (serial
numbers are labeled onto the body of each device). Record these serial numbers in
Table 1-1. Recording the serial numbers will prevent confusing the devices in this kit with
similar devices from other kits.
Table 1-1 Serial Number Record for the 85050D
Device Serial Number
Calibration kit
Broadband load
Open
Short
_______________________________
_______________________________
_______________________________
_______________________________
Calibration Kits Documented in This Manual
This manual applies to any 85050D calibration kit whose serial number is listed on the
title page. If your calibration kit has a different serial number prefix, refer to the
“Calibration Kit History” section below for information on how this manual applies.
1- 4 85050D
General Information
Preventive Maintenance
Calibration Kit History
This section describes calibration kits with serial number prefixes lower that the ones
listed on the title page.
85050D Kits with Serial Prefix 3027A
These calibration kits did not have the calibration definitions disk to support the Agilent
8510C network analyzer. The part numbers provided in this manual are the recommended
replacement parts for these kits. The devices in these kits should meet the specifications
published in this manual.
Preventive Maintenance
The best techniques for maintaining the integrity of the devices in the kit include:
• routine visual inspection
• cleaning
• proper gaging
• proper connection techniques
All of these are described in Chapter 3 , “Use, Maintenance, and Care of the Devices.”
Failure to detect and remove dirt or metallic particles on a mating plane surface can
degrade repeatability and accuracy and can damage any connector mated to it. Improper
connections, resulting from pin depth values being out of the observed limits (see
on page 2-5) or from bad connection techniques, can also damage these devices.
Table 2-2
When to Calibrate
A network analyzer calibration remains valid as long as the changes in the systematic
error are insignificant. This means that changes to the uncorrected leakages (directivity
and isolation), mismatches (source match and load match), and frequency response of the
system are small (<10%) relative to accuracy specifications.
Change in the environment (especially temperature) between calibration and
measurement is the major cause in calibration accuracy degradation. The major effect is a
change in the physical length of external and internal cables. Other important causes are
dirty and damaged test port connectors and calibration standards. If the connectors
become dirty or damaged, measurement repeatability and accuracy is affected.
Fortunately, it is relatively easy to evaluate the general validity of the calibration. To test
repeatability, remeasure one of the calibration standards. If you can not obtain repeatable
measurements from your calibration standards, maintenance needs to be performed on the
test port connectors, cables and calibration standards. Also, maintain at least one sample
85050D 1-5
General Information
When to Calibrate
of the device under test or some known device as your reference device. A verification kit
may be used for this purpose. After calibration, measure the reference device and note its
responses. Periodically remeasure the device and note any changes in its corrected
response which can be attributed to the test system. With experience you will be able to see
changes in the reference responses that indicate a need to perform the measurement
calibration again.
1- 6 85050D
2 Specifications
85050D 2- 1
Specifications
Environmental Requirements
Environmental Requirements
Table 2-1 Environmental Requirements
Parameter Limits
Temp er at ur e
Operating
Storage −40 °C to +75 °C
Error-corrected range
Relative humidity Type tested, 0% to 95% at 40 °C, non-condensing
a. The temperature range over which the calibration standards maintain conformance to their
b. The allowable network analyzer ambient temperature drift during measurement calibration
a
b
specifications.
and during measurements when the network analyzer error correction is turned on. Also, the
range over which the network analyzer maintains its specified performance while correction
is turned on.
+20 °C to +26 °C
± 1 °C of measurement calibration temperature
Temperature—What to Watch Out For
Changes in temperature can affect electrical characteristics. Therefore, the operating
temperature is a critical factor in performance. During a measurement calibration, the
temperature of the calibration devices must be stable and within the range shown in
Table 2-1.
IMPORTANT
Avoid unnecessary handling of the devices during calibration because your
fingers are a heat source.
2-2 85050D
Specifications
Mechanical Characteristics
Mechanical Characteristics
Mechanical characteristics such as center conductor protrusion and pin depth are not
performance specifications. They are, however, important supplemental characteristics
related to electrical performance. Agilent Technologies verifies the mechanical
characteristics of the devices in the kit with special gaging processes and electrical testing.
This ensures that the device connectors do not exhibit any center conductor protrusion or
improper pin depth when the kit leaves the factory.
“Gaging Connectors” on page 3-6 explains how to use gages to determine if the kit devices
have maintained their mechanical integrity. Refer to Table 2-2 on page 2-5 for typical and
observed pin depth limits.
Pin Depth
Pin depth is the distance the center conductor mating plane differs from being flush with
the outer conductor mating plane. See
one of two states: either protruding or recessed.
Figure 2-1. The pin depth of a connector can be in
Protrusion is the condition in which the center conductor extends beyond the outer
conductor mating plane. This condition will indicate a positive value on the connector gage.
Recession is the condition in which the center conductor is set back from the outer
conductor mating plane. This condition will indicate a negative value on the connector
gage.
85050D 2-3
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