Agilent Technologies U9391C Service manual

Agilent Technologies
Agilent U9391C/F
Comb Generator
Operating and Service
Manual

2 Agilent U9391C/F Comb Generator Operating and Service Manual
Notices
© Agilent Technologies, Inc. 2008, 2009
No part of this manual may be reproduced in
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tronic storage and retrieval or translation
into a foreign language) without prior agree-
ment and written consent from Agilent
Technologies, Inc. as governed by United
States and international copyright laws.
Manual Part Number
U9391-90001
Edition
Third Edition, August 2009
Printed in Malaysia
Agilent Technologies, Inc.
Phase 3 Bayan Lepas Free Industrial Zone
Bayan Lepas, Penang 11900 Malaysia
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Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
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CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and
met.

Agilent U9391C/F Comb Generator Operating and Service Manual 3
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 (NIST, formerly
NBS), to the extend allowed by the Institute’s calibration
facility, and to the calibration facilities of the other
International Standards Organization members.
WEEE Compliance
This product complies with the WEEE Directive (2002/96/EC)
marking requirements. The affixed label indicates that you must
not discard this electrical/electronic product in domestic
household waste.
Product Category: With reference to the equipment types in the
WEEE Directive Annex I, this product is classed as a
"Monitoring and Control Instrumentation" product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Agilent office,
or see www.agilent.com for more information.

4 Agilent U9391C/F Comb Generator Operating and Service Manual
Contacting Agilent
For more information, please contact your nearest Agilent
office.
Or, go to www.agilent.com/find/assist for more information.
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www.agilent.com/find/contactus

Agilent U9391C/F Comb Generator Operating and Service Manual 5
Contents
1 Introduction 7
Product Overview 8
Key Features of Agilent U9391C/F Comb Generator 10
Compatible Agilent Network Analyzer 10
Options 11
Service and Recertification 11
2 Installation 13
Initial Inspection 14
Operating and Safety Precautions 15
ESD Damage 15
Comb Generator and Agilent PNA-X Configurations 17
3 Specification 19
General Specifications 20
Drive Power Supply Specifications 20
Physical Specification 20
Specifications 21
Mechanical Characteristic 22
Pin Depth 22
Environmental Specifications 27
Compliance Notices and Regulatory Information 28
Compliance With Electromagnetic Compatibility (EMC) 28
Declaration of Conformity 29
4OperatingGuides31
Operating Instruction 32
Service Instructions 39

6Agilent U9391C/F Comb Generator Operating and Service Manual

7
Agilent Technologies
Agilent U9391C/F Comb Generator
Operating and Service Manual
1
Introduction
Product Overview 8
“Key Features of Agilent U9391C/F Comb Generator” on page 10
“Compatible Agilent Network Analyzer” on page 10
“Options” on page 11
“Service and Recertification” on page 11
This chapter provides an overview specifications of Agilent
U9391C/F Comb Generator

8 Agilent U9391C/F Comb Generator Operating and Service Manual
1 Introduction
Product Overview
The U9391C/F comb generator was designed as a phase
reference standard for the Agilent PNA- X nonlinear vector
network analyzer (NVNA). It was developed to provide
precision phase calibration, traceable to the National Institute
of Standards and Technology (NIST).
NVNA component characterization software converts a 4- port
PNA- X with option 510 into an innovative, high- performance,
non- linear network analyzer which uses U9391C/F comb
generators as precision phase calibration standards. Comb
generators generate frequency harmonics at integer multiples of
an RF input signal.
Generally, comb generators available in the open market today
are made with SRD diodes, U9391C/F comb generators are
based on Agilent InP MMIC technology to ensure superior phase
stability of the combs.
Figure 1-1 U9391C Comb Generator

Introduction 1
Agilent U9391C/F Comb Generator Operating and Service Manual 9
The U9391C/F comb generator offers the advantage of wide
bandwidth 10MHz to 26.5GHz/50GHz output and small
minimum tone spacing (10MHz). When driven by low phase
noise sources, this comb generator will operate at frequencies
lower than 10MHz, but performance is not guaranteed. The
input power and fundamental frequency have lower sensitivity
than other comb generators. This means a comb generator
calibrated at a single power level and frequency can be used
across a wide range of input power. It comes with the option of
a female or male output connector.
U9391C/F modules are solid state devices which provide
excellent phase and amplitude flatness in the combs making
them ideal for use in phase calibration applications. A built- in
frequency divider, selectable via the PNA- X, reduces the noise
of the combs. You can set drive frequency at 1, 2, 4, 8 or 16 times
the pulse repetition frequency (PRF). Combining a frequency
divider with a wide input signal frequency range allows for a
broad range of possible harmonics spacing, making this suitable
Figure 1-2 U9391F Comb Generator

10 Agilent U9391C/F Comb Generator Operating and Service Manual
1 Introduction
for characterizing non- linear devices. This module has a trigger
output which enables synchronization with the pulse’s
repetition frequency. Calibration data stored inside the
U9391C/F can be accessed directly by the PNA- X via the USB
interface to be used in phase calibration.
Key Features of Agilent U9391C/F Comb Generator
•Excellent amplitude and phase flatness enable it to be used
as a precision calibration phase reference standard for the
NVNA
•NIST traceable phase calibration guarantees a reliable
reference to international standards
•Embedded calibration data can be easily accessed via the
plug- and- play USB interface
•The USB interface further facilitates frequency divider
control and calibration data retrieval via the PNA- X.
•Rugged 3.5mm/2.4mm bulk- head connectors guarantee high
repeatability throughout multiple connects and disconnects.
Compatible Agilent Network Analyzer
The U9391C/F are designed to operate with Agilent PNA- X
nonlinear vector network analyzer (NVNA). The U9391C/F
modules are controlled by the PNA- X network analyzer via a
USB connection with options required: 400, 419, 080, 510.
PNA- X network analyzers can be upgraded to perform
non- linear component characterization.

Introduction 1
Agilent U9391C/F Comb Generator Operating and Service Manual 11
Options
There are two connector options available for Agilent
U9391C/F.
Service and Recertification
If your Comb generator modules require service or
recertification, contact the nearest Agilent office for
information on where to send it. Refer to “ Contacting Agilent”
in the front matter of this manual. The performance of the comb
generator modules can only be verified by specially
manufactured equipment and calibration standards from
Agilent.
Recertification of Comb Generator Modules
The suggested interval for recertification is 12 months. After
reviewing the result of the initial recertification, you may
establish a shorter interval that reflects greater use and wear of
the module.
Table 1- 1 Options for Agilent U9391C/F
Option U9391C U9391F
Option FFF3.5mm Female (Output
connector)
2.4mm Female (Output
connector)
Option FFM3.5mm Male (Output
connector)
2.4mm Male (Output
connector)
NOTE The Trigger and Input ports are of 3.5mm Female connectors, for all the
options above

12 Agilent U9391C/F Comb Generator Operating and Service Manual
1 Introduction

13
Agilent Technologies
Agilent U9391C/F
Operating and Service Manual
2
Installation
Initial Inspection 14
Operating and Safety Precautions 15
Comb Generator and Agilent PNA-X Configurations 17
This chapter provides you important information on how to
check your instrument and preparation for operation.

14 Agilent U9391C/F Comb Generator Operating and Service Manual
2 Installation
Initial Inspection
1Unpack and inspect the shipping container and its contents
throughly to ensure that nothing was damaged during
shipment. If the shipping container or cushioning material is
damaged, the contents should be checked both mechanically
and electrically.
•Check for mechanical damage such as scratches or dents
•Procedures for checking electrical performance are given
under “Operator’s Check” on page 32.
2If the contents are damaged or defective, contact your
nearest Agilent Technologies Service and Support Office.
Refer to the Service and Support information in the front
matter of this manual. Agilent Technologies will arrange for
repair or replacement of the damaged or defective
equipment. Keep the shipping materials for the carrier’s
inspection.
3If you are returning the instrument under warranty or for
service, repackaging the instrument requires original
shipping containers and material or their equivalents.
Agilent Technologies can provide packaging materials
identical to the original materials. Refer to Service and
Support information in the front matter of this manual for
the Agilent Technologies nearest to you. Attach a tag
indicating the type of service required, return address, model
number and serial number. Mark the container FRAGILE to
insure careful handling. In any correspondence, refer to the
instrument by model number and serial number.
Kit Contents
The following table lists the item in U9391C/F kit.
Table 2- 1 U9391C/F Kit Contents
QUANTITY DESCRIPTION PART NUMBER
1 DC cable assembly - Banana plug 87405-20006
1 USB cable 8121-0506

Installation 2
Agilent U9391C/F Comb Generator Operating and Service Manual 15
Operating and Safety Precautions
Observe the following guidelines before connecting or operating the Comb Generator modules.
ESD Damage
Protection against electrostatic discharge (ESD) is important
while handling and operating the Agilent U9391C/F module.
Static electricity can build up on your body and can easily
damage sensitive components when discharged.
Static discharges too small to be felt can cause permanent
damage to the unit.
To prevent damage from ESD:
•Use a grounded antistatic mat in front of your test equipment
and wear a grounded wrist strap attached to it when
handling or operating the Comb Generator module.
•Wear a heel strap when working in an area with a conductive
floor.
•Ground yourself before you clean, inspect or make a
connection to an Comb Generator module. You can, for
example, grasp the grounded outer shell of the analyzer test
port or cable connector briefly.
•Avoid touching the center conductor of the test ports.

16 Agilent U9391C/F Comb Generator Operating and Service Manual
2 Installation
Connector Care
Because connectors can become defective due to wear during
normal use, all connectors should be inspected and maintained
to maximize their service life.
• Inspect the mating surface each time a connection is made.
Metal particles from connector threads often find their way
onto the mating surface when a connection is made or discon-
nected.
• Clean dirt and contamination from the connector mating sur-
face and threads. This simple step can extend the service life of
the connector and improve the quality of your calibration and
measurements.
• Gage connectors periodically. This not only provides assur-
ance of proper mechanical tolerances, and thus connector per-
formance, but can also indicate situations where the potential
for damage to another connector may exist.
CAUTION The Agilent Comb Generator modules can be damaged if apply
excessive torque to the connectors.
The recommended torque value is 8lb-in torque.

Installation 2
Agilent U9391C/F Comb Generator Operating and Service Manual 17
Comb Generator and Agilent PNA-X Configurations
Two units of U9391C/F are required to carry out non- linear
measurements. One unit is used as the phase reference module
and the second unit as the phase calibration module.
The U9391C/F units need to be powered by separate power
supplies.
The NVNA software automatically controls the U9391C/F units
via USB after the two units have been selected as the phase
reference and phase calibration module respectively.
Figure 2-1 U9391C/F and PNA-X Configuration

18 Agilent U9391C/F Comb Generator Operating and Service Manual
2 Installation
The phase calibration procedure is carried out by following the
on- screen instructions on the PNA- X.
After completing the calibration, the U9391C/F unit used for
phase calibration can be disconnected. The other unit that is
used as the phase reference will remain connected while the
measurement is carried out.
For more detailed information, please refer to the Help file that
is embedded in the NVNA application.
CAUTION When connecting the U9391C/F directly to the instrument test ports,
the modules will require mechanical support so as not to overstress
the test port connectors.

19
Agilent Technologies
Agilent U9391C/F
Operating and Service Manual
3
Specification
General Specifications 20
“Drive Power Supply Specifications” on page 20
“Physical Specification” on page 20
“Specifications” on page 21
Mechanical Characteristic 22
“Typical Pin Depth Values” on page 24
“Mechanical Dimension of the Modules” on page 25
Environmental Specifications 27
This chapter provides an overview specifications of Agilent
U9391C/F Comb Generator

20 Agilent U9391C/F Comb Generator Operating and Service Manual
3 Specification
General Specifications
Drive Power Supply Specifications
Figure 3-1 DC bias cable
Physical Specification
Table 3- 1 U9391C/F Drive Power Supply Specification
Voltage +15± 20% Vdc
Current 300mA (nominal)
NOTE Recommended DC power supply: E3620A
Compatible DC power supply: All E36XXA series power supply (except
E3612A and E3614A).
Current drawn will change when drive voltage changes
Net weight 0.370kg
Shipping weight 3.155kg
Shipping dimension
Length
Width
Height
52.5cm
34.0cm
19.5cm