HP 8719 ET, ES, 8720 ET, ES, 8722 ET, ES network analyzer Service Guide
Anúncio
Anúncio
Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
Network Analyzers
HP Part Number 08720-90397
Printed in USA
September 1999
© Copyright 1999
Hewlett-Packard Company
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Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
Certification
Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies 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, and to the calibration facilities of other International Standards Organization members.
Regulatory and Warranty Information
The regulatory and warranty information is located in Chapter 15 , “Safety and
Regulatory Information.”
Assistance
Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard sales or service office. See Table 15-1 for the nearest office.
Safety Notes
The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. All pertinent safety notes for using this product are located in Chapter 15 , “Safety and Regulatory
Information.”
WARNING
Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions are fully understood and met.
CAUTION
Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, would result in damage to or destruction of the instrument. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.
How to Use This Guide
This guide uses the following conventions:
Front-Panel Key
SOFTKEY
Screen Text
This represents a key physically located on the instrument.
This represents a “softkey,” a key whose label is determined by the instrument’s firmware.
This represents text displayed on the instrument’s screen.
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Documentation Map
The Installation and Quick Start Guide provides procedures for installing, configuring, and verifying the operation of the analyzer. It also will help you familiarize yourself with the basic operation of the analyzer.
The User’s Guide shows how to make measurements, explains commonly-used features, and tells you how to get the most performance from your analyzer.
The Reference Guide provides reference information, such as specifications, menu maps, and key definitions.
The Programmer’s Guide provides general HP-IB programming information, a command reference, and example programs. The
Programmer’s Guide contains a CD-ROM with example programs.
The CD-ROM provides the Installation and Quick Start Guide, the
User’s Guide, the Reference Guide, and the Programmer’s Guide in
PDF format for viewing or printing from a PC.
The Service Guide provides information on calibrating, troubleshooting, and servicing your analyzer. The Service Guide is not part of a standard shipment and is available only as Option 0BW, or by ordering HP part number 08720-90397. A CD-ROM with the
Service Guide in PDF format is included for viewing or printing from a PC.
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Contents
1. Service Equipment and Analyzer Options
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Service Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Principles of Microwave Connector Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Analyzer Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Option 1D5, High Stability Frequency Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Option 004, Step Attenuator (ET Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Option 007, Mechanical Transfer Switch (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Option 010, Time Domain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Option 012, Direct Access Receiver Configuration (ES Models) . . . . . . . . . . . . . . . . . . . . .1-7
Option 085, High Power System (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Option 089, Frequency Offset Mode (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Option 400, Four-Sampler Test Set (ES Models). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Option 1CP, Rack Mount Flange Kit With Handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Option 1CM, Rack Mount Flange Kit Without Handles . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Service and Support Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Option W54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
2. System Verification and Performance Tests
Sections in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
How to Test the Performance of Your Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
ANSI/NCSL Z540–1–1994 Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Non–ANSI/NCSL Z540–1–1994 Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Instrument Verification Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Preliminary Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Required Equipment and Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Check the Temperature and Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Clean and Gauge All Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Perform the Internal Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Procedure to Perform Operator’s Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Check the Test Port Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
System Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
Equipment Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
Measurement Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25
Verification Device Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
Performing the Verification Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30
If the System Fails the Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-34
Interpreting the Verification Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-35
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-37
Frequency Accuracy Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
Level Accuracy Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-41
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Source Linearity Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Dynamic Range Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
Performance Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
3. Adjustments and Correction Constants
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
A7 Switch Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Source Pretune Correction Constants (Test 43) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Analog Bus Correction Constants (Test 44) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
IF Step Correction Constants (Test 47) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
ADC Offset Correction Constants (Test 48) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Serial Number Correction Constants (Test 49) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Protected Option Numbers Correction Constants (Test 50) . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Unprotected Hardware Option Correction Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Output Power Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Preparing the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Setting the Main Power DAC to Preset Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Setting the Potentiometers to the Minimum Levels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Adjusting the Mid Band Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Adjusting the Low Band Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Adjusting the High Band Power (Agilent 8722ET/ES) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Fine Tuning the Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Power Linearity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Preparatory Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
Blanking Adjustment (Test 54) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Preparing the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
Initialize EEPROMs (Test 53) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
EEPROM Backup Disk Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Correction Constants Retrieval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Loading Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Loading Firmware into an Existing CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Loading Firmware into a New CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38
Reference Assembly VCO Tune Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Frequency Accuracy Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43
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API Spur Avoidance and 100 kHz FM Sideband Adjustment . . . . . . . . . . . . . . . . . . . . . . .3-44
FM Sideband Adjustment (100 kHz Spurs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-44
API Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-46
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-47
Raw Offset Correction Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-48
Raw Offset for the R Channel (ET/ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-49
Raw Offset for the A and B Channels (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-51
Raw Offsets for the A and B Channels (ET Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-54
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-57
Sampler Calibration Correction Constants (Test 51) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-58
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-61
4. Start Troubleshooting Here
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Having Your Analyzer Serviced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Step 1. Initial Observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Initiate the Analyzer Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Step 2. Operator’s Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Procedure to Perform Operator’s Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
In Case of Difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
Step 3. HP-IB Systems Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10
If Using a Plotter or Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
If Using an External Disk Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
Troubleshooting Systems with Multiple Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
Troubleshooting Systems with Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
Step 4. Faulty Group Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
Power Supply Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Check the Rear Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Check the Post Regulator (A8)LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Digital Control Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15
Observe the Power Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15
Verify Internal Tests Passed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Source Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Phase Lock Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
Check Source Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
No Oscilloscope or Power Meter? Try the ABUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
Receiver Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
Checking the R Channel Output (ET and ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
Checking the A Channel Output (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23
Checking the B Channel Output (ET and ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24
Switch Repeatability Check (ES Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-25
Accessories Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-26
Overall Instrument Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-27
Agilent 8719ES and Agilent 8720ES Standard, Option 007, 012, 085, 089, 1D5 . . . . . . .4-27
Agilent 8719ES and Agilent 8720ES Option 400, 012, 085, 1D5 . . . . . . . . . . . . . . . . . . . .4-28
Agilent 8722ES Standard, Option 007, 012, 085, 089, 1D5 . . . . . . . . . . . . . . . . . . . . . . . .4-29
Agilent 8722ES Option 400, 012, 089, 1D5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-30
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Agilent 8719ET and Agilent 8720ET Standard, Option 004 . . . . . . . . . . . . . . . . . . . . . . . 4-31
Agilent 8722ET Standard, Option 004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
5. Power Supply Troubleshooting
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Power Supply Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Simplified Block Diagram of Power Supply Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Start Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Check the Green LED and Red LED on the Preregulator (A15) . . . . . . . . . . . . . . . . . . . . 5-6
Check the Green LEDs on the Post Regulator (A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Measure the Post Regulator (A8) Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
If the Green LED of the Preregulator (A15) Is Off or Blinking . . . . . . . . . . . . . . . . . . . . . . . 5-8
Check the Line Voltage, Selector Switch, and Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
If the Red LED of the Preregulator (A15) Is On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Check the Post Regulator (A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Verify the Preregulator (A15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Check for a Faulty Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Check the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
Inspect the Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
If the Green LEDs of the Post Regulator (A8) Are Not All ON . . . . . . . . . . . . . . . . . . . . . . 5-13
Maintain A15W1 Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Check the Post Regulator (A8) Fuses and Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
Remove the Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Briefly Disable the Shutdown Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Inspect the Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Check the Fuses and Isolate A8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Fan Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Fan Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Check the Fan Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Short A8TP3 to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
Intermittent Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19
Power Supply Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
6. Digital Control Troubleshooting
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
CPU Board (A7) Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
A7 Switch Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Checking The CPU (A7) Red LED Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Display Troubleshooting (A18,A19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Evaluating Your Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Red, Green, or Blue Pixels Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Dark Pixels Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Newtons Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Troubleshooting the GSP (A19) and the Display (A18) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Measure the Supply Voltages Applied to the GSP (A19) . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
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Run Display Test 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Inspect Ribbon Cable Repeat Display Test 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Perform Walking One Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Run Display Tests 59-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12
Front Panel Troubleshooting (A1/A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-13
Check Front Panel LEDs After Preset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-13
Identify the Stuck Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-14
Inspect Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-17
Test Using a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-17
Run the Internal Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-18
If the Fault Is Intermittent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-20
Repeat Test Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-20
HP-IB Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-21
Digital Control Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-23
7. Source Troubleshooting
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Source Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
Start Troubleshooting Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
Power Not within Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Phase Lock Error Message Displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Broadband Phase Lock Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Swap IF Output Cables to Check R Sampler Assembly (A64) . . . . . . . . . . . . . . . . . . . . . . .7-9
Check Open Loop Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
Check Reference Board (A12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-13
Check Fractional-N Digital (A14) with ABUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
Check the Fractional-N Analog (A13) and Fractional-N Digital (A14) with a Spectrum Analyzer
7-15
Check the VCO (A14) Range with Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-16
Substituting Tuning Voltages to Check the VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17
Divide-by-N (A14) Circuit Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
A14-to-A13 Digital Control Signals Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
Pulse Generator (A52) Check with Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
Pulse Generator (A52) Check with Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . .7-21
Band-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-23
Broadband Power Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-27
ALC/Signal Separation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-27
Step Attenuator (A69) Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-28
8. Receiver Troubleshooting
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
All Signal Paths Look Abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
2nd LO Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
4 MHz Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-4
At Least One Signal Path Looks Normal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
Directional Coupler Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-8
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Contents
A and B Sampler Check by Substitution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Sampler Voltage Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
2nd Converter Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
9. Accessories Troubleshooting
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Inspect and Gauge Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Inspect the Error Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Isolate the Fault in the RF Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Verify the RF Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Verify Shorts and Opens by Substitution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
10. Service Key Menus and Error Messages
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
Service Menus - Internal Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Tests Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Test Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Self Diagnose Softkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10
Test Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10
Service Menu - Service Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Service Modes Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19
Service Modes More Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-21
Analog Bus on OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
Description of the Analog Bus (ANAB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
The Main ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
The Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
Analog In Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Analog Bus Nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24
PEEK/POKE Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31
Firmware Revision Softkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-32
HP-IB Service Mnemonic Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33
Invoking Tests Remotely . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33
Analog Bus Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34
Service Related Error Messages in Alphabetical Order . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-35
11. Error Terms
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2
Error Terms Can Also Serve a Diagnostic Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
Measurement Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
Error Term Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
If Error Terms Seem Worse than Typical Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-7
Uncorrected Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-8
Error Term Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-10
Directivity (EDF and EDR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-11
Source Match (ESF and ESR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Reflection Tracking (ERF and ERR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13
Isolation (Crosstalk, EXF and EXR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
x
Contents
Load Match (ELF and ELR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-15
Transmission Tracking (ETF and ETR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-16
12. Theory of Operation
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-2
System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-3
Functional Groups of the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-5
Power Supply Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-6
A15 Preregulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-6
A8 Post Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-7
Voltage Indications: the Green LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-8
Digital Control Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-9
A1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-9
A2 Front Panel Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-9
A7 CPU/A10 Digital IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-9
A18 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-10
A19 Graphics System Processor (GSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-11
A20 Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-11
A16 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-11
Source Group Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
Source Pretune . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
A14/A13 Fractional-N Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
A52 Pulse Generator: the Harmonic Comb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
A64 R Sampler: Down-Converting the Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
A11 Phase Lock: Comparing Phase and Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
Tuning the YIG Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
Phase Locked Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-15
A12 Reference: The Crystal Reference Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-16
Source Block: The YIG Oscillator Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-16
ALC: Automatic Leveling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-18
Signal Separation: ES Models Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-19
A58 M/A/D/S Modulator, Amplifier, Detector, Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . .12-19
A58 M/A/D and A74 Switch Splitter (Option 400 Only) . . . . . . . . . . . . . . . . . . . . . . . . . .12-20
A69 Step Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-20
A74 Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-21
A56 Lower Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-21
A60 and A61 DC Bias Tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-21
A62 and A63 Directional Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-21
Signal Separation: ET Models Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-22
A58 M/A/D/S Modulator, Amplifier, Detector, Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . .12-22
A69 Step Attenuator (All ET Option 004 Models). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-23
A23 DC Block (Agilent 8719ET Option 004 and Agilent 8720ET Option 004 Only). . . .12-23
A62 Directional Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-23
Receiver Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-24
Samplers and Second Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-24
A10 Digital IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-25
13. Replaceable Parts xi
Contents
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-2
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3
Rebuilt-Exchange Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-4
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-5
Replaceable Part Listings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-6
Top Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-8
Bottom Assemblies and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-12
Front RF Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-64
Top Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-66
Rear Cables, All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-69
Front Cables, All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-70
Front Panel Assembly, Inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-72
Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-74
Rear Panel Assembly, Option 1D5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-76
Hardware, Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-78
Hardware, Bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-80
Hardware, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-82
Hardware, Preregulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-83
Chassis Parts, Outside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-84
Chassis Parts, Inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-86
Miscellaneous Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-87
14. Assembly Replacement and Post-Repair Procedures
Information on This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
Assembly Replacement Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3
Procedures in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4
Replacing the Line Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-5
Removing the Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
Removing the top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
Removing the side covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
Removing the bottom cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-6
Removing the Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-8
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-8
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-8
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-8
Removing the Front Panel Interface and Keypad Assemblies . . . . . . . . . . . . . . . . . . . . . . 14-10
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-10
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-10
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-10
Removing the Display Lamp and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-12
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-12
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-12
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-12
Removing the Rear Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-14
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-14
xii
Contents
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-14
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-14
Removing the Rear Panel Interface Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-16
Removing the Source Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-18
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-18
Start Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-18
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-19
Removing the A7 CPU Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-20
Removing the A7BT1 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-22
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-22
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-22
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-22
Removing the A15 Preregulator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-24
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-24
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-24
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-24
Removing the A19 Graphics Processor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-26
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-26
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-26
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-26
Removing the A3 Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-28
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-28
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-28
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-28
Removing the A62, A63 Test Port Couplers and LED Board Assemblies . . . . . . . . . . . . .14-30
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-30
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-30
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-30
Removing the A26 High Stability Frequency Reference (Option 1D5) Assembly . . . . . . .14-32
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-32
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-32
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-32
Removing the B1 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-34
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-34
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-34
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-34
Post-Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-35
15. Safety and Regulatory Information
General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-2
Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-2
Shipment for Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-2
xiii
Contents
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
Lithium Battery Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6
Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6
Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6
Compliance with German FTZ Emissions Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Compliance with German Noise Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-9
xiv
3
Adjustments and Correction
Constants
3-1
Adjustments and Correction Constants
Information on This Chapter
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Information on This Chapter
The accuracy of the analyzer is achieved and maintained through mechanical adjustments, electrical adjustments, and correction constants (CCs). The correction constants are empirically derived data that are stored in memory and then recalled to refine the instrument's measurements and to determine its proper operation.
Anytime the CPU (A7) assembly is replaced, all of the correction constants must be regenerated and stored to the new CPU assembly board. Hewlett-Packard recommends that you store the correction constant data to 3.5 inch disk as a backup. The procedure for storing correction constant data to 3.5 inch disk can be found in “EEPROM Backup Disk
Procedure” on page 3-32 .
Additionally, there are adjustments and correction constants that must be performed following the replacement of an assembly. Refer to Table 14-1 on page 14-35 of
Chapter 14 , “Assembly Replacement and Post-Repair Procedures,” in order to determine which adjustments and correction constants procedures to perform.
3-2 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Information on This Chapter
This chapter contains the following adjustment procedures:
• A7 Switch Positions, on page 3-4
• Source Pretune Correction Constants (Test 43), on page 3-5
• Analog Bus Correction Constants (Test 44), on page 3-7
• IF Step Correction Constants (Test 47), on page 3-8
• ADC Offset Correction Constants (Test 48), on page 3-9
• Serial Number Correction Constants (Test 49), on page 3-10
• Protected Option Numbers Correction Constants (Test 50), on page 3-12
• Unprotected Hardware Option Correction Constants, on page 3-14
• Output Power Adjustments, on page 3-16
• Power Linearity Adjustment, on page 3-23
• Blanking Adjustment (Test 54), on page 3-29
• Initialize EEPROMs (Test 53), on page 3-31
• EEPROM Backup Disk Procedure, on page 3-32
• Correction Constants Retrieval Procedure, on page 3-34
• Loading Firmware, on page 3-35
• Reference Assembly VCO Tune Adjustment, on page 3-38
• Frequency Accuracy Adjustment, on page 3-40
• API Spur Avoidance and 100 kHz FM Sideband Adjustment, on page 3-43
• Raw Offset Correction Constants, on page 3-47
• Sampler Calibration Correction Constants (Test 51), on page 3-57
Service Guide 3-3
Adjustments and Correction Constants
A7 Switch Positions
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
A7 Switch Positions
The A7 switch allows you to set up your analyzer to alter correction constants (CCs).
NOTE
Before moving the A7 switch, perform “EEPROM Backup Disk Procedure,” on page 3-32 to save your correction constants.
Required Equipment and Tools
To move the switch position, use a non-metallic adjust tool, HP part number 8830-0024.
1. Remove the power cord from the analyzer.
2. Set the analyzer on its side.
3. Remove the two corner standoffs from the bottom of the instrument with the T-10
TORX screwdriver.
4. Loosen the captive screw on the bottom cover's back edge, with the T-15 TORX screwdriver.
5. Slide the cover toward the rear of the instrument.
CAUTION
Use proper ESD procedures when performing the following steps.
6. Move the A7 switch, as shown in Figure 3-1 .
• Move the A7 Switch to the ALT position before you run any of the correction constant adjustment routines. This is the position for altering the analyzer's correction constants.
• Move the A7 Switch to the NRM position after you have run correction constant adjustment routines. This is the position for normal operation.
7. Reconnect the power cord and switch on the instrument.
Figure 3-1 Switch Positions for A7 CPU Assembly
3-4 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Source Pretune Correction Constants (Test 43)
Source Pretune Correction Constants (Test 43)
This procedure generates pretune values for correct phase-locked loop operation.
Required Equipment
Equipment Description HP 8722ET/ES
Frequency counter
RF cable
HP 8719ET/ES
HP 8720ET/ES
HP 53150A
HP 5350B
HP 85131F
HP 53151A
HP 5351B
HP 85133F
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Connect the equipment as shown in Figure 3-2 and then press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU TESTS
ADJUSTMENT TESTS EXECUTE TEST YES
Figure 3-2 Source Pretune Correction Constants Setup
3. When the prompt,
Set source to 2.345 GHz, then continue appears, use the front panel knob to adjust the frequency of the analyzer source to within 5 MHz of
2.345 GHz. Press
CONTINUE
when the frequency is set.
4. For the HP 8722ET/ES, when the prompt
Set source to 19.550 GHz appears on the display,the continue
prompt appears next, use the front panel knob to adjust the frequency of the analyzer source to within 5 MHz of 19.550 GHz. Press
CONTINUE
when the frequency is set.
Service Guide 3-5
Adjustments and Correction Constants
Source Pretune Correction Constants (Test 43)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
5. When
Pretune Adj DONE
is displayed, press
Preset
.
6. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure” on page 3-32 .
In Case of Difficulty
If any error messages appear, refer to Chapter 7 , “Source Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
3-6 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Analog Bus Correction Constants (Test 44)
Analog Bus Correction Constants (Test 44)
This procedure calibrates the analog bus by using three reference voltages (ground,
+0.37 volts and +2.5 volts), then stores the calibration data as correction constants in
EEPROMs.
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU TESTS
44 x1
EXECUTE TEST YES
3. Observe the analyzer for the results of the adjustment routine:
• If the analyzer displays
ABUS Cor DONE
, you have completed this procedure.
• If the analyzer displays
ABUS Cor FAIL
, repeat the test.
4. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure” on page 3-32 .
In Case of Difficulty
• Refer to the Chapter 6 , “Digital Control Troubleshooting,” or contact the nearest
Hewlett-Packard sales or service office.
Service Guide 3-7
Adjustments and Correction Constants
IF Step Correction Constants (Test 47)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
IF Step Correction Constants (Test 47)
These correction constants compensate for IF amplifier linearity difference between gain stages.
Required Equipment and Tools
Equipment Description HP 8722ET/ES
RF cable
RF open
RF fixed attenuator
HP 8719ET/ES
HP 8720ET/ES
HP 85131F
HP part number
85052-60009
HP 8493C
Option 010,006,020
HP 85133F
HP part number
85052-60023
HP 8490D
Option 010,006,020
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU TESTS
47 x1
EXECUTE TEST YES CONTINUE
Follow the instructions on the display.
3. Observe the analyzer for the results of the adjustment routine:
If the message,
IF Step Cor DONE
is displayed, you have completed this procedure.
4. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
In Case of Difficulty
• If the message
CAUTION:TROUBLE! CHECK SETUP AND START OVER is displayed, check that the RF cable is connected from PORT 1 to PORT 2 (REFLECTION port and
TRANSMISSION port on the ET models). Then repeat this adjustment routine.
• If the analyzer continues to fail the adjustment routine, refer to Chapter 6 , “Digital
Control Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
3-8 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
ADC Offset Correction Constants (Test 48)
ADC Offset Correction Constants (Test 48)
These correction constants improve the dynamic accuracy by shifting small signals to the most linear part of the ADC quantizing curve.
Analyzer warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU TESTS
48 x1
EXECUTE TEST YES
NOTE
Test 48 takes about three minutes.
3. Observe the analyzer for the results of the adjustment routine:
• If the analyzer displays
ADC Ofs Cor DONE
, you have completed this procedure.
• If the analyzer displays
ADC Ofs Cor FAIL
, repeat the test.
4. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
In Case of Difficulty
• If the analyzer displays
ADC Ofs Cor FAIL after repeating the test, refer to Chapter 6 ,
“Digital Control Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
Service Guide 3-9
Adjustments and Correction Constants
Serial Number Correction Constants (Test 49)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Serial Number Correction Constants (Test 49)
This procedure stores the analyzer serial number in the A7 CPU assembly EEPROMs.
CAUTION
Perform this procedure only if the A7 CPU assembly has been replaced.
Analyzer warmup time: None.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Record the ten character serial number that is on the analyzer rear panel identification label.
NOTE
The serial number may also be entered using the optional external keyboard.
Plug the keyboard into the “DIN KYBD” connector on the rear panel and press
Preset
.
3. To erase the HP logo, press the following:
Preset
PRESET: FACTORY
Preset
Display
MORE TITLE ERASE TITLE
4. Enter the serial number by rotating the front panel knob to position the arrow below each character of the instrument serial number, and then pressing
SELECT LETTER
to enter each character. Enter a total of ten characters: two letters and eight digits.
Press
backspace key
if you make a mistake.
5. Press
DONE
when you have finished entering the title. Double check that the correct serial number appears in the title area. If you made a mistake at this point, return to step 3.
CAUTION
You cannot correct mistakes after you perform step 6, unless you contact the nearest Hewlett-Packard sales or service center, for a clear serial number keyword. Then you must perform “Protected Option Numbers Correction
Constants (Test 50)” and repeat this procedure.
6. Press
System
SERVICE MENU TESTS
49 x1
EXECUTE TEST YES
7. Observe the analyzer for the results of the routine:
.
If the analyzer displays the message
Serial Cor DONE
, you have completed this procedure.
8. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
3-10 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
In Case of Difficulty
Adjustments and Correction Constants
Serial Number Correction Constants (Test 49)
• If the analyzer does not display
DONE
, then the serial number that you entered in steps
3 and 4 did not match the required format or a serial number was already stored. Check the serial number recognized by the analyzer:
1. Press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU FIRMWARE REVISION
2. Look for the serial number displayed on the analyzer screen.
3. Rerun this adjustment test if the serial number is not displayed.
• If the analyzer continues to fail this adjustment routine, contact the nearest
Hewlett-Packard sales or service office.
Service Guide 3-11
Adjustments and Correction Constants
Protected Option Numbers Correction Constants (Test 50)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Protected Option Numbers Correction Constants (Test 50)
This procedure stores the instrument's protected option(s) information in A7 CPU assembly EEPROMs.
You can also use this procedure to remove the serial number. You will need a unique keyword from Hewlett-Packard. Refer to step 6 in “Serial Number Correction Constants
(Test 49),” on page 3-10 .
CAUTION
Perform this procedure only if the A7 CPU assembly has been replaced and the “Serial Number Correction Constants (Test 49)” procedure has been performed.
Analyzer warmup time: None
1. Remove the instrument bottom cover and record the keyword label(s) that are located on the exposed sheet metal next to the CPU assembly (A7). Note that the individual keyword for each option is installed in the instrument.
NOTE
If the instrument does not have a label, then contact the nearest
Hewlett-Packard sales or service office. Be sure to include the full serial number of the instrument.
2. Make sure the A7 Switch is in the alter position (ALT).
NOTE
The serial number may also be entered using the optional external keyboard.
Plug the keyboard into the “DIN KYBD” connector on the rear panel and press
Preset
.
3. To erase the HP logo, press the following:
Preset
PRESET: FACTORY
Preset
Display
MORE TITLE ERASE TITLE
CAUTION
Do not confuse “I” with “1” (one) or “O” with “0” (zero).
4. Enter the keyword by rotating the front panel knob to position the arrow below each character of the keyword, and then pressing
SELECT LETTER
to enter each letter.
Press
←
if you made a mistake.
5. Press
DONE
when you have finished entering the keyword.
3-12 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Protected Option Numbers Correction Constants (Test 50)
6. Press the following:
System
SERVICE MENU TESTS
50 x1
EXECUTE TEST YES
7. Observe the analyzer for the results of the adjustment routine:
• If the analyzer displays
Option Cor DONE
, you have completed this procedure.
8. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
In Case of Difficulty
• If the analyzer displays
Option Cor FAIL
, check the keyword used in step 4 and make sure it is correct. Pay special attention to the letters “I” or “O”, the numbers “1” or “0”.
Repeat this entire adjustment test.
• If the analyzer continues to fail the adjustment routine, refer to Chapter 6 , “Digital
Control Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
Service Guide 3-13
Adjustments and Correction Constants
Unprotected Hardware Option Correction Constants
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Unprotected Hardware Option Correction Constants
This procedure stores the instrument's unprotected option(s) information in A7 CPU assembly EEPROMs.
Analyzer warmup time: None.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Record the installed options that are printed on the rear panel of the analyzer.
3. Press
System
SERVICE MENU PEEK/POKE PEEK/POKE ADDRESS
.
4. For the address of each unprotected hardware option, refer to Table 3-1 . Enter the address for the specific installed hardware option that needs to be enabled or disabled.
Follow the address entry by pressing x1
.
• Pressing
POKE
−
1 x1
after an address entry enables the option.
• Pressing
POKE
0 x1
after an address entry disables the option.
Table 3-1 PEEK/POKE Addresses Unprotected Hardware Options
Hardware Option
1D5
004
HP 8722ET/ES
085
007
089
400
012
PEEK/POKE Address
1619001529
1619001531
1619001533
1619001534
1619001535
1619001536
1619001537
1619001538
5. Repeat steps 3 and 4 for all of the unprotected options that you want to enable or disable.
6. After you have entered all of the instrument's hardware options, press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU FIRMWARE REVISION
7. View the analyzer display for the listed options.
8. If no more correction constant routines are going to be performed, return the A7 Switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
3-14 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
In Case of Difficulty
Adjustments and Correction Constants
Unprotected Hardware Option Correction Constants
• If any of the installed options are missing from the list, return to step 2 and reenter the missing option(s).
• If the analyzer continues to fail, contact the nearest Hewlett-Packard sales or service office.
Service Guide 3-15
Adjustments and Correction Constants
Output Power Adjustments
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Output Power Adjustments
This procedure instructs you how to set the output power of your network analyzer across the frequency bands by adjusting potentiometers on the source interface board (A59).
Required Equipment and Tools
Equipment Description
Power Meter
Power Sensor
Adapter 3.5-mm (f) to 3.5-mm (f)
Adapter 2.4-mm (f) to 2.4-mm (f)
RF Cable
HP-IB Cable
Non-Metallic Adjustment Tool
Antistatic Wrist Strap
Antistatic Wrist Strap Cord
Static-control Table Mat and Earth
Ground Wire
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 436A, HP 437B, HP 438A
HP E4418A (HP EPM-441A) or
HP E4419A (HP EPM-442A)
HP 8485A HP 8487A
N/A HP part number
85052-60012
(part of HP 85052B)
N/A HP part number
85056-60006
(part of HP 85056A)
HP 85133F HP 85131F
HP 10833A
HP part number 8830-0024
HP part number 9300-1367
HP part number 9300-0980
HP part number 9300-0797
Analyzer warmup time: 30 minutes.
Preparing the Instrument
1. Make sure the A7 Switch is in the alter position (ALT).
2. Zero and calibrate the power meter.
3. With the analyzer turned off, remove the top two corner standoffs and the top cover.
4. Locate the metal source assembly cover that is on the top-left, front-side of the instrument.
3-16 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Output Power Adjustments
5. Unplug the flexible SMB cables coming out of the source assembly cover.
NOTE
The HP 8719ET/ES and the HP 8720ET/ES have two SMB cables. The
HP 8722ET/ES have four SMB cables. All cables are clearly marked for easy re-assembly.
6. Remove the 3 screws on source assembly cover and lift it off the frame.
7. Reattach the SMB cables to the proper connectors.
8. Turn the analyzer on. If it does not phase lock, check the cable connections.
Setting the Main Power DAC to Preset Values.
For each PEEK/POKE location listed in Table 3-2 , do the following:
1. Press the following:
Preset
PRESET: FACTORY
Preset
System
SERVICE MENU PEEK/POKE
2. Press
PEEK POKE ADDRESS
, enter the peek/poke address from Table 3-2 , and press x1
.
3. Press
POKE
, enter the poke value from Table 3-2 , and press
4. Repeat steps 2 and 3 for the remaining peek/poke addresses.
x1
.
Table 3-2 Main Power DAC Peek/Poke Location Table
DAC
Low power
Low power
Mid power
Mid power
High Power
High Power
Peek/Poke
Address
1619001442
1619001443
1619001444
1619001445
1619001446
1619001447
Poke Value for the
HP 8719ET/ES
HP 8720ET/ES
3
49
1
0
10
12
Poke Value for the
HP 8722ET/ES
1
200
5
172
10
12
NOTE
Your analyzer may display the message
CAUTION TEST PORT OVERLOAD,
REDUCE POWER
. Ignore this message and continue with the procedure.
Service Guide 3-17
Adjustments and Correction Constants
Output Power Adjustments
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Setting the Potentiometers to the Minimum Levels.
1. Locate the Source Interface board (A59). For locations of the potentiometers, see Figure 3-3 .
2. Set the low band power potentiometer (A59 R4) at the center of its range.
3. Set the offset potentiometers (A59 R70, R71, R80) to their full counter-clockwise position.
The end stops, on 10-turn potentiometers, are indicated by a clicking sound.
4. Set the slope potentiometers (A59 R86, R87, R88) to their full clockwise position.
Figure 3-3 Location of Output Power Adjustment Potentiometers
3-18 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjusting the Mid Band Power
1. Connect the equipment as shown in Figure 3-4 .
Figure 3-4 Setup for Output Power Adjustments
Adjustments and Correction Constants
Output Power Adjustments
Table 3-3 Output Power Adjustment Values
Model/Option
HP 8719ES and HP 8720ES
HP 8719ET and HP 8720ET
HP 8719ES Option 007
HP 8720ES Option 007
HP 8722ES
HP 8722ET
HP 8722ES Option 007
Power A
(dBm)
−
3
+2
−1
3
−
8
Power B
(dBm)
0
+5
−
10
−
5
2. Press the following:
Preset
Sweep Setup
POWER
PWR RANGE MAN POWER RANGES RANGE 0
Enter the value from the “Power A” column in Table 3-3 . Press x1
.
Service Guide 3-19
Adjustments and Correction Constants
Output Power Adjustments
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
3. Press
Sweep Setup
CW FREQ
2.56
G/n
.
4. To switch the power DAC on, press the following:
System
SERVICE MENU SERVICE MODES
SRC ADJUST MENU POWER DAC[ON]
1000 x1
5. Adjust the mid band power offset resistor (A59 R71) for a power meter reading that is equal to the value (
±
0.1 dB) listed under “Power A” in Table 3-3 .
6. Press
Sweep Setup
CW FREQ
20 G/n
.
7. Adjust the mid band power slope resistor (A59 R88) for a power meter reading that is equal to the value (
±0.
1 dB) listed under “Power A” in Table 3-3 .
8. The adjustments in step 5 and step 7 interact with each other, so repeat both adjustments until both are in specification.
Adjusting the Low Band Power
1. Press
50 M/
µ
.
2. Adjust the low band power offset resistor (A59 R70) for a power meter reading that is equal to the value (
±0.1
dB
)
, from the “Power A” column in Table 3-3 .
3. Press
2.3
G/n
.
4. Adjust the low band power slope resistor (A59 R86) for a power meter reading that is equal to the value (
±0.1
dB
)
, from the “Power A” column in Table 3-3 .
Adjusting the High Band Power (HP 8722ET/ES)
1. Press
20.1
G/n
.
2. Adjust the high band power offset resistor (A59 R80) for a power meter reading that is equal to the value (
±0.1
dB
)
, from the “Power A” column in Table 3-3 .
3. Press
40 G/n
.
4. Adjust the high band power slope resistor (A59 R87) for a power meter reading that is equal to the value (
±0.1
dB
)
, from the “Power A” column in Table 3-3 .
3-20 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Fine Tuning the Flatness
Adjustments and Correction Constants
Output Power Adjustments
1. Press
Preset
.
2. Press
POWER PWR RANGE MAN POWER RANGES RANGE 0
.
3. Enter the value from the “Power B” column, in Table 3-3 , for the particular analyzer that you are adjusting.
4. Press the following:
Sweep Setup
SWEEP TYPE MENU STEP SWEEP ON
Sweep Setup
NUMBER of POINTS
101 x1
Avg
IF BW
300 x1
Meas
INPUT PORTS R
Scale Ref .5
x1
5. Press
Local
SYSTEM CONTROLLER
Cal
PWRMTR CAL
.
6. Press
NUMBER of READINGS
2 x1
.
7. Press
ONE SWEEP TAKE CAL SWEEP
.
Wait for the analyzer to finish the power meter calibration.
8. Connect an RF cable between PORT 1 and PORT 2 (REFLECTION and
TRANSMISSION ports on the ET models).
9. Press
Save/Recall
SAVE STATE FILE UTILITIES RENAME FILE ERASE TITLE
rename file “PWRCAL” by rotating the front panel knob to position the arrow under the desired letter and press
SELECT LETTER
. When the file is renamed, press
DONE
.
10.Press
Cal
CALIBRATE MENU RECEIVER CAL
Meas
INPUT PORTS B
.
11.Enter the power value in “Power B” column of Table 3-3 and then press
TAKE RCVR CAL SWEEP
.
12.Switch off the power meter calibration by pressing the following:
Cal
PWRMTR CAL [ONE SWEEP] PWRMTR CAL OFF
The analyzer's trace now represents power flatness.
13.Adjust the slope and offset of all the bands for a flatness of:
•
±1.5
dB in the 0.05 GHz to 20 GHz range
•
±
2.5 dB in the 20 GHz to 40 GHz range
Service Guide 3-21
Adjustments and Correction Constants
Output Power Adjustments
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
In Case of Difficulty
• With the power meter connected to PORT 1 (REFLECTION port on the ET models), check for available power and modulator functionality by adjusting the power DAC from 0 to 4095.
The power should vary from
−
20 dB to +4 dB from the maximum specified power in most cases. (At some of the frequencies you may not be able to tune above maximum power.)
• If your analyzer is not operating correctly, as indicated from the results of the previous step, refer to Chapter 7 , “Source Troubleshooting,” or contact the nearest
Hewlett-Packard sales or service office.
3-22 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Power Linearity Adjustment
Power Linearity Adjustment
IMPORTANT
“Power Linearity Adjustment” is a continuation of “Output Power
Adjustments” on page 3-16 .
“Output Power Adjustments” must be performed first. The receiver calibration from “Output Power Adjustments” must be kept on before starting this test.
Preparatory Steps
1. If you haven't already done so, perform the “Output Power Adjustment” procedure.
2. Connect a cable between PORT 1 and PORT 2 (REFLECTION port and
TRANSMISSION port on the ET models).
3. Press
Power
and enter the power value listed as “P3” in Table 3-4 . Press x1
.
Table 3-4 Power Linearity Adjustment Values
Power
Settings
HP 8719ES
HP 8720ES
HP 8719ET
HP 8720ET
HP 8719ES Option 007
HP 8720ES Option 007
HP 8722ES
P1
1 5 dBm 10 dBm
−
5 dBm
P2
P3
−
5 dBm
−
15 dBm
−
0 dBm
10 dBm
−
−
10 dBm
20 dBm
1. P1 only applies to 20 GHz for the HP 8722ET/ES.
HP 8722ET
HP 8722ES Option 007
−
−
0 dBm
5 dBm
15 dBm
4. Press
Scale Ref .5
x1
REFERENCE VALUE
. Enter the power value listed as
“P3” in Table 3-4 , then press x1
MARKER MODE MENU MKR STATS ON
display.
. After the “P3” value is entered, press
Marker Fctn
. The marker stats will appear on the
The displayed trace should be centered on the reference (
±
0.5 dB).
• If the trace is not centered on the reference, continue with the next step.
• If the trace is centered on the reference, go to “Adjusting the Power Linearity” on page 3-24 .
Service Guide 3-23
Adjustments and Correction Constants
Power Linearity Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
5. To switch on the power DAC, press
System
SERVICE MENU SERVICE MODES
SRC ADJUST MENU PWR DAC ON
.
• For the HP 8719ET/ES or HP 8720ET/ES, press
258 x1
.
• For the HP 8722ET/ES, press
459 x1
.
6. Adjust the front panel knob until the mean value is equal to “P2”. Record the “MAIN
POWER DAC” number.
(Example: Power DAC# = 461).
7. To switch off the power DAC, press
PWR DAC OFF
.
8. Press
Save/Recall
SAVE STATE
.
9. Divide the previously recorded DAC number by 256.
(Example: 461/256)
10.To store the quotient, press the following:
System
SERVICE MENU PEEK/POKE
PEEK/POKE ADDRESS
1619001442 x1
POKE
Enter the quotient and then press x1
.
(Example quotient = 1)
11.To store the remainder by press the following:
PEEK/POKE ADDRESS
1619001443 x1
POKE
Enter the remainder and then press
(Example remainder = 205) x1
.
12.Press
Preset
.
13.Press
Save/Recall
RECALL STATE
. Verify that the mean is equal to the “P2” value.
Adjusting the Power Linearity
1. Press
Power
and enter the power level that is listed as “P3” in Table 3-4 .
Press x1 Cal
CALIBRATE MENU RECEIVER CAL TAKE RCVR CAL SWEEP
.
2. Press
Power then press x1
and enter the power level that is listed as “P2” in Table 3-4 ,
.
3-24 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Power Linearity Adjustment
3. Press
Scale Ref
REFERENCE VALUE
3-4 , and then press x1
.
and enter the value listed as “P2” in Table
The displayed trace should be centered on the reference (
±
0.5 dB).
• If the trace is not centered on the reference, continue with the next step.
• If the trace is centered on the reference, go to “Entering the Power Levels” .
4. To switch on the power DAC, press the following:
System
SERVICE MENU SERVICE MODES
SRC ADJUST MENU PWR DAC ON
2580 x1
5. Adjust the front panel knob until the mean value is P2. Record the “MAIN POWER
DAC” number.
6. To switch off the power DAC, press
PWR DAC OFF
.
7. Press
Save/Recall
SAVE STATE
.
8. Divide the previously recorded DAC number by 256.
9. To store the quotient, press the following:
System
SERVICE MENU PEEK/POKE
PEEK/POKE ADDRESS
1619001444 x1
POKE
Enter the quotient and then press x1
.
10.To store the remainder, press the following:
PEEK/POKE ADDRESS
1619001445 x1
POKE
Enter the remainder and then press x1
.
11.Press
Preset
.
12.Press
Save/Recall
RECALL STATE
and verify the mean value is equal to “P2.”
Entering the Power Levels
13.Enter the Power levels.
For HP 8719ET/ES and HP 8720ET/ES Models:
Press
Power
and enter the power level that is listed as “P2” in Table 3-4 .
Press x1 Cal
CALIBRATE MENU RECEIVER CAL TAKE RCVR CAL SWEEP
.
Service Guide 3-25
Adjustments and Correction Constants
Power Linearity Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
For HP 8722ET/ES Models:
Press
Stop 20 G/n
.
Press
Power
and enter the power level that is listed as “P2” in Table 3-4 .
Press x1 Cal
CALIBRATE MENU RECEIVER CAL TAKE RCVR CAL SWEEP
.
14.Press
Power then press x1
and enter the power level that is listed as “P2” in Table 3-4 ,
.
15.Press
Scale Ref
REFERENCE VALUE
and then press x1
.
and enter the value listed as “P1” in
The displayed trace should be centered on the reference (
±
0.5 dB).
Table 3-4
• If the trace is not centered on the reference, continue with the next step.
• If the trace is centered on the reference, go to “Low Band Adjustment” on page 3-27 .
16.To switch on the power DAC, press the following:
System
SERVICE MENU SERVICE MODES
SRC ADJUST MENU PWR DAC ON
2580 x1
17.Adjust the front panel knob until the mean value is P1. Record the “MAIN POWER
DAC” number.
18.To switch off the power DAC, press
PWR DAC OFF
.
19.Press
Save/Recall
SAVE STATE
.
20.Divide the previously recorded DAC number by 256.
21.To store the quotient, press the following:
System
SERVICE MENU PEEK/POKE
PEEK/POKE ADDRESS
1619001446 x1
POKE
Enter the quotient and then press x1
.
22.To store the remainder, press the following:
PEEK/POKE ADDRESS
1619001447 x1
POKE
Enter the remainder and then press x1
.
23.Press
Preset
.
24.Press
Save/Recall
RECALL STATE
and verify the mean value is equal to “P1.”
3-26 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Low Band Adjustment
1. Connect the equipment as shown in Figure 3-5 .
Figure 3-5 Setup for Power Adjustments
Adjustments and Correction Constants
Power Linearity Adjustment
Table 3-5 Low Band Adjustment Values
Model Power A
HP 8719ES and HP 8720ES
−
3 dBm
2
dBm HP 8719ET and HP 8720ET
HP 8719ES Option 007
HP 8720ES Option 007
HP 8722ES
HP 8722ET
HP 8722ES Option 007
−
13 dBm
−
8 dBm
Power B
10 dBm
15 dBm
−
5 dBm
0 dBm
Power C
7
dBm
12
dBm
−
8 dBm
−
3 dBm
2. Press the following:
Preset
PRESET FACTORY
Preset
System
SERVICE MENU
SERVICE MODES SRC ADJUST MENU ALC OFF
Stop 2.54
G/n
Meas
INPUT PORTS R
Power
, enter the power level from “Power A” in Table 3-5 , then press x1
Cal
PWR MTR CAL ONE SWEEP TAKE CAL SWEEP
Service Guide 3-27
Adjustments and Correction Constants
Power Linearity Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
3. Connect the cable to PORT 2 (TRANSMISSION Port on ET models) and press the following:
Cal
CALIBRATE MENU RECEIVER CAL
Meas
INPUT PORTS B
4. Press
Power
, and enter the power level from “Power B” in Table 3-5 , then press x1
5. Adjust A59R4 until the minimum value of the trace on the display equals “Power C” in
Table 3-5 . For the location of A59R4, see Figure 3-3, on page 3-18 .
.
6. If no more correction constant routines are going to be performed, return the A7 switch to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
In Case of Difficulty
• If the analyzer fails the “Power Linearity Performance Test” do the following:
— If the analyzer fails the performance test for the power levels listed as P2, P3, repeat the “Power Linearity Adjustment.”
— If the analyzer fails the performance test for the power level listed as P2, repeat the
“Output Power Adjustment” and the “Power Linearity Adjustment.”
• If the analyzer is still not passing the “Power Linearity Performance Test,” check for available power and modulator functionality by adjusting the power DAC from 0 to
4095 (refer to the “Output Power Adjustments” procedure).
The power should vary from
−
20 dB to +4 dB from the maximum specified power in most cases. (At some of the frequencies you may not be able to tune above maximum power.)
— If the analyzer is operating correctly, as indicated from the results of the previous step, repeat the “Output Power Adjustments” procedure.
— If the analyzer is not operating correctly, as indicated from the results of the previous step, refer to Chapter 7 , “Source Troubleshooting,” or contact the nearest
Hewlett-Packard sales or service office.
3-28 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Blanking Adjustment (Test 54)
Blanking Adjustment (Test 54)
This adjustment sets the output power level during retrace. If incorrectly adjusted, the first data points in a sweep may not be stable.
Required Equipment and Tools
Equipment Description
Power Meter
Power Sensor
Adapter 3.5-mm (f) to 3.5-mm (f)
Adapter 2.4-mm (f) to 2.4-mm (f)
Non-Metallic Adjustment Tool
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 436A, HP 437B, HP 438A
HP E4418A (HP EPM-441A) or
HP E4419A (HP EPM-442A)
HP 8485A HP 8487A
N/A HP part number
85052-60012
(part of HP 85052B)
N/A HP part number
85056-60006
(part of HP 85056A)
HP part number 8830-0024
Analyzer warmup time: 30 minutes.
Power meter warmup time: 30 minutes.
Preparing the Instrument
1. With the analyzer turned off, remove the top two corner standoffs and the top cover.
2. Locate the metal source assembly cover that is on the top-left, front-side of the instrument.
3. Unplug the flexible SMB cables coming out of the source assembly cover.
NOTE
The HP 8719ET/ES and the HP 8720ET/ES have 2 SMB cables. The
HP 8722ET/ES have 4 SMB cables. All cables are clearly marked for easy re-assembly.
4. Remove the 3 screws on source assembly cover and lift it off the frame.
5. Reattach the SMB cables to the proper connectors.
6. Turn the analyzer on. If it does not phase lock, check the cable connections.
7. Zero and calibrate the power meter and connect the power sensor to PORT 1
(REFLECTION port on the ET models).
Service Guide 3-29
Adjustments and Correction Constants
Blanking Adjustment (Test 54)
8. Press
Preset
FACTORY: PRESET
Preset Sweep Setup
CW FREQ
50.5
M/
µ
.
9. Press
System
SERVICE MENU TESTS
54 x1
EXECUTE TEST
.
10.For the location of the blanking adjustment, refer to Figure 3-6 . Adjust it to obtain the value indicated on the analyzer display.
11.When the adjustment is complete, press
CONTINUE
.
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Figure 3-6 Location of Blanking Adjustment
In Case of Difficulty
If you are unable to perform this adjustment, refer to Chapter 7 , “Source
Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
3-30 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Initialize EEPROMs (Test 53)
Initialize EEPROMs (Test 53)
This internal service test performs the following functions:
• destroys all correction constants and all unprotected options
• initializes certain EEPROM address locations to zeroes
• replaces the display intensity correction constants with default values
NOTE
This routine will not alter the serial number or protected option number correction constants (Tests 49 and 50, respectively).
a. Press the following:
Preset
FACTORY: PRESET
Preset
System
SERVICE MENU
TESTS
53 x1
EXECUTE TEST YES
12. Restore the analyzer’s correction constants by referring to the “Correction Constants
Retrieval Procedure” on page 3-34 .
13. If you don't have the correction constants backed up on a disk, run all the internal service routines in the following order: a.
Unprotected Hardware Option Correction Constants, on page 3-14 b.
Analog Bus Correction Constants (Test 44), on page 3-7 c.
Source Pretune Correction Constants (Test 43), on page 3-5 d.
ADC Offset Correction Constants (Test 48), on page 3-9 e.
IF Step Correction Constants (Test 47), on page 3-8 f.
Raw Offset Correction Constants, on page 3-47 g.
Sampler Calibration Correction Constants (Test 51), on page 3-57
Service Guide 3-31
Adjustments and Correction Constants
EEPROM Backup Disk Procedure
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
EEPROM Backup Disk Procedure
The correction constants that are unique to your instrument are stored in EEPROM on the
CPU (A7) assembly. By creating an EEPROM backup disk, you will have a copy of all the correction constant data for that analyzer, should you need to replace the
CPU (A7) assembly in the future.
Required Equipment and Tools
Equipment Description
3.5-inch Floppy Disk
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 92192A (box of 10)
1. Insert a 3.5-inch disk into the analyzer disk drive.
2. If the disk is not formatted, follow these steps: a. Press the following:
Preset
FACTORY: PRESET
Preset
Save/Recall
FILE UTILITIES FORMAT DISK
b. Select the format type:
• To format a LIF disk, select
FORMAT:LIF
.
• To format a DOS disk, select
FORMAT:DOS
.
c. Press
FORMAT INT DISK
and answer
YES
at the query.
3. Press the following:
System
SERVICE MENU SERVICE MODES
MORE STORE EEPR ON
Save/Recall
SELECT DISK INTERNAL DISK
RETURN SAVE STATE
NOTE
The analyzer creates a default file “FILE00”. The filename appears in the upper-left corner of the display. The file type “ISTATE(E)” indicates that the file is an instrument state with EEPROM backup.
3-32 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
EEPROM Backup Disk Procedure
NOTE
If you are using a external keyboard to enter data, you must press after plugging it in the DIN keyboard connector on the rear panel.
Preset
4. Press
FILE UTILITIES RENAME FILE ERASE TITLE
. Use the front panel knob and the
SELECT LETTER
softkey (or an external keyboard) to rename the file
“FILE00” TO “N12345” where 12345 represents the last 5 digits of the instrument's serial number. (The first character in the filename must be a letter). When you are finished renaming the file, press
DONE
.
5. Write the following information on the disk label:
• analyzer serial number
• date backup was made
• “EEPROM Backup Disk”
In Case of Difficulty
• Insert another disk in to the analyzer disk drive and press
Save/Recall
.
• The analyzer should display a catalog of the disk contents. If the catalog does not appear, refer to Chapter 6 , “Digital Control Troubleshooting,” or contact the nearest
Hewlett-Packard sales or service office.
Service Guide 3-33
Adjustments and Correction Constants
Correction Constants Retrieval Procedure
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Correction Constants Retrieval Procedure
By using the current EEPROM backup disk, you can download the correction constants into your network analyzer.
Required Equipment and Tools
You will need your analyzer’s current EEPROM backup disk.
Analyzer warmup time: None required
1. Make sure the A7 Switch is in the alter position (ALT).
2. Insert the your current analyzer’s “EEPROM backup disk” into the analyzers disk drive.
3. Press
Save/Recall
SELECT DISK INTERNAL DISK
. Use the front panel knob to highlight the file “N12345” where N12345 represents the file name of the EEPROM backup disk for the analyzer. On the factory shipped EEPROM backup disk, the filename is FILE1.
4. Press
RETURN RECALL STATE
analyzer’s EEPROMs.
to download the correction constants data into the
5. Perform the procedure, “Unprotected Hardware Option Correction Constants” on page 3-14 .
6. Press
Preset
FACTORY: PRESET
Preset by performing a simple measurement.
and verify that good data was transferred
7. If no more correction constant routines are going to be performed, return the A7 switch back to its normal position (NRM).
In Case of Difficulty
• Insert another disk in to the analyzer disk drive and press
Save/Recall
.
• The analyzer should display a catalog of the disk contents. If the catalog does not appear, refer to Chapter 6 , “Digital Control Troubleshooting,” or contact the nearest
Hewlett-Packard sales or service office.
3-34 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Loading Firmware
Loading Firmware
The following procedures will load firmware for new or existing CPU boards.
Required Equipment and Tools
• Firmware disk for your network analyzer.
Analyzer warmup time: None required.
Loading Firmware into an Existing CPU
Use this procedure for upgrading firmware in an operational instrument whose CPU board has not been changed.
1. Turn off the network analyzer.
2. Insert the firmware disk into the instrument's disk drive.
3. Turn the instrument on. The firmware will be loaded automatically during power-on.
The front panel LEDs should step through a sequence as firmware is loaded. The display will be blank during this time.
At the end of a successful loading, the LEDs for Channel 1 and PORT 1 (REFLECTION port on ET models) will remain on and the display will indicate the version of firmware that was loaded.
In Case of Difficulty
If the firmware did not load successfully, LED patterns on the front panel can help you isolate the problem.
• If the following LED pattern is present, the firmware disk is not for use with your instrument model. Check that the firmware disk matches your analyzer model.
Chan 1
✸
Chan 2
✸
Chan 3
LED Pattern
Chan 4 R L T S
• If any of the LED patterns in the table on page 3-36 are present, the firmware disk may be defective.
Service Guide 3-35
Adjustments and Correction Constants
Loading Firmware
Chan 1
✸
✸
Chan 2
✸
✸
Chan 3
LED Pattern
Chan 4
✸
✸
✸
R
✸
L
✸
✸
✸
✸
✸
✸
✸
✸
✸
✸
✸ ✸
• If any other LED pattern is present, the CPU board is defective.
✸
✸
✸
✸
✸
✸
✸
T
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
S
✸
✸
Loading Firmware into a New CPU
When the CPU board has been replaced in the analyzer, use this procedure to load the firmware.
1. Turn off the network analyzer.
2. Insert the firmware disk into the instrument's disk drive.
3. Turn the instrument on. The firmware will be loaded automatically during power-on.
The front panel LEDs should step through a sequence as firmware is loaded. The display will be blank during this time.
At the end of a successful loading, the LEDs for Channel 1 and PORT 1 (REFLECTION port on ET models does NOT have an LED) will remain on and the display will indicate the version of firmware that was loaded.
3-36 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
In Case of Difficulty
Adjustments and Correction Constants
Loading Firmware
If the firmware did not load successfully, LED patterns on the front panel can help you isolate the problem.
• If the following LED pattern is present, an acceptable firmware filename was not found on the disk. (The required format for a firmware file name is 8720ET_07._60 or
8720ES_07._60). Check that the firmware disk matches your network analyzer model.
Chan 1 Chan 2 Chan 3
✸
LED Pattern
Chan 4 R L T S
• If any of the following LED patterns are present, the firmware disk may be defective.
Chan 1 Chan 2
✸
✸
✸
✸
Chan 3
LED Pattern
Chan 4
✸
✸
✸
R
✸
L
✸
✸
✸
✸
✸
✸
✸
✸
✸
✸
✸ ✸
• If any other LED pattern is present, the CPU board is defective.
✸
✸
✸
✸
✸
✸
✸
T S
✸
✸
NOTE
If firmware did not load, a red LED on the CPU board will be flashing.
If the following LED pattern is present on the CPU board, suspect the disk drive or associated cabling:
✸ ✸ ✸ ✸ ✸
(front of instrument
⇓
)
Service Guide 3-37
Adjustments and Correction Constants
Reference Assembly VCO Tune Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Reference Assembly VCO Tune Adjustment
This adjustment centers the reference assembly voltage controlled oscillator (VCO) in its tuning range.
Required Equipment and Tools
Equipment Description
Extender board, large
SMB (m) to SMB (f) Extension Cables
Non-Metallic Adjustment Tool
All Models
HP part number 08720-60151
(Part of tool kit HP part number
08722-60018)
HP part number 8120–5040
HP part number 8830-0024
Analyzer warmup time: 30 minutes.
1. Switch off the analyzer.
2. Remove the upper corner standoffs and the instrument top cover. In order to access the
VCO TUNE adjustment screw on the Reference (A12) assembly, install the Reference assembly onto the extender board. Use SMB extension cables as required (the EXT REF cable need not be reconnected now). The Reference (A12) assembly is the PC board with the red tabs.
3. Press the following:
Preset
FACTORY: PRESET
Preset
Sweep Setup
CW FREQ SWEEP TIME [AUTO]
2 x1 System
SERVICE MENU ANALOG IN Aux Input
Meas
ANALOG IN Aux Input
ANALOG BUS
15 x1
to display
VCO Tune
.
4. Press
MARKER
and
Scale Ref
SCALE / DIV
.5
x1
.
3-38 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Figure 3-7 VCO Tune Adjustment Location
Adjustments and Correction Constants
Reference Assembly VCO Tune Adjustment
5. Adjust VCO TUNE with a non-metallic adjustment tool to 0.0 V
±
500 mV (within one division of the reference line).
The adjustment is sensitive, and if out of adjustment may display an irregular waveform. If so, slowly tune through the entire adjustment range to obtain a flat trace, then carefully tune for 0.0 V. Once the adjustment is done, it should be rechecked with the reference board reinstalled in the instrument, and at operating temperature.
In Case of Difficulty
If VCO TUNE cannot be adjusted as specified, and the instrument passes the Analog Bus
Correction Constants (Test 44) adjustment, the Reference (A12) assembly must be replaced or contact the nearest Hewlett-Packard sales or service office.
Service Guide 3-39
Adjustments and Correction Constants
Frequency Accuracy Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Frequency Accuracy Adjustment
This adjustment sets the voltage controlled crystal oscillator (VCXO) frequency to maintain the instrument's frequency accuracy.
Required Equipment and Tools
Equipment Description
Frequency Counter
RF cable
Non-metallic Adjustment Tool
Antistatic Wrist Strap
Antistatic Wrist Strap Cord
Static-control Table Mat and Earth
Ground Wire
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 53150A or
HP 5350B
HP 53151A or
HP 5351B
HP 85131F HP 85133F
HP part number 8830-0024
HP part number 9300-1367
HP part number 9300-0980
HP part number 9300-0797
Network Analyzer warmup time: 30 minutes.
1. Remove the upper corner standoffs and analyzer top cover.
2. Connect the equipment as shown in Figure 3-8 .
IMPORTANT
Make sure that the frequency counter and network analyzer references are
not connected.
Figure 3-8 Frequency Accuracy Adjustment Setup
3-40 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Frequency Accuracy Adjustment
NOTE
For Option 1D5 Instruments Only: Remove the rear panel BNC to BNC jumper that is connected between the “EXT REF” and the “10 MHz Precision
Reference,” as shown in Figure 3-10 .
3. Press
Preset
FACTORY: PRESET
Preset Sweep Setup
CW FREQ
frequency: and select the
• For the HP 8719ET/ES, press
13.5
G/n
.
• For the HP 8720ET/ES, press
20 G/n
.
• For the HP 8722ET/ES, press
26 G/n
.
4. No adjustment is required when the frequency counter measurement results are within specification:
•
±
135 kHz for HP 8719ET/ES
•
±
200 kHz for HP 8720ET/ES
•
±
260 kHz for HP 8722ET/ES
Otherwise, locate the Reference (A12) assembly (red extractors) and adjust the VCXO
ADJ (see Figure 3-9 ) for a frequency measurement within specifications.
Figure 3-9 Location of the VCXO ADJ Adjustment
Service Guide 3-41
Adjustments and Correction Constants
Frequency Accuracy Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
NOTE
To increase the accuracy of this adjustment, steps 5 and 6 are recommended.
5. Replace the instrument covers and wait 15 minutes to allow the analyzer to reach its precise operating temperature.
6. Recheck the CW frequency and adjust if necessary.
Instruments with Option 1D5 Only
7. Reconnect the BNC to BNC jumper between the “EXT REF” and the “10 MHz Precision
Reference” as shown in Figure 3-10 .
Figure 3-10 High Stability Frequency Adjustment Location
8. Insert a narrow screwdriver and adjust the high-stability frequency reference potentiometer for a CW frequency measurement within specification.
In Case of Difficulty
• If you cannot adjust the CW frequency within specification, replace the Reference (A12) assembly or contact the nearest Hewlett-Packard sales or service office.
3-42 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
API Spur Avoidance and 100 kHz FM Sideband Adjustment
API Spur Avoidance and 100 kHz FM Sideband Adjustment
This adjustment minimizes the spurs caused by the API (analog phase interpolator, on the fractional-N assembly) circuits. It also improves the sideband characteristics.
Required Equipment and Tools
Equipment Description
Spectrum Analyzer
RF cable 50 ohm,Type N, 24 inch
RF cable 50 ohm, 24 inch BNC type
Non-metallic Adjustment Tool
Adapter 2.4-mm (f) to Type-N (f)
Adapter 3.5 mm (f) to Type-N (f)
Antistatic Wrist Strap
Antistatic Wrist Strap Cord
Static-control Table Mat and Earth
Ground Wire
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 8591E Opt. 130
HP 11500C
HP part number 8120-2582
HP part number 8830-0024
N/A
HP part number
1250-1745
HP 11903B
N/A
HP part number 9300-1367
HP part number 9300-0980
HP part number 9300-0797
Network Analyzer warmup time: 30 minutes.
Spectrum Analyzer warmup time: 30 minutes.
FM Sideband Adjustment (100 kHz Spurs)
1. The object of this test is to make the spur levels for all 3 frequencies equal. Connect the equipment as in Figure 3-11 .
Service Guide 3-43
Adjustments and Correction Constants
API Spur Avoidance and 100 kHz FM Sideband Adjustment
Figure 3-11 Test Set Up for Sideband Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
2. Set the spectrum analyzer measurement parameters to the values in Table 3-6 :
Table 3-6 Spectrum Analyzer Set Up Values
Parameter
Reference Level
Scale
Attenuator (ATTN)
Video Bandwidth (VBW)
Resolution Bandwidth (RBW)
Span
Value
0 dBm
10 dB/division
10 dB
1 kHz
300 Hz
100 Hz
3. On the spectrum analyzer, press
FREQ Center FREQ
spectrum analyzer frequency from # 1 from Table 3-7
and enter the
, press
MHZ
.
Table 3-7 Frequency Inputs
Frequency
# 1
# 2
# 3
Network Analyzer
Frequency
386 MHZ
530 MHZ
698 MHZ
Spectrum Analyzer
Frequency
385.899997 MHZ
529.899997 MHZ
697.899997 MHZ
3-44 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
API Spur Avoidance and 100 kHz FM Sideband Adjustment
4. On the network analyzer, press
Preset
FACTORY: PRESET
Preset Sweep Setup
CW FREQ
M/
µ
.
and enter the network analyzer frequency #1 from Table 3-7 , then press
5. Refer to Figure 3-12 , and adjust the 100 kHz (A13R77) for a null (minimum amplitude) on the spectrum analyzer. The minimum signal may drop down into the noise floor.
Figure 3-12 Location of API and 100 kHz Adjustments
6. Repeat steps 4 through 6 for frequencies # 2 and # 3 from Table 3-7 , using the same adjustment (A13R77).
API Adjust
1. On the spectrum analyzer, set the Video Resolution Bandwidth (VBW) to 10 Hz and the
Resolution Bandwidth to 30 Hz.
2. On the spectrum analyzer, set the center frequency for 910.063 MHz.
3. On the network analyzer, press
CW FREQ
910.060
M/
µ
.
4. Adjust the API1 (A13R35) for a null (minimum amplitude) on the spectrum analyzer.
5. On the spectrum analyzer, set the center frequency for 910.009 MHz.
6. On the network analyzer, press
CW FREQ
910.006
M/
µ
.
7. Adjust the API2 (A13R43) for a null (minimum amplitude) on the spectrum analyzer.
8. On the spectrum analyzer, set the center frequency for 910.0036 MHz.
9. On the network analyzer, press
CW FREQ
910.0006
M/
µ
.
Service Guide 3-45
Adjustments and Correction Constants
API Spur Avoidance and 100 kHz FM Sideband Adjustment
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
10.Adjust the API3 (A13R45) for a null (minimum amplitude) on the spectrum analyzer.
11.On the spectrum analyzer, set the center frequency for 910.00306 MHz.
12.On the network analyzer, press
CW FREQ
910.00006
M/
µ
.
13.Adjust the API4 (R47) for a null (minimum amplitude) on the spectrum analyzer.
In Case of Difficulty
• If this adjustment cannot be performed satisfactorily, repeat the entire procedure.
• If the analyzer repeatedly fails this adjustment, replace the A13 board assembly or contact the nearest Hewlett-Packard sales or service office.
3-46 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Raw Offset Correction Constants
Raw Offset Correction Constants
This procedure sets the raw offsets for the A,B, and R channels, in preparation for performing the “Sampler Calibration Correction Constants (Test 51),” on page 3-57 .
Required Equipment and Tools
Equipment Description
Power Meter
Power Sensor
Adapter 3.5-mm (f) to 3.5-mm (f)
Adapter 2.4-mm (f) to 2.4-mm (f)
RF Cable Set
RF Open
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 436A, HP 437B, HP 438A
HP E4418A (HP EPM-441A) or
HP E4419A (HP EPM-442A)
HP 8485A HP 8487A
N/A HP part number
85052-60012
(part of HP 85052B)
N/A
HP 85131F
HP part number
85056-60006
(part of HP 85056A)
HP 85133F
HP part number
85052-60009
(Part of HP 85052B)
HP part number
85056-60023
(Part of HP 85056A)
Analyzer and power meter warmup time: 30 minutes.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Zero and calibrate the power meter.
3. Connect the equipment as shown in Figure 3-13 .
Service Guide 3-47
Adjustments and Correction Constants
Raw Offset Correction Constants
Figure 3-13 Setup for the R Channel (ET/ES Models)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Raw Offset for the R Channel (ET/ES Models)
1. Press the following:
Preset
FACTORY PRESET
Preset
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
Stop 10 G/n
Meas
INPUT PORTS R
Marker Search
SEARCH: MAX
Note the maximum frequency and write it down.
2. Press
Sweep Setup
CW FREQ
, and enter the maximum frequency point from step 1.
Press
G/n Marker Search
SEARCH: MAX
.
Note the maximum marker reading (MMR) and write it down.
3. Enter the power sensor calibration factor for the maximum frequency point into the power meter.
NOTE
Refer to the power sensor manual for instructions on how to enter a calibration factor into the power meter. If the exact frequency is not listed on the power sensor, use a value that is between the two nearest points.
3-48 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Raw Offset Correction Constants
4. The objective is to set the maximum marker reading (MMR) to 4 dB higher than the power meter reading. Perform the following mathematical operation.
a. Calculate the difference (
∆
) between the power meter reading (PMR) and the maximum marker reading (MMR) and then add 4.
∆
= (PMR + 4)
−
MMR
NOTE
The
∆ can be a positive or negative value.
5. If the magnitude of
∆
is less than 0.15 dB, then the offset for the R channel is correctly set. For ES models go to “Raw Offset for the A and B Channels (ES Models)” on page 3-50 . For ET Models go to “Raw Offsets for the A and B Channels (ET Models)” on page 3-53 . If the magnitude is greater than 0.15 dB, continue to the next step.
6. Press the following:
System
SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001376 x1
PEEK
Note the PEEK value displayed under the
PEEK
label.
7. Calculate the new value by adding the PEEK value to
∆
multiplied by 4.
new value = current value +
(∆
X 4)
NOTE
Round the new value to the nearest integer.
8. Press
Poke
and enter the new value, press x1
.
9. To get the analyzer to use the new poke value, press
10.Press the following:
Preset
.
Meas
INPUT PORTS R
Sweep Setup
CW FREQ
and enter the frequency from step 1.
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
x1
MARKER SEARCH SEARCH:MAX
The maximum marker reading is MMR.
Service Guide 3-49
Adjustments and Correction Constants
Raw Offset Correction Constants
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
11.Recalculate
∆ by taking the power meter reading (PMR), adding 4 and then subtracting the maximum marker reading (MMR).
∆
= (PMR + 4)
−
(MMR)
If the magnitude of
∆
is less than 0.15 dB, then the offset for the R channel is correctly set. For ES models go to “Raw Offset for the A and B Channels (ES Models)” on page 3-50 . For ET Models go to “Raw Offsets for the A and B Channels (ET Models)” on page 3-53 . If the magnitude is greater than 0.15 dB, repeat steps 1 through 11 until the
R channel raw offset correction constant is achieved.
Raw Offset for the A and B Channels (ES Models)
1. Connect the equipment as shown in Figure 3-14 .
Figure 3-14 Setup for the A and B Channels (ES Models)
2. Press the following:
Preset
Meas
INPUT PORTS A
TESTPORT 2
Stop 10 G/n
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
Marker Search
SEARCH: MAX
Note the frequency and write it down.
3. Press
Sweep Setup
CW FREQ
, and enter the maximum frequency point from step 2.
Press
G/n Marker Search
SEARCH: MAX
. Note the maximum marker reading (MMR) and write it down.
Press
Power
. Note the displayed test port power (TPP) and write it down.
3-50 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Raw Offset Correction Constants
4. The objective is to set the maximum marker reading (MMR) to 4 dB higher than the test port power. Perform the following mathematical operation.
a. Calculate the difference (
∆
) between the test port power (TPP) and the maximum marker reading (MMR) and then add 4.
∆
= (TPP + 4)
−
MMR
NOTE
The
∆ can be a positive or negative value.
5. If the magnitude of
∆
is less than 0.15 dB, then the offset for the A channel is correctly set. Go to “Raw Offset for the B Channel (ES Models)” on page 3-52 . If the magnitude is greater than 0.15 dB, continue to the next step.
6. Press the following:
System
SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001372 x1
PEEK
Note the PEEK value displayed under the
PEEK
label.
7. Calculate the new value by adding the PEEK value to
∆
multiplied by 4.
new value = current value +
(∆
X 4)
NOTE
Round the new value to the nearest integer.
8. Press
Poke
and enter the new value into the poke address; press x1
.
9. To get the analyzer to use the new poke value, press
10.Press the following:
Preset
.
Meas
INPUT PORTS A
Sweep Setup
CW FREQ
and enter the frequency from step 2.
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
x1
MARKER SEARCH SEARCH:MAX
The maximum marker reading is MMR.
11.Recalculate
∆
by taking the test port power (TPP), adding 4 and then subtracting the maximum marker reading (MMR).
∆
= (TPP + 4)
−
(MMR)
If the magnitude of
∆
is less than 0.15 dB, then the offset for the A channel is correctly set. Go to “Raw Offset for the B Channel (ES Models)” on page 3-52 . If the magnitude is greater than 0.15 dB, repeat steps 2 through 11 until the A channel raw offset correction constant is achieved.
Service Guide 3-51
Adjustments and Correction Constants
Raw Offset Correction Constants
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Raw Offset for the B Channel (ES Models)
12.Press the following:
Preset
Meas
INPUT PORTS B
TESTPORT 2
Stop 10 G/n
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
Marker Search
SEARCH: MAX
Note the frequency and write it down.
13.Press
step 12.
Sweep Setup
CW FREQ
, and enter the maximum frequency point from
Press
G/n Marker Search
SEARCH: MAX
. Note the maximum marker reading (MMR) and write it down.
Press
Power
. Note the displayed test port power (TPP) and write it down.
14.The objective is to set the maximum marker reading (MMR) to 4 dB higher than the power meter reading. Perform the following mathematical operation.
a. Calculate the difference (
∆
) between the test port power meter reading (TPP) and the maximum marker reading (MMR) and then add 4.
∆
= (TPP + 4)
−
MMR
NOTE
The
∆ can be a positive or negative value.
15.If the magnitude of
∆
is less than 0.15 dB, then the offset for the B channel is correctly set. Go to “Sampler Calibration Correction Constants (Test 51)” on page 3-57 . If the magnitude is greater than 0.15 dB, continue to the next step.
16.Press the following:
System
SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001374 x1
PEEK
Note the PEEK value displayed under the
PEEK
label.
17.Calculate the new value by adding the PEEK value to
∆
multiplied by 4.
new value = current value +
(∆
X 4)
NOTE
Round the new value to the nearest integer.
3-52 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Raw Offset Correction Constants
18.Press
Poke
and enter the new value into the poke address; press x1
.
19.To get the analyzer to use the new poke value, press
20.Press the following:
Preset
.
Meas
INPUT PORTS B
Sweep Setup
CW FREQ
and enter the frequency from step 12.
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
x1
MARKER SEARCH SEARCH:MAX
The maximum marker reading is MMR.
21.Recalculate
∆
by taking the test port power (TPP), adding 4 and then subtracting the maximum marker reading (MMR).
∆
= (TPP + 4)
−
(MMR)
If the magnitude of
∆
is less than 0.15 dB, then the offset for the B channel is correctly set. Go to “Sampler Calibration Correction Constants (Test 51)” on page 3-57 . If the magnitude is greater than 0.15 dB, repeat steps 12 through 21 until the B channel raw offset correction constant is achieved.
Raw Offsets for the A and B Channels (ET Models)
1. Connect an open to the REFLECTION port.
2. Press the following:
Preset
Meas
INPUT PORTS A
Stop 10 G/n
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
Marker Search
SEARCH: MAX
Note the maximum frequency and write it down.
3. Press
Sweep Setup
CW FREQ
, and enter the maximum frequency point from step 2.
Press
G/n Marker Search
SEARCH: MAX
. Note the maximum marker reading (MMR) and write it down.
Press
Power
. Note the displayed test port power (TPP) and write it down.
Service Guide 3-53
Adjustments and Correction Constants
Raw Offset Correction Constants
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
4. The objective is to set the maximum marker reading (MMR) to 4 dB higher than the power meter reading. Perform the following mathematical operation.
a. Calculate the difference (
∆
) between the test port power meter reading (TPP) and the maximum marker reading (MMR) and then add 4.
∆
= (TPP + 4)
−
MMR
NOTE
The
∆ can be a positive or negative value.
5. If the magnitude of
∆
is less than 0.15 dB, then the offset for the A channel is correctly set. Go to “Raw Offset for the B Channel (ET Models)” on page 3-55 . If the magnitude is greater than 0.15 dB, continue to the next step.
6. Press the following:
System
SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001372 x1
PEEK
Note the PEEK value displayed under the
PEEK
label.
7. Calculate the new value by adding the PEEK value to
∆
multiplied by 4.
new value = current value +
(∆
X 4)
NOTE
Round the new value to the nearest integer.
8. Press
Poke
and enter the new value into the poke address; press x1
.
9. To get the analyzer to use the new poke value, press
10.Press the following:
Preset
.
Meas
INPUT PORTS A
Sweep Setup
CW FREQ
and enter the frequency from step 2.
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
x1
MARKER SEARCH SEARCH:MAX
The maximum marker reading is MMR.
11.Recalculate
∆
by taking the test port power (TPP), adding 4 and then subtracting the maximum marker reading (MMR).
∆
= (TPP + 4)
−
(MMR)
If the magnitude of
∆
is less than 0.15 dB, then the offset for the A channel is correctly set. Go to “Raw Offset for the B Channel (ET Models)” on page 3-55 . If the magnitude is greater than 0.15 dB, repeat steps 1 through 11 until the A channel raw offset correction constant is achieved.
3-54 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Raw Offset for the B Channel (ET Models)
12.Connect the equipment as shown in Figure 3-15 .
Adjustments and Correction Constants
Raw Offset Correction Constants
Figure 3-15 Setup for Calculating the Raw Offset for the B Channel (ET Models)
13.Press the following:
Preset
Meas
INPUT PORTS B
Stop 10 G/n
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
Marker Search
SEARCH: MAX
Note the frequency and write it down.
14.Press
step 13.
Sweep Setup
CW FREQ
, and enter the maximum frequency point from
Press
G/n Marker Search
SEARCH: MAX
. Note the maximum marker reading (MMR) and write it down.
Press
Power
. Note the displayed test port power (TPP).
15.The objective is to set the maximum marker reading (MMR) to 4 dB higher than the power meter reading. Perform the following mathematical operation.
a. Calculate the difference (
∆
) between the test port power meter reading (TPP) and the maximum marker reading (MMR) and then add 4.
∆
= (TPP + 4)
−
MMR
NOTE
The
∆ can be a positive or negative value.
16.If the magnitude of
∆
is less than 0.15 dB, then the offset for the B channel is correctly set. Go to “Sampler Calibration Correction Constants (Test 51)” on page 3-57 . If the magnitude is greater than 0.15 dB, continue to the next step.
Service Guide 3-55
Adjustments and Correction Constants
Raw Offset Correction Constants
17.Press the following:
System
SERVICE MENU
PEEK POKE PEEK/POKE ADDRESS
1619001374 x1
PEEK
Note the PEEK value displayed under the
PEEK
label.
18.Calculate the new value by adding the PEEK value to
∆
multiplied by 4.
new value = current value +
(∆
X 4)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
NOTE
Round the new value to the nearest integer.
19.Press
Poke
and enter the new value into the poke address; press x1
.
20.To get the analyzer to use the new poke value, press
21.Press the following:
Preset
.
Meas
INPUT PORTS B
Sweep Setup
CW FREQ
and enter the frequency from step13.
System
SERVICE MENU SERVICE MODES MORE SAMPLER COR OFF
x1
MARKER SEARCH SEARCH:MAX
The maximum marker reading is MMR.
22.Recalculate
∆
by taking the test port power (TPP), adding 4 and then subtracting the maximum marker reading (MMR).
∆
= (TPP + 4)
−
(MMR)
If the magnitude of
∆
is less than 0.15 dB, then the offset for the A channel is correctly set. Go to “Sampler Calibration Correction Constants (Test 51)” on page 3-57 . If the magnitude is greater than 0.15 dB, repeat steps 12 through 22 until the B channel raw offset correction constant is achieved.
In Case of Difficulty
• Ensure that the power meter and power sensor are operating to specification.
• If you are unable to perform this adjustment, refer to Chapter 8 , “Receiver
Troubleshooting,” or contact the nearest Hewlett-Packard sales or service office.
3-56 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Sampler Calibration Correction Constants (Test 51)
Sampler Calibration Correction Constants (Test 51)
Required Equipment and Tools
Equipment Description
Power Meter
Power Sensor
RF Cable Set
RF Open
1
Adapter 3.5-mm (f) to 3.5-mm (f)
Adapter 2.4-mm (f) to 2.4-mm (f)
HP 8719ET/ES
HP 8720ET/ES
HP 8722ET/ES
HP 436A, HP 437B, HP 438A
HP E4418A (HP EPM-441A) or
HP E4419A (HP EPM-442A)
HP 8485A HP 8487A
N/A HP part number
85052-60012
(Part of HP 85052B)
N/A HP part number
85056-60006
(Part of HP 85056A)
HP 85133F HP 85131F
HP part number
85052-60009
(Part of HP 85052B)
HP part number
85056-60023
(Part of HP 85056A)
1. The HP EPM-441A and HP EPM-442A, with versions prior to A 2.02.00 firmware, cannot be controlled by the analyzer. These versions do not have the HP 438A command set firmware. These models may be upgraded at an HP service center.
Analyzer and power meter warmup time: 30 minutes.
IMPORTANT
Perform “Raw Offset Correction Constants,” on page 3-47 before performing this test.
1. Make sure the A7 Switch is in the alter position (ALT).
2. Press
Preset
PRESET FACTORY
Preset
3. Connect the equipment as in Figure 3-16 .
.
Service Guide 3-57
Adjustments and Correction Constants
Sampler Calibration Correction Constants (Test 51)
Figure 3-16 Setup for Sampler Calibration
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Power Meter Setup
4. Zero and calibrate the power meter.
5. To set up the power meter address, press
Local
SET ADDRESSES
ADDRESS: P MTR HPIB
on the analyzer.
NOTE
The default power meter HP-IB address is 13. Make sure this address is the same as the power meter’s HP-IB address. Otherwise, use the analyzer’s front panel keypad to enter the correct HP-IB address or change the address in the power meter.
6. Press
POWER MTR:[POWER METER TYPE]
number appears in the brackets.
until the correct power meter model
NOTE
If you are using an HP E4418A or a HP E4419A, select
[438A/437]
power meter type from the analyzer menu. On the power meter softkey menu press:
437B
on the HP E4418A
438A
on the HP E4419A
7. Press
Cal
PWRMTR CAL
.
8. Press
LOSS/SENSR LISTS CAL FACTOR SENSOR A
. Refer to the back of the power sensor to locate the different calibration factor values along with their corresponding frequencies.
NOTE
The analyzer's calibration factor sensor table can hold a maximum of 12 calibration factor data points.
3-58 Service Guide
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Adjustments and Correction Constants
Sampler Calibration Correction Constants (Test 51)
The following softkeys are included in the sensor calibration factor entries menu:
SEGMENT
press to select a point where you can use the front panel knob or entry keys to enter a value.
EDIT
DELETE
ADD
CLEAR LIST
press to edit or change a previously entered value.
press to delete a point from the sensor calibration factor table.
press this key to add a point into the sensor calibration factor table.
press this key to erase the entire sensor calibration factor table.
DONE
press this key when done entering points to the sensor calibration factor table.
9. As an example, the following are the keystrokes for entering the first two calibration factor data points for the HP 8485A power sensor (assuming CF% = 99.5 at 50 MHz and
CF% = 98.4 at 20 GHz): a. From the sensor calibration factor entries menu, press
ADD
.
b. Press
FREQUENCY
50 M/
µ re-enter the correct value again.
. If you make an entry error, press
← c. Press
CAL FACTOR
99.5
x1
.
d. Press
DONE
to terminate the first calibration factor data point entry.
e. To enter the second calibration factor data point, press
ADD
.
and f. Press
FREQUENCY
20 G/n
.
g. Press
CAL FACTOR
98.4
x1
.
h. To terminate the second calibration factor data point entry, press
DONE
.
i. Press
SEGMENT
and use the front panel knob to scroll through the sensor calibration factors table. Check to be sure all values are entered correctly. If you see an error, use the front panel knob to point to the data point you want to modify and press
EDIT
.
10.Enter the power sensor calibration factors and press
DONE
.
11.Press the following:
System
SERVICE MENU
SERVICE MODES MORE
SAMPLER COR OFF
Service Guide 3-59
Adjustments and Correction Constants
Sampler Calibration Correction Constants (Test 51)
HP 8719ET/20ET/22ET
HP 8719ES/20ES/22ES
RF Network Analyzers
Performing the Sampler Calibration
12.Press the following:
System
SERVICE MENU TESTS
51 x1
EXECUTE TEST YES
13.Follow the instructions on the analyzer display.
14.Observe the analyzer display for the results of the test.
• If the analyzer displays
SAMPLER COR -DONE-
, the test has passed, go to step 5.
• If the analyzer displays
SAMPLER COR -FAIL-
, repeat the test.
15.Move the A7 switch back to its normal position (NRM) if you are finished working on the instrument.
16.Perform the “EEPROM Backup Disk Procedure,” on page 3-32 .
In Case of Difficulty
• Ensure that the power meter and power sensor are operating to specification.
• If you are unable to perform this adjustment, refer to the Chapter 8 , “Receiver
Troubleshooting,” chapter, or contact the nearest Hewlett-Packard sales or service office.
3-60 Service Guide
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