Agilent Technologies E4418B/E4419B Power Meters
Service Guide
Agilent E4418B/E4419B Service Guide
Copyright 1998, 2003Agilent Technologies
Printed in the UK
Warranty
Legal Information
Certification
Limitation of Warranty
Exclusive Remedies
Personal Safety Considerations
Equipment Operation
Warnings and Cautions
General Safety Considerations
Markings
Statement of Compliance
Installation Instructions
IEC 1010-1 Compliance
User Environment
List of Related Publications
Agilent E4418B/E4419B Service Guide is available by ordering Option
Sales and Service Offices
Europe
Latin America
United States
Returning Your Power Meter for Service
Package the Power Meter for Shipment
Chapter 3 Adjustments
About this Guide
Chapter 1 Specifications
Chapter 6 Troubleshooting
Table of Contents
Page
Specification
Test Setup
Procedure
Test Procedure
Measurement Uncertainty Analysis Instrument Accuracy Test1
Measurement Uncertainty Analysis Power Reference Level Test1
Specifications
Introduction
Introduction
Power Range
Power Meter Specifications
Meter
Power Sensors
Power Sensor
Accuracy
Table 1-1 Zero Set Specifications
Instrumentation
1 mW Power Reference1
50 MHz nominal
Power Meter Supplemental Characteristics
Measurement Speed
Zero Drift of Sensors
x2 mode
Measurement Noise
Normal Mode
Noise Multiplier
Zero Drift
Measurement Noise
Normal Mode
Settling Time
For Agilent 8480 series power sensors
x2 mode
x2 mode
For Agilent E-series power sensors
Normal Mode
Settling Time s
Maximum dBm
Normal Mode
x2 Mode
Maximum dBm
Zero Drift
Power Sensor Specifications
Definitions Zero Set
Measurement Noise
Weight
Battery Option 001 Operational Characteristics
Service Life
Typical Operating Time
Line Power
General Characteristics
Rear Panel Connectors
Recorder Outputs
Operating Environment
Environmental Characteristics
General Conditions
Storage Conditions
Safety
Dimensions
Weight
General
Command Language
Remote Programming
Non-Volatile Memory
Battery
1-18
Agilent E4418B/E4419B Service Guide
Specifications
General
Performance Tests
Introduction
User’s Guide
Performance Tests
Table 2-1 Required Equipment
Equipment Required
Critical Specification
Equipment
Performance Tests
Test Procedures
Performance Test Record
Calibration Cycle
Zero Test
Specification
Test Setup
Description
Procedure
Input Settings
Specification
Test Procedure
Instrument Accuracy Test
Description
Figure 2-2 Instrument Accuracy Test Setup
Test Setup
Procedure
Confirm
When switching the range calibrator to STANDBY, allow enough
3 ∝W
10 ∝W
30 ∝W
Figure 2-3 Instrument Accuracy Average Path Test Setup
Test Procedure
Test Setup
Equipment
There is a small risk of mild electrical shock from the
Procedure
the power meter is connected
chassis of the 11683A option H01 range calibrator unless
Input Settings , More
Table 2-4 Instrument Accuracy Results
Description
Power Reference Level Test
Characteristics
Electrical
Equation 2-4 Power Level Provided By The Reference Oscillator
Figure 2-4 Power Reference Level Test Setup
Test Setup
Procedure
Power
Actual Result
Press , Power Ref On
Table 2-5 Power Reference Level Test Result
0.999 mW
Agilent E-Series Power Sensor Interface Test
Procedure
Agilent E-Series Power Sensor Interface Test
Figure 2-5 Sensor Functional Test Setup
Agilent E-Series Power Sensor Functional Test
Procedure
Description
Figure 2-6 Sensor Functional Test Setup with Attenuator
Table 2-6 Functional Test Result
Performance Test Record
Performance Test Record
1. This test is not channel related
Adjustments
power applied to the instrument and with protective
Safety Considerations
Adjustments described in this chapter are performed with
covers removed. Maintenance should be performed only by
Assembly Replaced
Post-Repair Adjustments
Table 3-1 Post Repair Adjustments, Tests, and Checks
Related Adjustments, Performance
Figure 3-1 Adjustment Setup
Power Reference Oscillator Frequency Adjustment
Procedure
Description
Figure 3-2 A2L9 Adjustment Location
Power Reference Oscillator Level Adjustment
Power Reference Oscillator Level Adjustment
Description
Thermistor Mount
+ INPUT
INPUT
Vcomp
Procedure
Equipment
Power Ref On
Zero Cal
Measurement Uncertainty
Figure 3-4 A2R90 Adjustment Location
Procedure
Display Brightness and Contrast Adjustment
Introduction
Service
Display Brightness and Contrast Adjustment
Agilent E4418B/E4419B Service Guide
Adjustments
3-12
Theory of Operation
Introduction
Theory of Operation
Introduction
A1 Power Supply/Battery Charger
A1 Power Supply/Battery Charger
A2 Processor Assembly
A2 Processor Assembly
Agilent E4418B/E4419B Service Guide
The microcontroller circuits that control all the above functions, and
A3 Front Panel Assembly
pressing System , More , Service , Self Test, Individual
Display
A4 Comms Assembly
A4 Comms Assembly
A5 Daughter Assembly
A5 Daughter Assembly
A6 Measurement Assembly
A6 Measurement Assembly
Agilent 8480 series power sensors this is 0 V and -10 V at 217 Hz
A8 Rechargeable Battery Assembly
A8 Rechargeable Battery Assembly
Remove this page and replace with pullout.fm
Agilent E4418B/E4419B Service Guide
A8 Rechargeable Battery Assembly
4-13
4-14
Agilent E4418B/E4419B Service Guide
A8 Rechargeable Battery Assembly
Theory of Operation
Replaceable Parts
Introduction
Replaceable Parts
Description
Assembly Part Numbers
Reference
Agilent Part
Agilent Part
Reference
Description
Designator
Power Supply Assembly Types
Front Panel Connector Repair
Front Panel Connector Repair
Firmware Upgrades
Downloading Firmware
Assembly and Disassembly Guidelines
Removing the Power Meter Cover
Removing the A1 Power Supply Assembly
Removing the A2 Processor Assembly
n n n
Removing the A4 Comms Assembly
screws
Removing the A5 Daughter or A6 Measurement Assemblies
2. Remove the pins which attach the fan to the chassis
Removing the A7 Fan Assembly
1. Remove the A1 power supply assembly as shown on page
Agilent E4418B/E4419B Service Guide
Removing the Power Meter RAM Battery BT1
This power meter uses a lithium battery which may explode if
battery terminals or to excessive heat
Removing the A3 Front Panel Assembly
Replacing the Front Panel Power Sensor Cable Assemblies
Front panel sensor retaining clip recess
5-17
Agilent E4418B/E4419B Service Guide
Assembly and Disassembly Guidelines
Replaceable Parts
Replacing the Front Panel Power Reference Cable Assembly
Rear panel sensor retaining clip recess
5-20
Agilent E4418B/E4419B Service Guide
Assembly and Disassembly Guidelines
Replaceable Parts
Replacing the Rear Panel Power Reference Cable Assembly Option
Replacing the Rear Panel Recorder Outputs Cable Assembly
Replacing The Chassis Assembly
5-24
Agilent E4418B/E4419B Service Guide
Assembly and Disassembly Guidelines
Replaceable Parts
Troubleshooting
Suggested Diagnostic Equipment
Troubleshooting
Introduction
Connect Sensor to Channel A Any Sensor Errors?
Troubleshooting
Start Power Up meter POST Pass?
Self Test Errors?
Introduction
Troubleshooting
Preset/local Confirm Meas/Setup Limits Limits On TTL Output
TTL Output On, Fail O/P Low
Connect Sensor to Channel A Any Sensor Errors?
Troubleshooting
Start Power Up meter POST Pass?
Self Test Errors?
Agilent E4418B/E4419B Service Guide
Troubleshooting
Introduction
Any Sensor Errors?Yes
Troubleshooting
Start Power Up meter POST
Errors?
Introduction
Agilent E4418B/E4419B Service Guide
Troubleshooting
Dual
Agilent E4418B/E4419B Service Guide
Troubleshooting
Introduction
All/Other
Troubleshooting
Introduction
Start
Appendix A
Measurement Uncertainty Analysis Instrument Accuracy Test
Measurement Introduction
Power Meter
Uncertainties
Define the Measurand
Define the Measurement Equation
Uncertainty Equation
u2MA = CTSE ⋅ uTSE 2 + CMV ⋅ u MV
Standard Deviation of
Power Level
Standard Uncertainty uxi
Conversion to Linear Units
Worst case error on 1V range
Worst case error on 0.1V range
Voltage Error
Voltage Error
Power mW
Worst case error on 15.8V maximum power setting
Voltage Error
Distribution
Sensitivity Coefficients Ci
Combined Standard Uncertainty ucy
Expanded Uncertainty kucy
Measurement Uncertainty Analysis - Instrument Accuracy Test
Agilent E4416A/E4417A Service Guide
A-10
Measurement Introduction
Measurement Uncertainty Analysis - Power Reference Level Test
Appendix B
Measurement Uncertainty Analysis - Power Reference Level Test
Define the Measurement Equation
Measurement Introduction
Define the Measurand
Pmeas =
Figure B-1 Measurement Setup
Pmeas = fVcomp,V1,V0,R,CF,Ms
MsUncertainty = 1 ⁄ 1±2PsPd
Uncertainty Equation
Voltage Measurements Uncertainty
1 j = ∑i +
Voltage measurement
Mismatch
= ±49.25uV
Uncertainty
VSWR
VSWR +
1.05 +
Calibration factor
Sensor Calibration Factor Drift
u Ms = ---------------------------------------------------- =
10ppm of reading + 0.5ppm of range
Resistance
Repeatability
200 ⋅ 10 + 5 + 3 1000 ⋅ 0.5 +
Measurement
ADJUST REF
Table B-1 Measurement Repeatability Results
REF. LEVEL TEST
I mW Power Measured = fVcomp, V1, V0, R, CF, Ms
Sensitivity Coefficients Ci
Using the above values gives
1.224 ⋅
Expanded Uncertainty
Combined Standard Uncertainty ucy
Index
Page
Page
Agilent E4418B/E4419B Service Guide
Index-4