Service Guide
Agilent Technologies E4418B/E4419B Power Meters
Copyright 1998, 2003Agilent Technologies
Agilent E4418B/E4419B Service Guide
Printed in the UK
Legal Information
Warranty
Certification
Exclusive Remedies
Limitation of Warranty
Equipment Operation
Personal Safety Considerations
Warnings and Cautions
Markings
General Safety Considerations
IEC 1010-1 Compliance
Installation Instructions
Statement of Compliance
User Environment
Agilent E4418B/E4419B Service Guide is available by ordering Option
List of Related Publications
Sales and Service Offices
Latin America
Europe
United States
Package the Power Meter for Shipment
Returning Your Power Meter for Service
Chapter 1 Specifications
About this Guide
Chapter 3 Adjustments
Chapter 6 Troubleshooting
Page
Table of Contents
Procedure
Test Setup
Specification
Test Procedure
Measurement Uncertainty Analysis Instrument Accuracy Test1
Measurement Uncertainty Analysis Power Reference Level Test1
Specifications
Introduction
Introduction
Meter
Power Meter Specifications
Power Range
Power Sensors
Table 1-1 Zero Set Specifications
Accuracy
Power Sensor
Instrumentation
50 MHz nominal
1 mW Power Reference1
Measurement Speed
Power Meter Supplemental Characteristics
Zero Drift of Sensors
Normal Mode
Measurement Noise
x2 mode
Noise Multiplier
Measurement Noise
Zero Drift
For Agilent 8480 series power sensors
Settling Time
Normal Mode
x2 mode
Normal Mode
For Agilent E-series power sensors
x2 mode
Settling Time s
x2 Mode
Normal Mode
Maximum dBm
Maximum dBm
Definitions Zero Set
Power Sensor Specifications
Zero Drift
Measurement Noise
Service Life
Battery Option 001 Operational Characteristics
Weight
Typical Operating Time
Rear Panel Connectors
General Characteristics
Line Power
Recorder Outputs
General Conditions
Environmental Characteristics
Operating Environment
Storage Conditions
Weight
Dimensions
Safety
General
Non-Volatile Memory
Remote Programming
Command Language
Battery
Specifications
Agilent E4418B/E4419B Service Guide
1-18
General
Performance Tests
User’s Guide
Introduction
Performance Tests
Critical Specification
Equipment Required
Table 2-1 Required Equipment
Equipment
Performance Test Record
Test Procedures
Performance Tests
Calibration Cycle
Test Setup
Specification
Zero Test
Description
Input Settings
Procedure
Instrument Accuracy Test
Test Procedure
Specification
Description
Procedure
Test Setup
Figure 2-2 Instrument Accuracy Test Setup
Confirm
When switching the range calibrator to STANDBY, allow enough
10 ∝W
3 ∝W
30 ∝W
Test Setup
Test Procedure
Figure 2-3 Instrument Accuracy Average Path Test Setup
Equipment
the power meter is connected
Procedure
There is a small risk of mild electrical shock from the
chassis of the 11683A option H01 range calibrator unless
Input Settings , More
Table 2-4 Instrument Accuracy Results
Characteristics
Power Reference Level Test
Description
Electrical
Equation 2-4 Power Level Provided By The Reference Oscillator
Procedure
Test Setup
Figure 2-4 Power Reference Level Test Setup
Power
Table 2-5 Power Reference Level Test Result
Press , Power Ref On
Actual Result
0.999 mW
Procedure
Agilent E-Series Power Sensor Interface Test
Agilent E-Series Power Sensor Interface Test
Procedure
Agilent E-Series Power Sensor Functional Test
Figure 2-5 Sensor Functional Test Setup
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
Adjustments described in this chapter are performed with
Safety Considerations
power applied to the instrument and with protective
covers removed. Maintenance should be performed only by
Table 3-1 Post Repair Adjustments, Tests, and Checks
Post-Repair Adjustments
Assembly Replaced
Related Adjustments, Performance
Procedure
Power Reference Oscillator Frequency Adjustment
Figure 3-1 Adjustment Setup
Description
Figure 3-2 A2L9 Adjustment Location
Power Reference Oscillator Level Adjustment
Power Reference Oscillator Level Adjustment
Description
INPUT
+ INPUT
Thermistor Mount
Vcomp
Equipment
Procedure
Zero Cal
Power Ref On
Figure 3-4 A2R90 Adjustment Location
Measurement Uncertainty
Introduction
Display Brightness and Contrast Adjustment
Procedure
Service
Adjustments
Agilent E4418B/E4419B Service Guide
Display Brightness and Contrast Adjustment
3-12
Theory of Operation
Theory of Operation
Introduction
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
pressing System , More , Service , Self Test, Individual
A3 Front Panel Assembly
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
A8 Rechargeable Battery Assembly
Agilent E4418B/E4419B Service Guide
Remove this page and replace with pullout.fm
4-13
A8 Rechargeable Battery Assembly
Agilent E4418B/E4419B Service Guide
4-14
Theory of Operation
Replaceable Parts
Replaceable Parts
Introduction
Reference
Assembly Part Numbers
Description
Agilent Part
Description
Reference
Agilent Part
Designator
Power Supply Assembly Types
Front Panel Connector Repair
Front Panel Connector Repair
Downloading Firmware
Firmware Upgrades
Removing the Power Meter Cover
Assembly and Disassembly Guidelines
Removing the A1 Power Supply Assembly
n n n
Removing the A2 Processor Assembly
screws
Removing the A4 Comms Assembly
Removing the A5 Daughter or A6 Measurement Assemblies
1. Remove the A1 power supply assembly as shown on page
Removing the A7 Fan Assembly
2. Remove the pins which attach the fan to the chassis
Agilent E4418B/E4419B Service Guide
This power meter uses a lithium battery which may explode if
Removing the Power Meter RAM Battery BT1
battery terminals or to excessive heat
Removing the A3 Front Panel Assembly
Front panel sensor retaining clip recess
Replacing the Front Panel Power Sensor Cable Assemblies
Assembly and Disassembly Guidelines
Agilent E4418B/E4419B Service Guide
5-17
Replaceable Parts
Replacing the Front Panel Power Reference Cable Assembly
Rear panel sensor retaining clip recess
Assembly and Disassembly Guidelines
Agilent E4418B/E4419B Service Guide
5-20
Replaceable Parts
Replacing the Rear Panel Power Reference Cable Assembly Option
Replacing the Rear Panel Recorder Outputs Cable Assembly
Replacing The Chassis Assembly
Assembly and Disassembly Guidelines
Agilent E4418B/E4419B Service Guide
5-24
Replaceable Parts
Troubleshooting
Troubleshooting
Suggested Diagnostic Equipment
Introduction
Start Power Up meter POST Pass?
Troubleshooting
Connect Sensor to Channel A Any Sensor Errors?
Self Test Errors?
Preset/local Confirm Meas/Setup Limits Limits On TTL Output
Troubleshooting
Introduction
TTL Output On, Fail O/P Low
Start Power Up meter POST Pass?
Troubleshooting
Connect Sensor to Channel A Any Sensor Errors?
Self Test Errors?
Troubleshooting
Agilent E4418B/E4419B Service Guide
Introduction
Start Power Up meter POST
Troubleshooting
Any Sensor Errors?Yes
Errors?
Troubleshooting
Agilent E4418B/E4419B Service Guide
Introduction
Dual
Troubleshooting
Agilent E4418B/E4419B Service Guide
Introduction
Introduction
Troubleshooting
All/Other
Start
Measurement Uncertainty Analysis Instrument Accuracy Test
Appendix A
Power Meter
Measurement Introduction
Define the Measurand
Uncertainties
Define the Measurement Equation
u2MA = CTSE ⋅ uTSE 2 + CMV ⋅ u MV
Uncertainty Equation
Standard Uncertainty uxi
Power Level
Standard Deviation of
Conversion to Linear Units
Voltage Error
Worst case error on 0.1V range
Worst case error on 1V range
Voltage Error
Voltage Error
Worst case error on 15.8V maximum power setting
Power mW
Distribution
Sensitivity Coefficients Ci
Expanded Uncertainty kucy
Combined Standard Uncertainty ucy
A-10
Agilent E4416A/E4417A Service Guide
Measurement Uncertainty Analysis - Instrument Accuracy Test
Measurement Introduction
Appendix B
Measurement Uncertainty Analysis - Power Reference Level Test
Measurement Uncertainty Analysis - Power Reference Level Test
Define the Measurand
Measurement Introduction
Define the Measurement Equation
Pmeas =
Pmeas = fVcomp,V1,V0,R,CF,Ms
Figure B-1 Measurement Setup
Voltage Measurements Uncertainty
Uncertainty Equation
MsUncertainty = 1 ⁄ 1±2PsPd
1 j = ∑i +
= ±49.25uV
Mismatch
Voltage measurement
Uncertainty
VSWR +
VSWR
1.05 +
Sensor Calibration Factor Drift
Calibration factor
u Ms = ---------------------------------------------------- =
Repeatability
Resistance
10ppm of reading + 0.5ppm of range
200 ⋅ 10 + 5 + 3 1000 ⋅ 0.5 +
Table B-1 Measurement Repeatability Results
ADJUST REF
Measurement
REF. LEVEL TEST
Sensitivity Coefficients Ci
I mW Power Measured = fVcomp, V1, V0, R, CF, Ms
1.224 ⋅
Using the above values gives
Combined Standard Uncertainty ucy
Expanded Uncertainty
Index
Page
Page
Index-4
Agilent E4418B/E4419B Service Guide