Zeroing and Calibrating the Power Meter | HP Saw E4419B specification

Power Meter Operation

Zeroing and Calibrating the Power Meter

Zeroing and Calibrating the Power Meter

This section describes how to zero and calibrate the power meter. You should always zero the power meter prior to calibrating it.

Zeroing the Power Meter

Zeroing adjusts the power meter for a zero power reading with no power applied to the power sensor. During zeroing, which takes approximately 10 seconds, the wait symbol is displayed.

To zero the power meter:

1.Press ZerCalo .

2.To zero channel A or channel B use Zero A or Zero B respectively. Alternatively, to zero both channel A and channel B sequentially, use Zero Both . During zeroing the wait symbol is displayed.

When to Zero?

Zeroing of the power meter is recommended:

•when a 50C change in temperature occurs.

•when you change the power sensor.

•every 24 hours.

•prior to measuring low level signals. For example, 10 dB above the lowest speciﬁed power for your power sensor.

Zero/Cal Lockout

The Zero/Cal Lockout facilty provides a means of ensuring that a measurement cannot be taken until the connected sensor has been zeroed and calibrated. If the Zero/Cal Lockout facilty is enabled and a sensor is connected which has not been zeroed and calibrated, then the display window for the sensor will display the message “Please Zero + Cal ChA” or “Please Zero + Cal ChB” depending on which channel the sensor is connected to.

If you zero the sensor before calibrating it, the message changes to “Please Cal ChA” or “Please Cal ChB” depending on which channel the sensor is connected to.

HP E4419B User’s Guide

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HP Saw E4419B manual Zeroing and Calibrating the Power Meter, Zeroing the Power Meter, Zero/Cal Lockout, When to Zero?

Contents

HP Part no. E4419-90006 December User’s GuidePage Certiﬁcation WarrantyLegal Information Exclusive Remedies Limitation of Warranty Equipment Operation Personal Safety Considerations Markings General Safety Considerations User Environment Installation InstructionsIEC 1010-1 Compliance Statement of Compliance Herstellerbescheinigung Regulatory InformationSound Emission Australian EMC Regulations Declaration of Conformity HP E4418B/E4419B Programming Guide is shipped as standard List of Related Publications HP E4419B Options Available Accessories About this Guide Table of Contents Page HP-IB Page List of Figures Contents-6 HP E4419B User’s Guide List of Tables Contents-8 HP E4419B User’s Guide Getting Started Introduction Set the display contrast if required Turning On the Power MeterConnect the power cord and turn on the power meter Connect the power sensors Hardkeys relating to the display layout Front Panel at a Glance Channel Inputs System/Inputs hardkey with softkey menuDedicated Window hardkeys with softkey menus Dedicated Channel hardkeys with softkey menus Softkeys Power REF OutputArrow hardkeys Menu related hardkeys Display Layout Cal CFxxx.x% Xxx.xyHza Nn,a Reference Upper Lower Number Display Line HP E4419B User’s Guide Selecting Your Display Layout Display Tutorial HP E4419B User’s Guide Conﬁrmation Window Window SymbolsWait Symbol Numeric or Alphanumeric Entry Window N Entry Window Rear Panel at a Glance Rmt I/O Ground ConnectorSerial Label Adjusting the Carrying Handle Rack Mounting the Power Meter Rack Mounting the Power Meter Power Meter Operation Power Meter Operation Running Time Battery Operation OptionBattery Status General Information Backlight Charging Times Battery Removal/Replacement Battery Removal/Replacement Zero/Cal Lockout Zeroing and Calibrating the Power MeterZeroing the Power Meter When to Zero? Calibration Procedure Using HP E-Series Power Sensors Calibrating the Power Meter V8486A and W8486A sensors Calibration Procedure using HP 8480 Series Power SensorsExample Models Zeroing and Calibrating the Power Meter Sensor Connection Requirements Model TTL Inputs Control Logic Operation Zeroing and Calibrating Using TTL Inputs Timing of zero/cal inputs for conditions 01 TTL Input Timing Diagram Timing of zero/cal inputs for condition TTL Inputs Timing Diagram Procedure Making Measurements with the HP E-Series Power Sensors Freq . Use Making Measurements with the HP 8480 Series Power Sensors Zero a Cal Cal Fac . Use Selecting a Sensor Calibration Table Making Measurements using Sensor Calibration Tables Sensor Tbls Screen Making the Measurement Editing Sensor Calibration Tables Edit Cal Screen Making Measurements using Sensor Calibration Tables You can only edit the table name you cannot delete it Default R8486A HP 8487A Selecting a Frequency Dependent Offset Table Making Measurements using Frequency Dependent Offset Tables Offset Tbls Screen Editing Frequency Dependent Offset Tables Edit Screen You delete the frequency the equivalent offset is also Setting the Units of Measurement Selecting Units of Measurement from the Softkeys Making Relative Measurements Setting the Resolution Setting Display Offsets Setting OffsetsSetting Channel Offsets Effect of Offsets on a Channel Measurement Setting Averaging 10 Averaged Readings Step Detection 11 Pulsed Signal Measuring Pulsed Signals To set the duty cycle Press Setting Channel Limits Setting Measurement Limits 12 Limits Checking Application Setting Window Limits Range of Values for Window Limits Max Min Default Units 14 Remote I/O TTL Outputs Checking for Limit Failures 15 Pass/Fail Limit Indicators Channel Measurements Making Difference Measurements Making Ratio Measurements 16 Digital Display Selecting a Digital or Analog Display Display Format Selecting a Digital or Analog Display Setting the Range HP-IB Address Conﬁguring the Remote Interface RS232/RS422 RS232/422 Connector Setting the RS232/422 Parameters Remote Interface Overview 20 Interface Overview Examples Programming Language Selection Recorder Outputs 21 Test Setup for Recording Swept Measurements Leveling a Source Output Saving and Recalling Power Meter Conﬁgurations 22 Save/Recall Screen Window Functions How Measurements are Calculated Preset Conditions Presetting the Power Meter Offset is set to 0.000 dB Is set to Off HP E4419B User’s Guide Self Test Power On Self Test Front Panel Selection of Self Tests Conﬁdence Check Instrument Self Test Remote Testing Test Descriptions Display Option 001 BatteryCalibrator Keyboard Front Panel only Bitmap Display Front Panel only Replacing the Power Line Fuse Operator Maintenance Before calling Hewlett-Packard Contacting Hewlett-Packard Instrument serial numbers Check the Basics OPT Japan Sales and Service OfﬁcesAsia Paciﬁc Canada Latin America South Africa 011 806Switzerland 01 735 United Kingdom 01344 366 Package the Power Meter For Shipment Returning Your Power Meter for Service HP E4419B User’s Guide Menu Reference Menu Reference DBm/W Menu Front Panel Menu Maps Frequency/Cal Fac Menu Meas Setup Menu Save/Recall Menu Rel/Offset Menu Auto System Inputs Menu 1 000W System Inputs Menu 2 Scpi System Inputs Menu 3 System Inputs Menu 4 Zero/Cal Menu Front Panel Menu Reference Freq Cal Fac Cal Fac Front Panel Menu Reference Meas/Setup Menu Meter Dgtl Anlg TTL Output Front Panel Menu Reference More, Preset/Local, Prev Keys Rel Save HP-IB RS422 RTS/CTS Echo Freq Dep Offset Linearity ATyp DTyp and B Linearity ATyp DTyp Duty Cycle Commonly used for troubleshooting. The default is Off Press this softkey to return to the System/Inputs menu Press this softkey to run a test on the internal cooling fan Serial Interface Set Contrast Backlight On Zero B Off Diagrammatical Hardkeys Is implemented in the selected window HP E4419B User’s Guide Error Messages Error Annunciator Position Error List then Clear Errors Error Messages Too many digits Undeﬁned headerInvalid character in number Exponent too large Invalid block data Character data not allowedInvalid string data String data not allowed Trigger deadlock Parameter errorFrequency list must be in ascending orderSettings conﬂict Settings conﬂictDTR/DSR not available on RS422 Data corrupt or stalePlease zero Channel a Data questionableCAL Error ChAData corrupt or stalePlease zero and calibrate Channel a Data corrupt or stalePlease zero and calibrate Channel B Data questionableZERO Error ChA Data questionableCAL Error ChBData questionableLower window log error Data questionableUpper window log error System errorDetector Eeprom Read Failed unknown System errorCh B Dty Cyc may impair accuracy with ECPSystem errorDetector Eeprom Read Failed critical data not System errorDetector Eeprom Read Completed OK but Self-test FailedRAM Battery Fault Self-test FailedMeasurement Channel a FaultSelf-test FailedMeasurement Channel B Fault Self-test FailedOption 001 Battery requires replacement Queue overﬂow Self-test FailedSerial Interface FaultParity error in program Framing error in program Speciﬁcations Speciﬁcations Meter Power Meter Speciﬁcations Instrumentation Zero Set Speciﬁcations Power SensorAccuracy Accuracy Power ReferencePower Output Frequency Power Meter Supplemental CharacteristicsConnector Measurement Speed Averages Zero Drift of SensorsMeasurement Noise Noise Multiplier Number Zero Drift Measurement Noise Power Sensor Speciﬁcations Settling Time Number For HP 8480 series power sensorsNormal Mode X2 Mode Settling Time For HP E-series power sensors Normal Mode X2 Mode Maximum dBm Measurement Noise Power Sensor SpeciﬁcationsDeﬁnitions Zero Set Zero Drift Battery Option 001 Operational Characteristics Rear Panel Connectors General Characteristics Storage Conditions Environmental CharacteristicsGeneral Conditions Operating Environment General DimensionsWeight Safety HP-IB Compatibility BatteryNon-Volatile Memory HP E4419B User’s Guide Index Index-2 HP E4419B User’s Guide HP E4419B User’s Guide Index-3 Index-4 HP E4419B User’s Guide HP E4419B User’s Guide Index-5 Index-6 HP E4419B User’s Guide HP E4419B User’s Guide Index-7 Index-8 HP E4419B User’s Guide