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Agilent Technologies N3970A manual RS232 INTERFACE

Models: N3970A

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■RS232 INTERFACE

The connection details of the instrument, and connecting cables are as follows :

Some (out of spec) serial ports need a 10 K resistor in the D connector across wires 1 & 2.

	Wire 1 (screen)	Wire 2	Wire 3
Instrument Jack Plug	Body (Gnd)	Ring (Tx)	Tip (Rx)
9 Pin D connector for RS232	Pin 5 (Gnd)	Pin 2 (Rx)	Pin 3 (Tx)

The RS232 interface can be used to access and control the instrument from an external computer. All functions can be accessed remotely. See next pages for available software.

The baud rate can be set to: 0.3, 0.6, 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 56 Kbaud. The default and printer baud rate is 9.6 Kbaud. To set the baud rate, on the hidden keypad, select -SHIFT- BAUD RATE, then -/+ to SET the rate, followed by set. At turn on, the default is restored.

Local / remote modes

The hidden keypad enables the user to lock out the front panel controls, by selecting LOCAL or REMOTE.

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Agilent Technologies N3970A manual RS232 INTERFACE

Contents

N3970A OPTICAL POWER METER Operating and Maintenance GuidePage Select POWER, Source, then N3970A OPTICAL POWER METER SOURCE QUICK REFERENCE GUIDEAUTOTEST OPERATION Autotest Push Autotest on source and wait a few secondsOPTICAL POWER METER INTRODUCTION AND APPLICATIONSN3970A CONTENTS SERVICE AND SUPPORT INTRODUCTION AND APPLICATIONS Typical applications INTRODUCTION AND APPLICATIONSSAFETY SUMMARY Initial Inspection Line Power RequirementsOperating Environment Storage and ShipmentBATTERY AND EXTERNAL POWER Use of the external power supply disconnects the batteriesAC adaptor N3979A 9V DC, 1.33 A OPTICAL CONNECTOR Cleaning OPTICAL CONNECTORBare fiber adaptors GETTING STARTED AND TURNING ON This and following sections show you how to use your instrumentPOWER turn on instrument, SHIFT, CANCEL, SET, SELECT, RECALL, STORE GETTING STARTED AND TURNING ON To disable or enable the buzzer, hold down SHIFT for 3 secondsAUTOTEST OPERATION General Autotest featuresOperation AUTOTEST OPERATION Either a ‘local’ or ‘remote’ reference can be storedRefer also to manual sections on Storing and recalling readings POWER METER OPERATION Storing & recalling readings using non-volatile memory STORING & RECALLING READINGSMemory No Total memoryMemory operating sequence STORING & RECALLING READINGSRS232 INTERFACE CARE OF YOUR INSTRUMENT All measurements ACCURACY CONSIDERATIONSN3970A UM-1 ACCURACY CONSIDERATIONSCalibration CALIBRATION & MAINTENANCECALIBRATION & MAINTENANCE MaintenanceOpening the instrument CALIBRATION, MAINTENANCE & INSTRUMENT RETURNS SPECIFICATIONS - DEFINITION OF TERMS SPECIFICATIONS & ORDERING INFORMATION 1 All specifications at 850 nm are typical SPECIFICATIONS & ORDERING INFORMATIONN3970A Optical Power Meter SPECIFICATIONS & ORDERING INFORMATIONPower Supply 9V DC N3970-63240Equipment Required PERFORMANCE TESTCharacteristics Instrument/AccessoryTable 1 Required Equipment RecommendedTest Record Instrument SpecificationTest Failure PERFORMANCE TESTTotal Uncertainty / Accuracy Test Performance Testtemperature PERFORMANCE TESTPERFORMANCE TEST 4. Switch on the instruments a. Switch on the lightwave multimeter6. Measure the DUT PERFORMANCE TESTPERFORMANCE TEST PERFORMANCE TEST Optical Head Interface ModuleN3970-63251 PERFORMANCE TEST Total Uncertainty/Accuracy Test+0.3 dB of Ref PERFORMANCE TEST Safety Precautions CLEANING INFORMATIONWhy is it important to clean optical devices ? CLEANING INFORMATIONCLEANING PROCEDURES Preferred ProcedureProcedure for Stubborn Dirt DISCLAIMER & WARRANTY N3970A UM-1