Agilent Technologies N3970A Betriebsanleitung

Operating and

Maintenance Guide

N3970A OPTICAL POWER METER

■N3970A OPTICAL POWER METER SOURCE QUICK REFERENCE GUIDE

■To remove interchangeable connector, move interface to

mid position, and pull off adaptor.

■To defeat auto power-off, hold POWER for 3 seconds at

turn on until ON and perm are displayed.

■To access hidden keypad, pull up display cover.

Select POWER,Source, then:

■To set reference, push Abs/Rel and hold Set Ref for

3 seconds (3 buzzer sounds).

■To display reference, hold Abs/Rel, so Ref flashes.

■To stop / start display update, push Hold.

■If a test tone is detected, meter will display Hz.

AUTOTEST OPERATION

■No user action is required for meter to enter Autotest

mode.

■Autotest:

Push Autotest on source and wait a few

seconds.

■Can also push Autotest on meter for faster lock-on.

■To display one wavelength only, on the power meter

push the left side of -/+ and again for the other wavelength.

Push right side of -/+ (twice) to exit.

■Autotest remains for >8 seconds after signal loss, to allow

quick connection change.

■Toexit autotest,removetestleadorturnoff source for>8seconds.

MANUAL OPERATION

■To turn on and select wavelength, push: POWER, Power

Meter, -/+.

■To display linear mode, push dBm/W.

■To display max/min values, push MAX/MIN repeatedly.

Hold MAX/MIN to reset (3 buzzer sounds). .

MEMORY

■Enter Power Meter or Autotest modes first

■While in Autotest mode, it is only possible to STORE.

■To clear all memory, push both RECALL and CANCEL

together for 3 seconds. clr will display.

■To store in next location, push STORE.

■To change next store location, push SELECT -/+, SET.

■To recall, push RECALL -/+ to scroll through data.

■To exit memory display, push CANCEL.

ADDITIONAL AUTOTEST MEMORY OPERATION

■To read or cancel memory, first exit Autotest mode, and

enter Power Meter mode.

■Autotest memory: use -/+ to scroll wavelengths.

OPTICAL POWER METER

N3970A

Congratulations on your purchase of this instrument,

which has been engineered to provide the best possible

reliability, convenience and performance. To get the best

use from your equipment and ensure its safe operation,

please spend a few minutes to read this manual.

■INTRODUCTION AND APPLICATIONS

■CONTENTS

BEFORE READING FURTHER, OPEN THE CONTROL PANEL PICTURE AT THE BACK OF THE MANUAL

Service and Support 3

Introduction & applications 4-5

Safety Summary 6-7

Battery and external power 8

Optical connector 9-10

How to use:

Getting started and turning on 11-12

Autotest operation 13-14

Power meter operation 15

Storing & recalling readings 16-17

RS232 interface 18

Care of your instrument 19

Accuracy considerations 20-21

Calibration, maintenance & instrument returns 22-24

Specifications - Definition of terms 25

Specifications and ordering information 26-28

Performance test 29-38

Cleaning information 39-40

Cleaning procedures 41

Disclaimer & warranty 42

Notes 43-44

N3970A UM-1

■ SERVICE AND SUPPORT

Any adjustment, maintenance, or repair of this product must be

performed by qualified personnel. Contact your customer

engineer through your local Agilent Technologies Service

Center. You can find a list of local service representatives on the

Web at: http://www.agilent.com/find/assist

If you do not have access to the Internet, one of these centers

can direct you to your nearest representative:

United States 1 800 452 4844

Canada 1 877 894 4414

(905) 206 4120 (Fax)

Europe (31 20) 547 2323

(31 20) 547 2390 (Fax)

Japan (81) 426 56 7832

(81) 426 56 7840 (Fax)

Latin America (305) 269 7500

(305) 269 7599 (Fax)

Australia 1 800 629 485

(613) 9272 0749 (Fax)

New Zealand 0800 738 378

64 4 495 8950 (Fax)

Asia-Pacific (852) 3197 7777

(852) 2506 9284 (Fax)

■ INTRODUCTION AND APPLICATIONS

The N3970A Optical Power Meter is used for field or laboratory

testing of fiber optic systems at typically 850, 1300, 1310 and

1550 nm. It features superb measurement confidence, ease of

use and reduced cost of ownership, and is for use by installers,

technicians and engineers.

Superior measurement confidence is achieved with a unique

Total Uncertainty specification over the full temperature,

measurement and connector range, and a NATA traceable

calibration certificate. The display hold and back light facilities

help acquire readings, and the flexible memory helps record

your results

Autotest mode enables automatic λ(wavelength) detection and

attenuation measurement (in combination with an Autotest

source). A single or dual λsource and meter in Autotest mode

automatically measure single or dual λattenuation in one

direction.

High operational reliability & availability is achieved with 250

hour battery life, 3 year recommended re-calibration cycle,

negligible warm up and no range-changing delays. Dark current

offset is not required. An external power input is also provided.

The combination of features enables reduced equipment

inventory, simpler training, shorter procedures, lower skill

levels and direct labour savings in many situations, combining

to give lower cost of ownership.

The innovative optical connector port provides drop protection

during use, and is dust protected by a snap on cover. The

interchangeable optical connector system is very versatile, and

easily disassembled for cleaning.

The simple user interface guides the operator through functional

sequences, and a hidden keypad is used to access advanced

features such as log/linear display, and memory functions.

N3970A UM-1

The tone detector is very sensitive, and is useful for fiber

identification, and calibrating the modulation frequency of test

tone sources.

The instrument has shock absorbent corners, and a tough

polycarbonate housing which has passed extensive drop testing.

Typical applications

■Singlemode testing, with versatile interchangeable

connectors.

■Telecom construction, maintenance, CATV, LAN and R&D

applications.

■Measurements where traceability and documentation are

required.

■Quality assurance and acceptance tests.

■Automated testing and reporting using optional Excel software.

■Test tone measurement & fiber identification.

■ INTRODUCTION AND APPLICATIONS

■ SAFETY SUMMARY

The following general safety precautions must be observed

during all phases of operation, service, and repair of this

instrument. Failure to comply with these precautions or with

specific warnings elsewhere in this manual violates safety

standards of design, manufacture, and intended use of the

instrument. Agilent Technologies Inc. assumes no liability for

the customer’s failure to comply with these requirements.

Before operation, review the instrument and manual, for safety

markings and instructions. You must follow these to ensure safe

operation and to maintain the instrument in safe condition.

WARNING

The WARNING sign denotes a hazard. It calls attention to a

procedure, practice or the like, which, if not correctly performed

or adhered to, could result in injury or loss of life. Do not

proceed beyond a WARNING sign until the indicated conditions

are fully understood and met.

CAUTION

The CAUTION sign denotes a hazard. It calls attention to an

operating procedure, or the like, which, if not correctly

performed or adhered to, could result in damage to or

destruction of part or all of the product. Do not proceed beyond

a CAUTION sign until the indicated conditions are fully

understood and met.

CAUTION

The apparatus will be marked with this symbol when it is

necessary for the user to refer to the instruction manual in order

to protect the apparatus against damage.

N3970A UM-1

■ SAFETY SUMMARY

Initial Inspection

Inspect the shipping container for damage. If there is damage to

the container or Cushioning, keep them until you have checked

the contents of the shipment for completeness and verified the

instrument both mechanically and electrically.

The Performance Tests give procedures for checking the

operation of the instrument. If the contents are incomplete,

mechanical damage or defect is apparent, or if an instrument

does not pass the operator’s checks, notify the nearest Agilent

Technologies Sales/Service Office (see page 3).

WARNING

To avoid any hazard, do not perform electrical tests when there

are signs of shipping damage to any portion of the outer

enclosure (covers, panels, and so on).

WARNING

You MUST return instruments with malfunctions to an Agilent

Technologies Service Center for repair and calibration (see page 3).

Line Power Requirements

The Agilent N3970A Power Meter operates at line power when

applied to the optional external power supply N3979A 9V DC

Operating Environment

The Agilent N3970A Power Meter can be operated at

temperatures between - 10°C and + 55°C and at relative

humidity of <95%.

Storage and Shipment

The Agilent N3970A Power Meter can be stored or shipped at

temperatures between - 25°C and + 70°C and at relative

humidity of less than 95%. Protect the module from

temperature extremes that may cause condensation within it.

REQUIREMENT COMPLIANCE

N 10149

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