HP 81541MM Owner's manual

Operating and Programming Manual
HP 81541MM Lightwave
Multimeter Source Module
SERIAL NUMBERS
This manual applies to all instruments.
ABCDE
HP Part No. 81541-90011
Printed in the Federal Republic of Germany
First Edition
E1092

Notices
This document contains proprietary
information which is protected by
copyright. All rights are reserved.
No part of this document may be
photocopied, reproduced, or
translated to another language
without the prior written consent of
Hewlett-Packard GmbH.
c
 Copyright 1992 by:
Hewlett-Packard GmbH
Herrenberger Str. 130
7030 Boeblingen
Federal Republic of Germany
Subject Matter
The information in this document is
subject to change without notice.
Hewlett-Packard makes no warranty
of any kind with regard to this
printed material, including, but not
limited to, the implied warranties of
merchantability and tness for a
particular purpose.
Hewlett-Packard shall not be liable
for errors contained herein or for
incidental or consequential damages
in connection with the furnishing,
performance, or use of this material.
Printing History
New editions are complete revisions
of the manual. Update packages,
contain additional and replacement
information to be incorporated into
the manual by the customer. The
date on the title page only changes
when a new manual is published.
When an edition is reprinted, all the
prior updates to the edition are
incorporated.
Warranty
This Hewlett-Packard instrument
product is warranted against defects
in material and workmanship for a
period of one year from date of
shipment. During the warranty
period, HP will, at its option, either
repair or replace products which
prove to be defective.
For warranty service or repair, this
product must be returned to a service
facility designated by HP. Buyer shall
prepay shipping charges to HP and
HP shall pay shipping charges to
return the product to Buyer.
However, Buyer shall pay all shipping
charges, duties, and taxes for
products returned to HP from
another country.
HP warrants that its software and
rmware designated by HP for use
with an instrument will execute its
programming instructions when
properly installed on that instrument.
HP does not warrant that the
operation of the instrument,
software, or rmware will be
uninterrupted or error free.
Limitation of Warranty
The foregoing warranty shall not
apply to defects resulting from
improper or inadequate maintenance
by Buyer, Buyer-supplied software or
interfacing, unauthorized
modication or misuse, operation
outside of the environmental
specications for the product, or
improper site preparation or
maintenance.
No other warranty is expressed or
implied. Hewlett-Packard specically
disclaims the implied warranties of
Merchantability and Fitness for a
Particular Purpose.
Exclusive Remedies
The remedies provided herein are
Buyer's sole and exclusive remedies.
Hewlett-Packard shall not be liable
for any direct, indirect, special,
incidental, or consequential
damages whether based on contract,
tort, or any other legal theory.
Assistance
Product maintenance agreements
and other customer assistance
agreements are available for
Hewlett-Packard products.For any
assistance contact your nearest
Hewlett-Packard Sales and Service
Oce.Addresses are provided at
the back of this manual.
Certication
Hewlett-Packard Company certies
that this product met its published
specications at the time of
shipment from the factory.
Hewlett-Packard further certies
that its calibration measurements
are traceable to the United States
National Institute of Standards and
Technology, NIST (formerly the
United States National Bureau of
Standards, NBS) to the extent
allowed by the Institutes's
calibration facility, and to the
calibration facilities of other
International Standards Organization
members.
Control Serial Number: Edition 1 applies directly to all instruments.
Edition 1 : 1st March 1991 : 81541-90011 : E0391
: 1st October 1992 : 81541-90011 : E1092

Safety Considerations
Before operation, review the instrument and manual, including the red safety
page, for safety markings and instructions
.You must follow these to ensure safe
operation and to maintain the instrument in safe condition.
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 veried 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 Hewlett-Packard oce.
Warning
To avoid hazardous electrical shock, do not perform
electrical tests when there are signs of shipping damage to
any portion of the outer enclosure (covers, panels, etc.).
Line Power Requirements
The HP 81541MM operates when installed into the HP 8153A Lightwave
Multimeter mainframe
Operating Environment
The HP 8153A safety information summarizes the HP 81541MM operating
environment ranges. In order for the HP 81541MM to meet specications, the
operating environment must be within the limits specied for the HP 8153A.
Storage and Shipment
The module can be stored or shipped at temperatures between 0 40

C and
+70

C. Protect the module from temperature extremes that may cause
condensation within it.
v

Contents
C. HP 81541MM Specications
Suppelementary Performance Characteristics .... .. .. .. C-2
Internal Digital Modulation . . . . . . . . . . . . . . . . . . C-2
Output Attenuation .. .. .. .. .. .. .. .. .. .. . C-2
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
D. Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . D-1
Test Record .......................... D-2
Test Failure .......................... D-2
Instrument Specication .... .. .. .. .. .. .. .. .. D-2
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . D-2
Output Power and Stability Tests .... .. .. . .. .. .. D-3
1. Output Power Test ................... D-3
2. Attenuation Function Test................ D-4
3. Modulation Function Test ................ D-4
4. Stability Test ...................... D-4
E. Cleaning Procedures
Cleaning Materials . . . . . . . . . . . . . . . . . . . . . . . E-1
Cleaning Fiber/Front-Panel Connectors .... .. .. . .. .. E-2
Cleaning Connector Interfaces .... .. .. .. .. .. . .. E-2
Cleaning Connector Bushings . . . . . . . . . . . . . . . . . . E-3
Cleaning Detector Windows .................. E-3
Cleaning Lens Adapters ...... .. .. .. .. .. .. .. E-3
Cleaning Detector Lens Interfaces .... .. .. .. .. .. . E-4
Contents-1

Figures
D-1. Performance Test Setup ................... D-3
Tables
C-1. HP 81541MM Specications . . . . . . . . . . . . . . . . . . C-1
Contents-2

C
HP 81541MM Specications
Specications describe the instrument's warranted preformance. Supplementary
performance characteristics describe the instrument's non-warranted typical
performance.
Because of the modular nature of the instrument, these performance
specications apply only to this module.You should insert these pages into the
appropriate section of the manual.
Table C-1. HP 81541MM Specications
Type LED
Central Wavelength
[1]
850nm 6 30nm
Fiber Type MM 50/125  m
Spectral Bandwidth (FWHM) < 90nm
Output Power > -17dBm
CW-Stability
[1]
Short Term (15min, T=Constant) 6 0.003dB
Long Term (6h, T=0 to 55

C 6 1K) 6 0.03dB
Dimensions 75mm H, 32mm W, 335mm D
(2.8 " 2 1.3 " 2 13.2 " 2 )
Weight net 0.7kg (1.5lbs), shipping 1kg (2.2lbs)
Recalibration Period 1 year
[1]
After a warmup time of 60min. with output enabled. If previously
stored at the same temperature, only 20min. warmup required.
HP 81541MM Specications C-1

Suppelementary Performance Characteristics
Internal Digital Modulation
You can select internal modulation frequencies of 270HZ, 1kHz, or 2kHz. All
outputs are pulse shaped, with a duty cycle of 50%.
Output Attenuation
The output can be attenuated from 0 to 6dB, in steps of 0.1dB.
Stability
The value of the long term stability doubles with just one minute warmup time
(source enabled).
C-2 HP 81541MM Specications