Agilent 70810B User Manual

HP 70810B
Lightwave Section
(includes Option 850)
User's Guide
ABCDE
A
Printed
in US
Printed in USA June 1994
First Edition
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Publication
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and
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,
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the
followed
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by
in
has
348,
has
contains
user
safe
a
designed
been
equirements
Safety
R
been supplied
information
to
ensure
safe operation
condition.
tested
and
for
safe
in a
warnings which
and
accordance
in
Electronic
condition.
to
and
Measuring
instruction
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ackard
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1991,
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Safety Notes
Warning
Caution
No operator-serviceable parts inside. Refer servicing to
qualied personnel. To prevent electrical shock, do not remove
covers.
For continued protection against re hazard, replace line fuse
only with same type and ratings (type 6.3A/250V). The use of
other fuses or materials is prohibited.
This is a Safety Class 1 Product (provided with a protective
earthing ground incorporated in the power cord.) The mains
plug shall only be inserted in a socket outlet provided with a
protective earth contact. Any interruption of the protective
conductor inside or outside of the instrument is likely to
make the instrument dangerous. Intentional interruption is
prohibited.
If this instrument is not used as specied, the protection
provided by the equipment could be impaired. This instrument
by
for
this
not
II
and
must be
used in
protection
Always use
instrument.
this
using
instrument
This
ollution
P
Degree
normal
a
intact)
are
the three-prong
ailure to
F
cause
may
cord
designed
is
per
2
condition
.
only
A
ensure
instrument
for
1010
IEC
power
C
adequate
in
use
and
which
(in
supplied
cord
earth
damage
Installation
respectively
664
means
all
with
grounding
.
Category
.
entilation
V
cabinet,
restricted.
than
less
4
by
power
for
C
dissipated
Requirements:
convection
the
ambient
The
maximum
the
every
100
in
watts
the
When
and
into
temperature
operating
dissipated
cabinet
forced convection must be used.
installing
the
of
out
(outside
temperature
in
greater
is
instrument
the
instrument
the
of
cabinet.
the
800
than
must
cabinet)
instrument
the
If
watts
the
,
in
not
must
total
then
a
be
be
iii
Using the HP 70810B Lightwave Section
This user's guide provides installation, troubleshooting, operation, and
programming details for a lightwave section that has been congured
as an independent element (stand-alone operation).
An HP 70810B lightwave section can also be congured for operation
as a slave element in a modular lightwave signal analyzer.When
congured as a slave element, a lightwave section is part of an HP
71400C or HP 71401C lightwave signal analyzer.For system-level
conguration information, refer to the
Analyzer Installation and Verication Manual
local-oscillator-controlled modules.
An HP 70810A lightwave section cannot be congured as a slave
element.
HP 70000 Modular Spectrum
for HP 70900B
iv
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.
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, to the extent allowed by the Institute's calibration facility,
and to the calibration facilities of other International Standards
Organization members.
v
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, Hewlett-Packard Company
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 Hewlett-Packard. Buyer shall prepay
shipping charges to Hewlett-Packard and Hewlett-Packard shall pay
shipping charges to return the product to Buyer. However, Buyer shall
pay all shipping charges, duties, and taxes for products returned to
Hewlett-Packard from another country.
Hewlett-Packard warrants that its software and rmware designated
by Hewlett-Packard for use with an instrument will execute
its programming instructions when properly installed on that
instrument. Hewlett-Packard does not warrant that the operation
of the instrument, or software, or rmware will be uninterrupted or
error-free.
arranty
W
of
tion
a
Limit
misuse
the
for
.
.
IMPLIED
FOR
NOT
from
AND
foregoing
The
improper
software
operation
product,
OTHER
NO
HEWLETT-P
ARRANTIES
W
ARTICULAR
P
clusive
Ex
REMEDIES
THE
EXCLUSIVE
LIABLE
warranty
inadequate
or
interfacing,
or
the
outside
or
of
improper site
WARRANTY
CKARD SPECIFICALL
A
OF MERCHANT
PURPOSE.
Remedies
VIDED
PRO
REMEDIES.
DIRECT
ANY
FOR
apply
not
shall
maintenance
unauthorized
environmental
preparation
EXPRESSED
IS
Y
ABILITY
HEREIN
HEWLETT-P
INDIRECT
,
defects
to
,
Buyer
by
modication
specications
maintenance
or
IMPLIED
OR
DISCLAIMS
FITNESS
AND
BUYER'S
ARE
CKARD
A
SPECIAL,
,
resulting
Buyer-supplied
or
THE
SOLE
SHALL
INCIDENT
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT,
TORT, OR ANY OTHER LEGAL THEORY.
,
A
BE
AL,
OR
vi
Instrument Markings
arnings
W
The instruction documentation symbol. The product
L
is marked with this symbol when it is necessary
for the user to refer to the instructions in the
documentation.
\CE" The CE mark is a registered trademark of the
European Community. (If accompanied by a year,itis
when the design was proven.)
\ISM1-A" This is a symbol of an Industrial Scientic and Medical
Group 1 Class A product.
\CSA" The CSA mark is a registered trademark of the
Canadian Standards Association.
Caution
arning
W
Key Conventions
Caution
not
destruction
until
arning
W
not
if
or
indicated
4
Front-panel key
denotes
correctly
indicated
the
correctly
of
loss
performed
of
denotes
life
conditions
5
NNNNNNNNNNNNNNNNNNNNNNN
Softkey
Input Text
Message Text
hazard.
a
instrument.
the
conditions
hazard.
a
performed
not
Do
.
It
adhered
or
proceed
fully
are
attention
calls
not
Do
fully
are
calls
It
adhered
or
beyond
understood
could
,
to
proceed
understood
attention
,
to
warning
a
a procedure
to
in
result
beyond
and
a
to
result
could
met.
and
procedure
note until
that, if
damage to
caution
a
met.
injury
in
Text shown like this represents a key physically
located on the spectrum analyzer.
Text shown like this represents a softkey.(The
softkeys are located next to the softkey labels,and
the right
the
left
softkey
of
side
labels
the
the
are
spectrum
annotation
analyzer
on
display
.)
Text printed in this typeface indicates text you
via the keypad or using programming commands
Text printed
in this typeface indicates text displayed
on the instrument's screen.
or
note
that,
the
or
enter
.
vii
What You'll Find in This Manual
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter
Chapter
\Getting Started," describes the HP 70810B lightwave
section and shows you how to install it.
\System Verication," shows you how to verify basic
lightwave section functions.
\Operating," describes how to operate a lightwave
section that has been congured for stand-alone
operation.
\Programming," describes how to operate a lightwave
section by remote computer control.
\Specications and Characteristics," contains the
module specications for the HP 70180B and HP
70810B Option 850 lightwave sections, and any
required regulatory information.
\Menu Maps," illustrates the display menu
lightwave
the
Reference
and
.
and
,
HP
an
section
for
front-
and
Commands
functions
70810B
as
,"
rear-panel
or
stand-alone
a
organization
7
\Dictionary
softkeys
connectors
8
\Programming
parameters
operate
lightwave
section
contains
describes
,"
the
of
70810B
HP
softkeys
description of
a
features
the
commands
Option
lightwave
.
and
syntax,
used
850
receiver
to
.
Chapter
9
Chapter 10
Chapter 11
\Error
Messages
troubleshooting
70810B
HP
congured
\Tables
you
tells
Option 850
for
and Charts
how to
provides
,"
information
stand-alone operation.
," lists
contact an
module-level
for an
HP 70810B
lightwave section
accessories
options
and
HP sales
and
when
service
or
it
oce.
\Conguring and Addressing," explains how to
address one or more HP 70810B lightwave sections
for stand-alone operation and provides general
addressing
systems
.
information
for modular
measurement
is
and
viii
Contents
1. Getting Started
What You'll Find in This Chapter ........... 1-1
Introducing the Lightwave Section . . . . . . . . . . . 1-2
Lightwave Section Serial Numbers . . . . . . . . . . 1-3
Installing the Lightwave Section for Stand-Alone
Operation.. ...... ........ ..... 1-4
To install the HP 70810B module .......... 1-5
To remove the HP 70810B module . . . . . . . . . . 1-6
Changing Measurement Parameters with an HP 71400C or
HP 71401C ...... ........ ...... 1-7
.
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Optical
Caring
for
Cleaning Optical
Reducing Electrostatic
PC
T
Board
est
Assemblies and
Equipment .
Static-Safe
our
return
erication
V
ou'll
Y
Basic
verify
Y
Kit
the
a
Find
basic
2.
Servicing
Service
Returning
o
T
System
What
erifying
V
o
T
Connectors
Connectors .
..
ccessories .
A
Module
.
.
.
.
in
for
for
This
Module
module
Functions
functionality
Discharge (ESD)
.
Using the
.
Chapter
.
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..
..
Damage .
Electronic Components
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Service
service
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71000
HP
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1-8
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1-8
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1-9
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1-9
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1-10
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1-10
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1-11
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1-12
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1-12
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2-1
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2-2
.
2-2
.
70810B Lightwa
HP
e
v
Section
User's
Guide
3. Operating
What You'll Find in This Chapter ........... 3-1
An Overview of Operation .......... .... 3-2
Calibration . . . . . . . . . . . . . . . . . . . . . 3-2
Display Annotation . . . . . . . . . . . . . . . . . 3-3
Keys
Display
Overview
An
Using
Front-P
the
anel
of
Front
Softkeys
anel
P
Front-Panel and Rear-P
Front-Panel LEDs . . . . . . . . . .
Connectors and Latches . . . . . . . . . . . .
Cleaning Connections for A
To clean a dry connector
.
.
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..
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..
Data
Enter
to
eatures . . . . .
anel F
ccurate Measurements
...
...... .....
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.. 3-9
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To clean a wet connector ...... ...... .. 3-10
To apply index-matching compound ......... 3-10
3-5
.
3-6
.
3-6
.
3-7
3-7
3-8
3-9
Contents-1
4. Programming
What You'll Find in This Chapter ........... 4-1
Getting Set Up for Remote Operation ...... ... 4-2
Communicating with the Lightwave Section ...... 4-3
Executing Remote Commands . . . . . . . . . . . . 4-3
Syntax Requirements . . . . . . . . . . . . . . . 4-4
Local and Remote Control . . . . . . . . . . . . . 4-4
Initial Program Considerations . . . . . . . . . . . . 4-5
Transferring Data to the Computer .......... 4-6
Requesting and Receiving Data .......... . 4-6
Monitoring System Operation ........ ..... 4-8
Interrupt Process . . . . . . . . . . . . . . . . . . 4-8
Lightwave Section Status Byte .......... 4-9
The Service-Request Mask . . . . . . . . . . . . . 4-9
Service-Request Examples . . . . . . . . . . . . . . 4-10
Monitoring System Operation without Using Service
Requests .................... 4-11
5. Specications and Characteristics
What You'll Find in This Chapter ........... 5-1
.
.
.
.
..
..
..
..
.
.
.
Conguration
70810B
HP
70810B
HP
Module
Lightwave
RF
RF
HSWP
Module
Option
Input
Input
Output
In/Out .
Modes
and
Input
.
.
.
.
.
Specications
Module
850
Output
.
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Specications
Characteristics
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5-2
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5-3
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5-6
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5-10
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5-10
5-10
.
5-10
.
5-10
.
Menu Maps
6.
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.
Chapter
Find in
You'll
What
Dictionary
7.
What
Alphabetical
8. Programming Commands
What You'll Find in This Chapter ........... 8-1
Syntax Conventions ................. 8-2
Pictorial Notation . . . . . . . . . . . . . . . . . . 8-2
ext Notation
T
Command
Syntax
QueryResponses .............
Common Command P
AUNITS
CAL
CALCOR
DONE
ERR
.
HD
.
ID
IP
LTWAVE
MSG
Reference
Find
ou'll
Y
Listing
Sequence .
Summary
.................
..................
...........
......................... 8-13
......................... 8-14
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This
Chapter
This
in
Softkeys
of
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arameters ...... .....
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and Latches
Connectors
,
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6-1
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7-1
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7-2
8-2
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8-2
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8-3
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8-4
8-5
8-10
8-11
8-12
8-15
.
8-16
.
8-17
.
8-18
.
8-19
.
Contents-2
HP 70810B
Lightwa
e
v
Section
User's
Guide
OPTATN
OPTCOR
OPTPWR
REV
RQS
RSPSVTY
SER
SRQ
STB
TEST
USERMSG
XERR
ZERO
9. Error Messages
What You'll Find in This Chapter ........... 9-1
Troubleshooting Features ............... 9-2
Display Status Indicators .. ........ .... 9-2
Lightwave Section Status Indicators . . . . . . . . . 9-2
Catastrophic
Troubleshooting
Error
Operating
Computation Errors 4000 to 4999 ...... .... 9-8
Hardware W
Hardware-Broken Errors 7000 to 7999 . . . . . . . .
actory-Use
F
.... ........ ...... ..... 8-21
.... ........ ...... ..... 8-22
.... ........ ...... ..... 8-24
..... ....... ...... ....... 8-25
..... ....... ...... ....... 8-26
.... ........ ...... ..... 8-28
..... ....... ...... ....... 8-29
..... ....... ...... ....... 8-30
..... ....... ...... ....... 8-32
..... ....... ...... ....... 8-34
.... ........ ...... ..... 8-35
..... ....... ...... ....... 8-36
..... ....... ...... ....... 8-38
Status Error Indicators .............. 9-2
.
.
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..
..
..
..
.
.
Indicators
ctive
A
ailures
F
Message
2001
2003
2006
2011
2018
2023
2031
2032
2035
2802
2803 Illegal in bypass
4000 Divide by zero
4001 Float overflow
4002 Float underflow
4003
4004
4005
6802 Invalid cal data
6805 Firmware changed
6806 Avg pwr over-range
7801 Optical atten failed
7802 ADC error
7803
7804
7805
Descriptions
Errors
Illegal
Missing
Parm out
Memory overflow
State protected
Illegal Cal
Too many
Hardware
Illegal
Illegal
Logarithm error
Integer overflow
Square root
arning Errors 6000 to 6999
Power
Self
Zeroing
Only
.
.
Lightwave
a
2000
command
parameter
of
errors
not
operation
in
meter
failed
test
error
Errors
.
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Section
.
.
2999
to
.
range
.
.
signal
.
present
mode
LW
.............. 9-8
...... ....... 9-8
...... ....... 9-8
.
error
................ 9-9
failed
.
.
to
9000
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9999
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9-3
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9-4
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9-5
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. 9-6
. 9-6
9-6
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9-6
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9-7
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9-7
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9-7
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9-7
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9-7
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9-7
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9-7
9-8
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9-8
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9-8
9-8
9-8
9-8
9-9
9-9
9-9
9-9
.
9-9
.
9-9
.
9-10
70810B Lightwa
HP
e
v
Section
User's
Guide
Contents-3
10. Tables and Charts
What You'll Find in This Chapter ........... 10-1
Instrument Options . . . . . . . . . . . . . . . . . . 10-2
Accessories Supplied with the Product . . . . . . . . 10-2
Service Kit Accessories .. ...... ........ 10-3
Contacting HP Sales and Service Oces ........ 10-4
11. Conguring and Addressing
What You'll Find in This Chapter ........... 11-1
HP-MSIB and HP-IB Addressing ............ 11-2
Modular Measurement System Terminology . . . . . . . 11-3
Functional Terms.................. 11-3
Structural Terms .................. 11-3
Address Matrix . . . . . . . . . . . . . . . . . . . . 11-4
HP-IB Access Area ................. 11-4
Display-Response Area ............... 11-4
Display Communication Capabilities ......... 11-5
Address Switches . . . . . . . . . . . . . . . . . . . 11-6
HP 70810B Address Switches ............ 11-6
Soft-Set HP-IB Addresses .... ........ .. 11-6
Default
ddress
A
A
Map
ddress
for
.
Stand-Alone
Operation
..
..
..
.
.
.
.
..
..
..
..
.
.
Index
.
.
.
..
11-6
11-8
Contents-4
HP 70810B
Lightwa
e
v
Section
User's
Guide
Figures
ables
T
1-1. Typical Serial Number Label ............ 1-3
1-2. Module Removal/Replacement . . . . . . . . . . . . 1-5
1-3. HP 70810B Address Switch Position for Stand-Alone
Operation.................... 1-6
1-4. Static-Safe Workstation ............... 1-9
2-1. Initial Operation Test Equipment Setup ....... 2-2
2-2. Average Power Display from an HP 70810B in
Stand-Alone Operation ............. 2-3
2-3. Spectrum Analyzer Display of Modulation Spectrum . 2-4
3-1. Display Annotation for Stand-Alone Operation .. .. 3-3
3-2. HP 70810B Front Panel and Rear Panel ....... 3-7
.
.
.
6-1. Softkey
8-1. Numeric
8-2. Binary
11-1. The
A
11-2. Typical
ddress
A
11-3.
Menu Map
Value
State
ddress
70810B
HP
Map
Query
Query
Matrix
Multiple
for
Stand-Alone
for
Response
Response
.
.
.
ddress
A
Lightwave
.
.
Switch
.
.
.
.
.
Operation
.
.
.
.
.
.
.
.
.
.
.
Sections
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
..
6-2
8-4
8-4
11-4
11-7
11-8
70810B Lightwa
HP
e
v
Section
User's
Guide
1-10
.
.
.
.
.
.
.
..
..
.
.
.
Data
Status
.
Byte
.
..
..
..
.
..
..
..
..
.
.
.
..
.
.
4-10
.
.
1-1.
4-1.
4-2.
Static-Safe
for
Units
Lightwave
ccessories
A
Returned
Section
5-1. HP 70810B Specications and Characteristics (1 of 2) . 5-4
5-1. HP 70810B Specications and Characteristics (2 of 2) . 5-5
5-2. HP 70810B Option 850 Specications and
Characteristics (1 of 2) . . . . . . . . . . . . . . 5-7
5-2. HP 70810B Option 850 Specications and
Characteristics (2
5-3.
HP
70810B
and
Specications
8-1. Commands by Functional Group . . . . . . . .
8-2. Alphabetical Command Summary
of
70810B
HP
Characteristics
and
Option
General
850
..
.
.
.
.
.
...
..........
.
.
.
.
.
..
.
.
.
.
.
.
.
.
2)
8-3. Programming Commands Executed or Aected by
Instrument Preset . . . . . . .
8-4. Lightwave Section Status Byte
.........
.....
......
8-17
8-27
8-5. Lightwave Section Status Byte ...... ..... 8-31
8-6. Lightwave Section Status Byte ...... ..... 8-33
10-2
.
.
..
.
.
Number
art
.
.
.
Oces
.
10-3
.
.
.
.
.
.
.
10-5
.
.
.
.
.
.
10-1.
10-2.
10-3.
ccessories
A
71000
HP
71000-60002)
Hewlett-P
Shipped
System
ackard
with
Service
.
.
Sales
.
and
the
Kit
.
.
Service
HP
(HP
.
70810B
P
.
.
Contents-5
4-6
5-8
5-9
8-7
8-8
11-1. Decimal Equivalent of Binary Address . . . . . . . . 11-4
Contents-6
HP 70810B
Lightwa
e
v
Section
User's
Guide
Getting Started
This chapter describes the HP 70810B lightwave section and shows
you how to install it.
What You'll Find in This Chapter
1
Note
Introducing the Lightwave Sections
:::::::::::::::::::::::::
page 1-2
Installing the Lightwave Section for Stand-Alone Operation page 1-4
HP
Changing
71401C
Caring
Reducing
Servicing
Returning
Measurement
:
:
:
Optical
for
Electrostatic
our
Y
the
When operated
HP
requires
an
:
:
:
:
Module
as a
70900B
P
::
:
:
:
:
:
:
:
:
:
Connectors
Discharge (ESD)
Module
Using the
for
slave element,
local
arameters
:
:
:
::
::
::
:
:
:
HP
Service
the
oscillator
an
with
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
Damage
71000
:
:
:
:
:
:
:
:
:
70810B
HP
module with
HP
:
:
:
:
:
::
:
:
:
Service
:
:
:
:
:
71400C
::
::
:
::
:
:
:
lightwave
or
page
:
:
:
:
:
:
::
::
page
:
:
:
:
:
:
:
:
:
:
:
page
:
:
:
:
:
:
:
:
:
:
:
page
:
:
:
:
Kit
page
::
:
:
:
:
:
:
:
:
section
rmware date
code 911021 or later for proper operation.
1-7
1-8
1-9
1-11
1-12
70810B Lightwa
HP
e
v
Section
User's
Guide
Getting
Started
1-1
Introducing the Lightwave Section
HP 70810B and HP 70810B Option 850 lightwave sections are
1/8-width modules designed to work in an HP 70000 modular
measurement system mainframe. They both have Hewlett-Packard
Interface Bus (HP-IB) and Hewlett-Packard Modular System Interface
Bus (HP-MSIB) communication capabilities. Either lightwave section
can function in the following congurations:
As a stand-alone instrument that will measure average optical
power and provide an amplied electrical signal output
corresponding to the intensity-modulated signal level.
As a lightwave signal analyzer with a 22 GHz modulation bandwidth
capability and calibrated system response (HP 71400C lightwave
signal analyzer system).
As a lightwave signal analyzer with a 2.9 GHz modulation
bandwidth capability and calibrated system response (HP 71401C
lightwave signal analyzer).
70810B
HP
The
measurement
for an
kHz to
Option
22
dBm/pHz
lightwave
range
850)
with
GHz
Lightwave
.
communication capability
a module-control
module capability
1200
of
detected
a
and
input
an
section
,
processor
.
section
nm
noise
features
optical
that
provides
1600
to
modulation
equivalent
electrical
and
provides
a
(750
nm
include
either
wavelength
to
nm
bandwidth
HP-IB
input
slave
of
and
connectors
or
power
nm
870
100
of
64
0
HP-MSIB
stand-alone
,
and
modular
a
Typically,
electrical
71100C
HP
congured
analyzer
signal
modulation
optical
ber
HP
the
spectrum
spectrum
RF
an
with
The
.
present
The
.
70810B
analyzer
analyzer
70810B
HP
lightwave
lightwave
a
on
displayed
RF
as
such
An
.
lightwave
system
the
an
electrical
detects
signal
HP
section
transmitted on
precedes
,
intensity-modulation
section
in
71210C microwave
spectrum analyzer
a lightwave
is
displays intensity
and
single-mode
incorporates
or
frequency-response calibration corrections that compensate for
photodetector responsivity and preamplier gain variations.The
factory determines responsivity values for 1300 nm and 1550 nm
wavelengths (850 nm for an Option 850). The user can select one
of these values or calibrate the lightwave section to some other
reference
Basically
photodetector, microwave preamplier
.
the
HP
70810B
consists
of
optical
attenuator
, and optical power meter
, broadband
. The
lter-wheel attenuator provides up to 30 dB of optical attenuation
programmed in 1 dB steps
PIN photodetector
, which detects the modulation and
. A lens focuses the light onto a high-speed
converts
optical power to electrical current (photons to electrons). One path
for the detected current drives the high-gain, low noise, four-stage
preamplier, which consists of four traveling-wave GaAs MMICs
(gallium-arsenide microwave-monolithic integrated circuit).
gain
dB
with
32
second
A
a
path
transimpedance
lightwave
The
an
and
monitors
8
dB
the
section
gure
noise
detected
preamplier
100
from
current's
DC
typically
22
to
kHz
component
provides
GHz.
an
Getting Started
1-2
HP
70810B
Lightwa
e
v
Section
User's
Guide
circuit, which determines a value representing average optical power.
The average power value appears on the display as both a real-time
vertical power bar and a digital power readout.
In a stand-alone conguration, the lightwave section functions as an
optical detector and average power meter. When lightwave mode
is selected, the lightwave section produces an electrical output that
is the amplied, uncorrected, detected intensity modulation of a
modulated optical input signal. The lightwave section also has an
RF input for conventional RF signal inputs. When RF bypass mode
is selected, the RF input is connected directly to the RF output,
bypassing the preamplier and all optical hardware. A spectrum
analyzer or other electrical measurement instrument must be
connected to the RF output to make use of the electrical output signal
produced in either lightwave or RF bypass mode.
An important feature of the HP 70810B is its versatile input connector
system. A variety of screw-on optical connector interface options are
now available,suchas:
Diamond HMS-10/HP
FC/PC
47256
DIN
Biconic
ST
optical
are
cords
atch
P
connector
Hewlett-P
latest
systems
ackard
lightwave measurement
also
,
sales
available
as
such
and
that
Radiall.
the
service
accessories
accommodate
Contact
for
oce
.
other
local
your
information
about
the
Lightwave
Section
Serial
Numbers
the
and
sux.
to
the
which
two-part
A
frame
front
letter are
Figure 1-1
serial number
of the
the serial
lightwave section.
number prex;
.) Identical
appears on
the
The
the last
lightwave sections
label
mylar
four
rst
digits
ve
have the
attached
digits
the
,
same
prex,
changes only for signicant modication. The sux is dierent for
each lightwave section.
Figure 1-1. Typical Serial Number Label
(See
70810B Lightwa
HP
e
v
Section
User's
Guide
Getting
Started
1-3
Installing the Lightwave Section for Stand-Alone Operation
This section tells you how to install the HP 70810B lightwave section
in an HP 70000 modular measurement system mainframe. When
the HP 70810B is shipped as part of an HP 71400C or HP 71401C
lightwave signal analyzer, the factory addresses and interconnects
all system components. Refer to the
Analyzer Installation and Verication Manual for HP 70900B
Local-Oscillator Controlled Modules
Any future shipment of the instrument requires the original packing
materials or their equivalents.For detailed packing and shipping
information, refer to \Returning the Module for Service" in this
chapter.
HP 70000 Modular Spectrum
for system-level information.
Getting Started
1-4
HP
70810B
Lightwa
e
v
Section
User's
Guide
To install the HP 70810B module
1. Inspect the shipping container or cushioning material for damage.
If there is damage or a defect, save the packing materials,lea
claim with the carrier, then contact the nearest Hewlett-Packard
sales and service oce for immediate repair or replacement.
2. Set the mainframe LINE switch to OFF, then swing down the front
door. See Figure 1-2.
Note
The lightwave section row address must be set to zero for stand-alone
operation. The column address can be set to any value greater than
the column address of the display. The highest column address that
can be used is 30. A default column address of 20 is used throughout
this manual.
When the HP 70810B is part of a system, the default row address is 3
and the default column address is 20.
Figure
1-2.
Module
Removal/Replacement
70810B Lightwa
HP
e
v
Note
Note
Section
User's
column
3.
Set
the
lightwave
section
HP-MSIB
address
to
Refer to Figure 1-3 for the correct address switch position.
The four-section switch at the top of Figure 1-3 has no eect on
stand-alone operation.
Set
4.
5. Slide
the
the
HP-IB
switch to
lightwave
ON
section
stand-alone
for
the
into
mainframe
operation.
push
,
front panel, and tighten the module latch using the 8 mm hex-ball
driver.
Stand-alone operation does not require an external cable connection
at rear-panel HSWP
Guide
connector.
Getting
20,
rmly
row
on
Started
0.
the
1-5
Figure 1-3.
HP 70810B Address Switch Position for Stand-Alone Operation
ON.
power
to
indicator
the
that
and
on
is
Set the
6.
Verify
7.
ventilation
mainframe LINE
that the
mainframe
fan is
working.
switch
After
8.
section
the
If
power-up
lightwave
Press
a.
the
b.
Press
selected
c. Press the
stand-alone operation of the lightwave section.
9. Refer to Chapter 2 to verify operation of the lightwave section.
During a normal power-on sequence, a self-test routine causes
various
the
70810B
ERR
description
To remove the HP 70810B module
1. Set the instrument LINE switch to OFF
attached to the high-sweep connector on the rear panel, remove it.
lightwave
the
ready
is
lightwave
the
main
the
lightwave
LED
of
for
the
,
section.
4
DISPLA
menu
N
N
N
NEXT
for
4
MENU
remains
displayed
the
appeared, the
have
softkeys
probably
perform
it,
display
the
.
until
operation.
turn
to
test, refer
the
messages
.
on
do
is
the
front
the
not
not
and
.
window
assign
o
key
5
Y
the
N
N
N
N
N
N
N
N
N
softkeys
menu
on
display
N
N
N
N
N
N
N
softkey
section
use
section
display
for
N
N
N
N
NN
NN
N
N
N
N
T
N
INSTR
independent
5
key to display the seven softkeys for
on
LEDs
after
section
error
. If a coaxial cable is
appear
assigned
following
panel
lightwave
If
o.
Chapter
to
lightwave
after
to the
steps:
access
to
section
HP
the
for
9
is
a
Getting Started
1-6
2. Swing down the front door, then use the 8 mm hex-ball driver to
loosen the module latch.
HP
.
70810B
Lightwa
e
v
Section
User's
3.
Slide
the
module
out
of
mainframe
the
Guide
Changing Measurement Parameters with an HP 71400C or HP 71401C
Use the front-panel knob, step keys, or numeric keypad to enter
new measurements settings.For example, press the
NNNNNNNNNNNNNNNN
N
ATTEN
softkey
to change the optical input attenuation. After changing the setting,
pressing the
another function is selected. Pressing the
4
HOLD
5
key disables the keypad, knob, and step keys until
4
5
key twice blanks the
HOLD
right-side softkeys.
Use the
45
(backspace) key to speed your navigation through softkey
menus. When pressed, the previous softkey menu is displayed. Also,
use this key to backspace over numbers entered using the data-entry
keypad.
70810B Lightwa
HP
e
v
Section
User's
Guide
HP 71400C/HP 71401C
Getting
Started
1-7
Caring for Optical Connectors
Warning
Caution
To avoid the possibility of damage to your eyes, verify a disabled
output at the light source before any cleaning, connecting, or
disconnecting of optical system components.
The HP 70810B options include various optical input connector
interfaces. Also available are patch cords that accommodate
additional optical connector systems. The connectors and patch cords
screw on nger-tight to the lightwave section front-panel optical
input tting. An optical cable from the light source attaches to the
connector interface or patch cord.
Both the lightwave section front-panel tting and the source cable
have a protruding ber-optic tip. In the center of this tip is the actual
glass ber. Lightwave measurements demand precision mating of
awless ber ends. Thus the delicate glass ber requires protection
from mechanical damage, ngerprints, and obstructions.
assure
help
following
The
accurate
Exposed
object to
light
ber-optic
touch
important when
and breaking
Never insert
may cause
precautions
measurements
tips
unprotected
an
installing
connections
cleaning
any
damage
that
help
.
easily
are
connector
a
.
tool
can
prevent
tip
into
aect
ber
scratched.
precaution
This
.
interface
optical
an
optical
the
damage
and
allow
not
Do
is
when
and
connector
system.
any
particularly
making
ferrule;
this
Cleaning
Optical
Connectors
Refer to \Cleaning Connections for A
Chapter 3 for optical connector cleaning information.
not
Do
cleaning
Before
alcohol
touch
with
any
and
exposed
an
cleaning
mating
cotton
a
solution.
ber-optic
of
swab
ber-optic
tips
.
tip
clean
,
An oily
.
ngerprint requires
the tips
with isopropyl
Clean more thoroughly with cleaning solution if measurements
reveal a slightly lower than expected power level or an increase in
reections or intensity noise.
Always replace the protector caps on any exposed ber-optic tip.
ccurate Measurements" in
Getting Started
1-8
HP
70810B
Lightwa
e
v
Section
User's
Guide
Reducing Electrostatic Discharge (ESD) Damage
Caution
ESD can damage or destroy electronic components.Work at static-safe
workstations when servicing assemblies consisting of electronic
components.
Figure 1-4 shows an example of a static-safe workstation with
two combinations of ESD protection: conductive table mat with
wrist strap; conductive oor mat with heel strap. Use these two
combinations together. The \Static-Safe Accessories" section provides
lists of accessories.
test
1-4.
and
help
service
following
The
during
Figure
suggestions
instrument
PC Board Assemblies and Electronic Components
Work at a static-safe workstation.
static-shielding
Store
not
Do
or transport
erasers
use
in
to
clean
generate static electricity and remove gold plating. Clean with
lint-free cloth and a solution of 80% electronics-grade isopropyl
alcohol and 20% deionized water
Static-Safe
reduce
ESD
.
containers
connector
edge
.
orkstation
W
damage
contacts
.
can
that
. Erasers
occur
70810B Lightwa
HP
e
v
Section
User's
Guide
Getting
Started
1-9
Test Equipment
Static-Safe Accessories
Before connecting any coaxial cable to an instrument for the rst
time each day, momentarily short together the center and outer
conductors of the cable.
Before touching the center pin of any connector, make sure you are
using a grounded, resistor-isolated, wrist strap.
To prevent buildup of static charge, make sure all instruments are
properly earth-grounded.
Table 1-1 lists static-safe accessories that you can order through any
Hewlett-Packard sales and service oce.
Table 1-1. Static-Safe Accessories
HP Part
Description
Number
9300-0797 Set includes: 3M static control mat 0.6 m21.2 m (2 ft
2
4 ft) and 4.6 cm (15 ft) ground wire. (The wrist-strap
must be
they
9300-0980
wrist-strap
and
ordered
separately
Wrist-strap cord
cord
.)
1.5
are
m
not
(5
included;
ft)
9300-1383
9300-1169
Wrist-strap
adjustable
four
has
connection.
heel-strap
ESD
color
,
black,
links
(reusable
stainless
a
and
12
to
6
steel, without
post-type
mm
7
months).
cord,
1-10
Getting Started
HP
70810B
Lightwa
e
v
Section
User's
Guide
Servicing Your Module Using the HP 71000 System Service Kit
The HP 71000 system service kit (HP part number 71000-60002)
is the general service kit for HP 70000 Series modules. This kit
includes servicing tools required to repair all HP 70000 Series modules
and also a modication procedure for the HP 70001A mainframe.
The modication allows access to HP 70000 Series modules during
bench testing and repair. Refer to the latest version of service note
71000A-1 for a full listing of the HP 71000 system service kit contents.
70810B Lightwa
HP
e
v
Section
User's
Guide
Getting
Started
1-11
Returning the Module for Service
Repackaging a module requires the original shipping containers and
materials or their equivalents. Hewlett-Packard oces can provide
packaging materials identical to the original materials. Refer to
Chapter 10 for the Hewlett-Packard sales and service oce nearest
you.
Caution
Packaging materials not specied can result in instrument damage.
Never use styrene pellets to package electronic instruments. The
pellets do not adequately cushion the instrument, do not prevent all
instrument movement, and can generate static electricity.
To return a module for service
1. Fill out a blue repair card (located at the end of this chapter)
and attach it to the instrument. Send a copy of any noted error
messages or other helpful performance data. If a blue repair card
is
a.
b.
c.
d.
e.
f.
g.
o
T
2.
the
equivalents
acceptable packaging.
available
not
service
of
Type
Description
intermittent
and
Name
Return
Model
Full
List
help
address
number
serial
any
of
prevent
factory
least
include
,
at
required
problem
the
of
returned
of
of
number
returned
returned
during
telephone
number
accessories
damage
packaging materials
best; however
are
, the
the following
whether
and
technical
of
instrument
instrument
with
transit,
. Original
following
information:
is
it
contact
instrument
the
pack
shipping
instructions
constant or
person
instrument
materials
result
in
or
in
1-12
Getting Started
a. Wrap
the instrument
in anti-static
plastic to
reduce
possibility of ESD damage.
b. For instruments that weigh less than 54 kg (120 lb), use a
double-walled, corrugated cardboard carton of 159 kg (350 lb)
test strength. The carton must be both large enough and strong
enough to accommodate the instrument. Allow at least three to
packing
sides
all
four
Surround
c.
material
carton.
is S.D
inches
on
the equipment
protect the
to
If packing foam is not available
.-240 Air Cap
California 94545. Air Cap
inch air bubbles
. Use pink anti-static Air Cap
of
with
module
TM
from Sealed
the instrument
three
and
Air Corporation, Hayward,
is plastic sheeting lled with 1-1/4
for
inches
four
to
prevent
to
movement
, the best alternative
. Wrapping
the instrument several times in this material should provide
sucient protection and also prevent movement in the carton.
3. Seal the carton with strong nylon adhesive tape.
CARE.
.
WITH
70810B
HP
Lightwa
e
v
4.
5.
Mark
Retain
the
copies
carton
of
FRA
shipping
all
GILE,
HANDLE
papers
the
material.
packing
of
Section
in
User's
the
Guide
System Verication
This chapter shows you how to verify basic lightwave section
functions.
What You'll Find in This Chapter
2
Verifying Basic Functions
:::::: ::::::::: ::::::: ::::::::: :::::
page 2-2
70810B Lightwa
HP
e
v
Section
User's
Guide
System
erication
V
2-1
Verifying Basic Functions
Because of specialized and expensive test-equipment requirements,
this chapter does not contain software-supported procedures needed
to verify module specications. This chapter does provide a procedure
that veries the basic functionality of the HP 70810B optical average
power meter, optical to electrical converter, and optical attenuator in
HP 70810B stand-alone mode.
The spectrum analyzer illustrated in Figure 2-1 is an HP 70000
modular spectrum analyzer with a calibrator output of 300 MHz at
0
10 dBm. The calibrator output is used as the modulation source for
the verication test. Any equivalent spectrum analyzer can be used.
The laser and power supply shown in Figure 2-1 may be substituted
with any modulatable laser.
If the lightwave section fails any one of the verication tests, contact
your local Hewlett-Packard service oce. The procedure for returning
and instrument for service is described in \Returning the Module for
Service"
Chapter
in
1
T
o
verify
basic
functionality
1.
2. Check the power-bar display for the HP 70810B in stand-alone
Figure
shown
Connect
mode
Figure 2-2
the
Initial
Figure
2-1.
. The display should be similar to that illustrated in
.
equipment
test
as
Operation
in
Equipment
est
T
2-1.
Setup
2-2
System V
erication
The gure illustrates the optical
as a power-bar graphic and an
does not match Figure 2-2 , press
average power reading displayed
annotated readout. If the display
4
5
on the display controlling the
I-P
HP 70810B and recheck the test setup. If the power bar response is
the
Clean
e
v
.
ber
Section
is
User's
used.
Guide
absent
optical
the
,
low
or
connectors
lightwave
verify
and
section
that
defective
be
may
single-mode
70810B
HP
optical
Lightwa
3.
A
erform
P
verage
the
Display
ower
P
calibration
Figure 2-2.
from
Operation
procedure
an
for
HP
an
70810B
optical
Stand-Alone
in
power
meter
.
intensity
the
Any
300 MHz.
the
optical
power
dierences
which
the
set
and a
Using
4.
the
Compare
5.
meter
between
listed
o
T
6.
spectrum
100
calibrated
the
lightwave
the
the
and
the
Chapter
in
observe the
analyzer
The
MHz.
optical
.
source
HP
power
70810B
optical
measured
5.
detection of
to
analyzer
levels
lightwave
levels
a modulated
a center
should
power
meter
measured
section.
should
be less
frequency of
display a
calibrate
,
by
than that
optical signal,
300 MHz
signal at
The signal represents the uncalibrated modulation power. The
analyzer display should be similar to that illustrated in Figure 2-3.
If it is not, perform an instrument preset for the HP 70810B,
recheck the test setup and instrument settings. If no signal is
the
displayed
probably
o check the operation
7. T
NNNNNNNNNNNNNNNNNNNNN
at
defective
NNNNNNNNNNNNNNNNN
ATTEN Manual
modulation
.
of the optical attenuator
and set the
lightwave
the
frequency
,
optical attenuator to 5 dB
section
, press
.
The signal level displayed on the spectrum analyzer should drop
by approximately
10 dB. (A 1 dB change in the optical attenuator
setting causes a 2 dB change in the signal level displayed on the
spectrum analyzer.) If the spectrum analyzer signal level does not
respond correctly to a change in optical attenuation, the lightwave
section
defective
is
.
is
span
is
of
of
70810B Lightwa
HP
e
v
Section
User's
Guide
System
erication
V
2-3
Figure 2-3. Spectrum Analyzer Display of Modulation Spectrum
2-4
System V
erication
HP
70810B
Lightwa
e
v
Section
User's
Guide
Operating
This chapter describes how to operate a lightwave section that has
been congured for stand-alone operation only.For information
about operating a lightwave signal analyzer system, refer to the
70000 Modular Spectrum Analyzer Operation Manual for HP 70900B
Local-Oscillator-Controlled Modules
What You'll Find in This Chapter
An Overview
Display Front-P
Overview
An
Front-P
Cleaning
anel
Connections
of Operation
anel Keys
Softkeys
of
Rear-P
and
anel
for
:
::
:
:
:
::
::
:
:
:
:
eatures
F
ccurate
A
.
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
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::
:
Measurements
3
HP
3-2
page
:
:
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3-9
page
:
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70810B Lightwa
HP
e
v
Section
User's
Guide
Operating
3-1
An Overview of Operation
In stand-alone conguration for the lightwave section, there are two
modes of operation.
Lightwave mode
enables the optical detector and preamplier,and
calibrates the average power in optical units.
RF signal bypass mode
enables the lightwave section to pass an
RF signal through its RF INPUT and route it directly to the RF
OUTPUT.
An intensity-modulated 1200 nm to 1600 nm (750 nm to 870 nm for
an Option 850) lightwave signal on a single-mode ber can be directly
applied to the optical input. The intensity-modulated optical power
can be detected, as well as the average optical power.
In lightwave mode, the optical input is detected by a high-speed PIN
photodetector. The modulated portion of the input is then amplied
by a microwave traveling-wave amplier and passed to the RF output.
The gain of this amplier overcomes the noise gure of electrical
measurement
excellent
power is
on-screen as
The system
instruments
sensitivity
amplied
power
a
internally
is
standard lightwave
A
an Option
external
addition,
dynamic
850.
reference
built-in
the
.
range
detected
The
.
transimpedance
a
by
.
bar
calibrated
section,
calibration
user
the
over
optical
connected
nm
1300
feature
nm
1200
attenuator
the
to
average
amplier
two
at
and
1600
to
allows
output,
RF
component
and
optical
1550
also
wavelengths
and
nm,
allows
nm wavelength
operation
which
of
is
calibration
yields
optical
displayed
in
nm
850
at
range
awide
over
to
a
in
an
In
.
Note
Calibration
bypass
RF
In
bypassed
lightwave
section.
so
section
This
mode
that
lets
the
,
electrical
an
RF
you
PIN
INPUT
make
photodetector
passed
is
signal
OUTPUT
RF
the
to
electrical
power
and preamplier
directly from
the
of
measurements
are
the
lightwave
directly
from the RF INPUT on the lightwave section.
You may use the instrument preset
4IP5
key on the display front panel
at any time to return the instrument to a power-on state where all
operating parameters are reset.
the
The
lightwave
section
has
been
calibrated
as part
of
manufacturing process and does not require routine calibration by
user. All specications apply after the module temperature
the
has stabilized.
adequate for temperature stabilization.
module recalibrated by Hewlett-P
A warmup period of 30 minutes following turn-on is
We recommend you have the
ackard
at 12-month intervals
.
3-2
Operating
HP
70810B
Lightwa
e
v
Section
User's
Guide
Display Annotation
You will nd display annotation to be helpful when making
measurements from the front panel of the instrument. The display
annotation provides information about the current state of the
lightwave section. Refer to Figure 3-1 for information on the kinds of
display annotation that are available.
70810B Lightwa
HP
e
v
Section
User's
Guide
Figure 3-1.
Display
Annotation
Stand-Alone
for
Operation
Operating
3-3
Optical attenuator
indicates the current optical attenuator
setting in optical power units. Use the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTEN Manual
softkey to change the optical
attenuator setting.
Power meter readout
Mode indicator
Power bar
Zeroing indicator
Refer
softkey
section
the
to
operation.
\An
provides the current average power meter
readout annotated in optical dBm or watts
units. Use the units menu softkeys to change
the display annotation.
indicates whether the lightwave section is
in lightwave or RF bypass mode. Use the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
N
select input
softkey to change modes.
provides a visual display of the average
optical power measured by the power meter.
is displayed while osets in the power meter
are being zeroed in either automatic or
manual zeroing mode. Use the ZERO softkey
function to zero the power meter manually.
information about
Overview
Softkeys"
of
for
3-4
Operating
HP
70810B
Lightwa
e
v
Section
User's
Guide
Display Front-Panel Keys
The display front-panel
4
DISPLAY
5
and
4
MENU
5
keys provide access to
the two dierent types of softkey menus. Pressing either key at any
time automatically selects the menu structure for the respective key.
A third display front-panel key,the
4
USER
5
key, is not implemented for
stand-alone operation.
The
4
DISPLAY
5
key selects the Display Main Menu, which allows access
to all display functions. Refer to the operation manual for the display.
The
4
5
MENU
key selects the softkey function menu for the lightwave
section. When the menu softkey is rst pressed, seven softkeys
appear at the right-hand side of the display screen. These softkeys
perform the most frequently used functions and provide access to the
next level of softkeys.
If no other instruments are installed in the mainframe or display, the
softkey menu for stand-alone operation appears when the mainframe
and display are switched on.
other
If
lightwave
the
lightwave
4
the
via
softkey
the
element
instruments
section
5
Y
menu
must
key
appears
section
DISPLA
stand-alone
in
installed
are
congured
is
rst
After
.
mode
,
and
selected
be
lightwave
the
the
.
the
in
for
section
mainframe
stand-alone
the
with
section
operates
display
or
operation,
N
N
N
N
NN
NN
NN
NN
N
N
N
N
NEXT
been
has
an
as
N
INSTR
and
the
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
softkey
selected,
independent
70810B Lightwa
HP
e
v
Section
User's
Guide
Operating
3-5
An Overview of Softkeys
The softkeys selected by the
lightwave section functions. A softkey is designated by the following
convention:
All softkeys designated by lowercase letters indicate that a sub-level
softkey menu exists beyond that particular softkey. Uppercase letters
indicate that there are no further sub-level softkey menus for that
softkey.
Generally, a softkey that is underlined or displayed in inverse video
indicates that the function is enabled. When an active function is
enabled, it is always displayed in inverse video.
Using the Front Panel to Enter Data
Data values are required for some softkey functions. The entries
may be made using the numeric keypad, the
knob
softkey description
each
otherwise
both
turned.
is
Note
front-panel
under
Unless
determined
knob
the
other display
Two
(instrument
preset conditions
the
. That
mode
instrument
the
NNNNNNNNNNNNNNNNNNNNNNN
softkey
applicable
If
.
noted,
the
by
front-panel
preset) and
of
4
if
,
is
is
is pressed
5
I-P
preset
4
MENU
.
,
the rate
measurement
keys
4
(backspace). The
5
lightwave
the
that
to
5
key allow access to all of the
485
and
495
method
each
of
use
the
in the
\Softkey Descriptions"
the
range
may
of
and
be
of change
that
4
while
display
section
in
mode
the
to
RF
.
front-panel
speed
the
useful
key initiates
5
I-P
current
the
bypass
keys, and the
described
is
section.
knob
which
at
4
are
I-P
5
all
display
display
mode
is
,
4
The
reverse
presses
key
brings
key
5
sequence
are
you
the
of
saved.
through
back
softkeys
that
the
were
menu
structure
pressed. Up
in the
to the
last ten
3-6
Operating
HP
70810B
Lightwa
e
v
Section
User's
Guide
Front-Panel and Rear-Panel Features
Figure 3-2 illustrates front- and rear-panel features of either an
HP 70810B or an HP 70810B Option 850. Specications for the
lightwave section input and output connectors are provided in
Chapter 5.
Front-P
70810B Lightwa
HP
anel LEDs
User's
Section
e
v
Figure 3-2. HP 70810B Front Panel and Rear Panel
Each front-panel
lightwave
section
section.
executing
is
LED
The
indicates
LEDs
self-test.
its
a
ash
condition
and
on
activity
or
when the
o
of
If the ERR (error) LED lights at any time other than during self-test,
there is a problem with the lightwave section. Chapter 9 provides
ERR LED troubleshooting suggestions
If set by software
, the SRQ (service request) LED
.
can indicate certain
conditions or occurrences (for example, an error condition or the
completion of an operation). Self-test veries that the LED will light.
CT
A
The
request)
conditions
(active),
LEDs
.
RMT
indicate
(remote),
normal
HP
LSN
70810B
(listen),
and
activities
,
not
(service
SRQ
Guide
the
lightwave
error
Operating
3-7
Connectors and Latches
RF INPUT
OPTICAL INPUT
RF OUTPUT
Module latch
HSWP IN/OUT
Mainframe/module
The RF INPUT SMA connector presents a 50
nominal input impedance.
The OPTICAL INPUT connector can be one of
several types listed as options under \Options
and Accessories" in Chapter 10.
The RF OUTPUT SMA connector provides a
50 nominal output impedance.
The module latch secures the lightwave
section in a mainframe. An 8 mm hex-ball
driver (shipped with the mainframe) ts the
lightwave section hex-nut latch.
Refer to Chapter 1 for lightwave section
installation and removal instructions.
When the lightwave section is congured in a
lightwave signal analyzer system the HSWP
synchronizes
signal
system
the
while
selected
.
master
local
frequency
system
high-sweep
The
oscillator
span.
operation
swept
is
with
signal
through
interconnect
HP-IB
buses
mainframe
the
the
and
connects
50-pin
The
HP-MSIB
lightwave
the
kHz
40
connector
communication
section to
power supply
accesses
.
is
the
high
a
and
3-8
Operating
HP
70810B
Lightwa
e
v
Section
User's
Guide
Cleaning Connections for Accurate Measurements
Accurate measurements require clean connections. Use the following
guidelines to achieve the best possible performance when making
measurements on a ber-optic system:
Keep connectors covered when not in use.
Use dry connections whenever possible.
Use the cleaning methods described in this section.
Use care in handling all ber-optic connectors.
If an extremely good match is a concern, characterize the connector
interfaces using both dry and wet connections. The results will
show you the level of return loss performance you can expect from
the connectors, dry and wet.
When physical contact is not made at the ber interface, use a
reliable or recommended index-matching compound to achieve
the best possible return loss, the lowest reection, and the lowest
.
of
to
loss
small
the
ensure
and
size
connections
good
gaps
air
removal
used
cores
of
damaged
,
index-matching
of
.
oor
P
ber
in
insertion
Because
be used
core misalignment,
improper use
optic
ber
connections
contamination,
,
ends
compounds
cables
result
.
care must
,
from
and
Note
To clean a dry connector
Index-Matching
strongly
HP
applied
to
compounds
attach
connection
dry
,
possible
a
Compounds
recommends
lightwave
the
required,
are
HMS-10/HP
an
and
that
section's
clean
make
index-matching
OPTICAL
thoroughly
adapter
connections
wet
cable
compounds
INPUT
every
after
the
to
the
at
not
connector
connection.
instrument
end
free
of
.
be
If
with
the
these
If
cable.
Use dry connections (without index-matching compounds). Dry
connectors are easier to clean and to keep clean. Dry connections can
be used with physically contacting connectors such as HMS-10/HP,
R
Diamond
40
improve
1. Apply isopropyl
,ST, DIN, and PC connectors. If a dry connection has
better
or
dB
return
loss
performance
.
alcohol to a clean lint-free swab or lens paper
Cotton swabs can be used
making a
,
connection
wet
will
as long as no cotton bers remain on
probably
not
.
the ber end after cleaning.
2. Clean the ber end with the swab or lens paper. Move the swab or
.
lens
paper
back
forth across
and
the
ber
end
several
times
70810B Lightwa
HP
e
v
Section
User's
Guide
Some
help
amount
remove
wiping
of
particles
or mild
when
scrubbing
application
the
of
of alcohol
ber
alone
can
end
will
Operating
not
3-9
To clean a wet connector
remove them. This technique can remove or displace particles
smaller than one micron.
3. Allow the connector to dry for about a minute.Or, use compressed
air to dry it immediately.
Using compressed air lessens the chance of deposits remaining
on the ber end. Do not shake or tip the compressed air can,
because this releases particles in the can into the air. Direct the
compressed air horizontally across the ber end.
4. As soon as the connector is dry, connect or cover it for later use.
Use of an index-matching compound cannot x a damaged connector.
Do not use gels in physically contacting connectors.
1. Use a clean lens paper to wipe any compound from the ber end.
2. Use a clean lens paper to clean the ferrules and other mating
surfaces of the connector.
compressed
clean
and
Use isopropyl
3.
to clean
air
Contact
recommended
alcohol, clean
the ferrule
and other
the manufacturer
solvents and
lint-free swabs
mating
of the
index-matching
cleaning procedures
,
connector
compound
.
surfaces
.
for
the
T
o
apply
arning
W
index-matching
Note
solvent
the
of
components
minute
for
it.
or
Some
swab
use
solvents
.
the
Move
.
compressed
Many
before
leave
can
Clean
4.
swab
Allow
5.
air
solvents
using
residues
ber
the
across
connector
the
it
dry
to
toxic.
are
solvent
the
on
with
end
ber
the
immediately
the
Read
when
or
connectors
alcohol
end.
for
dry
to
.
directions
disposing
damage
or
a
and
a
about
lint-free
Using compressed air lessens the chance of deposits remaining on
the ber end. Do not shake or tip the compressed air can, because
this releases particles in the can into the air. Direct the compressed
air horizontally across the ber end.
6. As soon as the connector is dry, connect or cover it for later use.
compound
1. Apply index-matching compound to the ber ends using a clean
wooden toothpick, the wooden end
little index-matching compound as possible
of a swab
.
Do not apply compound to the connector's sleeve
, or a syringe
.
.Useas
3-10
Operating
Immediately
2.
make
the
cable
connection.
HP
70810B
Lightwa
e
v
Section
User's
Guide
Programming
This chapter describes how to operate a lightwave section by remote
computer control.
What You'll Find in This Chapter
4
Getting Set Up for Remote Operation
::::: ::::::::: ::::::: ::
Communicating with the Lightwave Section
:
:
:
:
:
:
Transferring
Monitoring
Data
System
Computer
the
to
Operation
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:::::: ::::::::: :
::
::
::
::
:
:
:
:
:
:
:
:
::
::
::
::
:
page 4-2
page 4-3
4-6
page
:
:
:
:
:
:
4-8
page
:
:
:
:
:
:
:
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
4-1
Getting Set Up for Remote Operation
To connect your equipment for remote operation of the lightwave
section:
1. Connect the computer, the mainframe containing the lightwave
section, and other peripherals with HP-IB cables.
2. After the HP-IB cables are installed, reset all instruments
connected to the bus. If you are not sure how to reset a device,
switch its line power o, then on, to reset it.
3. Check the HP-IB address of the lightwave section on the address
map. The lightwave section must be congured (in row 0) so that it
is congured for stand-alone operation.
Note
To view the address map, press the
front-panel, then press the
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Address Map
4
DISPLAY
5
key on the display
softkey. Turn the knob
on the front panel of the display until the lightwave section
appears in the address map.
HP-IB
for
The lightwave
error-reporting
lightwave
The
column
the
than
observe
o
T
4.
N
N
N
N
NN
N
NEXT
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
INSTR
section must
capabilities
section
column
address
lightwave
the
N
N
N
N
NN
softkey
.
of
.
be located
default
The
address
display
the
section
in row
must
.
operation
0
column
also
address
have
the
on
a
display
access
column 20.
is
higher
press
,
and
value
the
4-2
Programming
HP
70810B
Lightwa
e
v
Section
User's
Guide
Communicating with the Lightwave Section
This section develops some fundamental techniques for controlling
the lightwave section and obtaining reliable measurement results.
The lightwave section is remotely controlled with commands that
correspond in general to front-panel softkey functions.
It is important to understand how messages are communicated to
the lightwave section; therefore, enter and output statements and
command syntax discussed in this chapter should be understood
before proceeding. HP BASIC is used for all examples in this manual.
Executing Remote Commands
The computer communicates with the lightwave section on the
Hewlett-Packard Interface Bus (HP-IB), using HP BASIC
ENTER
An
statements.
OUTPUT
statement tells the computer to send a message to the
lightwave section. For example, executing the statement below sets
dB:
3
the
optical
attenuator
to
OUTPUT
and
70810B Lightwa
HP
e
v
Section
User's
An
ENTER
statement
used
conjunction
in
with
lightwave
a
query returns information to the computer.To return the optical
attenuator value to the computer, rst form a query by adding a
question mark (?) to the command:
Guide
section
Programming
4-3
Next, the
ENTER
statement is used to assign the returned value to a
variable in the computer:
The value of the optical attenuator above is placed in the variable
named \Atten". The variable may be printed, stored, or used for
other computer functions.
Syntax Requirements
All of the program examples in this manual show recommended
command syntax. All lightwave section commands must be
constructed according to specic syntactical rules which are outlined
Chapter
in
commands
That
8.
alphabetical
in
chapter
lists
order
.
all
of the
remote lightwave
section
T
to
Refer
lightwave
valid
all
Local
and
Whenever
front-panel
executing
or
key
softkeys
the
of
front-panel
The
under the
When the
Chapter
in
8-2
able
remote
Control
section
disabled
are
ASIC
B
HP
Remote
lightwave
the
softkeys
section
the
.
indicators on
following conditions
lightwave section
a complete
for
8
commands
remotely
is
blanked.
and
statement
the HP
70810B
when the
is addressed,
alphabetical listing
.
addressed,
Pressing
LOCAL
reactivates
Lightwave
HP-IB interface
the RMT
indicator
display
the
4
the
Section
used:
is
LOCAL
operation
lights
When the lightwave section receives information, the LSN indicator
lights.
When the lightwave section sends information, the TLK indicator
lights.
When
occurred
has
measurement
a
and the
event
(for
lightwave
example
section
, end
requesting
is
computer
sweep)
the
of
attention, the SRQ indicator lights (provided that the
service-request mask
is set to allow SRQ on end-of-sweep).
of
5
light
.
4-4
Programming
HP
70810B
Lightwa
e
v
Section
User's
Guide
Initial Program Considerations
Programs should begin with a series of HP BASIC statements and
lightwave section commands that form a good starting point for
lightwave measurements. The following example shows how to
initialize the lightwave section.
10 ASSIGN @Lws to 720
20 CLEAR @Lws
30 OUTPUT @Lws;"LTWAVE ON;IP;"
The
ASSIGN
name to an I/O device. In the example above, the I/O path name is
@Lws
. It is assigned to the device at interface select code 7 (the HP-IB
interface), and at HP-IB address 20.
statement creates an I/O path name and assigns that
Note
All program examples in this manual assume that the lightwave
section is addressed at HP-IB address 20.
Using the
the
important,
is
Many
assume
CLEAR
output
that
so
devices
only
address
the
of
that
an
is
buer
is
it
on
instrument
one
ASSIGN
the
of
using
examples
the
HP B
and
,
ready
bus
the
statement in a program makes it easier to change
lightwave
ASSIGN
@Lws
in
I/O
section.
can
this
path
ASIC statement
command parser
the
for operation.
so
or in
other instruments
that
singly
also
chapter
name
that
This
unison.
applications
In
improve
in
and
,
already
is
clears
of
command
is
It
program
the
the
specied
the
often
on
where
language
assigned.
input
be
may
desirable
the
speed
performance
reference
the
,
buer
instrument,
to
used
clear
to
not
are
bus
.
clear
aected.
used.
only
clear
o
T
all
clear
o
T
instrument
the
,
IP
the lightwave
the
devices
preset
section
lightwave
select
at
command,
the
for
section,
code
current
CLEAR
CLEAR
7,
presets
mode
@Lws
must
7
of
all
operation,
of
should
the
be
used.
be
parameters
and
of
provides
a good starting point for all measurement processes. ExecutingIPis
actually the same as executing a number of commands that set the
lightwave section to a known state.IPdoes not change the mode of
operation (lightwave optical or RF bypass).
,
70810B Lightwa
HP
e
v
Note
Section
User's
Guide
Turning
.
mode
the
power
on
presets
instrument
the
the lightwave
to
optical
Programming
4-5
Transferring Data to the Computer
The lightwave section returns information as decimal values in
fundamental units shown in Table 4-1. The lightwave section also
applies these units to data received from the computer which do not
explicitly specify units.
Table 4-1. Units for Returned Data
Requesting
and
Receiving
indicated
As
returned
command
can
in
is
either
information,
certain
on
the
to
Refer
manual
for
Data
transfer
Data
lightwave
a
conjunction
computer
.
Measured
Fundamental Unit
Data
Amplitude dBm, watt
Power dBm, watt
Ratio dB
Responsivity volt/watt
able 4-1
in T
several dierent
select the
to
used
single unit
or
a
be set
can
it
specify
measurement
description
information.
more
simplicity
varies
section
with
in
query
a lightwave
, power
settings
of
.An
and amplitude
units.
desired unit.
to be
to automatically
.
UNITS
A
the
,
HP B
section query
The A
but
ASIC
information
UNITS (amplitude
The
all
for
used
select
command
cases
all
in
ENTER
statement
returns information
UNITS
A
power
the
Chapter
in
initiated
is
may
units)
command
amplitude
and
based
,
units
8
with
in
be
this
of
to the
4-6
Programming
Form a query by adding a question mark (?) at the end of an
lightwave section command. The syntax charts in Chapter 8 show
which commands can be used in queries.
In the following example, the optical attenuator value is returned to
computer:
the
User's
Section
e
v
Lightwa
70810B
HP
Guide
Use the
the computer:
ENTER
statement to assign the returned value to a variable in
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
4-7
Monitoring System Operation
The programming techniques discussed so far describe communication
between the lightwave section and the computer, where the sequence
of all data transfer is controlled by a computer program. This section
describes how the lightwave section can interrupt computer operation
when the lightwave section has attained a particular state.
The interrupting process is called a service request. Service
requests have many applications. They facilitate economical use of
computer-processing time when the lightwave section is part of a
large measurement system. For example, after the computer initiates
a lightwave section measurement, the computer can make calculations
or control other devices via HP-IB while the lightwave section is
measuring. When the lightwave section is through, it signals the
computer with a service request. The computer's service-request
subprogram then determines what the computer will do next. Service
requests can also be used to report lightwave section errors.
Interrupt
Process
interrupt
The
attention
computer
the
and
This
the
by
must
computer
user-specied
a
call
subroutine
service
subroutine
service
(since
subroutine(s)
that more
and each
steps are
than
instrument
summarized
1. Computer
process
setting
be
is
request.
which
there
will
one
begins when
the HP-IB
programmed
programmed
determine
must
Then,
determines
may
called
be
instrument
may
below
monitors HP-IB
the lightwave
service-request line
respond to
to
interrupt normal
to
subroutine
when
which
be
may
it
a
why
than
more
be
respond
to
may
more
have
.
service
the
instrument(s)
necessary
particular
possible
one
the
to
request
one
than
request
section \requests"
(SRQ) true
this event.
program execution
to
call
request
HP-IB
on
another
service
instrument
cause).
indicated
service
event
line
event(s).
simultaneously
report.
to
(SRQ).
. The
Typically
occurs
caused
requested
Finally
Note
These
2. Lightwave section requests service by setting the SRQ line true.
3. Computer branches to routine that determines the instrument(s)
that caused the SRQ.
4. Computer branches to routine that determines why a particular
instrument
Computer
5.
particular
requesting
is
branches
to
instrument.
service
routine
.
to
process
specic
a
event
in a
Some of the routines above may be omitted, if only one instrument
a particular instrument
has been instructed to use the SRQ line
,orif
has been instructed to use the SRQ line for only one event.
,
.
a
,
,
4-8
Programming
Several system-level statements are required to make the computer
responsive to service requests. The HP BASIC statement, ENABLE
INTR (enable interrupt), tells the computer to monitor the
e
v
Section
species
request
one
User's
service-request
computer
.
an
if
the
more
If
instrument
where
occurs
or
line
than
The
.
program
one
cause
can
on-interrupt
branch
will
instrument
service
a
statement,
when
cause
could
request
70810B
HP
INTR,
ON
service
a
service request,
the
more than
for
Lightwa
Guide
reason, the serial-poll statement, SPOLL, is used. The serial-poll
statement is always required to clear the service request being
generated by the instrument.
Lightwave Section Status Byte
The lightwave-section status byte indicates the status or occurrence
of certain lightwave section functions. The status byte contains eight
bits, numbered 0|7 with bit 0 being the least signicant bit.
Bits 0, 1, 2, 3, 4, 5, and 7 represent specic conditions or events.
These bits are referred to as condition bits and event bits. Condition
bits reect a condition in the lightwave section which may be present
or absent at any given moment. Event bits reect the occurrence of a
transition or event within the lightwave section.
Bit 6 is set by the lightwave section to indicate whether or not it is
requesting service.
When the lightwave section is instructed not to use the service
request line on HP-IB, the status bits always reect the current
condition of the lightwave section. In this situation, the
the
exact
not
status
instant
reliable
byte
when
should
a
of
not
transition
service
requests
used. Event
be
the lightwave
in
are
bits are
section and
disabled.
event bits
only true
as such
in
at the
are
lightwave
When
for
current
generated.
are
section
STB?
system-level
byte
the
The
the
more
or
one
condition
Then,
(by the
until
HP
held true
command, or
statement) is
to once
lightwave
again reect
section.
Service-Request
The service-request mode is enabled and controlled by the
request-service-condition command, RQS. It denes a service-request
mask that species which of the status-byte bits may generate a
service request.
the following
In
COMMAND-COMPLETE
OUTPUT @Lws;"RQS 48;"
OUTPUT @Lws;"RQS ";DVAL("00110000",2)
request
by
ASIC
B
the
requests
the
request
the
status
within
section
conditions
lightwave
the
of
bits
the
status
the
ASIC
B
an
until
instructed
is
the
,
events
or
section
generating
byte
HP-IB
are
read
is
system-level
DEVICE
which
SPOLL
received. These
the
current
conditions
generate
to
status
until
out
CLEAR
actions
of
service
reect
bits
service
a
service
the
lightwave
the
statement),
(HP
clear
events
and
Mask
ERROR-PRESENT
5
and
the
4)
for
service
requests:
example
species
RQS
,
states (bits
Selects bits 5 and 4 (32+16) to enable service re-
quest mode for ERROR-PRESENT and COMMAND-
COMPLETE.
Also selects bits
5 and 4 as above
, but is somewhat
easier to read.
is
CLEAR
and
70810B Lightwa
HP
e
v
Section
User's
Once RQS is executed, the lightwave section requests service by
setting
the
SRQ
line
true
when
the desired
conditions
Guide
events
or
Programming
occur
.
4-9
Table 4-2. Lightwave Section Status Byte
Bit
Number
Equivalent
7 128 OUT OF RANGE Optical power is out of range for
6 64 RQS Set when service request is being
5 32 ERROR-PRESENT Set when error register contains an
4 16 COMMAND-COMPLETE Set at completion of command
3 8 ZEROING Optical power meter is executing its
2 4 Not Used
1 2 MESSA
0 1 Not Used
Service-Request
Decimal
Examples
Lightwave Section
State
GE
following
The
errors
is
in
interrupted
program uses
the lightwave
and
Description Bit
optical average power meter (too
low or too high).
generated.
error.
execution.
zeroing function.
displayed.
Set
section.
description
a
when
service
messages
an
If
the
of
are
requests
error
error
to
occurs
is
monitor
computer
,
printed.
Type
event
|
condition
event
condition
condition
measurement
operation
the
This
HP-IB
10
20
/Insts/
COM
ASSIGN
@Lws
Example.
and
is
@Lws
720
TO
returns
on
30 CLEAR @Lws
40 OUTPUT @Lws;"IP;SNGLS;TS;"
50 ON INTR 7 CALL Lws_error
60 ENABLE INTR 7;2
70
OUTPUT
@Lws;"RQS
32;"
A measurement program would normally be inserted at this point in
program.
an
error
.
only
service
instrument
one
program
description.
enables
ERROR-PRESENT
an
assumes
It
that
Sends unrecognized commands to lightwave section.
Enable computer interrupts for SRQ on interface
#7.
(IFC)
code
select
request
4-10
Programming
HP
70810B
Lightwa
e
v
Section
User's
Guide
80 END
90 SUB Lws_error
100 COM /Insts/ @Lws
110 DIM Errs$(1:6)[64]
120 INTEGER Status_byte
130 Status_byte=SPOLL(@Lws)
140 IF (BIT(Status_byte,5)) THEN
150 OUTPUT @Lws;"XERR?;"
160 ENTER @Lws USING "%,K";Errs$(*)
170 PRINT "Lightwave Section has reported
the following error(s):"
180 PRINT USING "K,/";Errs$(*)
You would normally take action at this point in program to
determine which errors had occurred and x the problem, or halt the
measurement.
IF
190
200
210
END
ENABLE
SUBEND
INTR
7
This will clear the SRQ on HP-IB.
Verify the lightwave section has errors to
report.
Ask lightwave section for extended error
list.
Read error list from lightwave section.
eenable
R
SRQ
interrupts
.
Monitoring System
Operation
The STB
byte
the
of
conducting
status-byte
without
command
time
any
at
status
a
is
Using
Executing
.
to
byte
serial
updated
may
the
poll
Service
used
be
computer
the
of
reect
to
STB?
status
Requests
monitor
to
returns
Executing STB
.
. When
byte
current
lightwave
value
the
the decimal
is
STB
section
status
the
of
equivalent
similar
is
to
executed,
conditions.
the
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
4-11
4-12
Programming
HP
70810B
Lightwa
e
v
Section
User's
Guide
Specications and Characteristics
This chapter contains the module specications for the HP 70810B
and HP 70810B Option 850 lightwave sections.
What You'll Find in This Chapter
5
Conguration Modes
:::::::::::::::::::::::::::::::::::::::::
HP 70810B Module Specications
Module
70810B
HP
Module
This
related
Input
information
specications
specications
user
should
understand
Specications
Option
and
850
Output
and
organized
is
characteristics
and
characteristics
the
describe
Characteristics
distinction
warranted
temperature
continuous
of
hour
noted.
Unless otherwise noted, corrected limits are given
when a specication range is improved with
error-correction routines.
Characteristics
provide useful, but non-warranted, functional and
performance
italics
in
is not
in
warranted
a
::::::: ::::::::: :::::: ::::::
Specications
into two
together
range
information.
text
the
:
:
:
:
:
:
:
:
categories:
in
ables
.T
same
the
,in
between
the
performance
0
of
+55
to
C
operation,
characteristic
A
you
alert
to
specication.
::
::
:
:
:
:
:
:
:
:
:
::
::
::
:
:
:
:
:
:
measurement-
chapter
this
format.
terms:
the
over
after
C
that
otherwise
parameter
the
unless
page 5-2
page 5-3
page 5-6
page 5-10
list
The
one
appears
70810B Lightwa
HP
e
v
Section
User's
Guide
Specications
Characteristics
and
5-1
Conguration Modes
The HP 70810B and HP 70810B Option 850 lightwave sections can
be congured for operation in two modes: a lightwave module can
operate either as part of an integrated measurement system (a
lightwave signal analyzer) or operate independently in a stand-alone
conguration.
A lightwave signal analyzer consists of an electrical spectrum analyzer
and an HP 70810B lightwave section. The lightwave section is mated
with and calibrated to the RF section of the spectrum analyzer.
The HP 71400C lightwave signal analyzer includes the HP 71210C
microwave spectrum analyzer. The HP 71401C lightwave signal
analyzer includes the HP 71100C RF spectrum analyzer (with options
002 and 004).
When a HP 70810B lightwave section is congured as part of an
HP 71400C or HP 71401C lightwave signal analyzer, refer to the
specication reference chapter in the
HP 70000 Modular Spectrum
Analyzer Installation and Verication Manual for HP 70900B
Local-Oscillator
characteristics
and
stand-alone mode
a
be used
signal analyzer
section of
when
the
system
spectrum
Controlled
provided
operation.
of
lightwave
and
analyzer
Modules
this
in
section
not
has
.
chapter
These
is
been
.
module
The
module
congured
calibrated
specications
directly
apply
specications
part
as
with
of
a
the
the
to
must
lightwave
RF
also
Note
special
a
70810B
HP
mating
71210C
HP
provides
It
system.
(module
user
any
panel
rear
Option
calibration
and
system,
system
the
calibration
This
corrections)
calibration.
both
of
(system
020
of
with
or
performance
is
the
of
Option
HP
the
adjustment
HP
the
HP
the
addition
in
lightwave
020
70810B
71810B
70904A of
of
to
module
denoted
is
the
and
calibration)
and
an
HP
HP
with the
HP 71400C
an
standard factory
is
and
,
labels
by
electrical
RF
is
70908A
71100C
or HP
of
system.
71401C
calibrations
independent
the
axed
to
section
(HP
an
of
70908A or HP 70904A). These labels indicate, by serial number, which
modules were mated for calibration.
When the HP 70810B lightwave section is used with an RF section
other than the one it was mated and calibrated with, the system
will
not
provide the specied system frequency response. Module
corrected
specications
will
then
govern
system
performance
.
Specications and
5-2
Characteristics
HP
70810B
Lightwa
e
v
Section
User's
Guide
HP 70810B Module Specications
This section lists HP 70810B lightwave section measurement-related
specications and characteristics. These specications and
characteristics apply to HP 70810B stand-alone operation or to
systems which include an HP 70810B that has not been mated and
calibrated with the RF section installed in the system.
All amplitude specications are in optical dB unless noted otherwise.
70810B Lightwa
HP
e
v
Section
User's
Guide
Specications
Characteristics
and
5-3
Table 5-1. HP 70810B Specications and Characteristics (1 of 2)
Wavelength Range
(characteristic) 1200 nm to 1600 nm
Frequency Range
100 kHz to 22 GHz
(demodulated signal)
Average Power Accuracy Factory-Calibrated User-Calibrated
(at 1300 and 1550 nm) (by external power meter)
6
0.65 dB65nW
6
connector variation
*
6
0.05 dB65nW
6
power meter accuracy
Responsivity
(characteristic)
The responsivity is given for each instrument and is
accurate to620%
Nominal
Noise
V
Equivalent
ower
P
V/watt
1200
Frequency
Noise
Equivalent
Power
MHz
100
at
alue
p
dBm/
55
100
1
10
100
8 GHz
16
kHz
MHz
MHz
MHz
GHz
to
10
to
100
to
to
to 16
to
22
1
8
MHz
MHz
MHz
GHz
GHz
GHz
0
dBm/
61
0
dBm/
66
0
dBm/
70
0
dBm/
68
0
dBm/
64
0
p
p
p
p
p
H
H
H
H
Hz
H
z
z
z
z
z
y
Specications and
5-4
Frequency
Relative
to 100
Response
MHz
Frequency
100 kHz to 2.9 GHz
2.9 GHz to 22 GHz
Corrected
6
2.0 dB
6
5.0 dB
z
x
x
(characteristic) Uncorrected response rollo is<25 dBx100 kHz to 22 GHz
ower
Optical
ower
P
Safe
vary with such factors as connector type and quality
damage, and wear
,
Maximum
Input
*
Connector losses
cleanliness, temperature
y
Applies to any wavelength when the average power readout is set to match the
verage
A
+15
Power
dBm
.
Modulated
+15
P
dBm
, connector
reading of an external calibrated optical power meter. Does not include VSWR losses.
z
Specications achieved by applying module responsivity and/or frequency-response
units
.
.
User's
Section
e
v
Lightwa
70810B
HP
correction
x
Amplitude
factors
stored
measurement
Characteristics
in
the
is
70810B
HP
electrical
in
memory
dB
Guide
Table 5-1. HP 70810B Specications and Characteristics (2 of 2)
Harmonic Distortion
Output
0
10 dBm 43 dB*below fundamental
Optical Input Return Loss
with HMS-10/HP connector,
0 dB input attenuation
Electrical Input Flatness
Corrected
y
(characteristic)
Electrical Output Return
Loss
(characteristic)
Insertion
Bypass
Loss
Mode
z
All internal reectances
(specication).
**
0
40 dB and total return loss35 dB
Frequency Amplitude Error
100 kHz to 6 GHz 1.4 dB
6 GHz to 12 GHz 1.6 dB
12 GHz to 16 GHz 2.0 dB
16 GHz to 22 GHz 2.2 dB
Frequency Return Loss
GHz
6
to
kHz
100
GHz
12
to
GHz
6
GHz
16
GHz
to
to
22
GHz
12 GHz
16
Frequency
GHz
to 6
kHz
100
GHz
12
to
GHz
6
GHz
16
to
GHz
12
GHz
22
to
GHz
16
12.0
10.5
dB
8.5
dB
7.5
Insertion
dB
2.5
dB
3.7
dB
4.9
dB
5.2
dB
dB
*
*
*
*
*
*
*
*
Loss
*
*
*
*
70810B Lightwa
HP
Input Connectors Single-Mode Fiber Connectors
(Option-dependent) Diamond HMS-10/HP, FC/PC, ST, Biconic,DIN
*
Amplitude measurement is in electrical dB units.
**
27
y
This
with
dB
When
specication
the
is
optical
a lightwave
for serial
input attenuation
installed
section
is
prex
5
3237A
(characteristic)
dB
measurement
a
in
and
above
value to the related atness specications for the system. A
doubles
z
the amount of amplitude-error that must be added to the system specications
When a lightwave section is installed in
a measurement system, add the insertion-loss
Serial
.
system,
dding a second lightwave section
prex
add
value to the related absolute-amplitude specications for the system. A
lightwave
section doubles the amount of insertion loss that must be added to the system
3242A
the
dding a second
and
amplitude-error
specications.
Characteristics
e
v
Section
User's
Guide
Specications
and
below:
.
5-5
HP 70810B Option 850 Module Specications
This section lists HP 70810B Option 850 lightwave section
characteristics and measurement-related specications. These
specications and characteristics apply to HP 70810B stand-alone
operation or to systems which include an HP 70810B that has not
been mated and calibrated with the RF section installed in the system.
All amplitude specications are in optical dB unless noted otherwise.
Specications and
5-6
Characteristics
HP
70810B
Lightwa
e
v
Section
User's
Guide
Table 5-2.
HP 70810B Option 850 Specications and Characteristics (1 of 2)
Wavelength Range
750 nm to 870 nm
(characteristic)
Frequency Range
100 kHz to 22 GHz
(demodulated signal)
Average Power Accuracy Factory-Calibrated User-Calibrated
(At 850 nm) (By external power meter)
6
0.65 dB65nW
6
connector variation
*
6
0.05 dB65nW
6
power meter accuracy
Responsivity
(characteristic)
The responsivity is given for each instrument and is accurate
to620%
Nominal
Noise
V
Equivalent
ower
P
V/watt
500
Frequency
Noise
Equivalent
P
MHz
100
at
alue
p
dBm/
51
100
10
100
16
1
8
kHz
MHz
MHz
MHz
GHz
GHz
to
to
to
to
to
10
100
to 8
16
22
1
MHz
MHz
MHz
GHz
GHz
GHz
0
dBm/
57
0
dBm/
62
0
dBm/
66
0
dBm/
64
0
60 dBm/
0
p
p
p
p
p
H
H
H
H
H
H
z
z
z
z
z
z
y
ower
70810B Lightwa
HP
Frequency
Relative
to 100
Response
MHz
Frequency
100 kHz to 2.9 GHz
2.9 GHz to 22 GHz
Corrected
6
2.0 dB
6
5.0 dB
z
x
x
(characteristic) Uncorrected response rollo is<25 dBx100 kHz to 22 GHz
*
Connector
cleanliness
y
Applies to any wavelength when the average power readout is set to match the
losses
temperature
,
vary
with
damage
,
such
,
factors
and
of an external calibrated optical power meter
z
Specications achieved by applying module responsivity and/or frequency-response
as connector
wear.
. Does not include VSWR losses
correction factors stored in the HP 70810B memory
x
Amplitude measurement is in electrical dB units
Guide
User's
Section
e
v
type
.
.
quality
and
Specications
connector
,
.
Characteristics
and
reading
5-7
Table 5-2.
HP 70810B Option 850 Specications and Characteristics (2 of 2)
Maximum Safe Optical Average Power Modulated Power
Input Power
+15 dBm +15 dBm
Harmonic Distortion
Output
0
10 dBm 43 dB*below fundamental
Optical Input Return Loss
(characteristic)
with HMS-10/HP connector
>
27 dB with optical input attenuation5dB
Electrical Input Flatness
Corrected
y
(characteristic)
Electrical
Output
Return
Loss
(characteristic)
Bypass
z
Loss
Mode
Insertion
Frequency Amplitude Error
100 kHz to 6 GHz 1.4 dB
6 GHz to 12 GHz 1.6 dB
2.2
Return
12.0
10.5
8.5
7.5
2.5
dB
dB
dB
dB
dB
dB
dB
GHz
12
GHz
16
Frequency
100 kHz
GHz
6
GHz
12
GHz
16
Frequency
kHz
100
GHz 2.0
to 16
GHz
22
to
GHz
6
to
GHz
12
to
GHz
16
to
GHz
22
to
GHz
6
to
Insertion
6 GHz to 12 GHz 3.7 dB
12 GHz to 16 GHz 4.9 dB
16 GHz to 22 GHz 5.2 dB
*
*
*
*
Loss
*
*
*
*
Loss
*
*
*
*
Input Connectors Single-Mode Fiber
(Option-dependent) Diamond
*
y
value to the related atness specications for the system. A
doubles the amount of
z
value to the related absolute-amplitude specications for the system. Adding a second
lightwave section doubles the amount of insertion loss that must be added to the system
specications
Specications and
5-8
Connectors
FC/PC,
,
Amplitude measurement is in
HMS-10/HP
electrical dB units
.
When a lightwave section is installed in a measurement system,
dding a
amplitude-error that must be added to the system specications
Biconic,
,
ST
add the amplitude-error
second lightwave section
DIN
.
When a lightwave section is installed in a measurement system, add the insertion-loss
.
Section
e
v
Lightwa
70810B
Characteristics
HP
User's
Guide
Table 5-3.
HP 70810B and HP 70810B Option 850
General Specications and Characteristics
Temperature Operation Storage
0Cto+55C
HP 70810B Weight
(characteristic) 1.75 kg (3.9 lb)
HP 70810B Dimensions
Standard 1/8-width module
0
40C to +75C
70810B Lightwa
HP
e
v
Section
User's
Guide
Specications
Characteristics
and
5-9
Module Input and Output Characteristics
This section covers the input and output specications and
characteristics of the HP 70810B and HP 70810B Option 850 lightwave
section modules. The data in this section is a characteristic unless
identied as a specication in Table 5-1 or Table 5-2 .
Lightwave Input
RF Input
Output
RF
HSWP
In/Out
HP 70810B wavelength range
:::::: ::::::::: ::::
HP 70810B Option 850 wavelength range
Frequency range (demodulated signal)
Maximum input average optical power
Input ber size
Frequency Range
:::::: ::::::::: :::::: ::::::::: ::::::: ::::
:::::::::::::::::::::::::::::::::::::
VSWR
0 GHz to 6 GHz
6 GHz to 12 GHz
12 GHz to 22 GHz
actual
The
RF
the
actual
The
power
analyzer
input
section
safe
the
of
.
Frequency
Insertion
Type
Line
Sweep
condition
Maximum
Maximum
RF section
Range
Loss
:
:
Delay
Current
:::::: ::::::::: :::::: ::::::::: ::::::: ::::::::: ::<
::::::: :::::::: ::::::: ::::::::: ::::::: :::::::::<
::::::::::::::::::::::::::::::::::::::::::::::<
limited
is
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
is
the
in
limited
installed
:
:
:
:
:
:
:
::
:
:
:
:
:
:
:
:
:
::
::
:
:
:
::
::
:
:
:
:
:
:
:
:
:
:
:
frequency
is
that
input
:
:
:
:
:
:
::
::
:
:
:
:
:
:
:
:
:
Draw
range
installed
power
that is
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:::::::::
:::::::::::
:::::::::::::::::::::
the
by
the
:
:
:
:
::
:
:
::
the
:
:
::
:
s
::
:
:
:
:
low
from
signal
maximum
lightwave
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
=
HSWP
:
:
:
:
:
:
lightwave
by
in
:
:
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
200
::
::
:
1200 nm to 1600 nm
750 nm to 870 nm
100 kHz to 22 GHz
+15 dBm
9 micron core
0 Hz to 22 GHz
1.3
1.5
1.9
frequency
analyzer
safe
range
input
of
.
signal
GHz
22
to
Hz
0
:
:
:
:
:
dB
5.2
<
:
:
:
::
:
:
:
:
:
:
:
collector)
(open
TTL
sweep
to
ready
not
sweep
to
high
mA
:
16
::
:
:
:
:
:
:
:
:
:
:
:
Specications and
5-10
Characteristics
HP
70810B
Lightwa
e
v
Section
User's
Guide
Menu Maps
This menu map graphically represents all top-level softkeys and their
associated lower-level softkeys (the top-level softkeys are located
along the left side of the display). Figure 6-1 illustrates the display
menu organization for the lightwave section softkeys. A description of
each softkey is listed in alphabetical order in Chapter 7.
What You'll Find in This Chapter
6
Softkey
Menu
Map
Stand-Alone
for
Operation
page
6-2
:
::
:
:
:
:
:
:
:
:
:
:
:
70810B Lightwa
HP
e
v
Section
User's
Guide
Menu
Maps
6-1
*
the
If
not
is
N
N
N
N
N
N
N
N
N
N
N
N
N
N
LAMBDA
lightwave
displayed.
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
850nm
section
The
N
N
N
N
softkey
an
is
N
N
N
N
N
N
N
N
N
N
N
N
N
N
LAMBDA
.
HP
N
N
N
NN
N
N
70810B
N
N
N
N
N
N
N
N
N
N
N
N
N
N
1330nm
N
N
N
N
N
N
softkey
Option 850,
replaced
is
the
softkey
the
by
6-2
Menu Maps
Figure
6-1.
Softkey
Menu
Map
Stand-Alone
for
70810B
HP
Lightwa
Operation
Section
e
v
User's
Guide
Dictionary Reference
This chapter contains descriptions of softkeys and front- and
rear-panel features and connectors.
What You'll Find in This Chapter
Alphabetical Listing of Softkeys, Connectors, and Latches::page 7-2
7
70810B Lightwa
HP
e
v
Section
User's
Guide
Dictionary
Reference
7-1
Alphabetical Listing of Softkeys, Connectors, and Latches
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
A UNITS
AutoMan
(absolute amplitude units) selects default amplitude
units. The softkey also allows either dBm or watts units
3
to be selected manually.
The function is preset for automatic mode and dBm
units annotation. To set the softkey function to manual,
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
ATTEN
Manual
press the softkey or select an alternate amplitude
readout unit using either the
(manual attenuator) allows the optical input attenuation
to be entered manually. The optical input attenuation
3
range is from 0 to 30 dB in 1 dB steps in optical decibel
NNNNNNNNNNN
dBm
or
NNNNNNNNNNNNNN
WATT
units.
In RF bypass mode, the lightwave section RF INPUT is
connected directly to its RF OUTPUT, bypassing the
optical input attenuator.
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
AUTZERO
On Off
(automatic
the
in
3
This function
zeroing to
according to
attenuator setting
below for
intervals
time
zeroing)
internal
occur
the
selects
power
preset
is
automatically
average
the
that
power
.
meter
ON,
to
power
selected.
is
ranges
automatic
.
which
at
and
zeroing
allows
given
being
Refer
their
softkey.
osets
of
the
intervals
time
the
and
table
measured
to
corresponding
the
ower
P
Attenuation
dBm
10
0
to
dBm
20
0
to
dBm
30
0
to
dBm
40
0
to
100
100
100
minutes
10
Time
minutes
minutes
minutes
Range
1
2
3
4
5
Optical
Level
0
10
0
20
0
30
0
0
40 to050 dBm 1 minute
During zeroing, the light input is blocked by the internal
optical attenuator wheel.
when the
When
N
N
N
N
N
N
N
NN
N
ZERO
See:
Off
N
N
N
N
softkey
N
N
N
N
N
ZERO
occurs
NN
N
N
N
selected,
is
N
N
N
N
pressed.
is
zeroing
softkey description for more information.
only
Dictionary Reference
7-2
HP
70810B
Lightwa
e
v
Section
User's
Guide
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
cal opt
power
(calibrate optical power) enables access to the calibrated
wavelengths and the user-specied power level
3
functions listed below.
Softkeys available with a standard HP 70810B:
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
1300 nm
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
1550 nm
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
USR CAL
On Off
Lambda (wavelength) 1300 nm
3
Lambda (wavelength) 1550 nm
3
User power calibration
3
Softkeys available with an HP 70810B Option 850:
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
850 nm
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
USR CAL
On
3
Off
Lambda (wavelength) 850 nm
power calibration
User
3
N
N
N
N
NN
N
N
N
N
N
dBm
HSWP
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
IN 1 LW
NNNNNNNNNNNNNNNNNNNN
IN 2
IN/OUT
N
N
N
N
N
N
N
NNN
W
for
a
in
signal
system
the
.
softkey functions
These
lightwave
to the
Refer
information.
more
to
used
is
When
lightwave
synchronizes
master
the
frequency
section when
related
select
the
softkey
dBm
lightwave
signal analyzer
system operation
.The
high-sweep signal
local oscillator
span.
are
using
units
section
is swept
necessary
OPTICAL
the
function
amplitude
for
is
system
through a
calibrate
to
INPUT
descriptions
readouts.
congured
HSWP
the
with the
while
high
is
selected
(lightwave input port) selects the OPTICAL INPUT on
the front panel of the lightwave section and activates
lightwave mode for the module.
When congured for stand-alone operation the
lightwave section functions as an optical-to-electrical
A
.
the
meter
power
signal
power
converter and
bar display
and
optical
an
numeric
average
readout
power
for
meter are displayed on screen.
(microwave input port) selects the RF INPUT on the
front panel of the lightwave section and activates RF
bypass mode for the module
. In RF bypass mode a signal
is passed directly from the RF INPUT to the RF OUTPUT
of the lightwave section.
70810B Lightwa
HP
e
v
Section
User's
Guide
Dictionary
Reference
7-3
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
850 nm
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
3
1300 nm
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
LAMBDA
nm
1550
(lambda wavelength 850 nm) selects 850 nm as the
calibrated wavelength when using the OPTICAL INPUT.
The appropriate wavelength depends on the lightwave
signal source that is applied to the input. The selection
of this function applies the appropriate correction terms
for this wavelength automatically.
This softkey is available only with an HP 70810B Option
850 lightwave section.
(lambda wavelength 1300 nm) selects 1300 nm as the
calibrated wavelength when using the OPTICAL INPUT.
3
The appropriate wavelength depends on the lightwave
signal source that is applied to the input. The selection
of this function applies the appropriate correction terms
for this wavelength automatically.
This softkey is available only with a standard HP
70810B lightwave section.
(lambda wavelength 1550 nm) selects 1550 nm as the
OPTICAL
the
using
calibrated
3
The appropriate
signal source
this
of
this
for
wavelength
that is
function applies
wavelength
when
wavelength depends
applied to
the input.
the appropriate
automatically
.
on the
The
correction
lightwave
INPUT
selection
terms
.
This
70810B
Mainframe/module
Module
latch
OPTICAL INPUT
RF INPUT
RF OUTPUT
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
ROM
VERSION
(ROM rmware version) displays the rmware version
of the lightwave section in the general information
3
annotation
softkey
lightwave
available
is
section.
only
with
standard
a
HP
interconnect
HP-IB
50-pin
The
HP-MSIB
lightwave
the
power
The
in
supply
module
a mainframe
(shipped
connector
accesses
communication
section
to
.
secures
latch
8mm
.An
mainframe) ts
the
with
the
and
buses
mainframe
the
lightwave
the
hex-ball driver
the lightwave
connects
section hex-nut latch.
Refer to Chapter 1 for lightwave section
installation and removal instructions.
The OPTICAL INPUT connector can be one of
several
Options"
types
in
listed
Chapter
as
10.
options
under
\Instrument
The RF INPUT SMA connector presents a 50
nominal input impedance
The RF OUTPUT SMA connector
nominal output impedance
display
the
of
block
.
provides a 50
.
.
and
kHz
40
section
Dictionary Reference
7-4
The
rmware
version
YEAR-MONTH-D
is
(yy-mm-dd).
Y
A
coded
HP
by
70810B
date:
Lightwa
e
v
Section
User's
Guide
NNNNNNNNNNNNNNNNNNNNNNN
RSPSVTY
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
select
input
x3x3x3x3x3x3x3x3x3x3x3x3x3x
SELF
TEST
3
NNNNNNNNNNNNNNNNNNNNNNN
service
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
units
menu
3
(responsivity) allows the lightwave section responsivity
to be displayed. Responsivity is a measure of the
lightwave section's voltage output per unit of optical
power input (units = volts/watt) at the RF output of
the lightwave section.
accesses the
NNNNNNNNNNNNNNNNNNNNNNN
IN 1 LW
and
NNNNNNNNNNNNNNNNNNNNNNN
IN 2W
softkeys.
3
performs a functional check of the power meter and
optical attenuator. If the self test fails, the appropriate
error messages are displayed.
If the self test fails, suspect a hardware failure. Contact
your nearest Hewlett-Packard sales and service oce.
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
ROM
(service menu) accesses the
VERSION
and
3
softkeys.
accesses the amplitude readout selections that are
available for stand-alone operation. The available
units
units
are:
amplitude
units
amplitude
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
UNITS
A
AutoMan
N
N
N
N
N
N
N
N
N
N
N
dBm
N
N
N
N
N
N
NN
N
N
N
N
N
N
WATT
readout selections
Absolute
3
dBm
att
W
x3x3x3x3x3x3x3x3x3x3x3x3x3x
SELF
TEST
3
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
CAL
USR
Off
On
displayed
3
calibration,
(user
be
to
level
specied
readout.
meter
function is
This
connector
o)
or
on
user
using
The
.
adjusted,
the
by
typically used
insertion-loss errors
allows
a
function
known
either
or to
the
input
osets
to
operate
power
the
correct
a user-dened wavelength that is not one of the
factory-calibrated wavelengths.
When the function is active, an absolute power level
oset is added to all power meter readouts.The
also
oset
returned
is
operations
aects
to
.
any power
a computer
Osets
are limited
approximately62dB
meter
during
.
information
remote-control
range
a
to
of
The user calibration function is preset o.
To enter an oset, enter the known amplitude value of
lightwave input signal, using the numeric keypad.
the
Terminate the entry with the
NNNNNN
dBm
NNNNN
NNNNNN
,
W,or
NN
NNNNNN
mW
The input value can also be modied using the
.
turn
knob
the
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
USR CAL
Off
On
function o
3
keys
495
eliminate an
o
T
4
press
INSTR
or
front-panel
the
oset,
PRESET
.
5
power
at
that
NN
softkey.
485
power
level,
and
or
70810B Lightwa
HP
e
v
Section
User's
Guide
Dictionary
Reference
7-5
NNNNNNNNNNNNNN
WATT
NNNNNNNNNNNNNN
ZERO
(watt units) selects watt units for the amplitude
readout.
(zero oset compensation) zeros the power meter.
NNNNNNNNNNNNNN
Pressing the
ZERO
softkey immediately executes a
zeroing of the osets in the internal average power
meter. The osets are primarily due to photodiode dark
current.
When the zeroing function is activated, a
ZEROING
...
message is displayed momentarily in place of the
numeric readout for the power meter. During zeroing,
the light input is blocked by the internal optical
attenuator wheel.
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
AUTZERO
See:
On Off
softkey description for additional
3
information.
Dictionary Reference
7-6
HP
70810B
Lightwa
e
v
Section
User's
Guide
Programming Commands
This chapter describes the syntax, parameters, and functions of the
commands used to operate an HP 70810B or HP 70810B Option 850
lightwave section as a stand-alone lightwave receiver.
What You'll Find in This Chapter
8
Syntax Conventions
Common
Commands
Alphabetical
Commands
Command
Functional
by
Command
Listed
::::::::::::::::::::::::::::::::::::::::::
:
:
::
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
Group
:
:
:
:
:
:
:
:
:
:
:
:
Order
:
::
::
::
::
:
:
:
:
:
:
:
:
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
arameters
P
Summary
in Alphabetical
page 8-2
8-5
page
:
:
:
:
:
:
:
8-7
page
:
:
:
:
:
:
:
8-8
page
:
:
:
:
:
:
:
8-10
page
:
:
:
:
:
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-1
Syntax Conventions
Pictorial Notation
Notation
ext
T
All items enclosed by an oval are literals and must be entered
exactly as shown.
Items enclosed by a rectangular box indicate parameters used in the
command sequence. A description of each parameter is given in the
respective command description.
Command sequence items are connected by lines. Each line can be
followed in only one direction, as indicated by an arrow at the end
of each line.
Any combination of command sequence items that can be generated
by following the lines in the proper direction is syntactically
correct.
A command sequence item is optional if there is a valid path around
it.
AL
CAPIT
Boldface
STYLE
TYPE
LETTERS Capital
entered
be
Boldface
must
Letters
words
key
parameters)
sequences
must
letters represent
exactly as
represent
exactly
type
this
be
using
letters
entered
(commands
to
used
shown
Items
.
be
entered
exactly
literals and
shown.
literals and
as
style
command
and
compose
in
as
shown.
indicate
command
this
shown.
are to
type
style
Command
Sequence
TYPE
typical
A
item
STYLE
command
specied
is
sequence
the
in
Letters
messages
syntax
using
that
represented
is
diagram
for
this
appear
above
each
style
type
on
The
.
respective
the
indicate
display
order of
command.
.
each
Programming Commands
8-2
HP
70810B
Lightwa
e
v
Section
User's
Guide
The \Syntax Summary" section provides a description of the syntax
elements shown in the sequence above.
Syntax Summary
command
separator
command parameter
terminator
Any valid command which is a literal and
must be entered exactly as shown.
Separators are required to separate command
sequences and command sequence items.
The separators allowed for the HP 70810B
lightwave section are as follows:
SP(space)
, (comma)
Any secondary key word recognized by the
command.
A terminator is required to end all command
sequences. The terminators allowed for a
lightwave section are as follows:
(semicolon)
;
LF(line
CR(carriage
feed)
return)
SP(space)
(comma)
,
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-3
Query Responses
Commands that set a function to a numeric value can be queried
to determine the current setting of that function. For example, the
OPTATN
The format of the query response for the
command sets the optical attenuator to a numeric value in dB.
OPTATN
command is shown
below.
Figure 8-1. Numeric Value Query Response
Other commands which control the binary state of a function can
also be queried to determine its state. Examples are commands which
acceptONand
other commands which accept
ZERO
command.
OFF
parameters such as the
AUTO
and
CALCOR
MAN
command, and
parameters such as the
The query response in these cases, as shown below, is either zero
(indicating that the queried state is o or inactive) or one (indicating
CALCOR?
the
that
return a
will
disabled,
returns
MAN?
manual
queried
zero
one
and a
one
a
operation,
state
if
if
and
on
is
optical
the
correction
if
power-meter
the
zero
a
active).
or
if
power
factors
is
it
example
an
As
error-correction
enabled.
are
zeroing
set
for
function
automatic
,
factors
query
The
set
is
zeroing.
are
ZERO
for
Figure
8-2.
Binary
State
Query
Response
Programming Commands
8-4
HP
70810B
Lightwa
e
v
Section
User's
Guide
Common Command Parameters
data byte
8-bit byte containing numeric or character data.
data byte & EOI
8-bit byte containing numeric or character data sent with
end-or-identify (EOI).
delimiter
!"$%&'/:=\@&^`|~
A character, chosen from the above list, marks the
beginning and end of a string of characters.For simplied
use, choose delimiters that are
character within the string they delimit. Otherwise,
every occurrence of the delimiter character inside the
string being delimited must be replaced with a
delimiters when forming the delimited string.
digit
0123456789
LF with EOI
Line feed (LF) with end-or-identify (EOI). ASCII code 10
(line feed) is sent with EOI control line.
number
Expressed
Range:
integer
in
+100
10
0
smallest
The
which
the
is
commands
when
units:
of
decimal,
,
through
be
may
of
range
This
.
numbers
not
exponential (E)
or
+100
+10
positive
fractional
represented
numbers
range
attached
are
the same as any
pair
number
100
0
+10
is
be
may
that
specic
to
restricted
further
is
of
form.
This
.
used
types
in
Precision:
Length:
1000
6
frequency
values
are
limited
to
GHz.
dBm
300
6
to
6
to
300 dBm
or
300 dB
values
.
amplitude
or
6
power values
dB.
300
6
limited
are
are limited
The above ranges may be further limited by
hardware. These limitations are identied
under the individual command descriptions.
approximately 15 decimal digits, unless
be
.
less
than 25
otherwise
complete
the
limited
number
hardware
by
must
characters.
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-5
Syntax Diagram:
units
The following power units are available:
dBm
watts
Programming Commands
8-6
HP
70810B
Lightwa
e
v
Section
User's
Guide
AUNITS
OPTATN
OPTPWR
RSPSVTY
CAL
CALCOR
OPTCOR
ZERO
LTWAVE
Table 8-1. Commands by Functional Group
Amplitude Commands
Amplitude units Species units for amplitude readouts.
Optical attenuator Controls the optical input attenuator.
Optical power Returns a measured value of optical power.
Responsivity Returns the overall responsivity of the
lightwave section.
Calibration Commands
Calibrate Executes power-meter correction.
Calibration correction Controls application of power-meter correction
factors.
Optical frequency response
corrections
Returns amplitude corrections for the
lightwave section.
Optical power meter zeroing Zeroes optical power meter.
Conguration Commands
Lightwave
mode
Enables
lightwave
signal
analysis
.
ERR
ID
MSG
REV
SER
TEST
USERMSG
XERR
DONE
HD
RQS
SRQ
STB
Information
Error Lists
Identication Returns
Message Returns
error
number
query
Output
Serial
Self
User
revision
number
test
message
Extended
Commands
errors
lightwave
contents
Returns
rmware
lightwave
Stores
number
and
.
Initiates
Writes
Lists
a
errors
by number
section.
returns
self-test
message
for
section
of
revision
the
routine
in
lightwave
the
only.
model
message
lightwave
.
message
the
area.
number
section.
number
.
of
section serial
area.
Input/Output Commands
Done Returns a \1" when all commands previously
entered are parsed.
Hold Blanks the readout and disables the keys until
executed.
Request
Service
Service
Request
Conditions
another
Denes
bit(s)
Sets
active
function
conditions
the
in
status
that
is
cause
byte
service
requests
to simulate
a
service request.
Status Byte Returns value of status byte
.
.
70810B Lightwa
HP
IP
e
v
Section
Instrument State Commands
Instrument Preset Sets all functions to their preset state.
User's
Guide
Programming
Commands
8-7
Table 8-2. Alphabetical Command Summary
Command Command
Description
AUNITS
CAL
Selects units for amplitude annotation and data.
Performs the lightwave section average-power
calibration routine.
CALCOR
Controls application of the average-power
correction factors.
DONE
Returns a \1" when all commands previously
entered are parsed.
ERR
HD
ID
errors
Lists
Blanks
readout
Identies
number
by
and
lightwave
only
disables
section
.
keys
by
model
number
Corresponding
Key
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
AUNITS
AutoMan
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
cal opt
power
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
USR CAL
On Off
3
3
3
|
|
4
5
HOLD
.
|
IP
LTWAVE
MSG
OPTATN
OPTCOR
OPTPWR
REV
erforms
P
Enables
Returns
lightwave
an
lightwave
contents
section
measurement
message
of
preset.
path.
area.
Controls the optical input attenuator.
Returns optical frequency response error
corrections.
Returns
measured
a
value
of
optical
power.
Returns lightwave section rmware version
number.
|
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
select
input
|
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
ATTEN
Manual
|
|
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
ROM
VERSION
3
3
3
Programming Commands
8-8
HP
70810B
Lightwa
e
v
Section
User's
Guide
Table 8-2. Alphabetical Command Summary (continued)
Command Command
Description
RQS
Dene conditions that cause a request service
condition.
RSPSVTY
SER
Returns responsivity value for the HP 70810B.
Stores and returns the lightwave section serial
number.
SRQ
STB
TEST
USERMSG
XERR
ZERO
Sets status bits to simulate a service request. |
Return value of status byte register. |
Initiates self-test routine. |
Writes a
message in
Lists errors
optical
Zero
for
power
the message
lightwave
the
meter
.
area.
section.
Corresponding
Key
|
NNNNNNNNNNNNNNNNNNNNNNN
RSPSVTY
|
|
|
x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x3x
AUTZERO
Off
On
N
N
3
N
N
N
N
NN
N
N
N
N
N
N
ZERO
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-9
AUNITS
Syntax
Example
Amplitude Units
OUTPUT
OUTPUT
state:
@Lws;"LTWAVE
@Lws;"AUNITS
Preset
Species units for amplitude readouts.
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
lightwave
ON;"
W;"
Select
Display
.
units
optical
dBm
:
:
:
:
:
:
:
:
::
::
::
::
:
:
:
.
mode
signals in
watt
Description
Query Response
AUNITS
The
displayed
AUNITS
lightwave
on
command
section
default-units
command
display
the
also
commands
path).
changes
screen
the
or
determines
when
of
units
returned
amplitude
the
units
no
amplitude
the
the
to
are
controller
assumed
units
explicitly
readouts
The
.
for
(the
given
Programming Commands
8-10
HP
70810B
Lightwa
e
v
Section
User's
Guide
CAL
CAL
Syntax
Calibrate
vailable
A
*
vailable
A
y
Executes the optical power correction routine.
70810B
only
only
for
for
use
use
with
with
standard
a
HP
an
HP
70810B
Option
.
850.
Example
Description
Related
command:
OUTPUT @Lws;"CAL
command
CAL
The
compensate
for
:
PRESET
applies
responsivity
1550;"
appropriate
the
variations
Selects
tions
1550
amplitude
the
in
preset
for
nm.
correction
lightwave
error
wavelength
a
section
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
:
circuitry.
The functions that can be executed individually are:
CAL OPTPWR
corrects the power meter, if possible, to display the
power level requested by the user. Approximate adjustment range
lightwave
(A
.
dB
2
6
is
used.)
OPTPWR
CAL
CAL PRESET
is
applies factory-determined corrections for
operating wavelengths
signal
, 1300 nm or 1550
70810B, or 850 nm for an HP 70810B
calibration
Option 850. The preset state
for this function is 1300 nm, or 850 nm with
This command automatically
turns o user-supplied optical power
corrections that have been enabled with the
disable
CALCOR
the
Use
correction
factor
command
.
to
enable
or
source is
required
nm for a standard HP
an Option 850.
CAL OPTPWR
optical
the
when
one of the
command.
power
CALCOR
correc-
of
that
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-11
CALCOR
Syntax
Calibration correction factor
Controls application of the optical
power correction factor.
Example
Description
Preset state:
Related
Disable
the
OUTPUT
::
command:
optical
power
@Lws;"CALCOR
::
::
::
::
:
:
:
:
correction factor
OPTPWR,OFF;"
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
.
Turn
CALCOR
:
:
:
:
:
:
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
rection
equest
R
factor
Query the
status
of
OUTPUT @Lws;"CALCOR
the
optical
OPTPWR,?;"
power
correction
power correction
ENTER
@Lws;A
Enter
into a variable.
The
CALCOR
power correction factor used by the
CALCOR
command enables and disables the user-supplied optical
CAL
command.
OPTPWR,
OFF
disables
user-supplied
the
optical
correction.
During normal operation, the correction factors for
are o. Set the command to on when you
optical power calibration factors
.
wish to use your own
OPTPWR,
:
:
:
:
:
:
:
:
:
::
::
::
o
factor
optical
power cor-
.
.
optical
status
of
factor.
returned status
power
CALCOR OPTPWR
OFF
CAL
:
:
value
Programming Commands
8-12
HP
70810B
Lightwa
e
v
Section
User's
Guide
DONE
DONE
Syntax
Example
Done
Use
DONE
previous
OUTPUT
ENTER
Returns a \1" to the computer when all prior commands
are complete.
to delay the execution of subsequent commands until all
commands have
@Lws;"DONE?;"
@Lws;A
been executed.
eturn a
R
ssign
have been
\1"
mands
A
\1" when
executed.
computer
to
the
variable
previous
com-
.
Description
Query
Response
DONE
The
commands
example
or
F
operation
commands
command
encountered
when
,
computer
the
of
been
have
returns
before
DONE?
executed.
\1" to
a
the
executed,
is
program
computer
the
command have
DONE
user
the
suspended
is
when
assured
is
until
of
all
executed.
the
previous
all
the
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-13
ERR
Syntax
Error
Returns codes of reported errors.
Example
Description
Interdependent command:
command
ERR
the
Use
to
::::::: :::::::IPclears the error register.
report
lightwave
section
errors
to
the
computer.
CLEAR @Lws
OUTPUT
ALLOCATE
OUTPUT
@Lws;"IP;";
Error_numbers$[50]
@Lws;"SAVES
OUTPUT @Lws;"ERR?;"
@Lws;Error_numbers$
command returns numeric error codes, if any have occurred.
The
ENTER
ERR
1;VIEW;"
Initialize
the
eturn
50-element
for
lightwave
two
lightwave
lightwave
to the
error
.
Create
puter
turned
Send
to
R
codes
Store
array
analyzer
the
unrecognized
computer
codes
.
array
storage
section
section.
section
in
in
any
of
errors
commands
error
.
computer
Refer to Chapter 9 for a description of each returned error message.
Error codes are stored in the error register as they occur.
none are
If
codes
returns
as
long
\0"
as
(zero).
are
they
Instrument
in
the
register
preset
.
clears
)
IP
(
the
ERR
present,
register.
error
returns
ERR
com-
re-
.
Query Response
Programming Commands
8-14
HP
70810B
Lightwa
e
v
Section
User's
Guide
HD
HD
Syntax
Example
Hold
Blanks the active function and disables the front-panel
knob, step keys, and numeric keypad.
command
HD
the
Use
CLEAR
@Lws
OUTPUT @Lws;"IP;";
OUTPUT
OUTPUT
OUTPUT
@Lws;"CF
@Lws;"WAIT
@Lws;"HD;"
blank
to
1GHZ;"
4S;"
the
active
function
Initialize
center
Set
active
the
graticule)
of
quency
4
ait
W
Blank
active
analyzer
frequency
function
value
seconds
readout.
.
displays
.
.
function
Notice
.
area
center
the
readout.
(left
that
side
fre-
Description
Query Response
command
HD
The
front-panel
function is
blanks
numeric
executed.
the
keypad,
active
step
function
keys
,
and
readout
,
knob
until
and
another
disables
active
the
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-15
ID
Syntax
Identication
Returns the lightwave section model number.
Query
Example
Response
OUTPUT @Lws;"ID?;"
ENTER
@Lws;N$
Return lightwave section model number.
Enter
variable
a
lightwave
.
section
model
number
into
Programming Commands
8-16
HP
70810B
Lightwa
e
v
Section
User's
Guide
IP
IP
Syntax
Example
Description
Instrument preset
Sets all functions to their preset state.
Preset the HP 70810B lightwave section.
OUTPUT
The
place
able
T
by
o
IP
@Lws;"IP;"
command presets
70810B
HP
the
8-3
the
shows
the
instrument
the lightwave
known
a
in
command
preset
state
functions
command,
.
section
that
.
IP
settings
are
.
executed
Use
or
to
IP
turned
Instrument
8-3.
able
T
Programming
Aected
or
Command
AT
AUNITS
CAL
Commands
Instrument
by
Preset
AT
State/Response
0DB
AUNITS
Preset
1300
DBM
CALCOR CALCOR OPTPWR OFF
ERR
Clear error register
HD HD
MSG
Blank message
ZERO ZERO AUTO
RQS
aect
not
does
)
IP
preset
(
Executed
Preset
(850)
,
,
REV
SER
,
SRQ
,
or
USRMSG
.
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-17
LTWAVE
Syntax
Lightwave mode
Enables lightwave or RF bypass mode.
Example
Description
Preset state:
Related command:
OUTPUT
OUTPUT
LTWAVE
The
.
mode
processed
When
electrical
directly
eectively
@Lws;"LTWAVE
@Lws;"LTWAVE
function
LTWAVE
With
a
as
LTWAVE
signals
the
to
bypassed
OFF
:::::: ::::::::: ::::::: ::::::::: :::::: :
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
RF
RF
ON
signal
is
the
at
output
ON;"
OFF;"
selects
signals
,
and
selected,
INPUT
RF
port.
case
this
in
either
at
sent
RF
The
.
lightwave
the optical
the RF
to
bypass
port
HP
output
mode
the
of
70810B
Species
Species
mode
input
is
HP
Not aected by
:
:
:
:
:
:
:
:
::
lightwave
RF
RF bypass
or
demodulated,
are
port.
activated
70810B
lightwave
:
:
:
:
:
:
bypass
and
passed
are
section
AUNITS
:
mode
mode
is
IP
.
.
Programming Commands
8-18
HP
70810B
Lightwa
e
v
Section
User's
Guide
MSG
MSG
Syntax
Example
OUTPUT @Lws;"MSG?;"
ALLOCATE
ENTER
Message$[40]
USING
@Lws
"-K";Cal,Cor,Message$
PRINT
PRINT
THEN
Cal
IF
Cor THEN
IF
PRINT
Message$[3]
PRINT
Message
Interdependent
Return the
"uncalibrated"
"uncorrected"
Returns characters contained in the message area on
the HP 70810B display.
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
::
:
:
:
:
the
on
message
messages
HP
string.)
the
string,
lightwave
the
to
to
ASIC
(string)
two
code
array
B
beginning
section
computer
for
Boolean
image
for
the
with
display
.
storage
variables
0
,
third
message
eturn
R
Create
message
ssign
A
string.
feeds
Print
command:
shown
the
computer
.
the
(The
into
the
:
USERMSG
::
::
.
character
of
and one
enters
K,
character
line
.
70810B Lightwa
HP
Description
Guide
User's
Section
e
v
The
MSG
command returns the characters shown in the message area
on the display, and also returns the
UNCAL
and
UNCOR
messages if
they are displayed. Whenever a message is in the message area, the
Message
bit of the status byte is set true.
Programming
Commands
8-19
MSG
Query Response
Programming Commands
8-20
HP
70810B
Lightwa
e
v
Section
User's
Guide
OPTATN
OPTATN
Syntax
Example
Optical attenuator
Preset state:
Range:
to 28
0
to 30
0
optical attenuator
the
Set
dB (optical)
dB (optical)
::::::: ::::::::: :::::: ::::::::: ::::::: ::::::::: ::::::
:
:
:
:
:
:
:
:
Controls the optical input attenuator.
steps
steps
1300 nm,
.
.
:
:
:
:
:
:
at 1550
at
0to
:
850
for
30 dB
nm,
nm,
dB
6
(optical) at
dB
1
in
dB
1
in
attenuation.
of
in
0dB
.
steps
dB
1
Description
Query Response
OUTPUT
OPTATN
The
70810B
HP
passes
through
photodiode
the average
the RF
output port.
@Lws;"OPTATN
command
lightwave
a
This attenuator
.
controls
section.
variable
optical power
6DB;"
the
The
attenuator
is used
meter and
optical
optical
before
increase
to
to control
input
input
being
attenuator
HP
the
of
applied
dynamic
the
signal
RF
the
the
in
70810B
the
to
range
level
PIN
of
at
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-21
OPTCOR
Syntax
Example
Optical frequency response corrections
Restrictions:
OUTPUT
@Lws;"OPTCOR 1?;"
:
for
sk
A
arameters
P
::
::
::
::
:
:
:
:
:
:
:
:
:
:
points
ENTER
@Lws;Npts
ALLOCATE
ENTER
@Lws;Optcor(*)
Optcor(1:Npts,1:2)
Get number
Allocate
ead
R
Returns amplitude
corrections for the
HP 70810B.
are
4
and
3
rmware
with
lightwave
section
.
to
pairs
of
hold
array
frequency/amplitude
all
to
not
dated
correction
follow
rest
available
880808.
.
data.
of
pairs
.
Description
are
There
(optical
or RF
section.
frequency
factory-stored
input
The data
value
is
returned
RF
to
stored
the
values
for
the
output)
in
(in
of
frequency-amplitude
a correction
Hz),
overall
70810B
HP
frequency
pairs
in electrical
response
lightwave
or
F
.
dB to
each
the
responsivity of the lightwave section is given.
Since the values returned by
OPTCOR
are corrections, they should be
added to signal measurements, or subtracted from the responsivity.
For example,if
OPTCOR
the
is
GHz
3.6
value
dB
6
RSPSVTY?
3.6
for
below
800,
returns a value of 800 (volts per watt), and
GHz
or
is
400
6
,then
dB
volts per
the
watt.
actual
responsivity
Parameter Data Returned
OPTCOR 1?
returns HP 70810B lightwave path (lightwave input to
RF output) correction data.
OPTCOR 2?
returns lightwave path correction data for the
calibrated system option. This data applies to the
combination of an HP 70810B with a specic RF or
microwave input lightwave section.
OPTCOR
3?
returns
RF
to
correction
output)
in
the
data
HP
the
for
70810B
bypass
.
path (RF
input
at
Programming Commands
8-22
HP
70810B
Lightwa
e
v
Section
User's
Guide
OPTCOR
Note
Query Response
OPTCOR 4?
Data received is not valid if correction data is requested for the
calibrated system option (parameter values of 2 or 4) from a lightwave
section without that option.
returns bypass path correction data for the calibrated
system option.
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-23
OPTPWR
Syntax
Optical power
Returns a measured value of optical power.
Example
Description
Related commands:
display
and
Read
OUTPUT
ENTER
OPTPWR
The
power
70810B
HP
measurement
trigger
@Lws;"OPTPWR?;"
@Lws;Optpwr
command
Optical
.
lightwave section,
to
commands
power
::::: ::::::::: ::::::: ::::
optical
power
returns
a
measurements
and
be completed
have no
after
eect on
from the
for
sk
A
reply
ead
R
measured
are
command
this
receipt
the
CAL OPTPWR,CAL PRESET
HP 70810B
optical
from
value
made
of
of
rate
.
70810B
HP
average
reading.
power
of
continuously
returns
the
the
request.
the
optical
.
optical
by
rst
HP-IB
power
measurement.
the
300
If
make an
to
dBm
is returned.
Power
is returned
signal-to-noise
accurate
measurement,
in current
ratio
at
photodiode
the
then
AUNITS
power
a
(watts
insucient
is
level
or
of
dBm).
0
This can often be remedied by decreasing the optical attenuation
(
OPTATN
), which will result in more light at the photodiode.
If the optical power meter is overranged (too much light input),
an inaccurate reading will result. The overrange bit in the status
condition.
to
.
cause
This
this
RQS
an
situation
on HP-IB
be
can
STB?
(
byte
request
service
whenever
remedied
indicate
serial
or
,
mask (
power meter
the
poll
RQS
on
)
HP-IB)
can
goes
will
be
also
overrange
set
by increasing the optical attenuation.
the
The
Programming Commands
8-24
Note
Be sure
to select the correct operating wavelength with
before making any optical power measurement.
70810B
HP
Lightwa
CALPRESET
Section
e
v
User's
Guide
REV
REV
Syntax
Example
Description
Firmware revision
Use the
lightwave
REV
OUTPUT
command to nd out the rmware version of the
section.
@Lws;"REV?;"
ENTER @Lws;N
command
REV
The
rmware
(ROM).
year|month|day
The
.
Returns the lightwave section rmware date
code.
rmware version
computer
to
value
70810B
HP
the
of
date:
by
returns
revision
the
eturn
R
Assign
revision
number
lightwave
rmware
date
coded
is
to comput
variable
.
Query
Response
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-25
RQS
Syntax
Request service conditions
:
:
:
:
:
:
:
:
:
:
:
::
::
Range:
Related
::
:
commands:
::
::
:
Denes conditions that cause service
requests.
Integers
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
to 255
0
,
STB
,
SRQ
:
:
:
:
Example
Description
programming
or
F
RQS
allowed
be
bit
4.
command
mask
whether
6
Chapter
The
request
will
indicates
such,
\Monitoring
examples
determines
to
service
the
in
System
species
which
generate
a
not
or
request
Operation"
refer
,
service
the
service
a
service
in
\Monitoring
to
in
bits
request.
request
mask has
Chapter
request
status
the
Bit
being
is
no signicance
for
4
System
mask
byte
6in
Operation"
The
.
of the
the status
generated and,
. Refer
information
more
service
analyzer
in
byte
as
to
(including a discussion on condition bits and event bits). The service
request mask is cleared (set to 0) when the lightwave section is turned
on, and also when the lightwave section receives a \device clear"
(HP BASIC CLEAR statement) on HP-IB.Table 8-4 describes the bit
assignments within the service request mask.
Programming Commands
8-26
HP
70810B
Lightwa
e
v
Section
User's
Guide
Table 8-4. Lightwave Section Status Byte
RQS
Bit
Number
Decimal
Equivalent
Analyzer State Description Bit
7 128 OUT OF RANGE Optical power is out of range for
optical average power meter (too low
or too high).
6 64 RQS Set when service request is being
generated.
5 32 ERROR-PRESENT Set when error register contains an
error.
4 16 COMMAND-COMPLETE Set at completion of command
execution.
3 8 ZEROING Optical power meter is executing its
zeroing function.
2 4 Not used
1 2 MESSA
0 1 Not
used
GE
when
Set
display
messages
message
appear
area.
in
the
Type
event
|
condition
event
condition
condition
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-27
RSPSVTY
Syntax
Responsivity
Returns the overall responsivity of the HP 70810B.
Example
Description
Restrictions:
OUTPUT
ENTER
command
This
70810B's
responsivity values
The
RF output
the
aect
@Lws;"RSPSVTY?;"
@Lws;Rsp
overall responsivity
responsivity.
:::::: :::
used
is
the
of
Available only in lightwave mode (
lightwave
in
mode
LTWAVE
(
.
the
optical
from
attenuator
indicate
HP
70810B
conversion
The
.
ON
to
)
optical
LTWAVE ON
query
input
setting
the
will
)
HP
to
Programming Commands
8-28
HP
70810B
Lightwa
e
v
Section
User's
Guide
SER
SER
Syntax
Serial number
Stores and returns the instrument serial number.
Example
Description
Query Response
characters
21
Range:
Maximum
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
:
:
:
:
:
:
:
:
:
of
DIM SER$[21]
OUTPUT @Lws;"SER$Your
#1 Analyzer$;"
OUTPUT @Lws;"SER?;"
ENTER @Lws;Ser$
The
SER
command stores the serial number of the lightwave section
in memory. SER may be used to return the stored number to the
computer. This is originally the ten-character serial number assigned
to the lightwave section by Hewlett-Packard. This serial number may
be loaded with whatever data is convenient.
the HP
If
used
70810B
determine
to
is
if
part
valid
a
of
system
calibrated
calibration
system,
is
serial
this
available
number
.
is
70810B Lightwa
HP
e
v
Section
User's
Guide
Programming
Commands
8-29
SRQ
Syntax
Description
Service request
:
:
:
:
:
:
Range:
The
status byte
:
command simulates
SRQ
.Use
containing service
subroutine
a
branched
detected.
section
to
Instead
errors
execute
,
Sets bit(s) in the status byte to simulate a service
request.
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
::
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
::
::
::
bits
of
program
your
error
lightwave
condition.
programs
SRQ
the
requests.
testing
of
service
command
F
whenever
the
32
SRQ
example
or
program
simulate
to
requests
test
to
,
lightwave
a
by
operation
the
suppose
initiating
by
error
an
setting
section
:
in
:
:
was
to 255
0
the
descriptions
the
See
\Monitoring
System
RQS
the
for
Operation"
and
Chapter
in
commands
STB
4.
See also
.
Programming Commands
8-30
HP
70810B
Lightwa
e
v
Section
User's
Guide
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