Newport 2832-C Instruction Manual

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Warranty

Newport Corporation warrants this product to be free from defects in mate­rial and workmanship for a period of 1 year from the date of shipment.
found to be defective during the warranty period, the product will either be
repaired or replaced at Newport's option.

To exercise this warranty, write or call your local Newport representative, or
contact Newport headquarters in Irvine, California. You will be given prompt
assistance and return instructions. Send the instrument, transportation
prepaid, to the indicated service facility. Repairs will be made and the instru­ment returned, transportation prepaid. Repaired products are warranted for
the balance of the original warranty period, or at least 90 days.

If

Limitation of

This warranty does not apply to defects resulting from modification or misuse
of any product or part. This warranty also does not apply to fuses, batteries,
or damage from battery leakage.

This warranty is in lieu of all other warranties, expressed or implied, including
any implied warranty of merchantability or fitness for a particular use.

Newport Corporation shall not be liable for any indirect, special, or conse­quential damages.

Warranty

Statement of Calibration

This instrument has been inspected and tested in accordance with specifica­tions published by Newport Corporation.

The accuracy and calibration of this instrument and photodetector (where
applicable) is traceable to the National Institute for Standards and Technol­ogy through equipment which is calibrated at planned intervals by compari­son to the certified standards maintained at Newport Corporation.

Copyright 1995, Newport Corporation
Part No. 21 104-01, Rev.
IN-0295 1 (03-99)

D

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EC DECLARATION OF CONFORMITY

Model

We declare that the accompanying product, identified with the

"(

Directive, 89/336/EEC and Low Voltage Directive 73/23/EEC.

Compliance was demonstrated to the following specifications:

EN50081-1 EMISSIONS:

EN50082-1 IMMUNITY:

IEC SAFETY:

mark, meets the intent of the Electromagnetic Compatability

Radiated and conducted emissions per EN5501 1, Group 1,
Class A

EIectrostatic Discharge per IEC 100042, severity level 3
Radiated Emission Immunity per IEC 100043, severity level 2
Fast Burst Transients per IEC 1000-4-4, severity level 3
Surge Immunity per IEC 1000 4-5, severity level 3

Safety requirements for electrical equipment specified in

IEC 1010-1.

2832-C

/

u~lain Danielo

VP European Operations

Zone Industrielle

45340 Beaune-la-Rolande, France

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General Manager-Precision Systems

iii

Jeff Cannon

179 1 Deere Avenue

Irvine, CA USA

Table

of

Contents

.

.

Warranty

.................................................................................................................

11

...

EC Declaration of Conformity

.........................................................................

111

.......................................................................................................

List of Figures vii

...

.......................................................................................................

List of Tables vill

..................................................................................

Safety Symbols and Terms ix

..............................................................................................................

Definitions x

Specifications

.....................................................................................................

xi

...

Detector Signals and Calculations

................................................................

xi11

Section

1

.

General information

.........................................................................................

1.1 System Review 1

..............................................................................

1.2 Scope of This Manual 2

......................................................................

1.3 Unpacking and Inspection 2

1.4 Preparation for Use

................................................................................

3

1.5 Optional Accessories and Services

.......................................................

3

-

-

Section

2

.

System Operation

2.1 Introduction

.............................................................................................

4

.......................................................................................................

Display 4
Top Level Key Functions

....................................................................

5

0

1

2.3.1

r-.

Power

...............................................................................

7

2.3.2 (LOCAL)/SHIFT

............................................................................

7

2.3.3 DISP.*.. Display Brightness

.........................................................

7

2.3.4 FILTER. Signal Filtering

..............................................................

7

...........................................................

2.3.5 ZERO. Offset Subtraction 8

................................................

2.3.6 AUTO. Automatic Gain Ranging 8

2.3.7 CH A

(B).

Display Channel A (or B)

.........................................

8

...............................................

2.3.8 ST0 REF. Store Reference Value 8

2.3.9 REF SEL. Select Reference

..........................................................

9

...............................................................................

2.3.10

A.

Wavelength 9

...................................................................

2.3.1 1 RANGE. Signal Range 9

..............................................................................

2.3.12 R/S. Run-Stop 10

.....................................................

2.3.13 MODE. Measurement Mode 10

.................................................................

2.3.14 UNITS. Display Units 10

..........................................................

2.3.15 STATS. Moving Statistics 11

2.3.16 R/S A

(6).

Run-Stop Channel A (or B)

.....................................

11

................................................................

2.3.1 7 EXT. External Trigger

11

...........................................................................................

2.3.18 MENU 12

.........................................................................................

2.3.19 ENTER 12

2.3.20 ESC. Escape

................................................................................

12

2.3.21

V.

A

.

4

.

b

Adjust

..................................................................

12

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...........................................................................

2.4 Menu Level Functions 13

...................................................

2.4.1 Menu Access and Movement 13

2.4.2 Data Store

...............................................................................

15

..................................................................

2.4.3 Meter Configuration 16

......................................................................................

2.4.4 Auto Cal 17

..................................................................................

2.4.5 Attenuator 18

.........................................................................

2.4.6 User Calibration 18

2.4.7 DC Sampling

............................................................................

18

...........................................................................

2.4.8 Trigger Output 19

..............................................................................

2.4.9 Trigger Input 20

2.4.10 Bar Graph

................................................................................

20

2.4.1 1 Remote Setup

.............................................................................

21

2.4.12 General Information Functions

................................................

21

..................................................................................

2.5 Connecting AC Power 22

.................................................................

2.6 Detector Connection and Setup

23

.......................................................................................................

2.7 Power Up 24

2.8 Performing Basic Measurements

..............................................................

24

2.8.1

Making DC Power Measurements

...........................................

24

Section

3

.

Principles of Operation

...........................................................................................

3.1 introduction 25

.................................................................................

3.2 Analog Signal Flow 25

3.3 Digitized Signal Flow

............................................................................

26

.......................................................................

3.4 Typical Detector Signals 27

3.5 Analog Output

........................................................................................

27

3.6 Measurement Considerations

..............................................................

28

........................................

3.6.1 Detector Calibration and Accuracy 28

................................

3.6.2 Quantum Detector Temperature Effects 28

3.6.3 Ambient and Stray Light

.......................................................

29

3.6.4 Common Measurement Errors

..............................................

29

Section

4

.

Computer Interfacing

4.1 General Guidelines

..............................................................................

30

4.2 Computer Interface Terminology

........................................................

30

4.3 Entering Remote Computer Interface Mode

......................................

32

.......................................................................

4.4 RS-232C Communication 32

...........

4.4.1 Setting Baud Rate and Echo Mode from the Keypad 33

4.4.2 Setting Baud Rate and Echo Mode from a Remote Interface33

........................................

4.5 RS-232C XON/XOFF Handshaking Protocol 34

4.6 GPIB Communication

...........................................................................

34

4.6.1

Setting the GPIB Address

.........................................................

34

Section

5

.

Remote

Command

Reference

5.1 Model 2832-C Remote Interface Commands

......................................

35

5.2 Device Independent Commands

.........................................................

38

5.3 Device Dependent Commands

.............................................................

48

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Section

6

.

Maintenance.

Test

and Troubleshooting

6.1 Maintenance Procedures

6.2 Power Up Self Test

.

6.3 Troubleshooting Guide

Section

7.1 Introduction

7.2 Obtaining Service
Service Form

7

.

Factory Service

..............................................................................................

Appendices

A

Syntax and Definitions

B

Error Messages

C

Status Reporting System

D Sample Programs

......................................................................

..............................................................................

........................................................................

-

.......................................................................................

..................................................................................

..........................................................................

..................................................................................

..................................................................

...................................................................................

79
79

80

82
82
83

85
89
92
97

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List

of

Figures

Model 2832-C Controller and Accessories
Model 2832-C VFD Display
Description of Model 2832-C Display Regions
Front Panel Key Pad
Decimal Point Indication of Menu Hierarchy Position
Rear Panel Power Supply Voltage Switches in Positions
Connecting a Detector with its Calibration Module
Model 2832-C Detector Calibration Module Input Port
Model 2832-C Analog Signal Flow Diagram
Model 2832-C Digitized Signal Flow Block Diagram
RS-232 Cable Connections

......................................................................

..............................................................................

....................................................................

..........................................

.....................................

.....................

.........................

....................

........................................

..........................

L.

R

.........

1

4
4

6
13
22
23
23
25
26
33

vii

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List

of

Tables

Table 1

.

Table 2

.

Table 3

.

Table 4

.

Table 5

.

Table 6

.

Table 7

.

Table 8

.

Table 9

.

Table 10

.

Table 11

.

Table 12

.

Table 13

.

Table 14

.

Table 15

.

Table 16

.

Table 17

.

Table 18

.

Table 19

.

Table 20

.

Table 2 1

.

Table 22

.

Table 23

.

Model 2832-C Display Annunciators

..........................................

5

Model 2832-C Top Level Key Functions and Associated
Remote Commands

.....................................................................

6

.........................................

Model 2832-C Measurement Modes 10
Valid Display Units Available to Detector Families by MODE 10
Displayed Unit Abbreviations vs

.

Actual Measurement Units . 11

Menu Level Key Functions and Parameters

...........................

14

Data Store Operations

...........................................................

15

................

Configuration Parameters and Default Conditions

16

Meter Configuration Operations

..............................................

17

User Calibration Operations

.....................................................

18

..............................................

SAMPLE PREC States and Limits

19

DC SAMPLING Operations

.........................................................

19

.........................................................

TRIGGER OUT Operations 20

EXT TRIGGER IN Operations

.....................................................

20

BARGRAPH Operations

.............................................................

2 1

REMOTE SETUP Operations

.....................................................

21

GENERAL INFO Operations

.......................................................

21

Power Supply Voltage Switch Positions

..................................

22

Common Measurement Errors

................................................

29

Model 2832-C IEEE-488.1 Capabilities Summary

.....................

34

Device Independent Status Commands

...................................

35

Device Dependent Commailds

..................................................

36

Symptom/Fault Troubleshooting Guide

..................................

80

viii

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Safety Symbols

and

Terms

The following safety terms are used in this manual:

WARNING

The
in personal injury or death.

The

CAUTION

age the instrument.
In addition, a

beneficial in the use of this instrument.

heading in this manual explains dangers that could result

heading in this manual explains hazards that could dam-

NOTES

heading gives information to the user that may be

--

GENERAL WARNINGS AND CAUTIONS

The following general warnings and cautions are applicable to this

instrument:

WARNING

This instrument is intended for use by qualified personnel who

recognize shock hazards or laser hazards and are familiar with safety

precautions required to avoid possible injury. Read the instruction

manual thoroughly before using, to become familiar with the

instrument's operations and capabilities.

WARNING

The American National Safety Institute (ANSI) states that a shock

hazard exists when probes or sensors are exposed to voltage levels

AC.

greater then 42VDC or 42V peak

portion of the Model 2832-C (or any attached detector or probe) and

earth ground or a shock hazard will result.

Do not exceed 42V between any

CAUTION

There are no user serviceable parts inside the Model 2832-C. Work

performed by persons not authorized by Newport may void the

warranty. For instructions on obtaining warranty repair or service

please refer to Section

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5

of this manual.

Definitions

A
AC
ADC
BAT
BIC

BNC

C

DC

F
fA
Hz

I-v

kHz

LSD
k
mA
mV
n A

nF
nm

PA

RH

SIN

PA

PS

v

W

amps
alternating current
analog-to-digital converter

battery option
biconic fiber connector
standard coaxial connector type
degrees Centigrade

direct current
degrees Fahrenheit
femtoamps
hertz (cycles per second)

current-to-voltage converter
kilohertz
least significant digit
kiloohms

milliamps
millivolts
nanoamps
nanofarads
nanometers
picoamps

relative humidity

serial number

microamps
microsecond
volts
watts

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Specifications

Physical Specifications:

Dimensions:
Weight:

x

8.8

x

4.2

8

lb, 3 oz (3.7 kg)

13.9 in (107 x 224 x 353 mm)

Enclosure:
Connectors:

Power:
Display:
Display Update Rate:

Gain Ranges:
dent)

Operating Environment:
Storage Environment:
Compatible Detectors:

Metal case, painted

%Pin Sub Mini DIN CAL MODULE Inputs;

(2)
(2) BNC Analog Outputs, Trigger Output and

Trigger Input;

9 Pin D-Sub RS-232,24 Conductor GPIB

100/120/220/240 VAC +lo%, 50160 Hz

5.5 digit annunciated VFD

Up to 7 decades (Detector and MODE depen-

0°C

-

40°C; < 70% RH noncondensing

-20°C

-

60°C; < 90% RH noncondensing

Low-Power (Semiconductor) Family

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Electrical Specifications:

DC

Current Measurement (Low-Power, Semiconductor Photodiode CAL MODULE)

Signal Range:'.2
Full-Scale C~rrent:~

AID Resolution:

(20,000

Display Noise Floor: 18LSD

(Input Open, Filter Off)

Full-scale Acc~racy:~

(Typical)

Full-Scale Acc~racy:~

(Worst-case)

'

Listed signal ranges specify meter capability. Available signal ranges are detector dependent.

Maximum measurable signal is detector dependent. See description of detector saturation message "SA, page

After
Full scale current may vary due to AUTOCAL compensation

Count Precision)

60

min warm-up, followed by execution of AUTOCAL command. See Section

0 1 2 3 4 5 6

2.51

nA

126

fA

+

0.1% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05%

+0.48% .30% .30% .30% .30% .30% .30%

25.1

1.26

I1

LSD

nA

pA

251

12.6

I

1

nA

pA

LSD

2.51
126

I

1

of

DC offsets.

pA

pA

LSD

25.1

1.26

I

1

pA
nA

LSD

2.4.4.

251

12.6

I

1

pA

nA

LSD

2.50
126

I

1

LSD

Analog Output

Full Scale Voltage:

0 - 2.5V

into

50Q

mA
nA

80.

Accuracy: + 2.5%

xii

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Detector Signals

and

Calculations:

(S-~,)/R,

STO-REF

STO-REF

Represents the most recent signal value
obtained from the A/D converter. It may
represent amps or volts and may be analog
and or digitally filtered.

Represents the value stored as a reference
signal for subsequent use in signal offset,

i.e.

ZERO calculations. S,=O when ZERO

is

off.

Represents the most recent net signal value.
This

is

the value that

is

displayed when units

are set to Amps or Volts. Note that Sd

=

0

when ZERO

is

off.

Measurement calculation when the display
units are Watts or Joules. Rk

is

the detector
responsivity associated with the current
wavelength setting.

Measurement calculation when the display
units are ten times the (base ten) logarithm of
the ratio of the measured power to

1

mW, i.e.

dBm.
Measurement calculation when the display

units are the ratio of measured power to the
value stored by the STO-REF function.

Measurement calculation when the display
units are ten times the (base ten) logarithm of
the ratio of measured power to the value

stored by the STO-REF function.

xiii

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xiv

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Section

1

General Information

System

Review

The Model 28324 DualChannel Power Meter

ment with a wealth of measurement and triggering features designed to
provide measurement sensitivity, flexibility and speed. In spite of its power,

is

Model 28324
access to basic features and a shallow menu for access to advanced features.

Great flexibility exists within the command structure of the Model 28324 so
that even complex measurements can be set up quickly and easily. The
28324 can react to or provide triggering or data log up to
per channel!

The Model 28324
family tree of the 28324 compatible detectors and accessories

1

Figure

below.

also designed to provide simple operation with direct panel

is

compatible with Newport's Low-Power detector family.

is

a high performance instru-

1,000

measurements

is

shown in

A

Figure

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1

1

-

Model

2832-C

Controller and Accessories

The Model 28324 connects to detectors through a calibration module con-

taining information unique to the detector being used. Calibration modules

are ordered with a detector at the time of purchase and are labeled with the

detector's model number and serial number. Detectors with calibration
modules have a "/CM appended to their model number.

EXAMPLE: 818SL (no calib. module) 818SL/CM (with calibration module)

Scope of

Thii

Manual

Please carefully read this instruction manual before using the Model 28324

Be

DualChannel Power Meter.
cautions throughout this manual.
contact Newport Corporation. This instruction manual contains the necessary
information for operation and maintenance of the Newport Model 28324
Channel Power Meter

if

service
Section 1
Section 2 System Operation
Section
Section
Section
Section
Section
Appendix A Syntax and Definitions
Appendix

Appendix

necessary. This information

3

4
5

6

7

B

C

as

especially careful to observe the warnings and

If

any operating instructions are not clear.

well

as

information for troubleshooting and obtaining

is

divided into the following sections:

General Information and Functional Description

Principles of Operation
Computer Interfacing
Remote Command Reference
Maintenance, Test, and Troubleshooting
Factory Service

Error Messages

Status Reporting System

Dual-

Unpacking

and

Inspection

Appendix

All Model 28324 Dualchannel Power Meters are carefully assembled, tested
and inspected before shipment. Upon receiving this instrument, check for any
obvious signs of physical damage that might have occurred during shipment.
Report any such damage to the shipping agent immediately. Retain the
original packing materials in case reshipment becomes necessary.

D

Sample Programs

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The Model 2832C DualChannel Power Meter should have some operations
performed before measurements are made. These include:

Connecting AC Power (Section 2.5)

Optional

Accessories

Detector Connection and Setup (Section

and

Services

The Newport Catalog presents uptdate information on detectors, detector
accessories and detector calibration services available for use with the Model

1

2832C. Refer to Figure

for the Model 2832C family tree of accessories.

2.6)

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Section

2

System Operation

Introduction

The Model 2832-C
learning curve. This section starts by giving a brief listing of display, key pad
and menu command features. Much of the Model
obvious after these descriptions. The manual then explains each key opera­tion and menu command in detail. Reference each of these detailed explana­tions as required when getting started.

The Model
be clearly observed with most laser goggles and at high angles of incidence.
Figure 2 illustrates and identifies the primary regions and annunciators within
the Model 2832-C's display.

28324 incorporates

n n

'a.

I

MODE:%

is

designed to provide quick operation and to avoid a steep

n n

a.

8.8.8.

DC

SNGL CONT FILTER: ANLG + DIG

2832C's operation will be

a

vacuum fluorescent display,

n

n

a.

DlSP: CHA CHB

WI

@I

EI

MI

ul ul

61

VFD,

MI

which can

Figure 2a -Model 2832C

Measurement
Acltvlty
Annunciator

Measurement
Mode
Annunciators

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+

I I

-

Primary Channel

~easurement Display Area

1

=

DC SNGL CONT

Secondary Channel, Bar Graph, Menu and Message Display Area

Figure 2b - Description of Model 2832C Display Regions

4

I

I

VFD

=

I

Units Display

I

Display

CHA

CHB

+

I

Display Channel
Annunciators

Signal Filtering
Armunciators

Table

1

-

Model

Z83ZC

Annunciator Comment

Display Annunciaton

CH A

CH B

DC
SNGL

CONT

ANLG

DIG
SHIFT

MENU

The display

primary display area.

The display is showing Channel B information in

primary display area.
Blinking indicates that the meter is making

measurements.
Meter is set to make
Meter will make only one measurement per front

panel or external trigger.
Meter will continuously make measurements until

stopped.
Analog signal filtering is on.
Digital signal filtering
Indicates that the next key press will execute a blue

key function.
Meter and display are in menu mode. Measurement

is

stopped.

is

showing Channel A information in

DC

signal measurements.

is

on.

STORE

USRCAL

EXT
AUTO
ZERO
A'ITN

Operating controls for the Model

panels of the Model

are

controls
Section
quick access to measurement functions and menu access to advanced fea­tures and setup parameters. Most of the keys on the front panel only affect
the channel indicated by the display channel annunciators. Table
Sections
Menu

used. Rear panel controls are used for AC line power setup,

2.5.

The front panel key pad

2.3.1

level key

28324.

through

functions are discussed in Section

2.3.21

is

Meter
data logging.

User (versus calibration module) has supplied the
detector responsivity in use.

External trigger input is enabled.
Automatic signal gain ranging is on.
Background signal subtraction (zeroing) is on.
The responsivity in use includes the affect of the

detector's attenuator.

logging measurements into memory, i.e.

2832€

For measurement operation, only the front panel

list and describe each top level key function.

are found on both the front and rear

of

the Model

28324,

Figure

3,

provides

2

and

2.4.

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Figure

3 - Front Panel Key Pad

Table

2

-

Top Level Key Functions and Associated Remote Commands

Keypad Remote Commands Description

DISP*

FILTER

ZERO

AUTO
CH A

CH B

ST0 REF

REF SEL

None

None

DISP, DISP?

FILTER-n, FILTER-n?

ZERO-n, ZERO-n?,
STOZERO-n, ZEROVAL-n?

AUTO-n, AUTO-n?
DISPCH, DISPCH?

DISPCH, DISPCH?

STOREF-n, STOREF-n?

REFSEL-n, REFSEL-n?

Turns the Model

If

the meter is in the remote mode.
depressing this key puts the meter into
the local mode. Also, this key enables the
blue key functions.

Cycles display brightness:
OFF,LOW,NORM and HIGH.

Cycles signal filtering:

OFF, ANLG, DIG and ANLG+DIG.

Zeroes the display via offset subtraction.

Turns automatic gain ranging on and off.
Selects channel A as the primary display

channel.

Selects channel B as the primary display
channel.

Stores last reading for future dB and

REL measurements.

Selects the reference source to be used

tor dB and REL measurements.

2832-C

on and off.

)i

RANGE

v..

R/S

MODE

UNITS

STATS

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LAMBDA-n, LAMBDA-n?

RANGE-n, RANGE-n?
None

RUN, STOP

MODE-n, MODE-n?

UNITS-n, UNITS-n?

STSlBn, STSIZE-n?, STMAX-n?
STMIN-n?, STMXMN-n?
STMEAN-n, STSDEV-n?

RUN-A, RUN-A?

Displays and edits the calibration
wavelength in use.

Displays signal gain range in use.
Adjusts gain range or parameter

values or moves through a list.
Toggles the signal acquisition of

both channels.

Cycles meter between allowed

measurement modes.

Cycles display measurement units

between those allowed.
Displays statistics.: Max, Min,

Max-Min, Mean and Std.

Starts and stops channel A signal

acquisition.

Dev.

R/S

B

RUN-B,

RUN-B?

Starts and stops channel
acquisition.

B

signal

EXT EXT

MENU None Enter or exit
ENTER None

ESC None

4,

None

Note: n in a remote command stands forA (channel A) or B (channel B).

Enable or disable external triggering.

MENU

command mode.

Select next lower menu level or enter

edit mode.
Escape to next higher menu level or

escape edit mode.

Zooms

bargraph in or out. When in
Edit mode, selects the digit to be
edited by the

V,

A

keys.

2.3.1 &A, Power

The

AA

key toggles the Model

the

&A

key in until it clicks and stays in its depressed position. To turn the

meter

off,

press the key again until it clicks and rebounds to its original length.

If

the meter

LOCAL key and puts the meter into the local mode. The remote mode is desig-

nated on the front panel by displaying an asterisk

the secondary channel display area.

is

in the remote mode, depressing this key the first time serves

2832€

on and

If

the meter

off.

To turn the meter on, depress

#f

at the right-hand side

is

in the local-lockout mode,

as

of

a

is

displayed on the front panel.

-

If

the meter

When SHIFT
functions (such as STOREF) are enabled. The next key press will cause that
blue function to be executed and the "shift status" to disable.

2.3.3 DISP:+., Display

This key cycles the display and the backlit key pad through: OFF, LOW, NORM
and HIGH brightness levels. This allows a user to operate in a dark environ-

ment without light pollution from the display, (except for one dim scanning
decimal point and the measurement activity annunciator). When the display is
OFF, the R/S, R/S A, or R/S

ments. Any other key press returns the display to the LOW brightness state
while ignoring the key function.

2.3.4

Press this key to cycle input signal filtering between: OFF, ANLG, DIG,
ANLG+DIG. This function provides methods of lowering the noise observed in

the measurement data and the analog output. When the ANLG annunciator is

lit, a 5Hz low pass filter lowers the noise floor by attenuating high frequency

signal components.

is

not in the remote mode, pressing this key serves as a SHIFT.

is

pressed, the SHIFT display annunciator lights and the blue key

Brightness

B

keys may be used to manually trigger measure-

FILTER,

Signal Filtering

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When the DIG display annunciator

10-sample averaging buffer before being further processed, stored or commu-

nicated to the display or computer interfaces. With DIG on, all observable
values represent digitally averaged results relative to the original
sions. This averaging is independent of the subsequent processing available

through the STATS buffer, Section

is

lit, measurements pass through a moving

A/D

conver-

2.3.15.

2.3.5 ZERO, Offset Subtraction

This key turns offset subtraction on and off. When turned on, the ZERO

annunciator lights and the last signal reading

from all subsequent signal readings S. This causes subsequent signal calcula-

tions (and the display) to use the value

Offset subtraction allows one to remove the effects of ambient DC signals, by

zeroing the display before making a measurement. Pressing the ZERO key a

second time turns off the ZERO annunciator and stops offset subtraction.

is

saved

as

SS, instead of S.

S, and subtracted

2.3.6 AUTO, Automatic Gain

The AUTO key toggles automatic signal ranging on and off. When on, the

AUTO annunciator lights and the signal range (amplifier gain) is adjusted to

utilize maximum analog-to-digital converter resolution. When AUTO

off, the AUTO annunciator

current state.

Signal range can be manually controlled by the

V

,

A

arrow key when AUTO

AUTO off and executes the manual range change. See RANGE, Section 2.3.1

Signal range changes will often not coincide with observable changes to the

as

display value

adjust independently. Signal range gains will occur in

or manual ranging.

AUTO gain ranging

a SNGL measurement MODE, AUTO will turn back on if it was on when the

SNGL measurement mode was entered. (See MODE, Section 2.3.13)

2.3.7

The 2832-C has a primary channel and secondary channel display area. The

primary channel

channel displayed underneath it in slightly smaller characters.

Depressing the CH A key causes channel A to be the primary display channel.

The CH

display channel annunciators will indicate which channel

primary display channel. When a display channel is selected, the front panel
will change to reflect its settings and measurement data. Operations from the
keypad or menu that affect a specific channel will only affect the currently

displayed primary channel and not the other.

CH A

B

the display

is

0,

Display Channel A (or

is

displayed in larger, bold characters, with the secondary

key causes channel B to be the primary display channel. The

is

is

not allowed in SNGL measurement modes. When exiting

Ranging

is

turned

turned off and the signal range

V , A

arrow keys. Pressing an

is

on (and STATS, MENU and hare off), turns

scaled by the detector responsivity and so must

1

is

left in its

decade steps when auto

B)

is

currently the

1.

2.3.8

ST0

REF

use in relative measurement calculations. When units are relative,
the stored reference
units are logarithmic relative, dB, and the stored reference is selected the

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REF,

ST0

causes the last measurement,

Store Reference Value

is

selected, the displayed value

D,

to be stored

as

D,

is

the ratio

for subsequent

REL,

DIDrd.

and

When

displayed value
stored in the units of Watts. Press ST0 REF to cause a new D, to overwrite the
existing

D,

is

value.

the function

10

log (DID,). D,

is

always a power reading

NOTE

When not using remote interface operation and when displaying relative dB
or REL measurements with the stored reference selected, the message
display area will show the ST0 REF value used in the calculation.

2.3.9

The REF SEL key

relative, REL, and logarithmic relative, dB, unit readings. Press the REF SEL

key to display the reference source in the message display area. The EDIT

annunciator will be lit and the current selection will blink. Press

select a new reference source. The choices will be:
ST0 REF

USR REF
Device Dependent Commands)

CH A@) -The other channel
Press ENTER to accept the new reference source and exit the select reference

mode. Press REF SEL or ESC to exit without changing the reference source.

REF

SEL,

Select Reference

is

used to select the reference value, Dref, to be used for

-

The last stored measurement

-

User defined reference

(see

V, A to

the USRREF command in Section

5.3

NOTE

The CH A(B) source
other channel
will not be able to select it.

2.3.10

A detector calibration module contains responsivity data for its assigned
detector at discrete wavelengths. By telling the meter which wavelength is
being measured, the correct responsivity value
measured power or energy. When
points, linear interpolation

A,

Wavelength

is

only applicable

is

not available then N/A will appear next to CH A@) and you

is

used to approximate the true responsivity value.

if

the other channel

a

wavelength

is

available.

is

used in calculating the

falls

between two calibration

If

the

Press the
display area. Press ENTER to light the EDIT annunciator and cause the last
digit of the wavelength to blink. Press
down and
to accept the new wavelength and exit the wavelength edit/display mode.
Press

2.3.1 1 RANGE,

RANGE key allows the user to view the amplifier signal range. Signal ranges
step in
the meter's analog-to-digital converters. The available signal ranges are
detector dependent. Press RANGE to display the signal range number in the
message display
the detector signal varies more than a decade in magnitude. Signal range changes
can occur without an effect on the displayed measurement value. Press RANGE a

second

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A

key to display the measurement wavelength in the message

V, A to adjust the blinking digit up or

4,)

to change which digit blinks. Press the ENTER a second time

h

or ESC to exit without changing the wavelength.

Signal

1

decade gain increments in order to utilize maximum resolution from

area.

time to exit the signal range display mode.

If

AUTO

Range

is

on, then the signal range number will change

if

Press the
is on, pressing the
range to change. Manual ranging
recording equipment.

V , A

arrow keys to increase or decrease the signal range.

V,

A

arrow keys will disable AUTO and cause the signal

If

AUTO

is

useful when working with external analog

NOTE

Pressing the
range even when the signal range is not being displayed via the RANGE key.

The

RJS

channels simultaneously.

R/S

key press causes one reading to

R/S

key press toggles continuous data acquisition on and off.

The activity annunciator (Figure 2b) flashes to indicate that readings are being
taken on the displayed channel as indicated in the upper right hand corner of
the display. The indicator is off when data acquisition on the displayed
channel has been stopped. In the special case that both channels are started
together in DC CONT mode the readings will be synchronized together with
channel A readings leading channel B readings by about 70
channels run independent of each other.

V , A

arrow keys will disable AUTO ranging and change the signal

runstop key provides front panel control over data acquisition for

If

the channel

is

in SNGL measurement mode, each

be

taken.

In

CONT measurement mode, each

psec. Otherwise the

both

2.3.13 MODE, Measurement Mode

The Model 28324 acquires data in either continuous or in a single-step mode.
Press the MODE key until the desired mode is indicated in the mode annuncia-

tor area of the display. Table
on the 2832-C.

3

gives a description of the two modes available

Table 3 - Model 2832C Measurement Modes

Mode Description
DC CONT Measurement occurs at a programmable sample rate,

Section 2.4.7.

DC SNGL

2.3.14

Measurements can be displayed in various units. The set of available units is

described in Table 4. Press the UNITS key to cycle the display through the set
of available units.

UNlTS,

Table

4

-

Valid Display Units Available to Low Power Detectors by MODE.

MODE A W W/cm2 dBm dB

DCSNGL

A measurement is taken every time the meter receives a
trigger up to a 500Hz rate when two detector calibration

modules are plugged into the meter and
(AUTO

is

disabled in SNGL mode.)

lOOOHz for one.

Display Units

0

0 0

0

REL

0

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denotes the default units for the detector in the given measurement mode.

5

Some display units are abbreviated. Table
measurement units. Display units are limited to four characters in order to
provide for display engineering prefixes such as: p, n,
micro, milli and kilo respectively).

Table

5

-

Displayed Unit Abbreviations Versus Actual Measurement Units.

Actual Units A W W/cm2 dBm dB REL
Displayed Units A W W/cm dBm dB L+dd

lists displayed units versus actual

p,

m and k (pico, nano,

2.3.15 STATS, Moving Statistics

The STATS key causes a list of statistical results from the stats buffer of the

display channel to be displayed in the message display area. The stats buffer

is

a moving data window containing the most recent measurements to a depth

1 I N I 100.

data acquisition or storage and results are continuously updated.
Press the STATS key to enter the stats display list. The first statistic displayed

will be the stats buffer depth
the list. The following statistics are available:
and STD DEV.

When the STATS buffer depth, N, is displayed, it can be adjusted by pressing
ENTER and using the
key to adopt the new value for N and escape the edit mode. The STATS buffer

is

cleared whenever a new stats buffer depth N, or MODE or UNITS is estab

lished. Press the STATS key a second time to exit the stats display mode.

The default value

V,

A

keys to set a new value for N. Press the

is

N

N.

Press the

=

10.

Display occurs without disrupting

V

,

A

adjust keys to move through

N,

MAX, MIN, MAX-MIN, MEAN

ENTER

2.3.16 R/S

The R/S A and R/S B run-stop keys provides front panel control over data
acquisition for each individual channel. When in SNGL measurement mode,
each R/S A@) key press causes one reading to be taken on the respective
channel. In CONT measurement mode, each R/S A@) key press toggles
continuous data acquisition on and off on the respective channel.

The activity annunciator (Figure 2b) flashes to indicate that readings are being
taken on the display channel as indicated in the upper righthand corner of the
display. The indicator
has been stopped.

2.3.17

EXT enables and disables the triggering of data acquisition through the rear
panel trigger input BNC connector. The meter can be configured to be
triggered by either a rising or falling edge

Press EXT to light the
both channels. The Model 2832€ will still respond to triggers from the R/S,
A, or R/S B keys even when the EXT trigger
second time to turn off the annunciator and disable the external trigger input.

A@),

RunStop Channel A (or

EXT,

External Trigger

B)

is

off when data acquisition on the displayed channel

TTL signal. See Section 2.4.9.

EXT

annunciator and enable the external trigger input to

is

enabled. Press the

EXT

R/S

key a

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2.3.18

The MENU key provides access to advanced features and parameters. Press
the MENU key to stop all data acquisition, light the MENU annunciator, and

display the first item of the top level menu list. Press the MENU key a second
time to immediately exit the menu. Menu structure and functions are pre-

sented in Section
values. Most parameter values can be edited to configure the meter. Lists are
moved through via the
ENTER key. To escape a lower level list, press the ESC key.

In the menu, all key functions are ignored except for the MENU, ENTER, ESC
and the

Pressing SHIm will toggle the SHIm annunciator, but it will not effect anything

else

To edit a displayed parameter press ENTER. This enables the edit mode and
causes the parameter (or a digit) to blink. Press the
parameter through its allowed list or to count the blinking digit up and down.
When adjusting a numerical value, the
which decimal digit blinks. Press ENTER to adopt the new value and escape
the editing mode. Press ESC to leave the editing mode without adopting the
new value.

MENU

2.4.

The menu consists of a series of lists and parameter

V, A keys. To move to a lower level list, press the

V, A keys. Each key will act without having to initially press SHIFT.

when in MENU mode.

V, A keys to adjust the

4

,

b

keys can be used to change

2.3.19

ENTER allows one to move lower into the menu when in menu mode, to enter
editing mode when an editable parameter
new parameter value after it has been edited. Editable parameters can be

found both in and out of the menu mode.

editable parameter is being displayed, the key press

2.3.20

ESC

escape editing mode when editing a parameter value without adopting any
changes to the parameter. At the top level of the menu, pressing the
exits the menu mode. The
display modes such
range display modes. When there
ignored.

2.3.21

The
In normal operation, the
signal gain. In any other mode, the
or to adjust a blinking digit. The4
and in edit mode, select which digit of a numerical value will blink.

ENTER

is

being displayed and to adopt a

If

ENTER

ESC,

Escape

allows one to escape to the next higher level when in menu mode and to

ESC

key also allows one to escape various other

as

STATS or wavelength display or amplifier signal gain

is

nothing to escape from, the

V , A

,4

,

b

Adjust

V

,

A

,4

,

b

keys allow one to adjust various parameter states and values.

V , A

keys turn

AUTO

V , A

keys cause one to move through a list

,

b

keys zoom the bargraph

is

pressed when a non-

is

ignored.

ESC

ESC

key is

off and adjust the amplifier

(4

in, b out)

key

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Menu

Level

Functions

Menu functions provide control over parameter values and methods
making measurements. The menu consists

6

eter values. Table

menu functions and parameters. Most settings displayed in the menu and
changes to those settings affect the channel indicated by the display
channel annunciator.

2.4.1

To access the menu press MENU. The MENU annunciator will light and data

acquisition will stop. Menu labels and parameter values are displayed in the
message display area. The first, second and third
within this

level of the menu hierarchy, Figure
and their hierarchy.

Menu

area

presents a quick summary

Access

indicate a current position at the top, second, third or fourth

and

Movement

Top Level

Second Level

4.

Table 6 presents the menu functions

0

of

0

a number

of

leftmost decimal points

of

lists and param-

the hierarchy

0

of

of

the

. .

Third Level

1.1. 1.

Fourth Level

Figure

4

-

Decimal Point Indication

In the menu, valid keys
move through the menu or edit a parameter value. In the menu, it is not
necessary to hit the SHIn key to invoke the action

ESC

or

ENTER,
but with no effect on subsequent pressings of other keys. Once in the menu,
the rules for moving through the menu are

i. Press ENTER to move to the next level down or to enter the edit mode if a

editable parameter is being displayed and to accept a parameter value in

its currently displayed state and exit edit mode.

ii. Press

top level or to exit edit mode without changing the parameter value being
edited.

iii. Press MENU to immediately escape the menu regardless

within the menu.

iv. Use the

level. Also use these keys to adjust a parameter or decimal value when in

edit mode.

V , A, 4 ,

ESC

to move to the next level up or to escape the menu when at the

V,

A

are

limited to those needed to perform operations to

b

.

The SHIn key will toggle the SHIn annunciator,

keys to move up or down through a menu list on a given

1.

1.

of

Menu Hiemrchy Position

as

follows:

9.

of

the menu keys: MENU,

of

current level

v. Use the

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4

,

b

keys to select the digit being adjusted when in edit mode.

Table

6

-

Menu Level Key Functions and Parameters

Top Level
DATA STORE

SAVE CONFIG

RECALL CONFIG
AUTO CAL

A'ITENUATOR

USER CALlB

DC SAMPLING

TRIGGER OUT

Second Level Third Level
DATA STORE OFF

<-

->

DATA STORE
CLR DATA BUFFER
(or DATA BUFFER CLR)
SLIDE BUFFER
D-BUF SIZE dddd

VIEW DATA
SAVE TO

RCL

A'ITN

d

DEFAULT,

ON, Off

d

USR CAL OFF
USR RESP
PRESENT RESP

SAMPLE PREC

<-

->

<-

->

<-

->

<-

->

<-

->

<-

->

<-

->

SLIDE,

D-BUF-SIZE

dddd

USR CAL

d.dd&?d

d.dddEkd AfW

PREC=

RX

OF dddd

ON, OFF

lyW

20000, 4096

CNT
SAMPLE FREQ

TRIG ON CMPLT

TRIG POLARITY
TRIGGER FREQ
TRIGGER LEVEL

<- ->

<-

->

<- ->

<-

->

<- ->

FREQ

=

ddd.ddd

TRIG

ON CMPLT,

TRIG

ATFREQ

TRIG

ON

LEVEL.,

TRIG

OUT Off

TRIG ACTIVE

FREQ=

LVL='

dddd.ddd

hi.ddd

ON, OFF

BUFFER

dddd

HZ

,

LO, HI

HZ

Ehid

W
EXT TRIGGER IN
BAR GRAPH OFF
REMOTE SETUP

GENERAL INFO

Items in
denoted by

bold italics

d.

ENTER and ESC.

FALLING, RISING

BAR GRAPH

ON, OFF

GPlB ADDR dd

BAUD RATE

9600

EDGE

<-

<- ->

->

GPlB ADDR
BAUD RATE

2400,4800,9600,19.2K

-232 ECHO OFF

<-

->

RS232 ECHO

MODEL 2832-C

SW VERSION d.d

DETECTOR INFO

<- ->

MODEL

xxxxxx

DETSNddddd
A'ITN SN ddddd
CAL

ddMONyyyy

type are editable states or decimal values. Decimals are

Move vertically via the

V , A

keys. Move horizontally via

dd

1200,

ON, Off

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2.4.2

Data

Store

The Model 28324 allows a user to save up to

of

2000

channel for a total
an internal buffer for subsequent viewing or transmission over a computer

interface. A separate buffer is maintained and configured for each channel.
Data is maintained on power down, but lost when
loaded, Section 2.4.3, or when the buffer is cleared via the CLR DATA BUFFER
command or when data with new units is being stored.

The data store buffer operates in two ways: SLIDE

tion, the buffer slides along storing the most recent measurements up to the

of

size
pushed out and lost. In
buffer is full. After this, data acquisition stops and no additional data can
stored without first clearing the buffer via the CLR DATA BUFFER command.
DATA BUFFER CLR is displayed when the buffer is empty.

The size
value
before dropping old data or stopping data storage.

Data storing
STORE annunciator.

When in CONT mode, data acquisition and storage is resumed immediately

the buffer. Beyond this,

of

the buffer is set by the D-BUF-SIZE

dddd

to establish the number

is

enabled by the user via the DATA STORE menu function. Edit

ON,

the

upon exiting the menus if acquisition is active
acquisition
data acquisition and storage requires an initiating R/S key press, external
trigger or a remote RUN command upon exiting the menu.

OEFcondition to enable or disable data storing and the associated

is

not active when the menu is entered, or when in SNGL mode,

measurements. These measurements are stored in

as

data enters the buffer, the oldest data is

FIX

configuration, data storing continues until the data

of

1000

measurements for each

a

new configuration is

or

FIX.

In SLIDE configura-

dddd

menu function. Edit the

data points that the buffer will hold

as

the menu is entered. When

be

can

be

of

dddd.

viewed

is

Buffer data

in the measurement

buffer:

dddd

dddd = 0001

value

via

the

VIEW

area

while the message

Use the

the first,

V , A

i.e.

the oldest datum.

DATA menu command. Data are displayed

area

displays the position within

keys to move through the buffer data. The

the

NOTE

When DATA STORE is off, CONT acquisition mode behavior defaults to the
condition where data acquisition is begun without the requirement

a

starting trigger. SNGL acquisition modes always require

acquisition.

Table

7

-

Data Store Opemtions

Menu Operation Keypad Commands Associated Remote Commands

DATA STORE
DATA BUFFER CLR or

CLR DATA BUFFER

SLIDE,

D-BUF-SIZE dddd

VIEW DATA Press ENTER and use

ON, OFF

FIX

BUFFER Edit

Edit

ON, OFF

If

CLR DATA BUFFER, DSCLR-n

press ENTER to clear buffer

SLIDE,

D-BUF-SIZE

Edit

V , A

keys.

status. DSE-n, DSE-n?

FIX

BUFFER DSBUF-n, DSBUF-n?

dddd

DSSZ-n, DSSZ-n?

DS-n?, DSCNT-n?, DSUNITS-n?

trigger for each

of

a

NOTE

n in a remote command stands for A (channel A) or B (channel B).

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2.4.3

Meter

Configuration

The Model
meter and to recall that configuration for later use even
turned off. This
nonvolatile memory. Configuration buffers are numbered
being a DEFAULT buffer which can only
reset state of all the buffers except the default buffer

28324

provides a method to save the configuration

if

is

accomplished through configuration buffers maintained in

be

recalled but not saved to. The

is

empty. Empty buffers

of

the entire

the meter has been

0

to 9 with buffer

0

cannot be recalled.
A recalled configuration becomes the current configuration of the meter. Any

changes to the current configuration must be saved via SAVE CONFIG or they

is

will be lost when a new configuration
The meter will not recall a configuration that

recalled.

is

not compatible with either
detector calibration module currently plugged into the meter. Configurations
using the same model of detector are compatible while configurations using
different models of detectors are incompatible. The list of configuration

as

parameters stored in a configuration buffer as well

8

Table

below:

8

-

Configuration Pammeters and Default Conditions

-

DC CONT

listed in Table

Parameter Default Condition
MODE

h,

Lambda Lowest available

their default values are

PRESENT RESP PRESENT RESP
USR

CAL OFF

A7TN OFF

FILTER
DC SAMPLE PREC
DC SAMPLE

FREQ

OFF

20,000
25

Hz

CNT

AUTO ON

RANGE
ZERO
Zero Value

REF SEL ST0

Reference Value

STATS Buffer Size

DATA STORE

Lowest available
OFF

0.000

REF

0.001
10

OFF

DATA STORE BUFFER SLIDE

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Parameter Default Condition
D-BUF-SIZE 100
Data Store Units Same as UNITS

EXT OFF
EXT TRlG IN

TRIGGER OUT

FALLING
TRIG ON CMPLT

TRIG OUT POL TRIG ACTIVE LO

=

=

0.001

30 Hz

W

TRIG OUT FREQ FREQ
TRIG LEVEL

BAR GRAPH

LVL

OFF
GPlB ADDR 05
BAUD RATE 9600

These parameters adopt the following default values at power up and are not

affected by recalling a configuration or by setting the configuration to default.
6232 ECHO OFF
Local Lockout OFF
Display Brightness NORMAL
Table 9. below lists the menu commands effecting the saving and recalling of

meter configurations.

Table 9 -Meter Configuration Operations

Menu Operation Keypad Commands

Associated Remote Commands

SAVE CONFIG

Adjust SAVE TO

d,

*SAV

and ENTER

RECALL CONFIG Adjust RECALL

d,

*RCL,*RST

and ENTER

2.4.4

AUTO

CAL

The AUTO CAL command causes the 2832-C to perform AID conversions of

amplifier offset voltages (zero errors) arising from aging and temperature
effects. These conversions are then used in subtracting the appropriate error
voltage from each reading during normal operation. The 2832€ automatically

is

performs this procedure every time it powers up (or

reset). To achieve
stable reading at the specified accuracy, AUTO CAL should be executed for
each channel after a minimum 60 minute warm-up period from power-up.

Simply press ENTER when AUTO CAL

is

displayed. The display message area
will display "ONE MOMENT", followed by a buzzer sound indicating that
AUTO CAL is complete. Low Power detectors do not have to be connected to
the 28324 or removed from the radiation source to effectively execute AUTO
C AL.

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2.4.5 Attenuator

The Attenuator selects the responsivity value,
detector alone or the value for the
ON the AITN annunciator

is

attenuator
alone responsivity
USR CAL

used. When AITN

is

is

on (Section 2.4.6) the AITN setting has no effect.

used.

is

If

detector-with-attenuator.

lit and the responsivity of the detector-with-

is

OFF, the annunciator

the detector does not have an attentuator, or if

&,

to be the value for the

When AITN

is

off and the detector-

is

2.4.6 User Calibration

The Model 28324 allows one to create a detector responsivity which over­rides the responsivities obtained from the detector's calibration module. This
allows one to account for the effects of additional optics and filters in the
measurement path. When USR CAL
the meter adopts the responsivity value displayed by the editable USR RESP
value. Use the PRESENT RESP function to display the current calibration
module responsivity.

The USR RESP units are the same as the PRESENT RESP units. Table 10 lists
the possible user calibration operations.

Table

10

Menu Operation Keypad Commands Associated Remote Commands
USR CALlB

ON,

OFF

Edit USR CALlB USRCALn, USRCAL-n?

ON,

off

is

on, the USR CAL annunciator

-

User Calibration Operations

is

lit and

USR RESP Edit

PRESENT RESP ENTER to view

*These units are not editable.

d.dddEkdd

d.dddEMd

A/W* USRRESP-n, USERRESP-n?

RES

P-n?

A/W*

NOTE

n in a remote command stands for A (channel A) or B (channel B).

2.4.7

The Model 28324 incorporates two analog-tdigital,
with 20,000 count resolution and a second with 4096 count resolution. The

user may select which
and DC SNCL acquisition modes. All other modes use the 4096 count
The 20,000 count
When two detector calibration modules are plugged into the meter, the 4,096
count
detector calibration module is plugged into the meter, the 4,096 count
converter can operate at sample rates up to 1000

The SAMPLE PREC menu command, Table 11, selects which analog-todigital
converter
nels can be adjusted within the limits imposed by the SAMPLE PREC state, see
Table 12. When the SAMPLE PREC state changes, the sampling frequency
defaults to 25
SAMPLE PREC state. The SAMPLE FREQ and the SAMPLE PREC settings affect
both channels, not just the display channel.

DC

Sampling

(A/D)

converters, one

AD will

A/D

converter can operate at sample rates up to 25

A/D

converter can operate at sample rates up to 500

be

used for both channels during

Hz.

Hz.

is

used for both channels. The sampling frequency for both chan-

Hz

if the existing SAMPLE FREQ is incompatible with the new

DC

CONT

AID.

Hz.

When one

A/D

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SAMPLE PREC

Table

I I - SAMPLE PRECStates and Limits.

A/D

Accuracy Sample Frequency Range

20000

CNT

4096

CNT

Menu Function
SAMPLE PREC Edit PREC=

SAMPLE FREQ Edit FREQ= SFREQ, SFREQ?

2.4.8

The Model
activities among other instruments. The trigger output can operate in several
ways: conversion complete, periodic output and comparator output. In
addition, the polarity of the trigger output can be specified.

Trigger

2832C's

20,000
4,096

Keypad Commands Associated Remote Commands

4096

ddd.ddd

Output

counts

counts

Table

12

-

DC

SAMPLING Operations.

20,000,

CNT

HZ

rear panel lTL trigger output allows it to coordinate

0.001

Hz to

25.0

0.001

Hz

to

500.0

SPREC, SPREC?

Hz

Hz or

1000.0

Hz

CAUTION

Precautions should

coordinate activities among

may

meter

cause

false

be

taken whenever the trigger output

instruments.

triggering,

causing

Static

discharges

the trigger output to go active.

is

at or

used

near

to

the

In TRIG ON CMPLT mode, a pulse is output after each reading has been
acquired and completely processed from either channel. When acquiring on
one channel, it indicates that the

width of this pulse

In TRIG
Each pulse width is at least
pulses is

In TRIG ON LEVEL mode, each measurement is compared to a programmable
trigger level. The units
detectors.
output
trigger output becomes active. The TRIG ON LEVEL output is a shift in level
rather than a pulse.

If

between subsequent triggers is less than
initiated twice, then the separation between
RUN command initialization, giving a time
tween channel triggers (depending on sample frequency chosen).

The polarity of the trigger output is programmable
low.
active low then the line will idle high.

AT

FREQ mode, a pulse is output at a user defined frequency or rate.

0.001

If

is

inactive.

both channels are sampling when this function is initiated, the time lag

If

the polarity is active high then the output will idle low.

is

at least

Hz to

1000.0

of

the trigger level always equal Watts for power

a measurement is less than the specified value, then the trigger

If

the measurement exceeds the specified value then the

283242

8

pS.

8

pS

and the programmable frequency range of the

Hz.

is ready to take another reading. The

700

pec.

If

a

R/S

A or

R/S

B

is

lTL

OUTPUTS is relative to the

lag

up to one sample period be-

as

active high or active

If

the polarity is

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Table

13

-

TRIGGER

Menu Function Keypad Commands Associated Remote Commands

OVT Operations.

TRIGGER OUT Edit

TRIG POLARlTY Edit
TRIGGER FFEQ Edit FFEQ=
TRIGGER

2.4.9

The Model 2832C's rear panel TTL external trigger input can be enabled or

disabled, Section 2.3.17, and have its edge polarity set. The edge polarity is
accessed via the EXT TRIGGER
falling edge triggering.

The external trigger affects both channels and, like the
acquisition trigger when in SNGL modes and acts like a toggled acquisition gate

when in CONT modes.

The external trigger pulse width must be 2200 ns. In DC SNGL mode, the

delay from the trigger input going active to the start of the
<80 ~s.

LEVEL

Trigger

Edit LVL=

Input

77UG
77UGATFREQ
77UG
77UG

ACTNE

Table

14

ON

GWLT

TRIGOUT, TRIGOUT?

ONLEVEL
0UTom

M,

LO

dddddd

ddd&d

IN

menu function and can be set to rising or

-

EXT

TRIGGER

TRIGOUTPOL, TRIGOUTPOL?

Hz

TRIGOLITFREQ, TRIGOUTFREQ?

W TFUGOUT'LVL, TRIGOUT'LVL?

R/S

key, acts like an

AID conversion

IN

Operations.

is

Menu Function
EXT TRIGGER

2.4.10

A

high resolution analog bar graph is provided for visual feedback when
performing optical alignment tasks. This bar graph uses the message display
area and functions differently depending on the measurement units. When the
measurement units are W, W/cm2, or
display area. When using dBm units, the bar graph
(0 dBm) level, moving towards the left or right with decreasing or increasing
display values, respectively.

The
zoom the bar graph into
subsequent
bar graph may go off-scale when changing from one measurement unit to
another. Pressing either
proper scale.

The bar graph
When the meter is put into the remote mode with the bar graph enabled,
the bar graph is automatically replaced by the second channel reading.
However when the meter
be displayed again.

Bar

4

,

b

keys can be used to zoom the bar graph in and out. Press 4 to

4

Keypad Commands Associated Remote Commands

IN

Edit

RISING,

FALWNG

EDGE EXT?

EXTEDCE, EXTEDCE?, EXT,

Graph

A,

the bar graph

a

lox magnification which auto-centers with each

press. Press b to zoom out to normal lx magnification. The

4,

b

key will bring the bar graph back into the

is

not displayed when the meter is in the remote mode.

is

put back into the local mode, the bar graph will

is

left-justified in the

is

center-justified at a 1mW

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Table

15

-

BARGRAPH Operations.
Menu Function
BAR GRAPH

2.4.1 1

The Model

Remote

2832-C

Keypad Commands Associated Remote Commands

Edit

BARGRAPH BARGRAPH, BARGRAPH?

ON, OFF

Setup

provides both

RS232

and IEEE488 computer interfaces

as

standard features. Each interface requires that certain parameters be set.

4,

Remote interface setup and commands are discussed in Section

Computer

Interfacing.

Table

16 - REMOlE SETW Operations.

Menu Function Keypad Commands Associated Remote Commands

GPlB ADDR dd Edit GPlB ADDR

BAUD RATE dddd Edit BAUD RATE

2400,4800,9600, 19.2K

RS232

ON, OFF

2.4.12

ECHO Edit

RS232

ON, OFF

General Information Functions

General information about the Model

dd

1200,

None
None

ECHO ECHO, ECHO?

28324

and any attached detector can be
found using the GENERAL INFO menu functions. These functions display the
Model

2832-C

software version, the detector's model number, serial number,

associated attenuator serial number and calibration date.

1

7

-

Table

GENERAL INFO Operations.

Menu Function Kev~ad Commands Associated Remote Commands

MODEL cccccccc For viewing only. DETMODEL?

SW VERSION d.d

For viewing only. *IDN?

DET SN ddddd For viewing only. DETSN?

ATTN SN ddddd For viewing only. ATTNSN?

CAL

ddMonyyyy For viewing only. CALDATE?

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Connecting

AC

Power

Model 28324 can be configured to operate with line voltages

Hz.

240 VAC, 50-60
using the following procedure:

i.

Configure the Model 28324's power supply voltage selection switches to

match the nominal local voltage. See Figure 5 and Table 18.

ii.

Plug an AC line power cord to the rear
connect the cord to AC power.

Figure

5 - Rear Panel Power Supply Voltage Switches in Positions with

Switch

Switch 1 Position Switch 2 Position Nominal Local Voltage

I

Right Right

Before turning the meter on, configure it to local voltage

of

the Model 28324

SWITCH

set to Left and Switch 2 set to Right

Table

1-rn

18

-

Power Supply Voltage Switch Positions.

SWITCH

of

100/120/220/

and

then

2

100 VAC

Right Left

Left Right 220 VAC
Left Left 240 VAC

120 VAC

WARNING

This product

ruption of the grounding connection can create an electric shock

If you

contact your electrician to perform the necessary alterations to assure

that the green meen-yellow)

is

equipped with a 3

are

unable to insert the plug into your wall plug receptacle,

wire

wire

grounding

is

attached to

type

plug. Any inter-

earth

ground.

hazard.

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Power

Up

Turn on the Model 2832C by depressing the front panel key until it clicks in
and remains in its depressed position. The Model 28324 will perform a power

up self test and then configure itself to its last operating state.
operating state is not compatible with one of the current detectors, the 2832C
adopts the default configuration appropriate to this new detector.

does not pass its self test or fails to respond to front panel key commands,

refer to Section

6,

Maintenance, Test and Troubleshooting.

If

the last

If

the meter

Performing

Basic

Measurements

Basic measurement techniques for using the Model 2832C are covered in the

following sections. Refer to Table 2 and Table 6 (pages

for a review of the Model 2832C's functions and capabilities. The following

instructions assume familiarity with the meters functions. They also include

steps to incorporate background correction and assume that the experimental

setup underfills and does not saturate or damage the detector.

2.8.1

The following process describes the procedure for making basic optical power

measurements while properly removing the influence of ambient light and

other drift effects.

i. Plug in a

module and then turn the meter on. Set MODE to DC CONT, set AUTO on

and set the measurement wavelength to the desired value.

ii.

Cover or otherwise block the source that you will be measuring and then

turn ZERO on.

iii.

Uncover the source so it illuminates the detector and note the display value.

This reading is the optical power observed by the detector due to the source.

6

and

14

Making

DC

Power Measurements

Newport Low-Power detector via its associated calibration

respectively)

NOTE

The process

between when you zero the display and when you make your measurement.

Remember,

detector can see you as a changing ambient DC signal!

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as

detailed assumes that the ambient signal

if

you can

see

your detector as you move around, then your

is

not changing

Section

3

Principles of Operation

Analog Signal Flow

Detector data
module specific to the detector in use. At power up (and
uploads information about the detector from the calibration module which
describes the set of operating states available to the detector. A user then
selects among the available operating states when using the meter. Front
panel control and the operating states of the Model
Sections

The analog signal flow

ments are made, and

setting. A block diagram of the analog signal flow

is

introduced to the Model

2.3

and

2.4.

is

independent of whether SNGL or

is

primarily determined by the signal range and the filter

Range R4

2832-C

b-

Prog. Translmpedence Prog. Vonage

Current Amp.

Amp. Nose Filler

Prog. Bandwidth Vonage

by way of a calibration

RESEV,

2832-C

is

shown in Figure

are discussed in

CONT

r>

Buffers

the

2832-C

measure-

8.

+

@

Analog

Output

4.096

Figure 8 - Model 2832-CAnalog Signal Flow Diagram

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Cnt

20.000

Cnl

Signals that are captured by one of the analog-todigital converters are further

9.

processed as illustrated in the signal flow block diagram of Figure
signals are acquired by the analog-todigital converters and have the units of
current. These digitized signals move through a number of process steps
which may or may not alter the digitized value depending upon the operating
state of the meter. Each of these possible processing steps
their order of occurrence.

is

discussed in

Raw

Calib.

Module

Figure

9

DIG

-

-

Finer Mwb)

-

Gain

+

ZERO

Responsivily

t

4

---

I I

Front Panel

Figure

9 - Model

Digital

If

average of the most recent 10 digitized values. When
been acquired since the last reset of the digital filter, the output
of all the values received. The digital filter
turned on and whenever the UNITS or the range changes or when the MODE
key is pressed.

Filter

the digital filter annunciator DIG

2832C

Digitized Signal Flow

is

on. Section

2.3.4,

is

reset when the Model

Block

Diagram

the filter output

less

than 10 values have

NOTE

When using the digital filter in SNGL acquisition mode, each measurement is
the average of the last 10 acquisitions independent of how old any of the
measurements are.

1

r

is

the average

D

is

2832€

the

is

Gain

Gain processing accounts for the signal gain of the input amplifiers. The
output is the product of the digitized value and the amplifier gain.

Zero

Offset

Zero offset is active whenever the ZERO annunciator is lit, Section

less

zero offset output is equal to the input value
SS,.

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the zero reference value,

2.3.5.

The

Responsivity Map(s)

This process scales the input value in accordance with current calibration
wavelength and the responsivity map downloaded from the detector calibration

is

module. The output of this process, i.e. the measurement value,
input value divided by the responsivity associated with the current calibration
wavelength or the user defined calibration value. Different responsivities are
used depending upon

if

the attenuator, AITN, annunciator

is

the digitized

lit, Section 2.4.5.

Units Correction

Units correction adjusts a measurement value to account for the display units
selected. When the display units are equal to the detector signal units, i.e. equal
to the numerator of the responsivity units, the measurement value is not
adjusted. Otherwise the digitized value
responsivity and/or additional unit conversions such

is

adjusted to account for detector

as

W to W/cm2.

NOTE

Per area unit conversions such
by the active area of the detector. This calculation assumes that the entire
active area of the detector
where the entire detector active area
user must insure that these conditions are met before utilizing per area units.

as

W to W/cm2 divide the measurement value

is

uniformly illuminated. Per area measurements

is

not uniformly lit are not accurate. The

Analog

Output

is

The flexibility of the Model 28324 analog signal flow

it may properly measure the signals that various types
Basic optical power measurements are related to a measured detector signal,

S,

in the following way:

Where:

Newport Low-Power semiconductor detectors provide a current signal. The
2832C
ity performance with these detectors.

The Model 2832-C provides a 0 to 2.5 volt, into 50R,BNC analog output for
signal monitoring. The analog output is the actual amplified detector signal
and is uncorrected for the effects of the detector's responsivity, AUTO CAL,
and ZERO.

R,=

Detector responsivity at

S

=

Detector signal

is

capable of lOOfA resolution in order to provide the highest sensitiv-

A.

required in order that

of

detectors make.

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Measurement Considerations

This section describes detector characteristics, optical and electrical consid­erations, and environmental influences on optical measurements. In general,

measurement accuracy is limited by the accuracy of the detector calibration.

Accurate measurements, however, are also dependent upon proper set-up,
control of temperature and illumination conditions and understanding the

factors that affect optical measurements.

3.6.1

Newport Corporation calibrates its detectors using secondary standards
directly traceable to the United States National Institute of Science and

Technology (NIST) or to Great Britain's National Physical Laboratory (NPL).
The details and accuracy of the calibration procedure vary with each detector

model but a detailed description of the calibration results is supplied with

each individually calibrated detector. In general, detector calibration accu-

racy varies from
detector will also have some variation in response over its surface. Therefore,
for the most reproducible measurements, light should illuminate the detector
as uniformly as possible over as large an area as practical.

Detector Calibration and Accuracy

2%

to

5%

in absolute terms and varies with wavelength. Each

CAUTION

Avoid focusing a light source onto the detector surface. Inaccurate

readings and possible detector damage

manual

NIST traceability requires that detectors be recalibrated on one year intervals.

As

individual detector responses change with time, especially in the ultravie
let, recalibration is necessary to assure confidence in the accuracy of the
measurement. For the most reproducible measurements, the same detector
should always be used for measurements which are to be directly compared.

for saturation or damage thresholds.

may

result. Consult the detector

3.6.2

Newport Low-Power semiconductor detectors, are affected by temperature.

At long wavelengths, quantum detectors typically lose sensitivity with increas-

ing temperature. Additionally, detector dark current increases exponentially

with temperature.
Observed dark current

detector and a meter's amplifier and is typically larger than the theoretical
dark current limit. Silicon detectors are inherently quieter than germanium
detectors due to their higher internal resistance and lower capacitance. The
noise or drift in the dark current sets a lower bound on the measurement
resolution which can be achieved with any given detector. Cooling a detector

significantly lowers its dark current and dark current noise.
The observed dark currents can also be zeroed at any moment via the ZERO

function. Since dark currents drift with temperature, the ZERO should be
adjusted just prior to taking any measurements.
constant, sensitivity changes and dark current drifts are significantly reduced.

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Quantum Detector Temperature Effects

is

often dominated by the interaction between the

If

the detector temperature is

3.6.3 Ambient

Ambient and stray light striking the detector should be considered when

making a measurement. Ambient light can be distinguished from dark current
(or the detector/meter noise floor) by either turning
and covering the detector face with opaque material such
rubber.

Using the human hand to cover the detector is not advised because it emits a
significant amount
cantly different from ambient. With the detector covered, a reading of the
dark current may be made. Next, remove the material which
detector and take another reading. The difference is the ambient light level.

and

Stray

Light

off

or blocking the source

as

a piece

of

infrared radiation and radiates a temperature signifi-

is

covering the

of

black

NOTE

Changes in ambient light levels can occur from such factors

off,

lights on or
your detector element, then your detector can

or by moving people or equipment. Remember, if you can

see

the light bouncing

as

turning room

off

see

you.

The effects
signal input to the detector.
using an attenuator will often improve the signal to ambient signal noise level.
Wavelength-specific filters, such as optical cutoff, bandpass, or spike filters
can be used
reduce stray light include using apertures, placing the detector in a box or
other housing to shield the surface from light (or air currents) and turning
room and other polluting light sources.

3.6.4 Common Measurement

The most common sources of optical measurement error are listed in Table
below. Other common errors are discussed in the preceding subsections
Section

Type of Error
Radiometry

Ambient Light

Wavelength Calibration

of

ambient light are greatly reduced when using a fiberconnectorized

If

free-space beam measurements are desired,

if

the signal wavelength spectrum permits. Other techniques to

Errors

3.10,

Measurement Considerations.

Table

19

-

Common Measurement

What should be done?
Check that all

the detector.
Check that any ambient light was ZEROed

before the measurement was made.
Check that the Calibration Factor for the

measurement wavelength is properly set.

of

Errors

the light

is

actually hitting

off

19

of

Detector Saturation Check that the optical power density remains
or Damage
threshold.

below the detector's saturation or damage

NOTE

The Model
saturation or damage threshold by displaying "SA in the measurement
display area. Be aware that detectors often experience local saturation or
damage without ever exceeding an overall saturation or damage threshold.

This only applies to semiconductor photodiodes used above maximum
intermittent power.

Detector damage can still arise even when

follow your detector manual's user guidelines.

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28324

will indicate when a detector is being operated above its

is

"SAW

29

not displayed. Be sure to

Section

4

Computer Interfacing

General Guidelines

The

port conforms with the IEEE Standard

488.2

as possible to the IEEE
As

specified by the IEEE
independent commands and device dependent commands. The device
independent commands have the same meaning to all devices and

as part of the lEEE
with an asterisk
asterisk and have meanings unique to the Model

mand that invokes a response from the meter. All queries are terminated by a

question mark

response to that query be read before other commands are issued. When a

query
checked by means of a serial poll to make sure that the data is available
before reading the response. (See Appendix

2832C

has two computer interface ports: GPlB and

488.1

software standard. The protocol for the

488.2

software standard.

488.2

standard, there are two command types; device

488.2

standard. All device independent commands start

(').

Device dependent commands do not start with an

(?).

It

is

recommended that when a query is made, that the

is

made to the GPlB interface, the

MAV

RS232C.

hardware standard and the lEEE

RS232C

bit in the status byte should be

C.4

Status Byte)

port conforms

28324.

A query is a com-

The GPlB

as

much

are

defined

Computer Interface Terminology

Listed below are key abbreviations and concepts used in the command
reference section of this manual.

<...>

Delimiting Punctuation

For the purposes of this manual, any string enclosed by
be a command, a string or a numerical argument. The punctuation
used to symbolize the typographic limits of the command, string or argument
in question.

<EOI>

An

IEEE

clST>

This status is generated by the status byte and parallel poll enable register. It

is used in responding to parallel polls.

End

or

488.1

signal sometimes sent with the endaf-string character.

Individual

Identify

Status

<....>

is considered to

<....>

is

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<CR> Carriage Return

The ASCII encoded byte 13 in decimal. (OD hex)

<LF>

Line Feed

The ASCII encoded byte 10 in decimal. (OA hex)

<NL>

New Line

Defined in the IEEE 488.2 standard as the ASCII encoded byte 10 in decimal.

(OA hex)

<END> End of

Message

Indicates the concurrent transmission of <EOI> with the a <NL> data byte.

Q

Semicolons

Used to separate commands within a single transmission

(concatenation).

<number> Numerical Types

Numerical parameters are passed and returned

as

the actual ASCII characters
in the string representation of the number. See the appendix for a detailed
description of <number>.

<string> String Types

See the appendix for a detailed description of <string>

RS232C

Command Termination

When a command

is

received from the R.5-232C port,

either a <CR> or a <LF> is treated as the command terminator.

GPIB Command Termination

When a command is received from the GPIB port, either an <E01> with a data

byte, <NL>, or <CR> is treated as the command terminator. The recom­mended form of termination is an

<EOI> sent with

a

<NL> denoted

as

<END> in

this manual.

RS232C Response Termination

In R.5-232C echo mode responses are terminated by a <CR><LF> sequence. In

RS232C normal mode the <NL> character terminates the response.

GPIB Response Termination

All responses from the 2832-C GPIB port are terminated by an <END>

se

quence. Which

is

the concurrent transmission of <EOI> with a <NL> data byte.

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Entering Remote Computer Interface Mode

RS232C Communication

When a command or query

the 2832-C automatically goes into remote interface mode. When the meter is
in the remote mode, the right-most character of the secondary channel

display area will display an asterisk,

is

received by the GPIB or RS232 interface ports,

>[

.

The local-lockout mode is designated

-

by displaying
While in remote mode, the keypad

<(LOCAL)> key. To get out of remote mode press the <(LOCAL)> key.
2832-C is in local lockout then the LLO remote command must be used to
disable local lockout before you will be able to return to keypad control.

The message area

l>i(l

at the right side

-

of

the display will indicate when'the keypad is in local

of

the secondary channel display area.

is

disabled except for the power and

If

the

-

lockout state by displaying as the right-most character.

Before communicating with the 2832-C through the RS232 port, proper cable
connections must be made. Figure 10 shows the cable connections for
communicating with the RS232C port on the 28324.

Once cable connections are made, the baud rate and echo mode need to be
set. Valid baud rates are
bits, and stop bits are fixed at no parity,

-

19.2K, 9600,4800,2400, and 1200. The parity, data
8

data bits, and 1 stop bit.

RS232C

Baud Rate
Parity none
Data bits
Stop bits 1
When the echo mode

new line and all characters sent to the 2832-C are echoed back over the
interface. Error messages are reported over the interface immediately.
user
(sending an ASCII decimal 08 code) or by using the DEL key (sending
decimal 127 code).

In echo mode the
dumb terminal type

When echo mode
prompt or echo characters back over the interface. Error messages must be
accessed by using the

Parameters

19.2K, 9600,4800,2400, or 1200

8

is

enabled the 283242 generates a

is

entering commands the line may be edited by using the backspace key

RS232C port

of

device

is

disabled (normal mode) the 2832-C does not generate

*ERR?

is

interactive and especially useful when a

is

used to communicate with the 28324.

query. This

is

the default state

'>

'

prompt for every

of

the echo mode.

an

As

ASCII

a

the

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TO 2832 TO COMPUTER

CABLE TERMINATORS (RS-232)

9

pin

to

25

pin

25

.

9

PIN

-

PIN NO.

TO 2832 TO COMPUTER

CODE

DCD

RXD

TXD

DTR

GND

DSR

RTS

CTS

R

DESCRIPTION

CARRIER DETECT

RECEIVE DATA

TRANSMIT DATA

DATA TERM. READY
SIGNAL GROUND
DATA SET READY
REQUEST TO SEND
CLEAR TO SEND
RlNG IND.

I

PIN

PIN NO.

CABLE TERMINATORS (RS-232)

9

pin

to

9

pin

9

PIN

PIN NO.

1

2

3

4

5

6

7

8

9

Figure

4.4.1

--+

10

-

RS232

Setting

PIN NO.

9

;ODE

DCD

RXD

TXD

DTR

GND

DSR

RTS
CTS

R I

DESCRIPTION

CARRIER DETECT

RECEIVE DATA
TRANSMIT DATA
DATATERM. READY
SIGNAL GROUND
DATA SET READY

REQUEST TO SEND
CLEAR TO SEND

RING IND.

Cable Connections

Baud Rate and Echo Mode From The Keypad

The baud rate and echo mode are set from within the menu structure. To set
the baud rate select the BAUD RATE option from the REMOTE SETUP menu.
To set the echo mode select the ECHO MODE-n option from the REMOTE
SETUP menu. (See Section 2.4.1 1)

4.4.2

Setting

Baud Rate and Echo Mode From A Remote Interface

The baud rate cannot be set from the remote interface. To set the echo mode
use the ECHO command. Use the ECHO? to see

the echo mode

is

enabled or

if

disabled. (See Section 2.4.1 1)

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RS232C

XON/XOFF

Handshaking

Protocol

GPIB Communication

The 2832-C uses the XON/XOFF handshaking protocol. When the 2832-C'~

232 input buffer is nearly full the 2832-C will send an XOFF (ASCII encoded 19

decimal) character to the remote computer. The XOFF character informs the
remote computer that it needs to suspend transmission until it receives the
XON character from the
will send an XON (ASCII encoded 17 decimal) to signal the remote computer

that it can resume transmission.
The 2832-C will also respond to XOFF and XON characters sent to it from the

remote computer. When the 2832-C receives an XOFF character it will sus-

pend all transmission of characters to the remote computer until the XON
character is received.

A variety of third party GPIB communication hardware and software, such

plug-in GPlB computer boards and Lab View software from National Instru­ments exists. The 2832-C should work with any of these as long as they
adhere to the

with one of these third party hardware/software packages. The table below
summarizes the lEEE 488.1 capabilities supported by the 2832X.

Description Command Level of Capability

Source Handshake

Acceptor Handshake
Talker

Extended Talker

Listener

Extended Listener

Service Request

Remote Local

Parallel Poll

Device Clear

Device Trigger

Controller

lEEE 488.1 standard. This manual assumes the user is familiar

Table

2832-C. When the buffer empties sufficiently the 28324

20

-

Model

2832C

SH

AH

T6

TEO

L4
LEO
SR
RLO
PP 1

DC
DTO

co

1

1

1

1

IEEE

488.1

Capabilities Summary

complete capability

complete capability
basic talker, serial poll, unaddress if MLA
no capability
basic listener, unaddress if MTA
no capability
complete capability
*no capability
remote configuration
complete capability
no capability
no capability

RS

as

NOTE

In order to better handle the RS232C interface the 2832-C automatically

goes into remote mode when a command is received from either of the

is

remote computer interfaces. The
the local lockout state.

4.6.1

Before communicating with the 2832-C GPlB port the 2832-C GPIB address
must be set. The address can be between 0 and 30. The address can only be
set from the keypad and is accessed through the menu structure. To set the
GPIB address select the REMOTE

The Model 2832-C GPlB

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Setting

The

GPIB

is

factory set to

LLO command

Address

SETUP->GPIB ADDRESS option in the menu.

5.

(See Section 2.4.1 1)

used to enable or disable

Section

5

Command

Reference

Model

283X

Remote Interface Commands

The Model 2832-C remote commands can be divided into two groupings:

i.

Device lndependent Commands, Section 5.2

ii. Device Dependent Commands, Section 5.3

Table 21 lists the Device lndependent Commands supported by the 28324

while Table 22 lists the Device Dependent Commands supported the 2832-C.

Following these tables are the detailed presentations of each command and its
syntax and an example of its use.

Table

21

-

Device lndependent Stalus Commands

Command Command Name

*CAL?
*CLS

ERR?
*ESE
*BE?

*ESR?
*IDN?

IST?
*OPC
*OPC?
*PRE
*PRE?
*RCL
*RsT
*SAV
*SRE

*SRE?
*STB?
*TST?

*WAl

Calibration Query
Clear Status
Error Query
Event Status Enable
Event Status Enable Query

Event Status Register Query
Identification Query
lndividual Status Query
Signal When Operation Complete
Operation Complete Query
Parallel Poll Enable
Parallel Poll Enable Query
Recall Device Configuration
Software Reset
Save Device Configuration

Service Request Enable
Service Request Enable Query

Status Byte
System Test
Wait To Continue

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Table

22

-

Device Dependent Commands

Command Command Name
AITN-n

ATTN-n?
AITNSN-n?
AUTO-n
AUTO-n?

BARGRAPH
BARGRAPH?
CALDATE-n?
CH?

DETMODEL-n?
DETSN-n?
DISP
DISP?
DISPCH
DISPCH?
DS-n?

DSBUF-n
DSBUF-n?
DSCLR-n
DSC NT-n?
DSE-n
DSE-n?
DSSIZE-n

DSSIZE-n?

DSUNITS-n?

ECHO
ECHO?
EVENT?
EVENTEN
EVENTEN?
EXT
EXT?

EXTEDGE

EXTEDGE?

FILTER-n
FILTER-n?
LAMBDA-n
LAMBDA-n?
LO
LLO?

MODE-n
MODE-n?

R

?

R-n?
RANGE-n

Attenuator Calibration Data Enable
Attenuator Calibration Data Enable Query
Attenuator Serial Number Query
Auto Ranging Enable
Auto Ranging Enable Query

Bar Graph Enable
Bar Graph Enable Query
Calibration Date Query
Available Channel Query
Detector Mode Query
Detector Serial Number Query
Display Brightness Select
Display Brightness Query
Display Channel Select
Display Channel Query

Data Store Value Query
Data Store Buffer Behavior Select
Data Store Buffer Behavior Query
Data Store Clear
Data Store Value Count Query

Data Store Enable

Data Store Enable Query

Data Store Buffer Size Select
Data Store Buffer Size Query
Data Store Units Query

RS232 Echo Mode Enable
RS-232 Echo Mode Enable Query

Device Event Register Query
Device Event Enable Register
Device Event Enable Register Query
External Trigger Enable
External Trigger Enable Query
External Trigger Edge Select
External Trigger Edge Query

Filter Select
Filter Query
Lambda Select
Lambda Query
bcal Lockout Enable
Local Lockout Enable Query
Acquisition Mode Select
Acquisition Mode Query
Read Both Channel Measurements Query
Read Single Channel Measurement Query
Manual Range Level Select

36

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Command Command Name
RANGE-n?

REFSEL-n

REFSEL-n?
RESP-n?

RUN

RUN-n
RWS?
RWS-n?

SFREQ

SFREQ?
SPEC
SPREC?
STMAX-n?
STMEAN-n?
STMIN-n?

STMXMN-n?
STSDEV-n?
STSIZE-n
STSIZE-n?
STOP
STOP-n
STOREF-n

STOREF-n?
STOZERO-n
TRIGOUT
TRIGOUT?
TRlGOUTFREQ
TRIGOUTFREQ?
TRlGOUTLVL
TRIGOUTLVL?

TRlGOUTPOL
TRIGOUTPOL?
UNITS-n
UNITS-n?
USRCAL-n
USRCAL-n?
USRREF-n
USRREF-n?

USRRESP-n

USRRESP-n?
ZERO-n
ZERO-n?
ZEROVAL-n?

Manual Range Level Query
Reference Source Select
Reference Source Query
Responsivity Query
Start Both Channel Acquisition
Start Single Channel Acquisition
Read Both Channel Measurements with Status Query

Read Single Measurement with Status Query

DC Sample Frequency Select

DC Sample Frequency Query
DC Sample Type Select
DC Sample Type Query
Statistics Buffer Maximum Value Query
Statistics Buffer Mean Value Query
Statistics Buffer Minimum Value Query
Statistics Buffer Maximum-Minimum Value Query
Statistics Buffer Standard Deviation Query
Statistics Buffer Size Select
Statistics Buffer Size Query
Stop Both Channel Acquisition
Stop Single Channel Acquisition
Store Reference Reading

Store Reference Query Reading
Store Zero Signal
Trigger Out Mode Select
Trigger Out Mode Query
Trigger Out Frequency Select
Trigger Out Frequency Query
Trigger Out Level Select
Trigger Out Level Query
Trigger Out Polarity Select
Trigger Out Polarity Query

Units Select
Units Query
User Calibration Enable
User Calibration Enable Query
User Defined Reference Value Select
User Defined Reference Value Query
User Responsivity Factor Select

User Responsivity Factor Query
Signal Zeroing Enable
Signal Zeroing Enable Query
Zero Signal Query

NOTE

n stands for A (channel

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3

7

A)

or B (channel B).

Device Independent Commands

'CAL?

Calibration Query

Syntax:

Parameters:

*CAL?

None

Function:

This routine performs an auto calibration sequence on both channels. The

calibration sequence measures the amplifier
measurements are stored and subtracted from subsequent measurements.
Acquisition is suspended during auto calibration and no other remote commands

be

processed until the auto calibration sequence is complete.

will
Returns: <number>

<number> represents the integer

is

autocalibration
Related Commands: None

complete.

0.

offsets

This return value is generated when

at all gain settings. These

'CIS

Clear Status
Syntax:

*CIS

Parameters: None

Function:

This command clears the Standard Event Status register, device event register, and
the error queue.
the message available bit @it
and output buffers the MAV bit will not
cancels any outstanding *OPC and OPC? commands.

As

a result

of

this command the status byte

4).

Because this command does not clear the input

be

affected. The *CLS command also

is

cleared except for

Related Commands:

*ESR?, EVENT?, *IST?,

*

STB?

'ERR?

Error Query
Syntax:
Parameters:

Function:

Returns (and removes) oldest error message from the error queue. The error
message
the Appendix B). A maximum of

*ERR?

None

is

made up of an error code and a text description

10

errors can be stored in the queue.

of

the error

(see

If

no

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errors are stored in the queue, a message to that effect will be returned.

Errors that occur due to commands and queries sent from the
face will be stored in the queue only if the echo mode
echo mode

is

enabled the error messages are automatically returned to the

is

-232

inter-

disabled. When the

user when the error occurs. See Appendix B for a description of the error
messages. The command

*CLS will clear the error queue.

Returns: <errno>,<description>

<errno>

<description>

See

is

of

type

aumber> and represents a negative integer error code.

is

of type <string>

in

double quote format, and describes the error.

the appendix for a list of possible error

messages.

Related Commands: *CLS. *STB?

*ESE

Event Status Enable

*ESE

Syntax:

<mask>

Parameters:

<mask>
<mask>

is

an integer in the range 0 to

is

written to the Event Status Enable register

255

inclusive.

Function:

The Event Status Enable register is AND'ed with the Event Status register.
any bit

is

set in the result of this AND'ing operation the ESB bit @it

5)

Status Byte will be set. The Status Byte can be used in conjunction with the
Service Request Enable register to generate a service request.

is

an

8

The Event Status Enable register

1

in the Event Status Enable Register allows the corresponding bit in the Event

Status Register to set the ESB bit @it

bit, bit mapped register. Any bit set to

5)

in the Status Byte. Any bit set to

disables the corresponding bit in the Event Status Register from setting the

ESB bit. The Event Status Enable register

is

set to 0 upon power-up. See

Appendix C for a detailed description of the Event Status Register.

If

of

the

0

The significance of each bit in the Event Status Enable register is shown

below:

7654321

O-

Operation Complete Mask

Request Control Mask (Not Used)
Query Error Mask
Device Enor Mask
Execution Error Mask

Command

Enor Mask
User Request Mask (Not Used)
Power On Mask (Not Used)

Event Status Enable Register

Related Commands: *CLS, *ESE?, *ESR?, EVENT?,
EVENTEN, EVENTEN?, *]ST?, *PRE, *PRE?, *SRE, *SRE?, *STB?

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*BE?

Event Status

Enable

Query

Syntax:

Parameters:

*ESE?

None

Function:

This query returns the contents of the Event Status Enable register. See the

*ESE command for a description of the Event Status Enable register. See

Appendix C for a detailed description of the Event Status Register.

Returns:

<mask>
to

255.

Related Commands:

<mask>

is

of type <number> and represents an unsigned integer in the range

'CLS, 'ESE, 'ESR?, EVENT?, EVENTEN, EVENTEN?,

'IST?, 'PRE, 'PRE?, 'SRE, 'SRE?, 'STB?

*BR?

Event Status Register Query

Syntax:

Parameters:

*ESR?

None

Function:

This query returns the contents of the Event Status Register and clears the
Event Status Register except for bit
Device Event and Device Event Enable registers. The 'CLS command will also
set this register to

0.

3.

Bit

3

is

determined by the state of the

0

The Event Status register
any bit

is

set in the result of this AND'ing operation the ESB bit @it

is

AND'ed with the Event Status Enable register.

5)

If

of the
Status Byte will be set. The Status Byte can be used in conjunction with the
Service Request Enable register to generate a service request. See Appendix C
for a detailed explanation of the Event Status Register.

is

The Event Status Register

an 8 bit, bit mapped register, with each bit signify-

ing a different condition. The bits are listed below, most significant bit first:

Oh

Operatloncomplete
Request Control (Not Used)
Query Enor
Devlce Enor
Execution Error
Command Error
User Request (Not Used)
Power

On

(Not Used)

Standard Event Status Register

Returns:

<value> is of type <number> and represents an unsigned integer in the range

to

255.

<value>

0

Related

Commands:

*CLS,

*BE, 'ESE?, EVENT, EVENTEN, EVENTEN?, 'KT?,

'PRE, 'PRE?, 'SRE, 'SRE?, 'STB?

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*

IDN?

Identification Query

Syntax:

Parameters:

*IDN?

None

Function:

This query causes the

information returned is manufacturer, model, serial number, and firmware

version.

Returns:
<manufacturer>

always returns Newport Corp.
<model>
<serial> is of type <string> using the no quotes format. This is always a '0'.
<version>

the internal firmware version of the
separated by two underscores. The first section
second is the revision date.

Related Commands: None

~manufacturer~,~modeI~,~serial~,~version~

is

of type <string> using the no quotes format.

is

of type <string> using the no quotes format. This text identifies

2832-C

is

of type <string> using the no quotes format. The

to return device identification information. The

2832-C.

This text consists of two sections,

is

the revision level, and the

2832-C

*ST!

Individual Status Query
Syntax:
Parameters:

*IST?

None

Function:

This query returns the current state of the IEEE

<]ST> local message. The <]ST> message

If

status system.
set in the Parallel Poll Enable register, then the <IST> message
value of

When a parallel poll

the <]ST> message

then the configured data line will be driven true in response to the parallel

poll.

Both the

by the IEEE

Returns: <sbit>

<sbit> is of type <number> which represents the integer 0 or

Related Commands:

1).

<S BIT> and the data line driven during a parallel poll can be selected

any bit

Otherwise the <]ST> message

488.1

parallel poll remote configuration command.

is

set in the Status Byte and it's corresponding bit is

is

conducted with the

is

compared to the 4 BIT> (sense bit).

*PRE,

*PRE?, *STB?

488.1

is

generated by the parallel poll

is

set true (a

is

set false (a value of 0).

2832-C

configured to respond to it,

If

they are the same

1.

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*OPC

Signal When Operation Complete
Syntax:
Parameters:

'OPC

None

Function:

This command provides a means of synchronizing operations between the

2832€

the Event Status register to
This bit will remain

This command can be used in conjunction with the 'ESE and 'SRE commands

to cause a Service Request on the GPlB bus when all pending operations are
complete. Once the
complete bit to

Related Commands: 'ESE, 'ESE?, 'ESR?, 'OPC?, 'SRE, 'SRE?, 'STB?, 'WAI

and the host. This command sets the Operation Complete bit @it

1

when all pending operations have completed.

1

until cleared by the 'CIS command or the 'ESR? query.

'OPC command is received, it will not set the operation

1

while any of the following operations are in progress:
Single acquisition in progress
Data store enabled with fixed data store buffer
The meter

is

ranging

0)

of

OPC?

Operation Complete Query
Syntax:

'OPC?

Parameters:

None

Function:

This query provides a means of synchronizing operations between the
and the host. This command generates a response when all pending opera-

tions have completed.

When all pending operations are complete, this query will cause the Message

Available bit @it
generated. By enabling bit
the 'OPC? query can be used to cause a Service Request on the GPlB bus

when all pending operations are complete.

Once the
any of the following operations are in progress:

The 'CIS or

cancel the operation complete query.
Returns:

The response is generated when all pending operations are complete.

'OPC? query

Single acquisition in progress

Data store enabled with fixed data store buffer

The meter is ranging

1

4) of the Status Byte to be set because
4 of the Service Request Enable register

is

received, the response will not be generated while

'RST

commands, as well as a GPIB interface device clear, wiIl

of

the response

(see

28324

'SRE),

Related Commands: 'OPC, 'SRE, 'SRE?, 'STB?, 'WAI

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*PRE

Parallel Poll Enable

*PRE

Syntax:

<mask>

Parameters:

<mask>

is

is

an integer in the range 0 to

written into the Parallel Poll Enable register.

255

inclusive. The value of this number

Function:

This command sets the Parallel Poll Enable register bits. The Parallel Poll
Enable register
(Individual Status) message. See Appendix
Event Status Register.

The Parallel Poll Enable Register
Enable Register is an Sbit, bit mapped register, with each bit signifying
different condition. The bits and their significance are detailed below:

is

used in conjunction with the Status Byte to generate the IST

C

for a detailed description of the

is

set to 0 at power-on. The Parallel Poll

a

7654321

1

/ /

I

(

Parallel Poll Enable Register

1

O-

New Data Available

:4eyU:;

Data Available

Not Used
Message Available Mask
Event Status Byte Mask
Master Summary Status Mask
Error Queue Mark

Related Commands: *]ST, *PRE?, *STB?*PRE?

*

PRE?

Parallel Poll Enable Query

Syntax:

Parameters:

*PRE?

None

Function:

This query returns the contents of the Parallel Poll Enable register. See the
*PRE command for a description of the Parallel Poll Enable register. See

C

Appendix

Returns: <mask>
<mask> is

to

255.

Related Commands: *]ST, *PRE, *STB?

for a detailed description of the Event Status Register.

of

type <number> and represents an unsigned integer in the range

0

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'RCL

Recall

Meter Configuration

Syntax:

<config> is of type <number> which rounds to an integer in the range 0 to
This number specifies a configuration storage buffer. The number 0 stands for
the default configuration buffer.

*RCL

<config>

9.

Function:

This command configures the meter to a configuration previously stored in
non-volatile memory (see *SAV), or to the default configuration for the

if

attached detector. This command will fail

incompatible with the detector attached to the meter or empty. The param­eters affected by this command are those listed in Table

Returns: None
Related Commands: *RST, *SAV

the requested configuration

8.

is

'ST

Reset
Syntax:
Parametem
Function:

This sets the meter to the default configuration,

attached to it. It also cancels any outstanding *OPC or *OPC? commands.

*RST

None

see

Table

8,

for the detector

Related Commands:

'

SAV

*RCL, *SAV

Save Meter Configuration

*SAV

Syntax:

<config>

Parametels:

<config>
This number specifies a configuration storage buffer.

is

of type <number> which rounds to an integer in the range 1 to

Function:

This command saves the configuration of the meter to the configuration

specified by the parameter. The parameters saved by this command are

those listed in Table
Related Commands: *RCL, *RST

8.

9.

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*sRE

Service Request Enable
Syntax:

*SRE

<mask>

Parameters:

<mask>

is

an integer in the range 0 to

255

inclusive. The value of this number

is written into the Service Request Enable register.

Function:

The Service Request Enabled Register

is

used in conjunction with the Status

Byte to generate service requests on the CPlB bus. See Appendix

C

for a

detailed description of the Event Status Register.

If

a bit is set in the Service Request Enable register and it's corresponding bit
is set in the Status Byte Register, then a service request will be generated once
for the for the given event. When service

is

being requested, bit

6

is

set in the

byte returned by a serial poll of the

2832-C.

The Service Request Enable Register

is

an gbit, bit mapped register, with each

bit signifying a different condition. The bits are listed below, most significant

bit first:

'

*

New Data Available CH A
New Valid Data

Available

CH A

New Data Available CH

B

New Valid Data Available CH

B

Message Available Mask
Event Status Byte Mask
Always Zero
Error Queue Mask

Service Request Enable Register

Related Commands:

*SRE?, *STB?

*SRE?

Sewice Request Enable Query
Syntax:

*SRE?

Parameters:

None

Function:

This query returns the contents of the Service Request Enable register.

See

the *SRE command for a description of the Service Request Enabled register.
See Appendix

C

for a detailed description of the Event Status Register.

Returns:

<mask>

<mask> is an integer in the range

0 to

255

inclusive, except that bit

6

is

always

a zero.

Related Commands:

*SRE, *STB?

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*rn?

Status Byte Query
Syntax:

Parameters:

'STB?

None

Function:

This query returns the contents of the Status Byte which records current

system conditions. Appendix C describes the Status Byte in detail.

If

a bit is set in the Status Byte Register and it's corresponding bit is set in the

Service Request Enable Register, then a service request will be generated once

for the given event. When service
returned by a serial poll of the

The Status Byte Register

is

an

ing a different condition. When a bit is set, or has a value of one, then the

is

condition

true. The bits are listed below, most significant bit first:

'

is

being requested, bit

6

is

set in the byte

28324.

&bit, bit mapped register, with each bit signify-

'

OL

New Data Available CH A
New Valid Data Available CH A
New Data Available CH B
New Valid Data Available CH B
Message Available Brl
Event Status Byie Bit
Master Status

Error

Sumrnaly Bii

Oueue Bit

Status Byte Register.

Note that the *CLS common command clears most of the bits in the Status
Byte.

Returns:

<value>

Related Commands:

*

TST?

Self

Syntax:

Parameters:

<value>

is

an integer in the range 0 to

*CLS, *SRE, *SRE?

Test Query

*TSV

None

255

inclusive.

Function:

As

defined in the
to return a result of a self-test, indicating whether or not the unit completed
the self-test without any errors. The self test
or power up. The query does not initiate the self test and only returns a
indicating that the system passed its earlier

Returns:

0

Related Commands:

lEEE

488.2

standard, the 'TST? command causes the device

is

only administered upon reset

self

test.

None

0

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WAI

Wait to continue
Syntax:
Parameters:

*WAI

None

Function:

The *WAI command causes the device to wait until all pending operations are
complete before processing any commands waiting in the input queue. Care
should be taken when using this command since it

input queue by continuing to write commands to the

command
Note that the *WAI command will essentially "lock out" the remote interfaces

until all pending operations are complete. The *OPC command and *OPC?
query differ from *WAI in this area, as they allow other commands to be

processed while they are waiting for pending operations to complete.

Once the

following operations are in progress:

Single acquisition in progress

Data store in progress with fixed data store buffer

The meter

The *WAI command can only be canceled by a GPlB interface device clear or

by turning the meter

is

in effect.

*WAI command

is

ranging

off

and on.

is

received, it will be in effect while any

is

possible to overflow the

2832€

while the *WAI

of

the

Related Commands:

*OPC, *OPC?

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Device Dependent Commands

AITN-n
Attenuator Calibration Data Enable

Syntax:

A-N-n <state>

where n

is

either A or B

Parameters:

The parameter <state>

is

either 0 or

1.

If

<state>

is

0,

then detector

responsivity data is used to calculate readings.

It

<state> is

1,

then the detec-

tor

+

attenuator responsivity data is used to calculate readings.

Function:

This command enables or disables the use of attenuator responsivity data
when user calibration

is

disabled.

If

enabled, responsivity data collected with

the attenuator attached to the detector

is

used in data calculations.

If

dis­abled, responsivity data collected with the detector alone is used in data
calculations.

This command will generate

an

error if the attached detector does not sup

port an attenuator.

Related

Commands:

A'ITN-n?, A'ITNSN-n?, LAMBDA-n,

ATIN-n?
Attenuator Calibration Data Enable Query

Syntax:

A-N-n?

where n

is

either A or B

Parameters:

None

Function:

This query returns a value showing whether or not attenuator responsivity
data will be used when user calibration

is

disabled.

Returns:

<state>

<state>

is

of type <number> which represents the integer

0

if

detector

responsivity data

is

being used or 1 if detector + attenuator responsivity data

is

being used.

Related Commands:

A'ITN-n, A'ITNSN-n?, LAMBDA-n, LAMBDA-n?,

RESP-n?, USRCAL-n, USRCAL-n?, USRRESP-n, USRRESP-n?

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AlTNSN-n?
Attenuator

Serial

Number Query

Syntax:

Parameters:

AlTNSN-n?

where n

is

either A or
None

B

Function:

This query returns the serial number of the attenuator that was calibrated
with the attached detector.

When using an attenuator this serial number must match the serial number of

the attenuator being used or data calculations will be inaccurate.

Returns: <attnSN>

<attnSN>
If

no attenuator serial number is available, the query returns an empty double

quoted string,

Related Commands: CALDATE-n?, DETMODEL-n?, DETSN-n?

is

of type <string> in the double quote format.

"".

AUTO-n
Auto Ranging Enable

Syntax:

AUTO-n <state>

is

where n

either A or

B

Parameters:

The parameter <state> is either 0 or

If

enabled.

<state> is 1 then auto ranging is enabled.

1.

If

<state>

is

0

then manual ranging is

Function:

This command enables or disables auto ranging.
ous acquisition mode, a signal range
signal.

Related Commands: AUTO-n?, RANGE-n, RANGE-n?

If

disabled, the meter needs to be manually ranged.

is

automatically selected to suit the input

If

enabled and in a continu-

AUTO-n?
Auto Ranging Enable Query

Syntax:

Parameters:

AUTO-n?

where n

is

either A or
None

B

Function:

This query returns a value showing whether the auto ranging feature is
enabled or disabled.

Returns: <state>
<state>

disabled or

when in continuous acquisition modes.

is

of type <number> which represents the integer 0 if auto ranging is

1

if

auto ranging is enabled.

If

enabled, the meter will auto range

Related Commands: AUTO-n, RANGE-n, RANGE-n?

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BARGRAPH

Bar

Graph Enable

Syntax:

BARGRAPH <state>

Parameters:

The parameter <state> is either 0 or

If

disabled.

<state> is 1 then the bargraph

1.

If

<state> is 0 then the bargraph is

is

enabled.

Function:

This command enables or disables the bargraph feature.

bargraph will be displayed when the units of measurement are not ratio type

of units and the meter
Related Commands: BARGRAPH?

is

not in INTC mode.

If

enabled, the

BARGRAPH?

Bar

Graph Enable Query

Syntax:

Parameters:

BARGRAPH?

None

Function:

This query returns a value showing whether the bargraph is enabled or

disabled. Note: The bargraph
mode regardless of enabled status.

Returns: <stater

is

not displayed while in either GPIB or

RS232

<state>
disabled and 1 if the bar graph

Related Commands: BARGRAPH

is

of type <number> which represents the integer

is

enabled.

0

CALDATLn?
Calibration Date Query

Syntax:

Parameters:

CALDATE-n?

where n is either A or B

None

Function:

This query returns the calibration date of the detector
memory module attached to the

Returns: <date>

is

<date>
Related Commands: ATTNSN-n?, DETMODEL-n?, DETSN-n?

of type <string> in the double quote format.

2832-C.

as

read from the

if

the bar graph

is

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CH?

Available Channel

Query

Syntax:
Parameters:
Function:
This query

nel
powerup and passed the self test.

Returns: <channels>
<channels>

of <string> are:

"A"

"B" -only channel B
"AB

Related Commands: None

DnMODELn?
Detector Model

Syntax:

CH?

None

is

used to see which channels are available in the meter. A chan-

is

available

-

only channel

-

Both channel A and B are available

if

a calibration module was plugged into that channel on

is

of type <string> in the double quote format. The possible values

A

is

available

is

available

Query

DETMODEL-n?

where n

is

either A or B
Parameters:
Function:
This query returns the model number of the detector that belongs to the

memory module attached to the specified channel.
Returns:
<model>

Related Commands: A7TNSN-n?, CALDATE-n?, DETSN-n?

DEISN-n?
Detector

Syntax:

where n is either A or B
Parameter:
Function:
This query returns the serial number of the detector that belongs to the

memory module attached to the specified channel.
This serial number must match the serial number of the detector attached to

the

28324.

Returns: <detSN>

None

<model>

is

of type <string> in the double quote format.

Serial

Number Query

DETSN-n?

None

<detSN>

Related Commands: ATTNSN-n?, CALDATE-n?, DETMODEL-n?

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is

of type <string> in the double quote format.

DISP
Display Brightness

Syntax:

DISP <level>

Parameters:

The parameter <level>

0

to

3.

0

range

corresponds to off, 1 to dim, 2 to normal, and 3 to bright.

is

of type <number> which rounds to

an

integer in the

Function:

This command sets the brightness of the display to a desired level. The valid

levels are off, dim, normal, and bright.

Returns:
Related Commands:

None

DISP?

Dm?
Display Brightness Query

Syntax:

Parameters:

DISP?

None

Function:

This query returns the brightness level

Returns:

<level> is of type <number> where
and

<level>

3

to bright.

of

the display.

0

corresponds to off, 1 to dim, 2 to normal,

Related Commands:

DISP

DISPCH
Display Channel Select

Syntax:

DISPCH <channel>

Parameters:

<channel>
The possible values

is

of type <string> in a double quoted format.

of

<channel> are

"A

for channel A and

"B"

for channel

B.

Function:

This command is used to select the channel that is displayed in the primary

If

display area of the meter.
command will cause an error.

Returns:

None

Related Commands:

the requested channel

CH?, DISPCH?

is

not available then this

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DISPCH?
Display Channel Query

Syntax:

Parameters:

DISPCH?

None

Function:

This command
display channel.

Returns: <channel>

<channel>
<channel> are

Related Commands: CH?, DlSPCH

is

used to

is

of

type <string> in a double quoted format. The possible values

"A"

for channel A and

see

which channel

"B"

for channel

is

currently selected as the

B.

of

DS-n?
Data Store Value Query

Syntax:

where

DS-n? <number>

n

is

either A or

B

Parameters:

The parameter <number> rounds to an integer and represents the data store

is

value that

number

of 1 represents the oldest data value in the data store, 2 the second oldest and

SO

on.

being queried. The range

of

values stored in the data store buffer

of

<number>

is

1

to n; where n

(see

DSCNT-n?). A parameter

is

the

Function:

This query

buffer.
be generated and nothing will be returned. It
DSCNYn? query to determine how many values have been stored in the data
buffer.

Returns: <status>,<number>
<status>

tus> will be

4

and
<number>
Related Commands: DSCLR-n, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n,

DSSIZE-n?, DSUNITS-n?, DSBUF-n, DSBUF-n?

is

used to query an individual data value from the data store

If

the parameter

is

an integer that represents the status

0

for ok, 1 for over range, 2 for detector saturated, 3 for data error

for ranging.

is

a floating point number in the exponential format.

is

out

of

range then an execution error message will

is

recommended to use the

of

the returned value. <sta-

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DSBUF-n
Data Store Buffer Behavior Select

Syntax:

where n

DSBUF-n <state>

is

either A or B

Parameters:

The parameter <state>

data store FIXED BUFFER behavior is enabled. Otherwise, data store SUDE
BUFFER behavior is enabled.

is

of type <number>.

If

the number rounds to 0 then

Function:

This command selects data store FIXED BUFFER or SLIDE BUFFER behavior.
Related Commands: DS-n?, DSCLR-n, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n,

DSSIZE-n?, DSUNITS-n?, DSBUF-n? DS-n

DSBUF-n?
Data Store Buffer Behavior Query

Syntax:

where n

Parameters:

DSBUF-n?

is

either

None

A

or

B

Function:

This query returns a value showing whether data store FIXED BUFFER or

SLIDE BUFFER behavior

is

enabled.
Returns: <state>
<state>

behavior is enabled, or
Related Commands: DS-n?, DSCLR-n, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n,

DSSIZE-n?, DSUNITS-n?, DSBUF-n, DS-n

is

of type <number> and represents an integer

1,

if

data store SLIDE BUFFER behavior is enabled.

0,

if FIXED BUFFER

DSCLkn
Data Store Clear

Syntax:

where n

Parameters:

DSCLR-n

is

either A or B

None

Function:

This command is used to clear the data store buffer.
Related Commands: DS-n?, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n, DSSIZE-n?,

DSUNITS-n?, DSBUF-n, DSBUF-n?

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DSCNT-n?
Data Store Value Count Query

Syntax:

where n is either

Parameters:

DSCNT-n? <number>

A

or

B

None

Function:

This query returns the number of data values stored in the data store buffer.

Returns:

<count>

size of the data store buffer.

Related Commands:

DSUNITS-n?, DSBUF-n, DSBUF-n?

<count>

is

of type <number> and represents an integer in the range of 1 to the

DS-n?, DSCLR-n, DSE-n, DSE-n?, DSSIZE-n, DSSIZE-n?,

DSE-n
Data Store Enable

Syntax:

where n

DSE-n <state>

is

either A or

B

Parameters:

The parameter <state> is a <number> which is either 0 or

data storing

is

disabled.

If

the number

is

1,

data storing is enabled.

1.

If

the number is

Function:

0,

This command enables or disables data storing. Note that data storing cannot

is

be enabled when the data store buffer
enabled. The user must first either clear the data store buffer or enable SLIDE
BUFFER behavior and then enable data storing.

Related Commands:

DSSIZE-n?, DSUNITS-n?, DSBUF-n, DSBUF-n? DS-n

DS-n?, DSCLR-n, DSCNT-n?, DSE-n?, DSSIZE-n,

full and FIXED BUFFER behavior is

DSE-n?
Data Store Enable Query

Syntax:

where n is either

Parameters:

DSE-n?

None

A

or

B

Function:

This query returns a value showing whether or not data storing is enabled or

disabled.

Returns:

<state>
disabled, or

Related Commands:

DSSIZE-n?, DSUNITS-n?, DSBUF-n, DSBUF-n? DS-n

<state>

is

of type <number> and represents an integer

1,

if

data storing

DS-n?, DSCLR-n, DSCNT-n?, DSE-n, DSSIZE-n,

is

enabled.

0,

if data storing is

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DSSIZEn

Data Store Buffer Size Select

Syntax:

where n is either

DSSIZE-n <size>

A

or

B

Parameters:

The parameter <size> is

range

1

to 1000. The parameter represents the size of the data buffer to

used for data storing.

of

type <number> which rounds to an integer in the

be

Function:

This command sets the size of the buffer used for data storing. Note that the

is

data buffer
previously stored data will be gone.

Related Commands:

DSUNITS-n?, DSBUF-n, DSBUF-n?, DS-n,

cleared automatically when this command is used and all

DS-n?, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n?,

DSSIZEn?

Data Store Buffer Size Query

Syntax:

where n is either

Parameters:

DSSIZE-n?

None

A

or

B

Function:

This query returns the data store buffer size.

Returns:

<size>

Related Commands:

DSUNITS-n?, DSBUF-n, DSBUF-n?, DS-n

<size>

is

of type <number> and represents an integer of the range 1 to 1000.

DS-n?, DSCLR-n, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n,

DSUNITS-n?

Data Store Buffer Units Query

Syntax:

where n is either

Parameters:

DSUNITS-n?

A

None

or

B

Function:

This query returns the units of the data stored in the data store buffer.

Returns:

<units>
The possible values of units are:

depending on the detector and 'acquisition mode.

Related Commands:

DSSIZE-n?, DSBUF-n, DSBUF-n?

<units>

is

of type <string> in the double quote format.

"A,

"W,

"W/CMn, "dBmn, "dBn or "RELn

DS-n?, DSCLR-n, DSCNT-n?, DSE-n, DSE-n?, DSSIZE-n,

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ECHO

RS232

Echo Mode Enable

Syntax:

ECHO

<enable>

Parameters:

The parameter <state>

If

disabled.

<state>

is

either 0 or

is

1

then RS232 echo mode is enabled.

1.

If

<state>

is

0

then RS232 echo mode is

Function:

This command enables or disables the echo mode for RS232 communication.

Related Commands:

ECHO?

ECHO?

RS232

Syntax:

Parameters:

Echo Mode Enable Query

ECHO?

None

Function:

This query returns a value showing whether the RS232 echo mode
or disabled.

Returns:

<state>

disabled, or

Related Commands:

<state>

is

of type <number> that represents the integer

1,

if

the echo mode

is

enabled.

ECHO

0,

if the echo mode is

is

enabled

EVENT?

Device Event Register Query

Syntax:

Parameters:

EVENT?

None

Function:

This query returns the contents of the Device Event register and sets the

0.

Device Event register to
The Device Event register

any bit

is

set in the result of this AND'ing operation then Device Error bit @it 3)

in the Standard Event Status register will be set.
The Device Event register

a different condition. The bits are listed below, most significant bit first:

The *CLS command will also set this register to

is

AND'ed with the Device Event Enable register.

is

an

8

bit, bit mapped register, with each bit signifying

Oh

Over Range CH
Saturated CH
Data Error CH
(Not Used)
Over Range CH
Saturated CH
Data Error CH
(No! Used)

A

A

A

B

B

B

0.

If

Device Event Register

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Returns:

<event>

<event>

is

an integer in the range from 0 to

255

inclusive.

Related Commands:

*ESE, *ESE?, *ESR?, EVENTEN, EVENTEN?

EVENTEN

Device Event Enable Register

Syntax:

Parameters:

<mask>

is

written into the Device Event Enable register.

Function:

The Device Event Enable register
any bit

in the Standard Event Status register will be set.

The Device Event Enable register

1

to

Device Event register to set the Device Error bit @it

Status register. Any bit set to

Event register from setting the Device Error bit.

EVENTEN

is

an integer in the range 0 to

is

set in the result of this AND'ing operation then Device Error bit (bit

<mask>

255

inclusive. The value of this number

is

AND'ed with the Device Event register.

is

an

8

bit, bit mapped register. Any bit set

in the Device Event Enable register allows the corresponding bit in the

3)

in the Standard Event

0

disables the corresponding bit in the Device

76543210

Data Error CH
(Not Used)

Over Range CH

Saturated CH
Data Error
(Not Used)

CH

A

B

B

B

If

3)

Device Event Register

Related Commands:

EVENT?, EVENTEN?, *ESE, *BE?, *ER?

EVENTEN?

Device Event Enable Register Query

Syntax:

Parameters:

EVENTEN?

None

Function:

This query returns the contents of the Device Event Enable register. See the
EVENTEN command for a description of the Device Event Enable register.

Returns:

<mask>

range from

Related Commands:

<mask>

is

of type <number> and represents an unsigned decimal integer in the

0

to

255.

EVENT?, EVENTEN, *BE, *EE?, *ESR?

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EXT

External Trigger Enable
Syntax:

EXT

<enable>

Parameters:

The parameter <state>

is

either 0 or

1.

If

<state>

is

0

then the external trigger

is disabled.

If

<state>

is

1

then the external trigger

is

enabled.

Function:

This command enables or disables the external trigger input on the back panel.

Related Commands: EXT?, EXTEDGE, EXTEDGE?

EXI?

External Trigger Enable Query

Syntax:

EXT?

Parameters:

None

Function:

This query returns a value showing whether the external trigger input

is

enabled or disabled.
Returns: <state>
<state>

is

of type <number> that represents the integer

0,

if

the external

trigger input

is

disabled, or

1,

if

the external trigger

is

enabled.

Related Commands: EXT, EXTEDGE, EXTEDGE?

EXTEDGE

External Trigger Edge Select
Syntax:

EXTEDGE

<edge>

Parameters:

The parameter <edge> is either 0 or

1.

If

<edge> is 0 then the external trigger

is defined as a falling edge.

If

<edge> is 1 then the external trigger is defined

as

a rising edge.

Function:

This command defines whether the external trigger input on the back panel

is

falling edge or rising edge active.
Related Commands: EXT, EXT?, EXTEDGE

E?mEDGE?

External Trigger Edge Query

Syntax:

EXTEDGE?

Parameters:

None

Function:

This query returns a value showing which external trigger edge

is

the active edge.

Returns: <edge>

<edge>

is

of type <number> and represents

0,

if

the external trigger

is

defined

as a falling edge, or

1,

if

the external trigger

is

defined

as

a

rising edge.

Related Commands: EXT, EXT?, EXTEDGE

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FlLTER-n
Rlter Select

Syntax:

FILTER-n

<filter>

where

n

is

either A or

B

Parameters:

The parameter <filter>

is

an integer in the range 0 to 3 inclusive. 0 corre-

sponds to no filtering,

1

to analog filter only, 2 to digital averaging filter only,

and

3

to analog and digital filters combined.

Function:

This command selects a filter combination to be used to condition readings
taken from the detector. The choices are to have no filter at all, an analog
filter, digital averaging filter, and both the analog and digital filters. The digital
filter processes every signal reading by averaging it with the last

9

readings

taken.
All detectors signals are filtered to some extent even without the analog filter

feature. By enabling the analog filter the signal

is

filtered by a

5

Hz

low pass

instead of the standard filter.

If

an attempt

is

made to enable the analog filter for a detector that does not

support

it,

an execution error will occur.

Related Commands: FILTER-n?

FILTER-n?

Fdter Query
Syntax:

FILTER-n?

where

n

is

either A or

B

Parameters:

None

Function:

This query returns a value that represents the filter combination currently

being used to condition readings.

Returns:

<filter>

<filter>

is

of type <number> in a range of 0 to 3 with 0 corresponding to no

filter,

1

to analog filter only, 2 to digital averaging filter only, and 3 to analog

and digital filters combined.
Related Commands: FILTER-n

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LAMBDA-n
Lambda Select

Syntax:

LAMBDA-n <wavelengths

where n

is

either A or B

Parameters:

The parameter <wavelength>

is

of type <number> which rounds to an integer

with a range that depends on the detector being used. The units

of

<wave

length> are nanometers and should correspond to the wavelength of the light

source being measured.

Function:

This command

is

used to specify the wavelength

of

light being measured.

This will insure that the proper responsivity calibration point will be used

when the

2832-C

calculates measurement values.

Related Commands:

ATTN-n, ATTN-n?, LAMBDA-n?, RESP-n?, USRCAL-n,

USRCALn?, USRRESP-n, USRRESP-n?

LAMBDA-n?
Lambda Query

Syntax:

LAMBDA-n?

where n

is

either A or B

Parameters:

None

Function:

This query returns the wavelength that corresponds to the responsivity calibra-

tion point currently being used by the

2832-C

in measurement calculation.

Returns:

<wavelength>

<wavelength>

is

of

type <number> and represents

an

integer. The units

of

<wavelength> are nanometers.

Related Commands:

ATTN-n, ATTN-n?, LAMBDA-n, RESP-n?, USRCAL-n,

USRCALn?, USRRESP-n, USRRESP-n?

LLO

Local Lockout Enable
Syntax:

LLO

<states

Parameters:

The parameter <state>

is

either 0 or

1.

If

<state>

is

0

then local lock-out

is

disabled.

If

<state>

is

1

then local lock-out

is

enabled.

Function:

This command enables or disables the local lockout.

Returns:

None

Related Commands:

LLO?

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LLO?
Local Lockout Enable Query

Syntax:

Parameters:

LLO?

None

Function:

The query returns the state

Returns: <state>
<state> is

disabled, or
Related Commands: LLO

of

type <number> and represents the integer

1,

if local lockout

of

the local lockout.

is

enabled.

0,

if local lockout is

MODE-n
Acquisition Mode Select

Syntax:

where n

MODE-n <mode>

is

either A or

B

Parameters:

The parameter <mode> is

attached to the meter. The valid values for this parameter are listed below.

"DCSNGL" specifies DC single mode
"DCCONT" specifies DC continuous mode

of

type <string>. Its range depends on the detector

Function:

This command sets the mode to be used to acquiring subsequent readings.

if

Note that the current units will be changed automatically
compatible with the new mode.

Related Commands: MODE-n?, UNITS-n, UNITS-n?

they are not

MODE-n?

Acquisition Mode Query

Syntax:

where n

Parameters:

MODE-n?

is

either A or

None

B

Function:

This query returns the acquisition mode currently being used by the meter.
Returns: <mode>

<mode>

Related Commands: MODE-n, UNITS-n, UNITS-n?

is

of

type <string> in the double quote format.

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R?

Read Both Channels Measurement Query
Syntax:
Parametem:

R?

None

Function:

This query returns the last valid measurements taken from both channels.
The units of the measurements are the units defined at the time the readings

were made. Because it

ments are actually being taken, the values returned by successive queries may

be multiple reports of a single measurements.
To ensure that fresh data

the Status Byte can be checked either by issuing a serial poll or by using the

'STB? command. A serial poll

The NVDA bit will be

NVDA bit for a specific channel will be reset to

is

queried from that channel and will stay 0 until a new valid reading is taken. A

valid reading

Returns:

or <number>

<number>

If

two channels are running simultaneously then, both are returned separated

by a comma.

is

a reading that would return a status of 0 using the RWS? query.

<number>, <number>

is

a floating point number in the exponential format.

is

possible to make this query faster than measure-

is

being read the NVDA(new valid data available) bit

is

recommended

1

if

the last valid measurement has not been read. The

if

the CPlB interface is being used.

0

immediately after a measurement

in

Related Commands:

UNITS-n, UNITS-n?

'STB?, MODE-n, MODE-n?, R-n?, RWS?, RWS-n?,

R-n?

Read Single Channel Measurement Query

Syntax:

where

Parameters:

R-n?

n

is either

None

A

or

B

Function:

This query returns the last valid measurements taken from the specified channel.

The units of the measurements are the units defined at the time the reading was

made. Because it
actually being taken, the values returned by successive queries may
reports of a single measurements. To ensure that fresh data
NVDA(new valid data available) bit in the Status Byte can be checked either by
issuing a serial poll or by using the

if

mended
valid measurement has not been read. The NVDA bit for the specified channel
will be reset to 0 immediately after a measurement
and will stay
that would return a status of

the GPlB interface

is

possible to make this query faster than measurements are

is

being used. The NVDA bit will be 1 if the last

0

until a new valid reading

0

using the RWS? query.

is

being read the

*STB? command. A serial poll

is

queried from that channel

is

taken. A valid reading is a reading

be

is

recom-

multiple

Returns:

<number>

Related Commands:

UNITS-n?

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<number>

is

a floating point number in the exponential format.

'STB?, MODE-n, MODE-n?, R?, RWS?, RWS-n?, UNITS-n,

RANGE-n

Signal Range Select
Syntax:

where n is either

RANGE-n <ranges

A

or

B

Parameters:

The parameter <range>

depend on the detector and mode being used to acquire data.
entitled "Electrical Specifications" at the beginning of this manual for the
signal range that corresponds to the current setting of

is

of type <number>. The range of this parameter will

See

the section

<range>.

Function:

This command

will disable the auto ranging feature.

Related Commands:

is

used to select a new manual signal range. This command

AUTO-n, AUTO-n?, RANGE-n?

RANGE-n?

Signal Range Query
Syntax:

where

Parameters:

RANGE-n?

n

is

either A or

None

B

Function:

This query returns a value that represents the current signal range setting

is

being used whether the meter
Section

2.3.1

1.

auto ranging or in manual ranging mode.

See

Returns:

<range>
used for either auto or manual ranging. See the section entitled "Electrical
Specifications" at the beginning of this manual for the signal range that
corresponds to

Related Commands:

<range>

is

of type <number> and represents the gain level currently being

<range>.

AUTO-n, AUTO-n?, RANGE-n

-EL-n
Reference Source Select

Syntax:

REFSEL-n <sources

Parameters:

<source> is of type <string> in the double quote format. The possible values

-

of <source> are: "STOREF'
The other channel, "USRREF' - User defined reference value

Last stored reference measurement, "OTHERCH"

Function:

This command
logarithmic (dB) relative measurements. This command will cause an error

an

attempt

available.

Returns:

is

used to select a reference source to be used in linear and

is

made to select the other channel as a reference

None

if

it

is

not

-

if

Related Commands:

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REFSEL-n?, STOREF-n, USRREF-n, USRREF-n?

REFSEL-n?
Reference

Source

Query

Syntax: REFSEL-n?
Parameters: None

Function:

This query returns the current reference source that will be used in linear

and

logarithmic (dB) relative measurements. Returns:

<source>

is

of type <string> in the double quote format. The possible values

of <source> are:

"STOREF"

-

Last stored reference measurement

"OTHERCH"

-

The other channel

"USRREF"

-

User defined reference value

Related Commands: REFSEL-n, STOREF-n, USRREF-n, USRREFn?

RESP-n?

Responsivity

Query

Syntax: RESP-n?

where n is either

A

or

B

Parameters: None

Function:

This query returns the responsivity value currently being used by the

2832-C

in measurement calculation.
Returns: <val>
<val>

is

of type <number> and represents a floating point number. The units
of the responsivity <val> depends upon the type of detector family of the
detector in use. See Table

22

for a listing of responsivity units by detector

family.
Related Commands:

ATN-n, ATN-ri?, LAMBDA-n, LAMBDA-n?, USRCALn,

USRCAL-n?, USRRESP-n, USRRESP-n?

RUN
Start Both Channel Acquisition

Syntax: RUN
Parameters:

None

Function:
This command initiates data acquisition on both channels using the currently

defined acquisition mode. In single type acquisition modes this command will

cause one reading to be acquired. In continuous type acquisition modes this
command will initiate the continuous acquisition of readings. The STOP
command will terminate acquisition.

Related Commands: STOP, STOP-n, RUN-n

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RUN-n
Start Single Channel Acquisition

Syntax:

Parameters:

RUN-n

None

Function:

This command initiates data acquisition on the specified channel using the
currently defined acquisition mode. In single type acquisition modes this
command will cause one reading to be acquired. In continuous type acquisi-

of

tion modes this command will initiate the continuous acquisition
The STOP command will terminate acquisition.

Related Commands: STOP, STOP-n, RUN

readings.

RWS?
Read

Both

Channel Measurements With Status Query
Syntax:
Parameters:

RWS?

None

Function:

This query returns the last measurements taken from both channels. The

of

units
were made. Because it

ments are actually being taken, the values returned by successive queries may

be multiple reports

these measurements are the units defined at the time the readings

is

possible to make this query faster than measure-

of

the same measurement.

To ensure that fresh data is being read the NDA(new data available) bit in the
Status Byte can be checked either by issuing a serial poll or by using the

is

*STB? command. A serial poll
used. The NDA bit will be
NDA bit for a specific channel will be reset to
ment

is

queried from that channel and will stay 0 until a new reading is taken.

Returns: <status>, <number>

<status> is an integer that represents the status of the returned value.
<status> will be

and

4

for ranging.

If

more than one channel

status

of

CHA and CHB respectively.

<number>

Related Commands: *STB?, MODE-n, MODE-n?, R?, R-n?, RWS-n?

0

for ok, 1 for over range, 2 for saturated and 3 for data error,

is

is

a floating point number in the exponential format.

recommended

1

if

the last measurement has not been read. The

available, then the first two numbers represent the

if

the GPlB interface

0

immediately after a measure

is

being

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RWS-n?
Read Single Channel Measurement With

Status

Query
Syntax:
Parameters:

RWS-n?

None

Function:

This query returns the last measurement taken from the specified channel.
The units of this measurement are the units defined at the time the reading
was made. Because it

ments are actually being taken, the values returned by successive queries may

be multiple reports of the same measurement.
To ensure that fresh data

Status Byte can be checked either by issuing a serial poll or by using the

*STB? command. A serial poll

used. The NDA bit will be 1

NDA bit for the specified channel will be reset to 0 immediately after a mea-

is

surement
taken.

Returns:

<status>
<status> will be 0 for ok, 1 for over range, 2 for saturated and
and

4

<number>

queried from that channel and will stay 0 until a new reading is

<status>,<number>

is

an integer that represents the status of the returned value.

for ranging.

is

a floating point number in the exponential format.

Related Commands:

UNITS-n?

is

possible to make this query faster than measure

is

being read the NDA(new data available) bit in the

is

recommended

if

the last measurement has not been read. The

*STB?, MODE-n, MODE-n?, R?, R-n?, RWS? UNITS-n,

if

the CPlB interface is being

3

for data error,

SFREQ

DC

Sample Frequency Select

Syntax:

SFREQ

<freq>

Parameters:

The parameter <freq>
on the current DC sample precision

is

the range
500Hz when two detector calibration modules are plugged into the meter and

1000Hz for one.
Function:
This command determines how often a signal

ous mode. Both channels sample data at the same rate when in DC continu­ous mode.

0.001 to 25Hz.

Related Commands:

is

of type <number>. The range of this number depends

(see

SPREC).

If

the precision

SFREQ?, SPREC, SPREC?

is

If

the precision

4096 then the range

is

sampled when in DC continu-

is

20000 then

is

0.001 to

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SFREQ?
DC Sample Frequency Query

Syntax:
Parameters:

SFEQ?

None

Function:

This query returns the sample rate used for continuous DC acquisition on
both channels

Returns: <freq>
<freq> is of type <number> in exponent notation with units of hertz or samples

per second.
Related Commands: SFREQ, SPREC, SPREC?

SPREC

DC

Sample Precision Select

Syntax:

SPEC

<prec>

Pararne ters:

The parameter <prec>

4096.

is

of type <number> with acceptable values of 20000 or

Function:

The 2832-C has a 20,000 count high precision A/D and a 4,096 count A/D. This
command determines which of these A/Ds will be used from both channels to
acquire samples during DC single and DC continuous acquisition modes. This
command affects the available range of DC sample frequencies.

Note that the 4,096 count A/D
Related Commands: SFREQ, SFREQ?, SPREC?

is

used during all other acquisition modes.

SPREC?
DC Sample Precision Query

Syntax:
Parameters:

SPREC?

None

Function:

This query returns a string that indicates whether the 20,000 count A/D or the

A/D

4,096 count
on both channels.

Returns: <prec>

<prec>

and 4096
Related Commands: SFREQ, SFREQ?, SPREC?

is

if

will be used during DC CONT or DC SNGL acquisition modes

of type <number>. It will be 20000

the 4,096 count A/D is selected.

if

the 20,000 count

A/D

is

selected

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STMAX-n?
Statistics Buffer Maximum Value Query

Syntax:

where n

Parameters:

STMAX-n?

is

either A or

None

B

Function:

This query returns the maximum value in the statistics buffer of the specified
channel.

Returns: <ma>
<maw is of type <number> in exponent notation.
Related Commands: STMEAN-n?, STMIN-n?, STMXMN-n?, STSDEV-n?,

STSIZE-n, STSIZE-n?,

STMEAN-n?
Statistics Buffer Mean Value Query

Syntax:

where n

Parameters:

STMEAN-n?

is

either A or

None

B

Function:

This query returns the mean or average of all the values in the statistics buffer
of the specified channel.

Returns: <mean>

is

<mean>
Related Commands: STM-?. STMIN-n?, STSDEV-n?, STMXMN-n?,

STSIZE-n, STSIZE-n?

of type <number> in exponent notation.

STMIN-n?
Statistics Buffer Minimum Value Query

Syntax:

where n

Parameters:

STMIN-n?

is

either A or

None

B

Function:

This query returns the minimum value in the statistics buffer of the specified
channel.

Returns:

<min> is of type <number> in exponent notation.

Related Commands:
STSIZE-n, STSIZE-n?

<min>

STMAX-n?, STMEAN-n?, STSDEV-n?, STMXMN-n?,

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STSIZEn?
Statistics Buffer Size Query

Syntax:

where n is either

Parameters:

STSIZE-n?

None

A

or

B

Function:

This query returns the statistics buffer size.

Returns: <size>
<size>

is

of type <number> and represents an integer in the range 0 to

Related Commands: STMAX-n?, STMEAN-n?, STMIN-n, STMXMN-n?,

,

STSDEV-n?

STSIZE-n

100.

STOP

Stop Both Channel Acquisition

Syntax:
Parameters:

STOP

None

Function:

This command terminates any acquisition of data currently in progress on

both channels.
has no effect.

Related Commands: RUN, RUN-n, STOP-n

If

data

is

not being acquired on a channel then this command

STOP-n
Stop Single Channel Acquisition

Syntax:

where n

Parameters:

STOP-n

is

either

None

A

or

B

Function:

This command terminates any acquisition of data currently in progress on the

If

specified channel.
has no effect.

Related Commands: RUN, RUN-n, STOP

data is not being acquired on that channel the command

STOREF-n

Store Reference Reading

Syntax:

where

Parameters:

STOREF-n

n

is either

None

A

or

B

Function:

This command takes the latest reading and stores it as a reference reading to
be used when making relative linear and dB measurements. The units of the
reference reading defaults to Watts.

Related

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Commands:

REFSEL-n, REEFLn?, USRREF-n, USRREF-n?, STOREKn?

STMXMN-n?
Statistics Buffer Max-Min Query

Syntax:

where n

Parameters:

STMXMN-n?

is

either A or

None

B

Function:

This query returns the difference between the maximum and minimum

of

readings in the statistics buffer
Returns: <mxmn>

<mxmn>

Related Commands: STMAX-n?, STMEAN-n?, STMIN-n?, STMXMN-n,
STSIZE-n, STSIZE-n?

is

of

type <number> in exponent notation.

the specified channel.

STSDEV-n?
Statistics Buffer Standard Deviation Query

Syntax:

where

Parameters:

STSDEV-n?

n

is

either A or

None

B

Function:

This query returns the standard deviation

buffer

of

the specified channel.

of

the readings in the statistics

<stddev>

Related Commands: STMAX-n?, STMEAN-n?, STMIN-n?, STMXMN-n,
STSIZE-n, STSIZE-n?

is

of

type <number> in exponent notation.

STSrzEn
Statistics Buffer Size Select

Syntax:

where n

STSIZE-n

is

either A or

<size>

B

Parameters:

The parameter <size>

range of

0

to

100.

is

of

type <number> which rounds to

The parameter represents the size

an

integer in the

of

the statistics buffer.

Function:

This command sets the size

of

tics. The contents
The statistics buffer
when the acquisition mode or units are changed.

then the statistics are disabled and no statistical information will be main-

tained.

Related Commands: STMAX-n?, STMEAN-n?, STMIN-n, STSIZE-n?,

STSDEV-n?

this buffer are updated every time a reading

is

of

the buffer used for calculating real-time statis-

is

taken.

cleared automatically when this command is issued or

If

the buffer size

is

set to

0

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STORELn?
Store Reference Reading Query

Syntax:

where n is either

Parameters:

STOREF-n?

None

A

or

B

Function:

This query returns the latest reading stored
of the reference reading defaults to Watts.

Returns:

<number> is a floating point number in the exponential format.

Related Commands:

<number>

REFSELn, REBEL-n?, USRREFn, USRREF-n?, STOREF-n

as

a reference reading. The units

STOZERO-n
Store

Zero

Signal

Syntax:

where n

Parameters:

STOZERO-n

is

either A or

None

B

Function:

This command takes the latest reading and stores it as a zero signal reference

is

value to be used when zeroing
defaults to Amperes.

enabled. The units of the zero reference

Related Commands:

ZERO-n, ZERO-n?, ZEROVAL-n?

TRIGOUT
Trigger Out Mode Select

Syntax:

TRIGOUT <mode>

Parameters:

The parameter <mode> is of type <string>. The valid values for this parameter
are listed below.

"CMPLT specifies conversion complete mode
"FREQ" specifies frequency mode
"LVL" specifies level comparator mode
"OFF specifies off mode

Function:

This command determines in which mode the trigger out output on the back
panel will operate.

Certain modes require additional parameters to be set.

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL, TRIGOUTPOL?

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTFREQ?,

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TRIGOUT?
Trigger Out Mode Query

Syntax:
Parametem:

TFUCOUT?

None

Function:

This query returns the current mode of the trigger out output.

Returns:

<mode>

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL, TRIGOUTPOL?

<mode>

is

of type <string> in the double quote format.

TRIGOUT, TRIGOUTFREQ, TRIGOUTFREQ?,

TRIGOUTRlEQ
Trigger Out Frequency Select

Syntax:

TRIGOUTFREQ

&eq>

Parametem:

The parameter <freq>

to

1000Hz.

is

of type <number>. The range of this number

Function:

This command

TTL OUT line, in trigger out frequency mode.

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL, TRIGOUTPOL?

is

used to set the frequency at which a pulse

TRIGOUT, TRIGOUT?, TRIGOUTFREQ?, TRIGOUTINTG,

is

is

0.001

output, on the

TRIGOUTFREQ?

Trigger Out Frequency Query
Syntax:

Parametem:

TFUCOUTFREQ?

None

Function:

This query returns the trigger out pulse frequency used during trigger out

frequency mode.

Returns:

<freq>

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL, TRIGOUTPOL?

<freq>

is

of type <number> in exponent notation with units

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTINTG,

of

hertz.

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TRIGOUTLVL
Trigger Out Level Select

Syntax:

TRIGOUTLVL

<level>

Parameters:

The parameter <level>
Watts.

is

of type <number>. The units

of

this parameter are

Function:

This command
tor mode. When the power level is at or above this level the trigger out will go
to its active state.

Related Commands:

TRIGOUTLVL?, TRIGOUTPOL, TRIGOUTPOL?

is

used to set the level used by the trigger out level compara-

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTFREQ?,

TRIGOUTLVL?
Trigger Out Level Query

Syntax:
Parameters:

TRIGOUTLVL?

None

Function:

This query returns the trigger out level used by the trigger out level
comparator mode.

Returns:

<level>

<level>

Related Commands:

TRIGOUTLVL, TRIGOUTPOL, TRIGOUTPOL?

is

of type <number> in exponent notation with units of Watts.

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTFREQ?,

TRIGOUTPOL
Trigger Out Polarity Select

Syntax:

TRIGOUTPOL

<state>

Parameters:

The parameter <state> is a <number> which can be 0 or

rounds to
polarity will be active high.

0,

then the polarity will be active low.

If

the number is

Function:

This command

active low or active high.

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL?

is

used to set the polarity of the trigger out output to either

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTFREQ?,

1.

If

the number

1,

then the

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TRIGOUTPOL?
Trigger Out Polarity Query

Syntax:
Parameters:

TRIGOUTPOL?

None

Function:

This query returns a value that indicates whether the trigger out polarity is
active high or active low.

Returns:

<state>

active low, or

Related Commands:

TRIGOUTLVL, TRIGOUTLVL?, TRIGOUTPOL

<state>

is

of type <number> and represents the integer

1,

if

the polarity is active high.

TRIGOUT, TRIGOUT?, TRIGOUTFREQ, TRIGOUTFREQ?,

0,

if the polarity is

UNwn
Units Select

Syntax:

where n

UNITS-n <units>

is

either A or

B

Parameters:

<units>

A subset of these units will

is

of type <string>. All possible values of units are listed below:

"A

"W"
"W/cm" specifies watts/cm2
"dBm" specifies dBm
"dB" specifies dB
"REL" specifies linear ratio

specifies amps
specifies watts

be

valid for a particular detector and acquisition mode.

Function:

Sets the units to be used for subsequent measurements. Once the units have
been set, all new readings are given in the new units.

Related Commands:

MODE-n, MODE-n?, UNITS-n?

UNITLn?
Units Query

Syntax:

where n

Parameters:

UNITS-n?

is

either A or

None

B

Function:

This query returns the units of readings currently being taken.

Returns:

<units>
units are:
and acquisition mode.

Related Commands:

<units>

is

of type <string> in the double quote format. The possible values of

"A,

"W",

"W/cmw, "dBmw, "dB" or

MODE-n, MODE-n?, UNITS-n

"REL"

depending on the detector

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USRCAL-n
User Calibration Enable

Syntax:

where n

USRCAL-n <state>

is

either A

or

B

Parameters:

The parameter <state>
then user calibration
enabled.

is

a <number> which can be 0 or

is

disabled.

If

the number

1.

If

the number is

is

1,

then user calibration

0,

is

Function:

This command enables or disables the use of a user defined calibration point.
Related Commands: ATTN-n, AlTN-n?, LAMBDA-n, LAMBDA-n?, RESP-n?,

USRCAL-n?, USRRESP-n, USRRESP-n?

USRCAL-n?
User Calibration Enable Query

Syntax:

where

Parameters:

USRCAL-n?

n

is

either A

None

or

B

Function:

This query returns a value showing whether or not user calibration is enabled
or disabled.

Returns: <state>

<state>

disabled, or
Related Commands: ATTN-n, AVN-n?, LAMBDA-n, ,LAMBDA-n?, RESP-n?,

USRCAL-n, USRRESP-n, USRRESP-n?

is

of type <number> and represents an integer

1,

if user calibration

is

enabled.

0,

if

user calibration is

USRREF-n
User Defined Reference Value Select

Syntax:

where

USRREF-n

n

is

either A

<vab

or

B

Pararne ters:

The parameter <val>

is

of type <number>.

Function:

This command provides a means of directly storing a reference value to be

of

used in linear and logarithmic (dB) relative measurements. The units
value are Watts.

Related Commands: REFSEL-n, REFSEL-n?. STOREF-n, USRREF-n?

this

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USRREF-n?
User Defined Reference Value Query

Syntax:

USRREF-n?

where n is either

A

or

B

Parameters:

None

Function:

This query returns the user defined reference value. This value will be in
Watts.

Returns: <refval>

<refval>

is

of type <number> in exponential notation.

Related Commands: REFSEL-n, REFSEL-n?, STOREF-n, USRREF-n

USRRESPp
User Responsivity Factor Select

Syntax:

USRRESP-n

<vab

where n

is

either

A

or

B

Parameters:

The parameter <val>

is

of type <number>. The units of this parameter match

the responsivity units of the detector in use.

Function:

This command

is

used to define a responsivity factor that will be used by the

2832-C in measurement calculation when user calibration

is

enabled.

Related Commands: ATTN-n, ATTN-n?, LAMBDA-n, LAMBDA-n?, RESP-n?,
USRCAL-n, USRCAL-n?, USRRESP-n?

USRRFSP-n?
User Responsivity Factor Query

Syntax:

USRRESP-n?

where n is either

A

or

B

Parameters:

None

Function:

This query returns the user defined responsivity factor that will be used by
the 2832-C in measurement calculation when user calibration is enabled.

Returns: <vab

<val>

is

of type <number> and represents a floating point number. The units

of <vab match the responsivity units of detector in use.

Related Commands: ATTN-n, ATTN-n?, LAMBDA-n, LAMBDA-n?, RESP-n?,
USRCAL-n, USRCAL-n?, USRRESP-n

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ZERO-n

Signal Zeroing Enable
Syntax:

ZERO-n

<state>

where n is either A or

B

Parameters:

The parameter <state>

is

a <number> which can be 0 or

1.

If

the number is

0,

then readings are not adjusted by the stored zero reference.

If

the number is

1,

then readings are adjusted by the stored zero reference.

Function:

This command enables or disables the zeroing feature. Zeroing causes the
stored zero reference

(see

STOZERO-n command) to be subtracted from

incoming signal readings before the incoming signal

is

used in measurement

calculations.
Related Commands: STOZERO-n, ZERO-n?, ZEROVAL-n

ZERO-n?
Signal Zeroing Enable Query

Syntax:

ZERO-n?

where n is either A or

B

Parameters:

None

Function:

This query returns a value showing whether or not zeroing is enabled or

disabled.
Returns: <state>
<state> is of type <number> and represents the integer

0,

if

zeroing

is

enabled,

or

1,

if zeroing

is

disabled.

Related Commands: STOZERO-n, ZERO-n, ZEROVAL-n

ZEROVAL-n?

Zero Signal Query

Syntax:

ZEROVAL-n?

where n

is

either

A

or

B

Parameters: None

Function:

This query returns the current value being used for zeroing.

Returns: <zeroval>

aerovab is of type <number> in exponential notation. The units

of

this value

are the numerator of the detector's responsivity, i.e. amps.
Related Commands:

STOZERO-n, ZERO-n, ZERO-n?

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Section

6

Maintenance,

Power

Up

Self

Test

Test

and

In cleaning the body of this instrument, use only a mild soap and water
solution on a damp cloth.

Do

Troubleshooting

not

use

acetone or other organic solvents (other than alcohoI) on

Model

2832€

DuaKhannel Power Meter. Organic solvents attack the

CAUTION

paint.

the

The Model
and indicates on the display whether the self test has been passed.
test

is

"CAL MODULE
"CAL MODULE B" "MISSING OR BAD
"CAL MODULE
"CAL MODULE B" "CHECKSUM ERROR
"REGISTER ERR
"REGISTER ERR B"
"INTG A/D ERR
"INTG AID ERR B"
"SA
"SA A/D ERR

If

the calibration module messages appear, check to

properly inserted.
Should any other message appear, call Newport Corporation's Customer

Service Department.

2832-C

not passed the display will indicate one of the following error messages:

A/D

executes a system self test after every power up or reset

A

"MISSING OR BAD

A

"CHECKSUM ERROR"

A"

A

ERR

A"

B"

see

that the module is

If

the self

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The following troubleshooting guide
with the power meter so that, to the greatest extent possible, the return of
the power meterldetector system to Newport will be unnecessary. For the

problems that cannot be resolved with information in this manual, or for other
situations that are not covered in this section, please
on returning your entire system to Newport for service.

Table

23

-

Syrnptorn/Fault Troubleshooting Guide

is

intended to isolate and solve problems

see

Section 7 for details

Symptom

Blank display.

Display shows "OL"

Display shows "SA"

Display shows

Any of the following messages:

"REGISTER ERR
"REGISTER ERR
"INTG AID ERR A"
"INTG AID ERR B"
"SA A/D ERR A"
"SA

A/D ERR

B

"-

A

B"

- - -

-"

Possible Fault/Correction

Power switch OFF. Turn switch ON.

Power cord connection is absent. Check

power cord connection.
Display
lndicates that the signal is too large for

the selected signal range. Select a higher
RANGE or use an attenuator if one is
available.

lndicates that the signal exceeds the
detector saturation or damage threshold.
Select a detector with higher power or
energy handling capability or use
attenuator if one is available.

Indicates that the meter is in the middle
of a range change or that the current units
don't match the units

Call Newport Corporation's Customer
Service Department and arrange to
return the unit for repair.

is

blanked. Press DlSP key.

of

the last reading.

an

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The display shows:
"CAL MODULE

or "CAL MODULE B" correctly and reset the meter.

A"

Make sure the CAL MODULE is seated

Try

another

and "MISSING OR BAD" CAL MODULE, if one is available, to

localize the problem to the first

CAL MODULE.

If

the first CAL MODULE does not work
after proper seating and reset, but the
second CAL MODULE works, call Newport
Customer Service and arrange for a repair
of the first CAL MODULE.

If

neither the first or second CAL MODULE
works, call Newport Customer Service
and arrange for a meter repair.
also return the first CAL MODULE

Be

if

sure to

cannot otherwise determine that it
working.

The display shows:
"CAL MODULE

"CAL MODULE B"

A

Call Newport Customer Service and or
arrange to return the meter for repair.

and "CHECKSUM ERROR
The display shows:
"BATTERY FAILURE"

Call

Newport Customer Service and

arrange to return the meter for battery

replacement.

you

is

RS232

communication does

not seem to work

No listener error when attempting
GPlB communications

Display value does not change.
Reading is different than

expected.

Check the

RS232

cable pinouts, Figure
the device talking to the meter

8

data bits, no parity, and 1 stop bit. Also

cable connection and

10.

Make sure that

is

setup for

check the echo mode state.

Check the GPlB cable connections and
the GPIB address.

Press the R/S, R/S A, or R/S B key.

19,

See Table

Errors. (Section

Common Measurement

3.10.6.)

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Section

7

Factory Service

Introduction

This section contains information regarding obtaining factory service for the
Model
maintenance or service of this instrument and/or accessories beyond the
procedures given in Section
problems which cannot be resolved using the guidelines listed in Section
should be referred to Newport Corporation factory service personnel. Con­tact Newport Corporation or your Newport representative for assistance.

2832-C

Dual-Channel Power Meter. The user should not attempt any

6:

Maintenance, Test and Troubleshooting. Any

6

Obtaining

Service

The Model

is

warranted for a period of 1 year. After 1 year, the unit should be returned to

Newport Corporation for recalibration and NlST traceability recertification.

To obtain information concerning factory service, contact Newport Corpora­tion or your Newport representative. Please have the following information
available:

1.

2.

3.

If

the instrument

Return Number, which you should reference in your shipping documents.
Please

information ready when contacting Newport Corporation. Return the com­pleted service form with the instrument.

2832-C

lnstrument model number (On front panel)
Instrument serial number (On rear panel)
Description of the problem.

fill

out the service form, located on the following page, and have the

contains no user serviceable parts. Its calibration accuracy

is

to be returned to Newport Corporation, you will be given

a

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Service

Form

Newport Corporation

USA. Office:

FAX:

7141253-1800

714/86%3144

Name RETURN AUTHORIZATION
Company

Address

Country Date

P.O.

Number Phone Number

Item(s) Being Returned:

Model
Description
Reason for return of goods (please list any specific problems)

List all control settings and describe problem

Show a block diagram of your measurement system including all instruments connected (whether power is turned

on or not). Describe signal source.

rate and energy density.

#

Serial

If

source is a laser, describe output mode, peak power, pulse width, repetition

(Please obtain prior to return of item)

#

(Attach additional sheets as necessary).

#

Where

(factory, controlled laboratory, out-of-doors, etc.)

What power line voltage is used? Variation?

Frequency? Ambient Temperature?

Variation? OF. Rel. Humidity? Other?

Any additional information.

is

the Measurement Being Performed?

(lf

special modifications have been made by the user, please describe below).

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Appendix A

Syntax

and

Definitions

The IEEE 488.2 standard defines two types of string data. These strings are

either single or double quoted. For convenience, the 2832-C also recognizes

an unquoted string with certain restrictions as detailed below. Any of these

forms may be used where a <string> parameter

1. <string>, using double quotes.

2. <string>, using single quotes.

3. <string>, using no quotes.
A description of each type of <string> follows:

is

required.

"this is a string"
'this is a string'

thisisashing

1. <string> defined using double quotes.
A double quote indicates that a string follows, and the string

nated by another double quote. A double quote may be embedded
within the string by using two double quotes together:

""

Example: "this string contains a

All characters within the two outer double quotes are considered part

is

of the string.
quote. The string cannot contain the <CR>(ascii decimal 13), <LF>(ascii

decimal lo), or End or ldentify characters.

<string> defined using single quotes.

2.
This form

that a string follows, and the string is terminated by another single
quote. A single quote may be embedded within the string by using two
single quotes together:

Example: 'this string contains a
All characters within the two outer single quotes are considered part of

the string.
quote. The string cannot contain the <CR>(ascii decimal 13), <LF>(ascii
decimal lo), or End or ldentify characters.

is

an error

It

similar to double quoted string. A single quote indicates

is

an error if the string does not terminate with a single

It

if

double quote"

the string does not terminate with a double

"

single quote'

is

termi-

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