Agilent 53131A/32A/81A Counter Manual

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Agilent 53131A/132A
225 MHz Universal Counter
Operating Guide
Manual Part Number 53131-90055
Printed in Malaysia
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Agilent 53131A/132A
225 MHz Universal Counter
Operating Guide
This guide describes how to use the Agilent 53131A/132A 225 MHz Universal
Counter.
Agilent 53131A/132A 225 MHz
Universal Counter
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Copyright Agilent Technologies
Inc., 1993, 1996, 1998, 1999, 2006
Certification
and Warranty
All Rights Reserved. Reproduction,
adaptation, or translations without
prior written permission is
prohibited, except as allowed under
the copyright laws.
Certification
Printed: October 2006
Printed in Malaysia
Manual part number
53131-90055
Agilent Technologies certifies that
this product met its published
specification at the time of shipment
from the factory. Agilent
Technologies further certifies that its
calibration measurements are
traceable to the United States
National Institute of Standards and
Technology (formerly National
Bureau of Standards), to the extent
allowed by the Institute’s calibration
facility, and to the calibration
facilities of other International
Standards Organization members.
Before Cleaning
Safety Considerations (contd)
Disconnect the product from
operating power before cleaning.
WARNING
BODILY INJURY OR DEATH
MAY RESULT FROM
FAILURE TO HEED A
WARNING. DO NOT
PROCEED BEYOND A
WARNING UNTIL THE
INDICATED CONDITIONS
ARE FULLY UNDERSTOOD
AND MET.
Warning Symbols That May Be
Used In This Book
Instruction manual symbol; the
product will be marked with this
symbol when it is necessary for the
user to refer to the instruction
manual.
Warranty
Agilent warrants Agilent hardware,
accessories and supplies against
defects in materials and
workmanship for a period of one
year from date of shipment. If
Agilent receives notice of such
defects during the warranty period,
Agilent will, at its option, either
repair or replace products which
prove to be defective. Replacement
products may be either new or likenew.
Agilent warrants that Agilent
software will not fail to execute its
programming instructions, for the
period specified above, due to
defects in material and workmanship
when properly installed and used. If
Agilent receives notice of such
defects during the warranty period,
Agilent will replace software media
which does not execute its
programming instructions due to
such defects.
Safety Earth Ground
Indicates hazardous voltages.
Indicates earth (ground) terminal.
or
Indicates terminal is connected to
chassis when such connection is not
apparent.
For detailed warranty information,
see back matter.
Safety Considerations
CAUTION
Damage to equipment, or incorrect
measurement data, may result
from failure to heed a caution. Do
not proceed beyond a CAUTION
until the indicated conditions are
fully understood and met.
An uninterruptible safety earth
ground must be maintained from the
mains power source to the product’s
ground circuitry.
WARNING
WHEN MEASURING POWER
LINE SIGNALS, BE
EXTREMELY CAREFUL AND
ALWAYS USE A
STEP-DOWN ISOLATION
TRANSFORMER WHICH
OUTPUT IS COMPATIBLE
WITH THE INPUT
MEASUREMENT
CAPABILITIES OF THIS
PRODUCT. THIS PRODUCT’S
FRONT AND REAR PANELS
ARE TYPCIALLY AT EARTH
GROUND. THUS, NEVER TRY
TO MEASURE AC POWER
LINE SIGNALS WITHOUT AN
ISOLATION TRANSFORMER.
Indicates Alternating current.
General
This product and related
documentation must be reviewed for
familiarization with this safety
markings and instructions before
operation.
Agilent Technologies, Inc
900 South Taft Avenue
Loveland, Colorado 80537 U.S.A.
Indicates Direct current.
7.NC.NL.A.11.03.97.R1.P.CW6FC
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Warranty (contd)
Agilent does not warrant that the
operation of Agilent products will be
uninterrupted or error free. If Agilent
is unable, within a reasonable time,
to repair or replace any product to a
condition as warranted, customer
will be entitled to a refund of the
purchase price upon prompt return of
the product.
Agilent products may contain
remanufactured parts equivalent to
new in performance or may have
been subjected to incidental use.
The warranty period begins on the
date of delivery or on the date of
installation if installed by Agilent. If
customer schedules or delays Agilent
installation more than 30 days after
delivery, warranty begins on the 31st
day from delivery.
Warranty does not apply to defects
resulting from (a) improper or
inadequate maintenance or
calibration, (b) software, interfacing,
parts or supplies not supplied by
Agilent, (c) unauthorized
modification or misuse, (d) operation
outside of the published
environmental specifications for the
product, or (e) improper site
preparation or maintenance.
TO THE EXTENT ALLOWED BY
LOCAL LAW, THE ABOVE
WARRANTIES ARE EXCLUSIVE
AND NO OTHER WARRANTY OR
CONDITION, WHETHER
WRITTEN OR ORAL, IS
EXPRESSED OR IMPLIED AND
AGILENT SPECIFICALLY
DISCLAIMS ANY IMPLIED
WARRANTIES OR CONDITIONS
OF MERCHANTABILITY,
SATISFACTORY QUALITY, AND
FITNESS FOR A PARTICULAR
PURPOSE.
Agilent will be liable for damage to
tangible property per incident up to
the greater of $300,000 or the actual
amount paid for the product that is
the subject of the claim, and for
damages for bodily injury or death,
to the extent that all such damages
are determined by a court of
competent jurisdiction to have been
directly caused by a defective
Agilent product.
TO THE EXTENT ALLOWED BY
LOCAL LAW, THE REMEDIES IN
THIS WARRANTY STATEMENT
ARE CUSTOMER’S SOLE AND
EXCLUSIVE REMEDIES.
EXCEPT AS INDICATED ABOVE,
IN NO EVENT WILL AGILENT
OR ITS SUPPLIERS BE LIABLE
FOR LOSS OF DATA OR FOR
DIRECT, SPECIAL, INCIDENTAL,
CONSEQUENTIAL (INCLUDING
LOST PROFIT OR DATA), OR
OTHER DAMAGE, WHETHER
BASED IN CONTRACT, TORT, OR
OTHERWISE.
For consumer transactions in
Australia and New Zealand: the
warranty terms contained in this
statement, except to the extent
lawfully permitted, do not exclude,
restrict or modify and are in addition
to the mandatory statutory rights
applicable to the sale of this product
to you.
Assistance
Product maintenance agreements and
other customer assistance agreements
are available for Agilent
Technologies products.
For any assistance, contact your
nearest Agilent Technologies Sales
and Service Office.
Safety Considerations (contd)
WARNING
INSTRUCTIONS FOR
ADJUSTMENTS WHILE
COVERS ARE REMOVED
AND FOR SERVICING ARE
FOR USE BY SERVICETRAINED PERSONNEL
ONLY. TO AVOID
DANGEROUS ELECTRIC
SHOCK, DO NOT PERFORM
SUCH ADJUSTMENTS OR
SERVICING UNLESS
QUALIFIED TO DO SO.
Acoustic Noise Emissions
LpA<47 dB at operator position, at
normal operation, tested per
EN 27779. All data are the results
from type test.
Geräuschemission
LpA<47 dB am Arbeits
platz, normaler Betrieb, geprüft nach
EN 27779.
Die Angagen beruhen auf
Ergebnissen von Typenprüfungen.
WARNING
ANY INTERRUPTION OF THE
PROTECTIVE GROUNDING
CONDUCTOR (INSIDE OR
OUTSIDE THE PRODUCT'S
CIRCUITRY) OR
DISCONNECTING THE
PROTECTIVE EARTH
TERMINAL WILL CAUSE
A POTENTIAL SHOCK
HAZARD THAT COULD
RESULT IN PERSONAL
INJURY. (GROUNDING ONE
CONDUCTOR OF A TWO
CONDUCTOR OUTLET IS
NOT SUFFICIENT
PROTECTION.)
Whenever it is likely that the
protection has been impaired, the
instrument must be made inoperative
and be secured against any
unintended operation.
If this instrument is to be energized
via an autotransformer (for voltage
reduction) make sure the common
terminal is connected to the earthed
pole terminal (neutral) of the power
source.
Instructions for adjustments while
covers are removed and for servicing
are for use by trained-personnel only.
To avoid dangerous electric shock,
do not perform such adjustments or
servicing unless qualified to do so.
For continued protection against fire,
replace the line fuse(s) of the same
current rating and type (for example,
normal blow, time delay). Do not use
repaired fuses or short circuited
fuseholders.
7.NL.A.11.03.97.R1.P.CW6BC
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I
Manufacturer’s Name:
Manufacturer’s Address:
DECLARATION OF CONFORMITY
According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014
Agilent Technologies, Incorporated
Santa Clara Site
5301 Stevens Creek Blvd
Santa Clara, California 95051
Declares, that the product
Product Name:
Model Number:
Product Options:
Universal Counter Frequency Counter
53131A, 53132A
53181A
This declaration covers all options of the above product.
Conforms with the following European Directives:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC
(including 93/68/EEC) and carries the CE Marking accordingly.
EMC
Standard
Limit
IEC 61326-1:1997+A1:1998 / EN 61326-1:1997+A1:1998
CISPR 11:1990 / EN 55011:1991
IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995
IEC 61000-4-3:1995 / EN 61000-4-3:1995
IEC 61000-4-4:1995 / EN 61000-4-4:1995
IEC 61000-4-5:1995 / EN 61000-4-5:1995
IEC 61000-4-6:1996 / EN 61000-4-6:1996
IEC 61000-4-11:1994 / EN 61000-4-11:1994
Group 1 Class A [1]
4kV CD, 8kV AD
3 V/m, 80-1000 MHz
0.5kV signal lines, 1kV power lines
0.5 kV line-line, 1 kV line-ground
3V, 0.15-80 MHz I cycle, 100%
Canada: ICES-001:1998
Australia/New Zealand: AS/NZS 2064.1
Safety
IEC 61010-1:1990+A1:1992+A2:1995 / EN 61010-1:1993+A2:1995
Canada: CSA C22.2 No. 1010.1:1992
Supplemental Information:
[1]
The product was tested in a typical configuration with Agilent Technologies test systems.
July 31, 2001
Date
Art Nanawa, Product Regulations Manager
For further information, please contact your local Agilent Technologies sales office, agent or distributor.
Authorized EU-representative: Agilent Technologies Deutschland GmbH, Herrenberger Straβ e 130, D 71034 Böblingen, Germany
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Contents
In This Guide
Contents and Organization xii
Related Documents xiii
Types of Service Available if Your Instrument Fails xiv
Standard Repair Services (Worldwide) xiv
Express Repair/Performance Calibration Service
(USA Only) xiv
Assembly-Level Service Guide xiv
Repackaging for Shipment xv
Description of the 225 MHz Universal Counter xvi
Options xviii
Hardware xviii
Support xviii
Accessories Supplied and Available xix
Accessories Supplied xix
Accessories Available xix
Supplied Manuals xix
Differences Between Prior and Current Revisions of the Agilent
53131A/132A xx
Agilent 53131A Containing Firmware Revisions (3317, 3335, or
3402) xx
Calibrations xxi
Measurements xxi
Statistics xxii
GPIB Commands xxii
Agilent 53132A Time Interval Delay Arming xxii
Operating Guide
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iii
Contents
Agilent 53131A/132A Quick Reference Guide
1
xxiii
Getting Started
The Front Panel at a Glance 1-2
The Front Panel Indicators at a Glance 1-3
The Front Panel Indicators at a Glance (Cont.) 1-4
The Front Panel Menus at a Glance 1-5
The Front Panel Menus at a Glance (Cont.) 1-6
The Front Panel Menus at a Glance (Cont.) 1-7
The Front Panel Menus at a Glance (Cont.) 1-8
The Display Annunciators at a Glance 1-9
The Display Special Character at a Glance 1-10
The Limit Test Graph Characters at a Glance 1-10
The Rear Panel at a Glance 1-11
Making Measurements 1-12
To Measure Frequency 1-13
To Select Input Coupling and Impedance
1-15
Selecting Input Coupling 1-15
Selecting Input Impedance 1-16
To Set Input Channel Trigger Level/Sensitivity 1-17
Changing Trigger Mode 1-17
Modifying Input Trigger Level 1-17
Selecting Input Trigger Slope 1-18
Selecting Input Sensitivity 1-19
Starting the Measurement 1-19
To Select Scale and Offset 1-19
Entering the Scale Value 1-20
Entering the Offset Value 1-21
Displaying the Math Results 1-22
Disabling Math 1-22
To Set Limits of Measurements 1-23
Setting the Upper Limit 1-24
Setting the Lower Limit 1-26
iv
Operating Guide
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Contents
Setting the Counter to Flag and Stop Measuring On Out-of-Limit
Measurements 1-28
Setting the Counter to Flag On Limits But Continue
Measuring 1-29
Disabling Limit Testing 1-30
Disabling Math 1-30
To Perform Statistics on Measurements 1-31
Selecting the Type of Statistics (Stats) 1-31
Computing Stats on Filtered Data Only 1-32
Displaying Stats After Filtering Data of Input Signal 1-34
Disabling Stats and Math 1-35
To Control Measurement 1-36
2
Operating Your Universal Counter
Introduction 2-2
Chapter Summary 2-2
Where to Find Some Key Working Examples 2-3
How this Counter Works for You 2-4
Using the Measurement Control Keys (Run and Stop/Single) 2-5
Overview of the Measurement Control Keys 2-5
To Use the Measurement Control Keys 2-6
Using Entry/Select (Arrow) Keys 2-8
To Use During Numeric Entry 2-8
To Use When Sequencing Through the Measurement Function Menus
(Freq & Ratio, Time & Period, Other Meas) and the Recall
Menu 2-8
To Use During State Changing (ON/OFF, LO/MED/HI, etc.) 2-9
To Use on Prompted Event Messages (SET OFFSET ?, CAL: OFFS
n ?, TEST: ALL?, etc.) 2-9
To Use on Prompted Help Messages (MATH HELP ?, PRINT HELP
?) 2-9
Using the MEASURE Menu Keys 2-10
Overview of the MEASURE Menus 2-10
Operating Guide
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v
Contents
To Measure Frequency 2-11
To Measure Frequency Ratio 2-12
To Measure Time Interval 2-13
To Measure Period 2-13
To Measure Rise/Fall Times 2-13
To Measure Positive/Negative Pulse Widths 2-14
To Measure Duty Cycle 2-14
To Make Totalize Measurements 2-14
To Make Phase Measurements 2-15
To Measure Positive/Negative Voltage Peaks 2-15
Using the Gate & External Arm Menu Key 2-16
Overview of Gate/External Arming Functions 2-16
Gate/External Arming Capabilities 2-16
AUTO Arming 2-16
EXTERNAL Arming 2-17
TIME Arming 2-17
DIGITS Arming 2-17
Agilent 53131A (and Agilent 53132A With S/N Prefix Below
3646) Time Interval DELAY Arming 2-17
Agilent 53132A (With S/N Prefix 3646 and Above) Time Interval
DELAY Arming 2-20
To Use the Gate and External Arm 2-24
Example Procedure for Gate and External Arm 2-24
Example Procedure for Changing the Number of
Digits of Resolution Displayed for More
Precise Measurements 2-25
Using the MATH Menu Keys 2-27
Overview of Scale/Offset Math Menu 2-27
To Use the Scale/Offset Math Menu 2-28
Example Procedure for Scale Function 2-28
Example Procedure for Offset Function 2-29
Example Procedure for Turning Off Math Mode 2-30
vi
Operating Guide
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Contents
Example Procedure for Setting the Offset From
the Last Measurement Value 2-31
Overview of Statistics (Stats) Menu 2-32
To Use the Stats Menu for Automatic and Continuous Statistical
Analysis 2-33
Example Procedure for Computing Stats 2-33
Example Procedure for Easy Viewing of Stats 2-34
Example Procedure for Filtering Data (Using Limits) During
Stats 2-35
Example Procedure for Configuring SINGLE to Initiate
N Measurements 2-36
Example Procedure for Turning Off Stats Mode 2-36
Using the LIMITS Menu Keys 2-37
Overview of Limits Menus 2-37
To Set and Use Automatic Limit Testing 2-38
Limits Testing Example 1—Flag and Stop Measuring
On Limits 2-38
Limits Testing Example 2—Flag On Limits but
Continue Measuring 2-40
Limits Testing Example 3—Use Analog Graph Display While
Adjusting Input Signal 2-40
Limits Testing Example 4—Selecting Filtering Conditions of
Stats Computation 2-42
Limits Testing Example 5—Sending the Limit-Detect Output to
the RS-232 Serial Port 2-43
Using CHANNEL 1 and CHANNEL 2 Input
Conditioning Keys 2-44
Overview of Trigger/Sensitivity Menu 2-44
To Use the Trigger/Sensitivity Keys to Adjust Counter’s Triggering
Level 2-48
Example Procedure for Setting Trigger Voltage and Sensitivity
Levels 2-48
Example Procedure for Using Common 1 to Make Time Interval
(TI) Measurements on a Single Signal 2-51
Operating Guide
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vii
Contents
Overview of Input Conditioning Toggle Keys 2-51
Using the Save and Recall Menus 2-52
Overview of Save and Recall Functions 2-52
To Use the Save Function 2-53
To Use the Recall Function 2-54
To Unsave a Measurement Setup 2-55
Using the Print Menu 2-56
Overview of the Print Menu 2-56
To Use the Print Menu 2-56
Using the Utility Menu 2-57
Overview of the Utility Menu 2-57
To Set the GPIB Address 2-58
Selecting Operating Mode (Talk/Listen, Talk-Only) 2-58
Setting the GPIB Address 2-58
To Choose the Timebase Source 2-59
To Run the Self-Test Routines 2-59
Overview of the Self-Test Routines 2-59
Example Procedure for Running the Self Test 2-61
To Configure the RS-232 Serial Port for Printing 2-61
Setting the Hardware Pacing 2-62
Setting the Baud Rate 2-62
Setting the Parity 2-63
Setting the Software Pace 2-63
To Configure the RS-232 Serial Port for Sending Limit-Detect
Output 2-64
To Select the Numerical Convention for the Display 2-65
To Connect the Counter to a Serial Printer via the RS-232 Port 2-65
To Connect the Counter to a Printer via GPIB 2-66
To Select the GPIB Talk-Only Mode for Printing 2-66
Using the Calibration Menu 2-67
Overview of the Calibration Menu 2-67
To View the Calibration Menu and Security Status 2-68
viii
Operating Guide
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Contents
To Unsecure for Calibration 2-68
To Initiate the Calibration Routines 2-69
To Secure Against Calibration 2-71
To Change to a New Security Code 2-72
To View the Calibration Count 2-72
To Get Help With the Calibration Menu 2-72
Front Panel Display Messages 2-73
Measurement Result Displays 2-73
Power-Up/Self Test Messages 2-74
Menu Messages 2-75
GPIB Messages 2-77
Preset Values After Power-Up and *RST 2-78
Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646)
Preset Values for Functions Accessible Via Front Panel or
GPIB 2-79
Agilent 53132A (With S/N Prefix 3646 and Above) Preset Values for
Functions Accessible Via Front Panel or GPIB 2-85
Preset Values for Functions Accessible Via GPIB Only 2-91
Summary of the Measurement Sequence 2-93
Common Questions 2-94
Why is Stats result not available yet? 2-94
Why won’t printer work? 2-94
Why did Counter stop measuring? 2-94
Why did Counter go to its default state after I set up my RS-232
port? 2-94
Counter’s numeric display does not follow the numerical convention
for my country. 2-94
How do I display the 13th digit in my numerical result? 2-94
3
Specifications
Introduction 3-2
Instrument Inputs 3-2
Instrument Inputs (Continued)
3-3
Operating Guide
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ix
Contents
Time Base 3-4
Measurement Specifications 3-5
Measurement Specifications (Continued) 3-6
Measurement Definitions 3-12
Measurement Definitions (Continued) 3-13
Measurement Arming and Processing 3-14
Measurement Arming and Processing (Continued)
General Information 3-16
3-15
Index
x
Operating Guide
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In This Guide
This book is the operating guide for the Agilent 53131A and Agilent 53132A
225 MHz Universal Counters. It consists of a table of contents, this preface, a quick
reference guide, three chapters, and an index.
This preface contains the following information:
•
Contents and Organization
page xii
•
Related Documents
page xiii
•
Types of Service Available if Your Instrument Fails
page xiv
•
Repackaging for Shipment
page xv
•
Description of the 225 MHz Universal Counter
page xvi
•
Options
page xviii
•
Accessories Supplied and Available
page xix
–
page xix
•
Supplied Manuals
Differences Between Prior and Current Revisions of the
Agilent 53131A/132A
page xx
Operating Guide
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xi
In This Guide
Contents and Organization
Table of Contents
The Quick Reference Guide consists of a Menu Tree (cut-out sheet) that serves as a
device to trigger your memory or get you quickly reacquainted with the instrument,
and Menu Roadmaps that illustrate how to navigate through the menus. It is located
after this preface.
Chapter 1, “Getting Started,” is a quick start guide that gives you a brief overview of
the Counter’s keys, indicators, menus, display, and connectors. Last, a graphical
procedure for performing a complete measurement is provided.
Chapter 2, “Operating Your Universal Counter,” is an operator’s reference. You are
given an overview of each group of front-panel keys, operating functions, and menus
followed by a series of exercises that guide you through the operation of the Counter.
Chapter 3, “Specifications,” lists the specifications and characteristics of the Counter.
Index
xii
Operating Guide
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In This Guide
Related Documents
For more information on universal counters refer to the following Series 200
Application Notes:
•
Fundamentals of Electronic Frequency Counters
Application Note 200—Agilent part number 02-5952-7506.
•
Fundamentals of Time Interval Measurements
Application Note 200-3—Agilent part number 02-5952-7561.
•
Understanding Frequency Counter Specifications
Application Note 200-4—Agilent part number 02-5952-7522.
Operating Guide
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xiii
In This Guide
Types of Service Available if Your Instrument Fails
If your Agilent 53131A/132A fails within one year of original purchase,
Agilent will repair it free of charge. If your instrument fails after your one-year
warranty expires, Agilent will repair it, or you can repair it yourself by ordering the
service guide (Agilent part number 53131-90039).
There are three types of repair services:
•
Standard repair service—if downtime is not critical.
•
Express Repair/Performance Calibration Service—if downtime is critical.
•
Order the Assembly-Level Service Guide and repair unit yourself.
Standard Repair Services (Worldwide)
Contact your nearest Agilent Technologies Service Center. They will arrange to have
your Agilent 53131A/132A Universal Counter repaired.
Express Repair/Performance Calibration Service
(USA Only)
If downtime is critical, you can receive your repaired Agilent 53131A/132A via
overnight shipment. Just call 1-800-403-0801 and ask for Express
Repair/Performance Calibration Service. When your Counter is repaired, it will be
returned via overnight shipment.
Assembly-Level Service Guide
If your Agilent 53131A/132A 1-year warranty has expired and you choose to repair
the instrument yourself or would like more details on self test and calibration, refer to
the Agilent 53131A/132A Assembly-Level Service Guide, Agilent part number
53131-90039.
xiv
Operating Guide
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In This Guide
Repackaging for Shipment
For the Express Repair/Performance Calibration Service described above, return your
failed Agilent 53131A/132A to the designated Agilent Technologies Service Center,
using the shipping carton of the instrument. Agilent will notify you when your failed
instrument has been received.
If the instrument is to be shipped to Agilent for service or repair, be sure you do the
following:
•
Attach a tag to the instrument identifying the owner and indicating the required
service or repair. Include the instrument model number and full serial number.
•
Place the instrument in its original container with appropriate packaging
material.
•
Secure the container with strong tape or metal bands.
If the original shipping container is not available, place your unit in a container which
will ensure at least 4 inches of compressible packaging material around all sides of
the unit. Use static free packaging materials to avoid additional damage to your unit.
Agilent Technologies suggests that you always insure shipments.
Operating Guide
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xv
In This Guide
Description of the 225 MHz Universal Counter
The Agilent 53131A and Agilent 53132A are universal counters capable of
measuring frequencies to 225 MHz on Channels 1 and 2. With an optional Channel 3
Option 030, Option 050, or Option 124, this capability is extended to 3.0, 5.0, or
12.4 GHz, respectively.
For the Agilent 53131A, frequency and time interval resolutions are 10 digits in one
second and 500 picoseconds, respectively. The Agilent 53131A provides users with a
GPIB measuring speed of up to 200 measurements per second, and is suitable for
bench-top operation and lower-volume ATE operation. The frequency and time
interval resolutions for the Agilent 53132A are up to 12 digits in one second and 150
picoseconds, respectively. The Agilent 53132A provides users with exceptional
resolution, and is ideal for ATE systems operation.
The Agilent 53131A/132A basic measurement functions include Frequency, Period,
Pulse Width, Duty Cycle, Rise/Fall Time, Time Interval, Frequency Ratio, Totalize,
Phase, and Peak Voltage. The Agilent 53131A/132A Counter has four arming modes:
auto, external, digits and time. However, the Agilent 53132A with serial number
prefix 3646 and above has expanded arming capabilities for Time Interval
measurements.
xvi
Operating Guide
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In This Guide
The Agilent 53131A/132A include additional measurement functions and features
that are designed specifically for manufacturing and service applications:
•
1, 5, 10 MHz external reference capability—to match customer’s house standard
(however, the Agilent 53132A’s external reference capability is 10 MHz only),
•
optional ultra high, high, or medium stability oven oscillators for high accuracy
needs and lengthened calibration cycles,
•
external gating,
•
statistics,
•
automatic limit testing,
•
SCPI programming capability, and
•
analog display mode limit testing
Programmable control is performed via an GPIB. The GPIB and a talk-only RS-232C
serial port are standard for the Agilent 53131A and Agilent 53132A. The serial port is
for printing measured and analyzed data on serial printers, or for outputting an out-oflimit signal.
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xvii
In This Guide
Options
The options available for the Agilent 53131A/132A 225 MHz Universal Counter are
listed following this paragraph. Specifications for the options are listed in Chapter 3,
“Specifications.” If you’ve purchased an option with the initial order, it will be
installed at the factory and ready for operation at delivery. Refer to the “Retrofitting
Options” chapter in the Assembly-Level Service Guide for instructions on field
installation of the options.
NOTE
The “0’s” and “1’s” in the following option numbers are numeric characters (that is,
they are not letters).
Hardware
•
Medium Stability Oven Timebase, Option 001
•
DC Power Input, Option 002
•
High Stability Oven Timebase, Option 010
•
Ultra-High Stability Oven Timebase, Option 012 (Agilent 53132A only)
•
3.0 GHz RF Input Channel (Channel 3), Option 030
•
5.0 GHz RF Input Channel (Channel 3), Option 050
•
12.4 GHz RF Input Channel (Channel 3), Option 124
•
Rear Terminals1, Option 060
•
Rack Mount Kit, Option 1CM. Also available under Agilent part number 50629240.
•
Lock-Link Kit (side-by-side) available under Agilent part number 5061-9694.
Also requires Flange Kit, part number 5062-3974.
Support
•
5-year Return to Agilent for Repair, Option W50
•
5-year Return to Agilent for Calibration, Option W52
1
The two standard input channels (1 and 2) will have both front and rear terminals. Option 030 Channel 3 will
have a rear terminal only. Option 050 and Option 124 Channel 3 will have a front terminal only.
xviii
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In This Guide
Accessories Supplied and Available
Accessories Supplied
•
Power cord, 2.3 meters
Accessories Available
•
Agilent 34161A Accessory Pouch
•
Agilent 34131A Transit Case
•
Printer RS-232 Interface cables, Agilent 24542G or Agilent 24542H
•
GPIB cables, Agilent 10833A/B/C/D
Supplied Manuals
•
Agilent 53131A/132A Operating Guide—this guide
(Agilent P/N 53131-90055)
•
Agilent 53131A/132A Programming Guide
(Agilent P/N 53131-90044)
•
Agilent 53131A/132A Assembly-Level Service Guide
(Agilent P/N 53131-90039)
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xix
In This Guide
Differences Between Prior and Current Revisions of
the Agilent 53131A/132A
If you have an Agilent 53131A containing one of the prior firmware revisions (3317,
3335, or 3402), read the subsection below titled “Agilent 53131A Containing
Firmware Revisions (3317, 3335, or 3402)” to get an overview of the differences
between the earlier firmware revisions and current firmware revision.
If you have an Agilent 53132A with a serial number prefix below 3646, read the
subsection titled “Agilent 53132A Time Interval Delay Arming” on page xxii.
NOTE
Note that throughout the guide, differences between the earlier and current firmware
revisions are noted where applicable.
Agilent 53131A Containing Firmware Revisions (3317, 3335, or
3402)
There are four main areas that differ:
•
Calibrations
•
Measurements
•
Statistics
•
GPIB Commands
xx
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In This Guide
Calibrations
If your Counter contains other than the current firmware revision, the following
calibration features are different:
•
The calibration functions are in the Utility menu instead of the Calibration menu,
which is accessed by pressing and holding the front-panel Utility key and then
cycling POWER key.
•
Calibrations are not protected by a security code.
•
A calibration count does not exist to aid in monitoring the number of calibrations
performed.
•
A more accurate Time Interval calibration (FINE TI) is not available.
See the section titled “Using the Calibration Menu” in Chapter 2 of the
Agilent 53131A/132A Operating Guide for details.
Measurements
If your Counter contains other than the current firmware revision, the following
measurement capabilities are different:
•
Ratio channel selections Ratio 2 to 1 and Ratio 3 to 1 (for those counters
equipped with Channel 3) are not available.
•
Ratio “AUTO-armed” does not automatically extends gate to capture sufficient
edges.
If Channel 1 input frequency is less than approximately 10 Hz, the Ratio gate
time is not extended to capture sufficient Channel 1 edges to produce a valid
measurement. Default gate time is 100 msec, which is not long enough to capture
two edges on a low-frequency signal. The user is required to extend the gate by
switching to TIME arming, and selecting a gate time appropriately long.
•
Sensitivity for firmware revision below does not have adjusted controls to LO
and MED sensitivity.
In some Counters that contained firmware revision 3317, LO sensitivity fails to
correctly count very high frequency signals.
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xxi
In This Guide
Statistics
If your Counter contains other than the current firmware revisions, single-shot
statistics are not available using the ON SINGLE: menu item found in the Statistics
menu (use Stats key).
GPIB Commands
[:SENSe]:EVENt[1|2}:HYSTeresis:RELative
If your Counter contains firmware revisions 3402 and below, the input hysteresis
command and query does not operate in the conventional way. That is,
[:SENSe]:EVENt[1|2]:HYSTeresis:RELative sets high sensitivity when the
parameter is MINimum or 0 percent, and sets low sensitivity when the parameter is
MAXimum or 100 percent.
In the prior firmware revisions (3317, 3335, or 3402), MINimum or 0 percent
corresponded to low sensitivity, and MAXimum or 100 percent corresponded to high
sensitivity.
:CONFigure:TOTalize:TIMed
:CONFigure:TOTalize:CONTinuous
:MEASure:TOTalize:TIMed?
If your Counter contains firmware revisions 3402 and below, the Totalize
Measurement Instruction commands (shown above) are not available to disable autotrigger.
In the firmware revisions 3402 and below, these commands enabled auto-trigger at
the 50% level.
Agilent 53132A Time Interval Delay Arming
Agilent 53131A and Agilent 53132A Counters with a serial number prefix below
3646 are identical in their TI arming modes. Both only offer Time Interval Delay,
where the STOP trigger of a time interval measurement can be delayed by a
user-specified time.
xxii
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Agilent 53131A/132A Quick Reference Guide
The Quick Reference Guide is designed for experienced users of the
Agilent 53131A/132A Universal Counter. It is intended to be used as a tool to trigger
your memory. If you are using the Agilent 53131A/132A for the first time, Agilent
Technologies recommends that you at least read Chapter 1, “Getting Started,” in the
Operating Guide first.
The Quick Reference Guide follows this page, and consists of the following items:
•
Menu Trees which may be torn out of the guide for external use (pages 1, 2, 3a,
and 3b).
•
Menu Roadmaps which illustrate via key-press sequences how to navigate
through the menus under the menu keys (pages 4 through 11). Key-press
sequences are provided for the following menu keys:
–
Freq & Ratio
–
Time & Period
–
Other Meas
–
Gate & ExtArm
–
Uppr & Lower
–
Limit Modes
–
Scale & Offset
–
Stats
–
Trigger/Sensitivity
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xxiii
xxiv
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Agilent 53131A/132A
Universal Counter
Other
Meas
Time &
Period
Freq &
Ratio
FREQUENCY 1
T I 1 TO 2
FREQUENCY 2
PERIOD 1
PHASE 1 TO 2
FREQUENCY 3
RISETIME 1
DUTYCYCLE 1
RAT I O 1 TO 2
FALLTIME 1
VOLT PEAKS 1
RAT I O 1 TO 3
POS WIDTH 1
VOLT PEAKS 2
RAT I O 2 TO 1
NEG WIDTH 1
TOTAL I Z E 1
RAT I O 3 TO 1
Uppr &
Lower
Limit
Modes
Scale &
Offset
Stats
UPPR: 0.000000
LIM TEST: OFF
SCALE:1.000000
SHOW: MEAS
LOWR: 0.000000
LIM TEST: ON
OFFS: 0.000000
SHOW: STD DEV
ON FAIL:GO ON
SET OFFSET ?
SHOW: MEAN
ON FAIL: STOP
MATH: OFF
SHOW: MAX
SHOW: NUMBER
MATH: ON
SHOW: MIN
SHOW: GRAPH
MATH HELP?
N:
100
STATS: OFF
STATS: ON
USE: ALL MEAS
USE: I N L I M I T
ON SINGLE: 1
ON SINGLE: N
(Agilent 53131A and Agilent 53132A)
1
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Agilent 53131A/132A
Universal Counter
Recall
Save &
Print
Trigger
Sensitivity
NO REGISTERS
SAVE:
AUTO TRG: ON
AUTO TRG: OFF
RECALL 0
UNSAVE:
LEVEL: 50 PCT
LEVEL: 0.000V
RECALL 1
PRINT: OFF
SLOPE: POS
SLOPE: POS
RECALL 2
PRINT: ON
SLOPE: NEG
SLOPE: NEG
RECALL 3
PRINT HELP?
SENSTVTY: HI
SENSTVTY: HI
RECALL 4
SENSTVTY: LO
SENSTVTY: LO
RECALL 5
SENSTVTY:MED
SENSTVTY:MED
COMMON 1: OFF
COMMON 1: OFF
COMMON 1: ON
COMMON 1: ON
RECALL 20
50Ω
1MΩ
DC
AC
X10
Attenuate
100kHz
Filter
CH 1: 50 OHM
CH 1: DC
CH 1: X10 ATT
CH 1: LP FILT
CH 1: 1M OHM
CH 1: AC
CH 1: X1 ATT
CH 1: NO FILT
(Agilent 53131A and Agilent 53132A)
2
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Agilent 53131A and
Agilent 53132A (Serial Number Prefix below 3646)
Universal Counter
Gate &
ExtArm
GATE: TIME
GATE: AUTO
TIME: .100 s
Time &
Period
GATE: EXTERNL
START: POS
GATE: DIGITS
DIGITS: 4
START: NEG
STOP: AUTO
T I 1 TO 2
STOP: NEG
-- -- -- -- -- -- -- -- -- -- -- --
STOP: POS
STOP: TIME
TIME: .100 s
Gate &
ExtArm
ARM : EXTERNL
ARM: AUTO
DELAY : NONE
DELAY : TIME
T IME :
.01000
SLOPE : POS
DELAY: NONE
SLOPE : NEG
DELAY: TIME
TIME :
.01000
(Agilent 53131A and Agilent 53132A S/N below 3646)
3a
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Agilent 53132A (Serial Number Prefix 3646 and above)
Universal Counter
Gate &
ExtArm
GATE: TIME
Time &
Period
GATE: EXTERNL
GATE: AUTO
TIME: .100 s
GATE: DIGITS
DIGITS: 4
START: POS
START: NEG
STOP: AUTO
T I 1 TO 2
STOP: NEG
-- -- -- -- -- -- -- -- -- -- -- --
STOP: POS
STOP: TIME
TIME: .100 s
Gate &
ExtArm
START: EXT
START: AUTO
DELAY : NONE
DELAY :TIME
DELAY : EVENT
T :
E :
.1
SLOPE : POS
1
DELAY: NONE
T:
STOP : AUTO
DELAY : NONE
SLOPE : NEG
DELAY: EVENT
DELAY: TIME
.1
E:
1
STOP : EXT
SLOPE : POS
SLOPE : NEG
DELAY : TIME
DELAY : EVENT
T :
E :
.1
1
(Agilent 53132A S/N 3646 and above)
3b
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Agilent 53131A/132A
Universal Counter
Freq &
Ratio
Other
Meas
Time &
Period
MEASURE
Freq &
Ratio
Freq &
Ratio
FREQUENCY 1
Time &
Period
Time &
Period
1
T I 1 TO 2
Other
Meas
Other
Meas
TOTALIZE 1
Freq &
Ratio
FREQUENCY 2
Time &
Period
PERIOD 1
Other
Meas
PHASE 1 TO 2
Freq &
Ratio
FREQUENCY 3
Time &
Period
RISETIME 1
Other
Meas
DUTYCYCLE 1
Freq &
Ratio
RATIO 1 TO 2
Time &
Period
FALLTIME 1
Other
Meas
VOLT PEAKS 1
Freq &
Ratio
RATIO 1 TO 3
Time &
Period
POS WIDTH 1
Other
Meas
VOLT PEAKS 2
Freq &
Ratio
RATIO 2 TO 1
Time &
Period
NEG WIDTH 1
Freq &
Ratio
RATIO 3 TO 1
(Agilent 53131A and Agilent 53132A)
4
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Agilent 53131A/132A
Universal Counter
Gate &
ExtArm
MEASURE
Freq &
Ratio
Gate &
ExtArm
––––––––––––
FREQUENCY 1
Gate &
ExtArm
GATE: TIME
TIME:
.100
TIME:
.200
Gate &
ExtArm
Enter
RUN
GATE: AUTO
RUN
Gate &
ExtArm
START:
START: POS
GATE: EXTERNL
Gate &
ExtArm
START: NEG
STOP:
STOP: AUTO
Gate &
ExtArm
STOP: NEG
STOP: POS
STOP: TIME
Gate &
ExtArm
TIME:
.100
Enter
TIME:
GATE: DIGITS
Gate &
ExtArm
RUN
.2000
DIGITS:
10
DIGITS:
5
Gate &
ExtArm
Enter
RUN
(Agilent 53131A and Agilent 53132A)
5
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Agilent 53131A and
Agilent 53132A (Serial Number Prefix below 3646)
Universal Counter
Gate &
ExtArm
MEASURE
Time &
Period
Gate &
ExtArm
TI 1 TO 2
Gate &
ExtArm
––––––––––––
ARM:
RUN
ARM: AUTO
ARM: EXTERNL
Gate &
ExtArm
SLOPE:
SLOPE: POS
SLOPE: NEG
Gate &
ExtArm
RUN
DELAY:
RUN
DELAY: NONE
DELAY: T I M E
Gate &
ExtArm
TIME:
RUN
.01000
Enter
TIME:
.02000
(Agilent 53131A and Agilent 53132A S/N below 3646)
6a
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Agilent 53132A (Serial Number Prefix 3646 and above)
Universal Counter
Gate &
ExtArm
MEASURE
Time &
Period
TI 1 TO 2
-----------
START:
Gate &
ExtArm
START: EXT
Gate &
ExtArm
START: AUTO
Gate &
ExtArm
SLOPE:
SLOPE: POS
SLOPE: NEG
Gate &
ExtArm
DELAY:
DELAY :NONE
DELAY :TIME
DELAY :EVENT
Gate &
ExtArm
T :
.1
Enter
Gate &
ExtArm
E:
T:
100.1
E:
1000
1
Enter
A
B
C
(Agilent 53132A S/N 3646 and above)
6b
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Agilent 53132A (Serial Number Prefix 3646 and above)
Universal Counter
Gate &
ExtArm
A
B
C
Gate &
ExtArm
STOP
:
STOP
STOP
Gate &
ExtArm
:EXT
:AUTO
SLOPE :
SLOPE : POS
SLOPE : NEG
Gate &
ExtArm
DELAY :
DELAY :NONE
Run
DELAY :TIME
DELAY :EVENT
Gate &
ExtArm
T :
Run
.1
Enter
T :
Gate &
ExtArm
E :
100.1
Run
1
Enter
E :
1000
(Agilent 53132A S/N 3646 and above)
6c
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Agilent 53131A/132A
Universal Counter
Uppr &
Lower
Limit
Modes
LIMITS
Uppr &
Lower
Enter
Uppr &
Lower
Uppr &
Lower
UPPR: 0.000000
UPPR: 5.100000
LOWR: 0.000000
LOWR: 4.900000
RUN
Enter
RUN
Limit
Modes
Limit
Modes
LIM TEST:
LIM TEST: OFF
RUN
LIM TEST: ON
Limit
Modes
ON FAIL:GO ON
ON FAIL:GO ON
RUN
ON FAIL: STOP
Limit
Modes
SHOW: NUMBER
SHOW: NUMBER
RUN
SHOW: GRAPH
(Agilent 53131A and Agilent 53132A)
7
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Agilent 53131A/132A
Universal Counter
Scale &
Offset
MATH
Scale &
Offset
Enter
Scale &
Offset
SCAL: 1.000000
SCAL: 2.000000
Scale &
Offset
OFFS: 0.000000
OFFS: 0.500000
RUN
Scale &
Offset
SET OFFSET?
OFFS:-nnnnnnn
RUN
Scale &
Offset
MATH:
MATH: OFF
RUN
RUN
Enter
Enter
MATH: ON
Enter
Scale &
Offset
MATH HELP ?
(MEAS X SCALE) + OFFS = RESULT
(Agilent 53131A and Agilent 53132A)
8
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Agilent 53131A/132A
Universal Counter
Stats
MATH
Stats
Stats
SHOW:
Stats
N:
100
N:
200
RUN
STATS:
OFF
RUN
STATS:
ON
Enter
SHOW: MEAS
SHOW: STD DEV
SHOW: MEAN
Stats
SHOW: MAX
STATS:
SHOW: MIN
Stats
USE:
USE: ALL MEAS
Run
USE: IN LIMIT
Stats
ON SINGLE:
ON SINGLE: 1
Run
ON SINGLE: N
(Agilent 53131A and Agilent 53132A)
9
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Agilent 53131A/132A
Universal Counter
Trigger
Sensitivity
CHANNEL 1
CHANNEL 2
Freq &
Ratio
Trigger
Sensitivity
––––––––––––
FREQUENCY 1
AUTO TRG:
RUN
AUTO TRG: ON
FREQUENCY 2
AUTO TRG: OFF
FREQUENCY 3
RATIO 1 TO 2
Trigger
Sensitivity
RATIO 1 TO 3
RATIO 2 TO 1
RATIO 3 TO 1
LEVEL: 0.000V
RUN
LEVEL: 2.000V
Time &
Period
PERIOD 1
RISETIME 1
FALLTIME 1
POS WIDTH 1
NEG WIDTH 1
Trigger
Sensitivity
LEVEL: 50 PCT
RUN
LEVEL: 75 PCT
Enter
Trigger
Sensitivity
SLOPE:
Other
Meas
SLOPE: POS
RUN
SLOPE: NEG
TOTALIZE
PHASE 1 TO 2
DUTY CYCLE 1
Trigger
Sensitivity
Trigger
Sensitivity
SENSTVTY:
SENSTVTY: HI
RUN
SENSTVTY: LO
SENSTVTY: MED
(Agilent 53131A and Agilent 53132A)
10
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Agilent 53131A/132A
Universal Counter
Trigger
Sensitivity
CHANNEL 1
CHANNEL 2
Time &
Period
TI 1 TO 2
Trigger
Sensitivity
––––––––––––
AUTO TRG:
Trigger
Sensitivity
AUTO TRG: ON
RUN
AUTO TRG: OFF
RUN
Trigger
Sensitivity
Trigger
Sensitivity
LEVEL: 0.000V
LEVEL: 2.000V
LEVEL: 50 PCT
LEVEL: 75 PCT
Enter
RUN
Trigger
Sensitivity
SLOPE:
SLOPE: POS
RUN
SLOPE: NEG
Trigger
Sensitivity
SENSTVTY:
SENSTVTY: HI
RUN
SENSTVTY: LO
SENSTVTY: MED
Trigger
Sensitivity
COMMON 1:
COMMON 1: OFF
RUN
COMMON 1: ON
(Agilent 53131A and Agilent 53132A)
11
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1
Getting Started
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Chapter 1 Getting Started
The Front Panel at a Glance
1
The Front Panel at a Glance
2
1
3
4
5
6
CHANNEL 3
5 3131 A 225 MHz
100 MHz − 3 GHz
UNIVERSAL COUNTER
MHz
µs
Gate
Period Freq +Wid -Wid Rise
MEASURE
MATH
Remote
SRQ
Freq &
Ratio
Time &
Period
Uppr &
Lower
Scale &
Offset
Other
Meas
Gate &
ExtArm
Limit
Modes
Stats
Utility
Recall
Local
Save &
Print
POWER
Utility Menu:
Hold at power up
14
8
9
!
+/–
Enter
Fall Time Ch 1 Ch 2 Ch 3 Limit ExtRef
LIMITS
Run
7
CHANNEL 1
Stop/
Single
10 11
CHANNEL 2
Trigger
Sensitivity
Trigger
Sensitivity
50 Ω
1MΩ
50 Ω
1MΩ
!
DC
AC
Damage Lvl:
5V rms MAX.50Ω
X10
Attenuate
12
100kHz
Filter
Damage Lvl:
5V rms MAX.50Ω
!
DC
AC
Damage Lvl:
5V rms MAX.50Ω
X10
Attenuate
100kHz
Filter
13
Note: Unit shown with Option 030.
1 Measurement function menu keys
2 Limits menu keys
10 Gate and External Arm menu key
3 Math menu keys
11 Measurement control keys
4 Sign (+ or −) selection toggle key
12 Channel 1 Trigger/Sensitivity menu key
and input conditioning keys
5 Data Entry/Select (or arrow) keys
6 Enter numeric data (terminate) key
7 3.0/5.0/12.4 GHz RF input channel
(optional)
8 Utility menu key (Hold during power-up
to access Utility functions.)
NOTE
9 Recall, Save and Print menu keys
13 Channel 2 Trigger/Sensitivity menu key
and input conditioning keys
14 Calibration menu key (Hold Scale &
Offset key during power-up to access
Calibration functions.)
It is normal operation for the fan in the Counter to continue to run after the Counter is
placed in Standby mode. Power to the timebase is continuous to maintain long term
measurement reliability, and the fan helps maintain timebase temperature stability.
1-2
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Chapter 1 Getting Started
The Front Panel Indicators at a Glance
The Front Panel Indicators at a Glance
Indicators
Description of the Indicators
Time &
Period
When one of these indicators is lit, it simultaneously
indicates which key’s menu (for example, Time & Period
key) and its menu item (for example, TI 1 to 2) is enabled.
Scale &
Offset
Limit
Modes
When these indicators are lit, the key’s “enable” menu item
(that is, Limit Modes/LIM TEST, Scale & Offset/MATH,
Stats/STATS, and Save & Print/PRINT) is enabled.
Stats
Local
Save &
Print
Freq &
Ratio
Other
Meas
Trigger
Sensitivity
When this indicator is lit, it indicates that you are in the
Trigger/Sensitivity menu for the corresponding channel.
When this indicator flashes, it indicates that the arrow keys
can be used to modify or enter data.
+/–
Run
Enter
Stop/
Single
When one of these indicators is lit, it indicates that the Run
or Single function is enabled.
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1-3
1
There are eight different groups of indicators or LEDs. They are listed and described
in the following table.
Chapter 1 Getting Started
The Front Panel Indicators at a Glance (Cont.)
1
The Front Panel Indicators at a Glance (Cont.)
Indicators
Description of the Indicators
When this indicator flashes, it indicates that the Counter is
triggering on the input signal. If the input signal is too high,
this indicator remains ON. If the input signal is too low, this
indicator is OFF.
50Ω
1MΩ
DC
AC
X10
Attenuate
100kHz
Filter
When one of these indicators is lit, it indicates that the
adjacent choice (that is, 50Ω, DC, X10, or 100kHz Filter) is
enabled or active. Note that when these indicators are not lit,
then the other choice (that is, 1MΩ, AC, X1, or no filter) is
active.
A lit Remote indicator indicates that the Counter is in remote
mode (Note: In the remote mode, the Save & Print key
becomes the Local key.)
If (while in remote) an error occurs, the Remote indicator
will flash. The indicator will continue flashing until the
controller has read or cleared the error queue, or until the
front panel returns to local mode.
An unlit Remote indicator indicates that the Counter is in
local mode.
SRQ
1-4
The SRQ indicator indicates that the Counter has requested
service from the controller. The SRQ indicator will remain lit
until the controller has recognized the service request and
serial polled the Counter, or taken specific action to cancel
the request (for example, *CLS command).
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Chapter 1 Getting Started
The Front Panel Menus at a Glance
The Front Panel Menus at a Glance
1
Freq &
Ratio
1
1
1
Time &
Period
Other
Meas
Gate &
ExtArm
2
FREQUENCY 1
T I 1 TO 2
TOTAL I Z E 1
FREQUENCY 2
PERIOD 1
PHASE 1 TO 2
GATE: AUTO
FREQUENCY 3
RISETIME 1
DUTYCYCLE 1
GATE: EXTERNL
RAT I O 1 TO 2
FALLTIME 1
VOLT PEAKS 1
GATE: DIGITS
RAT I O 1 TO 3
POS WIDTH 1
VOLT PEAKS 2
RAT I O 2 TO 1
NEG WIDTH 1
GATE: TIME
RAT I O 3 TO 1
Uppr &
Lower
Limit
Modes
Scale &
Offset
Stats
UPPR: 0.000000
LIM TEST: OFF
SCALE:1.000000
SHOW: MEAS
LOWR: 0.000000
LIM TEST: ON
OFFS: 0.000000
SHOW: STD DEV
ON FAIL:GO ON
SET OFFSET ?
SHOW: MEAN
ON FAIL: STOP
MATH: OFF
SHOW: MAX
SHOW: NUMBER
MATH: ON
SHOW: MIN
SHOW: GRAPH
MATH HELP?
N:
100
STATS: OFF
STATS: ON
USE: ALL MEAS
USE: I N L I M I T
ON SINGLE: 1
ON SINGLE: N
1
These menu items appear only if your Counter contains the optional Input Channel.
2
Refer to the Menu Tree in the Quick Reference Guide (which precedes this chapter) and/or the Gate/External
Arming table in Chapter 2 for details on the Gate & ExtArm menu.
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1-5
Chapter 1 Getting Started
The Front Panel Menus at a Glance (Cont.)
1
The Front Panel Menus at a Glance (Cont.)
Save &
Print
Recall
3
4
NO REGISTERS
Trigger
Sensitivity
SAVE:
AUTO TRG: ON
AUTO TRG: OFF
UNSAVE:
LEVEL: 50 PCT
LEVEL: 0.000V
RECALL 1
PRINT: OFF
SLOPE: POS
RECALL 2
PRINT: ON
SLOPE: NEG
RECALL 3
PRINT HELP?
SENSTVTY: HI
RECALL 0
5
RECALL 4
SENSTVTY: LO
RECALL 5
SENSTVTY:MED
6
RECALL 20
COMMON 1: ON
DC
AC
50Ω
1MΩ
7
CH 1: 50 OHM
CH 1: 1M OHM
COMMON 1: OFF
7
CH 1: DC
CH 1: AC
X10
Attenuate
7
CH 1: X10 ATT
CH 1: X1 ATT
100kHz
Filter
7
CH 1: LP FILT
CH 1: NO FILT
3
This appears when nothing can be recalled.
4
Only registers which can be recalled will appear in this menu.
5
This menu item only appears if an instrument setup has been saved.
6
COMMON 1 only appears when the Counter is operating in the Time Interval measurement function
(TI 1 TO 2).
7
Channel 2 is the same, except “CH 2” instead of “CH 1” is displayed. These menus will terminate after
two seconds.
1-6
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Chapter 1 Getting Started
The Front Panel Menus at a Glance (Cont.)
The Front Panel Menus at a Glance (Cont.)
Turn power off, press and hold Recall (Utility) key, then press POWER key to access
this menu.
POWER
Utility
Recall
On / Stby
REV:
TEST: ALL?
BAUD: 9600
TEST: DISP?
BAUD: 19200
TIMEBAS: I NT
TEST: CPU?
BAUD: 300
TIMEBAS: EXT
TEST: ROM?
BAUD: 1200
CAL: HELP?
TEST: RAM?
BAUD: 2400
TEST LOOP: OFF
TEST: EEPROM?
PARITY: OFF
TEST LOOP: ON
TEST: HP-IB?
PARITY: EVEN
TST PRINT:OFF
TEST: QSPI?
PARITY: ODD
TST PRINT: ON
TEST: FPGA?
SW PACE: XON
TEST: FR END?
SW PACE: NONE
TEST: MEAS?
DTR: HIGH
TEST: INTERP?
DTR: LIMIT
TEST: KEYPAD?
DTR: HW PACE
TEST: PRINT?
SHOW 9 AS: 9.0
HP-IB:
3
TIMEBAS: AUTO
8
8
SHOW 9 AS: 9,0
8
These menu items appear only if TEST LOOP is OFF.
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1-7
1
NOTE
Chapter 1 Getting Started
The Front Panel Menus at a Glance (Cont.)
1
The Front Panel Menus at a Glance (Cont.)
NOTE
Turn power off, press and hold Scale & Offset key, then press POWER key to access
this menu. (This menu does not exist in early versions of the Counter. In the early
versions of the Counter, the CAL: menu item resides in the Utility menu, and there is
no calibration security capability.)
POWER
Scale &
Offset
On / Stby
CAL SECURE
CAL UNSECURE
9
CAL: OFFS1?
CAL: OFFS2?
CAL: GAIN1?
CAL: GAIN2?
CAL: TI QUIK?
CAL: TI FINE?
10
CAL: TIMEBAS?
CODE: 0
CAL COUNT?
HELP: CAL?
HELP: SECURE?
HELP: CODE?
9
This menu item appears and calibration is permitted only if calibration is unsecure. Enter in the correct code
to change calibration to secure; refer to the section titled “Using the Calibration Menu” in Chapter 2 in this guide
for more information.
10 Timebase
1-8
can be automatically calibrated only if the timebase option is installed.
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Chapter 1 Getting Started
The Display Annunciators at a Glance
The Display Annunciators at a Glance
1
MHz
µs
Gate
Period Freq +Wid -Wid Rise Fall Time Ch 1 Ch 2 Ch 3 Limit ExtRef
Annunciator
Indication
Period
Counter is set to measure Period.
Freq
Counter is set to measure Frequency.
+Wid
Counter is set to measure Positive Pulse Width.
−Wid
Counter is set to measure Negative Pulse Width.
Rise
Counter is set to measure Rise Time. (The Time annunciator is also
turned on when the Rise annunciator is on.)
Fall
Counter is set to measure Fall Time. (The Time annunciator is also
turned on when Fall annunciator is on.)
Time
Counter is set to measure Time Interval. (The Time annunciator is
also turned on when the Rise or Fall annunciator are on.)
Ch 1
Counter’s channel 1 is selected to measure an input signal.
Ch 2
Counter’s channel 2 is selected to measure an input signal.
Ch 3
Counter’s channel 3 is selected to measure an input signal.
Limit
Counter is limit testing and the current measurement exceeds the
user-entered limits.
ExtRef
Counter is set to use the signal connected at rear panel Ref In
connector as the timebase (TIMEBAS: EXT); or Counter is set to
automatically (TIMEBAS: AUTO) select the timebase and has chosen
the signal connected at the rear panel Ref In connector.
Hz
The displayed data is in units of Hertz.
M
The prefix for the units of the displayed data is mega (106).
µ
The prefix for the units of the displayed data is micro (10−6).
s
The displayed data is in units of seconds.
Gate
The gate is open. Before a measurement starts, this annunciator is
OFF, indicating the gate is closed. During a measurement, the
annunciator is ON, indicating the gate is open.
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1-9
Chapter 1 Getting Started
The Display Special Character at a Glance
1
The Display Special Character at a Glance
MHz
µs
Gate
Period Freq +Wid -Wid Rise Fall Time Ch 1 Ch 2 Ch 3 Limit ExtRef
Special Character
Description
A placeholder that indicates this digit is not significant.
The Limit Test Graph Characters at a Glance
Freq
Special Character
Ch 1
Description
The colons represent the lower and upper limits.
The asterisk represents the last measurement.
or
1-10
These marks indicate that the last measurement was
significantly past the limit in the direction indicated.
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Chapter 1 Getting Started
The Rear Panel at a Glance
The Rear Panel at a Glance
1
1
2
3
3
I
N
P
U
T
S Ext
Arm
!
Ref
In
AC LINE:
ISM 1-A
SERIAL PLATE
2
1
60 VA
100 - 120 VAC 50/60/400 Hz
200 - 240 VAC
50/60 Hz
WARNING: NO OPERATOR SERVICEABLE PARTS INSIDE, REFER SERVICING TO SERVICE TRAINED PERSONNEL.
92
FOR LABORATORY USE BY
QUALIFIED PERSONNEL
FOUR USAGE EN LABORATOIRE
PAR PERSONNEL QUALIFIE
OPTIONS
001 MS Oven
010 HS Oven
HP-IB
Talk Only
To Configure:
Hold Recall during turn-on.
10 MHz Out
Osc Adjust
RS - 232
WARNING: FOR CONTINUED FIRE PROTECTION, USE SPECIFIED ~ LINE FUSE.
4
5
6
7
8
9
1 Rear-panel input connectors (optional)
6 10 MHz Output connector
2 Power module (Senses incoming voltage
and automatically selects proper setup.)
7 GPIB (IEEE-488.1)
interface connector
3 Fan
8 Oscillator Adjust potentiometer (This
potentiometer is not present for options
001, 010, and 012.)
4 External Arm input connector
5 External Reference Input connector
9 RS-232 interface or Limit
Output connector
NOTE
It is normal operation for the fan in the Counter to continue to run after the Counter is
placed in Standby mode. Power to the timebase is continuous to maintain long term
measurement reliability, and the fan helps maintain timebase temperature stability.
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1-11
Chapter 1 Getting Started
Making Measurements
1
Making Measurements
One of the first things you will want to do with your Agilent 53131A/132A Universal
Counter is to become acquainted with its front panel. Therefore, we have written the
procedures in this section to familiarize you with some of its controls. The following
procedures are provided:
•
First you are shown how to turn on the Counter and measure the frequency of a
signal applied to the Counter’s input channels.
•
Second, you are shown how to use the input coupling, impedance, and
trigger/sensitivity keys to set the input conditions of the appropriate input
channel to match the signal being measured.
•
Third, you are shown how to scale and offset the measurement result.
•
Fourth, you are shown how to set upper and lower limits for measurements.
•
Fifth, you are shown how to enable the Counter to compute statistics (such as
standard deviation) and display statistics of measurements.
•
Last, you are shown how to use the Run and Stop/Single keys to control
measurements.
The order of the procedures in this chapter is the recommended order for making
measurements with this Counter.
Study and refer to the following legend, as needed, to understand the meaning of the
icons which are used throughout this chapter.
1-12
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Chapter 1 Getting Started
Making Measurements
Legend
2
5
3
4
6
7
8
9
10
1
1
11
1 Press key one time and
release
4 Press and hold
2 Press key two times and
release
6 Auto operation
10 Indicator on
7 Connect signal
11 Indicator flashing
8 Disconnect signal
5 Result
9 Indicator off
3 Repeated key presses
To Measure Frequency
POWER
MHz
µs
Gate
Period Freq +Wid -Wid Rise Fall Time Ch 1 Ch 2 Ch 3 Limit ExtRef
On / Stby
Freq
Ch 1
Freq
Ch 1
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1-13
Chapter 1 Getting Started
Making Measurements
NOTE
1
Earlier versions of the Counter do not momentarily display the GPIB address at
turn-on.
Connect (for demonstration purposes) the Counter’s rear-panel 10 MHz Out signal to
CHANNEL 1 input as shown in the illustrated procedure, below.
CHANNEL 1
MHz
!
Gate
Freq
Ch 1
Damage Lvl:
5V rms MAX.50Ω
The Counter will automatically display the measured frequency of the input signal.
Disconnect the demonstration signal from CHANNEL 1, and connect it to
CHANNEL 2 as shown in the following steps.
CHANNEL 1
MEASURE
Freq &
Ratio
Time &
Period
Other
Meas
Gate &
ExtArm
!
Damage Lvl:
5V rms MAX.50Ω
CHANNEL 2
!
Freq
Ch 1
Freq
Ch 1
Damage Lvl:
5V rms MAX.50Ω
Freq &
Ratio
Freq &
Ratio
Freq
Ch 2
Freq
Ch 2
MHz
Gate
1-14
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Chapter 1 Getting Started
Making Measurements
Again, the Counter will automatically display the measured frequency of the input
signal.
To Select Input Coupling and Impedance
Remember, the input signal is still connected to CHANNEL 2.
Selecting Input Coupling
CHANNEL 2
Trigger
Sensitivity
DC
AC
50Ω
1MΩ
!
DC
AC
X10
Attenuate
Damage Lvl:
5V rms MAX. 50Ω
100kHz
Filter
Display 1, 7/13/92
Channel 2’s input coupling is now set to dc.
If you want to change the coupling back to the default ac coupling, perform the
following step.
DC
AC
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1-15
1
If you need or want to change CHANNEL 2’s coupling, impedance, and triggering
conditions to match the input signal you are trying to measure, the next procedures
“To Select Input Coupling and Impedance” and “To Set Input Channel Trigger
Level/Sensitivity” demonstrate this. Perform these procedures whether or not you
want to customize the Counter’s input conditions to measure your signal; doing this
will help you become familiar with the DC/AC, 50Ω/1MΩ, and Trigger/Sensitivity
keys.
Chapter 1 Getting Started
Making Measurements
Selecting Input Impedance
1
50Ω
1MΩ
Channel 2’s input impedance is now set to 50Ω.
NOTE
The “arrow” keys can also be used to toggle the state of toggle keys (DC/AC,
50Ω/1MΩ, etc.) as indicated by the flashing indicator within the arrow keys. However,
for simplicity in this procedure, use the corresponding toggle key to change states.
If you want to change the input impedance back to the default 1 MΩimpedance,
perform the following step.
50Ω
1MΩ
MHz
Gate
Freq
1-16
Ch 2
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Chapter 1 Getting Started
Making Measurements
To Set Input Channel Trigger Level/Sensitivity
Changing Trigger Mode
1
Trigger
Sensitivity
Press any one of these arrow keys to toggle to the next state of Auto Trigger.
+/–
Enter
Modifying Input Trigger Level
The leftmost “0” digit in the LEVEL display is highlighted, indicating that if you
press the d key once the displayed value will increase to 1.000 volt as shown in the
following step.
NOTE
BE SURE to always press the Enter key to complete numeric data entries.
Channel 2’s trigger level is now set to +1V.
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1-17
Chapter 1 Getting Started
Making Measurements
1
To set the trigger level to −0.05V, perform the following steps.
+/–
Enter
NOTE
BE SURE to always press the Enter key to complete numeric data entries.
Channel 2’s trigger level is now set to −0.05V.
Selecting Input Trigger Slope
Trigger
Sensitivity
Display 1, 7/13/92
Display 1, 7/13/92
1-18
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Chapter 1 Getting Started
Making Measurements
Selecting Input Sensitivity
1
Trigger
Sensitivity
Display 1, 7/13/92
Display 1, 7/13/92
Display 1, 7/13/92
Starting the Measurement
Run
MHz
Gate
Freq
Ch 2
The Run key initiates repetitive measurements, and is described in the section titled
“To Control Measurement” at the end of this chapter.
To Select Scale and Offset
The Scale & Offset key allows for multiplication and addition, respectively, of the
measurement by user-specified constants. Modification of the displayed measurement
by these Math operations is represented by the following equation:
(Measurement × Scale) + Offset = Displayed Results
The Scale and Offset Math operations can be used, for example, to subtract
systematic errors or display the percentage difference between signals.
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1-19
Chapter 1 Getting Started
Making Measurements
Entering the Scale Value
1
Scale &
Offset
To demonstrate the Scale Math operation, set Scale to 10 as shown in the following
steps.
Press and hold the d key until the value of Scale is 10 as shown in the following step.
Enter
NOTE
BE SURE to press the Enter key to enter the value of 10.
The Scale is now set to 10, and MATH has been enabled. The Scale & Offset
indicator is now lit to show that MATH is enabled. Since MATH is enabled, the
results are being scaled and offset.
1-20
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Chapter 1 Getting Started
Making Measurements
Entering the Offset Value
To demonstrate the Offset Math operation, set the Offset to 1 MHz as shown in the
following steps.
1
Scale &
Offset
At this point, pressing the s key will cause the Counter to display the full display of
the Offset value as shown in the following step.
Press the s key six more times to cause the Counter to display your entry in Mega
units as shown in the following step.
M
The leftmost “0” digit in the OFFSet display is highlighted, indicating that if you
press d key once the displayed value will increase to 1 Mega (that is, 1E6) as shown
in the following step.
M
Enter
M
NOTE
BE SURE to press the Enter key to enter the 1 Mega value.
The Offset is now set to 1 Mega.
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1-21
Chapter 1 Getting Started
Making Measurements
Displaying the Math Results
1
Run
M
Freq
Ch 2
The Counter displays the modified measurement results, which are based
on the scale and offset values that you selected in the previous steps. That is, the 101
represents the original 10, scale multiplied by 10, then offset by 1.
(For more details and real applications of the Math Scale and Offset operations, refer
to the appropriate section in Chapter 2, “Operating Your Universal Counter.”)
Disabling Math
Scale &
Offset
Display 1, 7/13/92
Display 1, 7/13/92
Note that the Scale & Offset key indicator is now off.
NOTE
DO NOT cycle POWER because you will need to use these Scale and Offset values
in the following procedure “To Set Limits of Measurements.” Continue to the
following procedure.
1-22
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Chapter 1 Getting Started
Making Measurements
To Set Limits of Measurements
Scale &
Offset
Display 1, 7/13/92
Display 1, 7/13/92
Run
M
Freq
Ch 2
The result of this Math operation is a measurement of 101 MHz.
(Measurement × Scale) + Offset = Result
(10 MHz × 10) + 1Mega = 101 Mega
Now, set the upper limit to 102 Mega and the lower limit to 100 Mega by performing
the following procedures. (Figure 1-1 and Figure 1-2 illustrate the limits settings.)
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1-23
1
To demonstrate how Math and Limits work together, use the Scale (10) and Offset (1
Mega) values selected in the previous procedure “To Select Scale and Offset.” Enable
Math by performing the following steps.
Chapter 1 Getting Started
Making Measurements
Setting the Upper Limit
1
LIMITS
Uppr &
Lower
Limit
Modes
Press the s key six more times to cause the Counter to display your entry in Mega
units as shown in the following step.
M
M
The leftmost “0” digit in the UPPR display is highlighted as shown above, indicating
that each press of the d key will increase the displayed value.
1-24
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Chapter 1 Getting Started
Making Measurements
M
1
M
M
Enter
M
NOTE
BE SURE to press the Enter key to enter the 102 Mega value.
1
2
1 102 Mega Upper Limit
2 101 Mega Scale/Offset Measurement
Figure 1-1. 102 Mega Upper Limit Setting
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1-25
Chapter 1 Getting Started
Making Measurements
Setting the Lower Limit
1
Uppr &
Lower
Press the arrow keys as shown in the following steps to set the lower limit value.
Press the s key six more times to cause the Counter to display your entry in Mega
units as shown in the following step.
M
M
M
Enter
M
1-26
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Chapter 1 Getting Started
Making Measurements
NOTE
BE SURE to press the Enter key to enter the 100 Mega value.
Limits should now be set as shown in Figure 1-2.
1
1
2
3
1 102 Mega Upper Limit
2 101 Mega Scale/Offset Measurement
3 100 Mega Lower Limit
1
2
3
4
Figure 1-2. 100 Mega Lower and 102 Mega Upper Limits Settings
Figure 1-3 represents what transpired during this Math and Limits procedure.
1 Raw Measurements
3 Limits
2 Math
4 Measurements (Scale/Offset Results)
within Limits
Figure 1-3. Math and Limits Results
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1-27
Chapter 1 Getting Started
Making Measurements
1
Setting the Counter to Flag and Stop Measuring On Out-of-Limit
Measurements
If you want the Counter to stop measuring when the signal exceeds the limits (102 to
100 Mega) that you entered in the previous procedure, perform the following steps to
select the STOP choice in the ON FAIL display. (Note that ON FAIL: GO ON is the
default state after power-up.)
Limit
Modes
Run
M
Gate
Freq
Ch 2
The current modified measurement of the input signal applied to CHANNEL 2 is
displayed.
Since the Counter is now in the stop-on-fail mode, the Limit annunciator in the
display will light and the Counter will stop making measurements when a
measurement exceeds the limits you set.
1-28
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Chapter 1 Getting Started
Making Measurements
Setting the Counter to Flag On Limits But Continue Measuring
Limit
Modes
Run
M
Gate
Freq
Ch 2
The current modified measurement of the input signal applied to CHANNEL 2 is
displayed.
Since the Counter is now in the go-on-fail mode, the Limit annunciator in the display
will light each time a measurement exceeds the limits you set. However, the Counter
will continue to make measurements.
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1-29
1
Perform the following steps to select the GO ON choice in the ON FAIL display if
you want the Counter to continue measuring even though an measurement result
exceeds the limits previously entered.
Chapter 1 Getting Started
Making Measurements
Disabling Limit Testing
1
Limit
Modes
The Counter is now making measurements without limit testing.
Disabling Math
The Counter is now making measurements without the scale/offset values calculated
into the measurements.
1-30
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Chapter 1 Getting Started
Making Measurements
To Perform Statistics on Measurements
Selecting the Type of Statistics (Stats)
MATH
Stats
Scale &
Offset
Stats
Updating the SHOW configuration caused Stats to be enabled. The Stats indicator is
now lit.
Stats
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1-31
1
Suppose you want the Counter to compute and display the standard deviation of the
current input data (which is the 10 MHz signal applied to CHANNEL 2). Also, you
want the Counter to make 20 measurements before it computes the standard
deviation. Perform the following steps.
Chapter 1 Getting Started
Making Measurements
NOTE
BE SURE to press the Enter key to enter the value of 20.
1
The Counter is now set to make statistics based on 20 measurements.
Run
Hz
Freq
Ch 2
Freq
Ch 2
Gate
Hz
Gate
Freq
Ch 2
In this case, the displayed standard deviation value is computed on all measurements
of the 10 MHz signal since no limits were set.
Computing Stats on Filtered Data Only
A special feature of the Counter allows you to use the upper and lower limits to filter
data before statistical processing or computation as shown in Figure 1-4.
1 Raw Measurements
3 Filtered data (USE: IN LIMIT)
2 Limits
4 Statistics
Figure 1-4. Filtering Data Before Statistical Computation
1-32
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Chapter 1 Getting Started
Making Measurements
Perform the following steps to select the IN LIMIT choice in the USE display if you
want the Counter to compute statistics on only frequency measurements within the
limits you set.
1
Stats
Display 1, 7/13/92
Display 1, 7/13/92
Since the Limits were set to 101 Mega and 102 Mega values that are based on a scale
of 10 and offset of 1 Mega, you must re-enable Math now to get the measurements to
be within the limits. Perform the following steps.
Scale &
Offset
Display 1, 7/13/92
Display 1, 7/13/92
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1-33
Chapter 1 Getting Started
Making Measurements
1
Displaying Stats After Filtering Data of Input Signal
Let’s assume you have set the upper and lower limits for the input signal, and selected
the IN LIMIT (filtering) choice. Now, perform the following steps to display the
standard deviation of the filtered measurements. (Note that the first step in the
following procedure is optional since you should have already set Stats to show
standard deviation at the beginning of this Stats procedure. But, you may want to
perform the step anyway to verify that the Counter is displaying the standard
deviation of the measurement.)
Stats
Display 1, 7/13/92
Run
Freq
Ch 2
Freq
Ch 2
Freq
Ch 2
Gate
Gate
The standard deviation value shown in the previous illustration is for demonstration
purposes. The statistic is computed using only those measurements which fell within
the limits you set.
(For more details on the Stats and Limits functions, refer to the appropriate sections in
Chapter 2, “Operating Your Universal Counter.”)
Now, disable Math and Stats as shown in the following procedure.
1-34
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Chapter 1 Getting Started
Making Measurements
Disabling Stats and Math
Stats
1
Scale &
Offset
Display 1, 7/13/92
Display 1, 7/13/92
Run
MHz
Gate
Freq
Ch 2
The Counter is now making and displaying normal measurements (that is, the
Counter is not showing statistics or scale/offset results).
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1-35
Chapter 1 Getting Started
Making Measurements
To Control Measurement
1
Run
Single/
Stop
Use these two keys to control the measurement of the Counter. The Run key provides
repetitive measurements, whereas the Stop/Single key allows you to make one
measurement.
With the 10 MHz signal still connected to CHANNEL 2, perform the following steps
so you can better understand the Run and Stop/Single operations.
Run
MHz
Gate
Freq
Ch 2
The Counter is now making repetitive measurements (continuously making “live”
measurements).
The Counter stopped making measurements. The Gate annunciator is not lit. Hence,
pressing the Stop/Single key while the Counter is making measurements (in Run)
causes the Counter to stop after the measurement in progress is completed. If you
press the Stop/Single key again while the Counter is stopped, the Counter will make a
single measurement and then stop—the Gate annunciator will light one time,
momentarily.
If you press the Stop/Single key while the Counter is stopped and when the Stats
menu item ON SINGLE is set to N, the Counter will make N measurements and then
stop. This enables a set of statistics to be computed.
While the Counter is still stopped, perform the following step.
Run
MHz
Gate
Freq
Ch 2
The Counter is making repetitive measurements again.
1-36
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2
Operating Your Universal Counter
Operator’s Reference
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Chapter 2 Operating Your Universal Counter
Introduction
Introduction
This is the operator’s reference chapter which contains information and procedures
for the front-panel keys, operating functions, and menus of the Agilent 53131A/132A
225 MHz Universal Counter.
2
Chapter Summary
•
How this Counter Works for You
page 2-4
•
Using the Measurement Control Keys (Run and Stop/Single)
page 2-5
•
Using Entry/Select (Arrow) Keys
page 2-8
•
Using the MEASURE Menu Keys
page 2-10
•
Using the Gate & External Arm Menu Key
page 2-16
•
Using the MATH Menu Keys
page 2-27
•
Using the LIMITS Menu Keys
page 2-37
•
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
page 2-44
•
Using the Save and Recall Menus
page 2-52
•
Using the Print Menu
page 2-56
•
Using the Utility Menu
page 2-57
•
Using the Calibration Menu
page 2-67
•
Front Panel Display Messages
page 2-73
•
Preset Values After Power-Up and *RST
page 2-78
•
Summary of the Measurement Sequence
page 2-93
•
Common Questions
page 2-94
2-2
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Chapter 2 Operating Your Universal Counter
Introduction
Where to Find Some Key Working Examples
Example Procedure for Gate and External Arm
page 2-24
•
Example Procedure for Changing the Number of
Digits of Resolution Displayed for More Precise Measurements
page 2-25
•
Example Procedure for Scale Function
page 2-28
•
Example Procedure for Offset Function
page 2-29
•
Example Procedure for Turning Off Math Mode
page 2-30
•
Example Procedure for Setting the Offset From
the Last Measurement Value
page 2-31
•
Example Procedure for Computing Stats
page 2-33
•
Example Procedure for Easy Viewing of Stats
page 2-34
•
Limits Testing Example 1—Flag and Stop Measuring On Limits
page 2-38
•
Limits Testing Example 2—Flag On Limits but
Continue Measuring
page 2-40
•
Limits Testing Example 3—Use Analog Graph Display While
Adjusting Input Signal
page 2-40
•
Limits Testing Example 4—Selecting Filtering Conditions of Stats page 2-42
Computation
•
Limits Testing Example 5—Sending the Limit-Detect Output to
the RS-232 Serial Port
2
•
page 2-43
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2-3
Chapter 2 Operating Your Universal Counter
How this Counter Works for You
How this Counter Works for You
The following text lists some of the key things the Counter does for you.
The Counter presets the menus to default states and values at power-up (refer to
Table 2-7A for a detailed list of the preset values). Cycling the POWER key
presets the Counter.
•
The Counter’s Utility menu allows you to select such things as timebase source,
GPIB configuration, and RS-232 serial port configuration. After your selections,
the Counter automatically stores all these selections in non-volatile memory
(except the timebase source); thus, these settings (except timebase source) will
not change when power has been off or after a remote interface reset.
•
The Counter automatically displays measurement(s) in a couple of seconds after
you select a measurement function (e.g., Period).
•
The Counter accepts your numeric entry for a menu item after you press the
Enter key. You MUST press the Enter key to complete numeric entry.
•
The Counter automatically enables Limits when you enter a numeric value for
upper and/or lower limits, or update any menu item in the Limit Modes menu.
•
The Counter automatically enables Math after you enter a numeric value for scale
and offset.
•
The Counter performs Statistical analyses for you, and will enable Stats when
you update any item in the Stats menu.
•
The Counter automatically disables Limits, Math, and Stats when you select
another measurement function.
•
The Counter saves measurement setup(s).
•
The Counter instantly recalls the measurement setup you want to use.
•
The Counter prints out your measurement and analysis data.
2
•
2-4
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Chapter 2 Operating Your Universal Counter
Using the Measurement Control Keys (Run and Stop/Single)
Using the Measurement Control Keys (Run and
Stop/Single)
Overview of the Measurement Control Keys
Run
Stop/
Single
Two measurement control keys are provided on the Agilent 53131A/132A Counter:
Run and Stop/Single. In general, the Run key provides repetitive measurements
while the Stop/Single key allows you to make single-shot measurements.
The Run key allows you to:
2
•
put the Counter into a continuous measurement loop.
•
exit any measurement after your selection of another measurement function.
•
abort the current measurement by starting a new measurement (if already in Run
mode or in Single mode with a measurement in progress). This also clears any
statistics being processed.
The Stop/Single key allows you to:
•
put the Counter into Single mode (if the Counter was in Run mode) where one
measurement is taken with each Stop/Single keypress. (Stats menu item ON
SINGLE should be set to 1.)
•
put the Counter into Single mode (if the Counter was in Run mode) where N
measurements are taken with each Stop/Single keypress. (Stats menu item ON
SINGLE should be set to N.)
•
stop (abort) the current measurement (if the Counter was in Single mode).
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2-5
Chapter 2 Operating Your Universal Counter
Using the Measurement Control Keys (Run and Stop/Single)
To Use the Measurement Control Keys
The following procedure demonstrates how these keys function.
1
Connect power source to Counter, and turn on Counter.
All segments of the front-panel display will light up while the Counter performs its
power-on self-test, and then dashes are displayed. The Counter is now ready to
measure frequency of a signal applied to CHANNEL 1 input. Note that the Freq and
Ch1 annunciators light.
Connect an input signal to CHANNEL 1.
2
2
The Counter automatically displays the measured frequency of the input signal. Note
that the Run key indicator is ON.
3
Press Stop/Single key.
The Counter is put into Single mode and the current measurement is completed. One
measurement is taken with each press of Stop/Single key. Note that the Stop/Single
key indicator is ON.
4
Press Run key.
The Counter aborts any measurement in progress, and starts making repetitive
measurements. That is, the Counter is in a continuous measurement loop.
5
Press Stop/Single key.
The Counter is put into Single mode.
6
Press Stats key until ON SINGLE menu item appears, then press any one of the
arrow keys to set ON SINGLE menu item to N.
The Counter is set to take N measurements on each Stop/Single keypress. The state of
ON SINGLE menu item affects the Stop/Single key operation while statistics are
enabled.
Observe that the Stats indicator is ON. This indicates statistical processing is enabled.
2-6
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Chapter 2 Operating Your Universal Counter
Using the Measurement Control Keys (Run and Stop/Single)
7
Press Stop/Single key.
One set of N frequency measurements is taken with each press of the Stop/Single key.
One set of statistics is computed with each press of the Stop/Single key.
8
Press Stats key until SHOW menu item appears.
9
Press any one of the arrow keys to select a statistical result to display, and press Enter
key.
The Counter is now displaying one of the statistical results.
2
10
Press Stop/Single key.
One set of N frequency measurements is taken with each press of the Stop/Single key.
At the completion of the Nth measurement, the Counter displays the statistical result
selected in step 9.
11
Press Stats key until ON SINGLE menu item appears, then press any one of the
arrow keys to set ON SINGLE menu item to 1.
The Counter is set to take one measurement on each Stop/Single keypress.
Disabling the statistics (with the STATS: OFF menu item) is another way to cause
the Stop/Single key to initiate one measurement at time.
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2-7
Chapter 2 Operating Your Universal Counter
Using Entry/Select (Arrow) Keys
Using Entry/Select (Arrow) Keys
There are six entry/select keys of which four are “arrow” keys. The function of the
four arrow keys and the Enter key depends on the Counter’s operating mode (that is,
numeric entry, state changing, sequencing through choices in a menu, etc.). This
section describes how the keys perform in the different operating modes.
2
To Use During Numeric Entry
+/–
Enter
•
Use the s key to move left to select adjustable digits (it does not wrap around).
•
Use the g key to move right to select adjustable digits (it does not wrap around).
•
Use the d key to increment the selected (highlighted) digit of the displayed value.
•
Use the f key to decrement the selected (highlighted) digit of the displayed value.
•
Use the +/−key to change the sign of the numeric value.
•
Use the Enter key to complete a numeric entry. (If a numeric entry is changed
and the Enter key is NOT pressed, then the value is not changed.)
To Use When Sequencing Through the Measurement Function
Menus (Freq & Ratio, Time & Period, Other Meas) and the Recall
Menu
•
Use the d or s key to go back to the previous choice in a function or recall menu.
Repeatedly pressing this key will cycle through (and loop around) the list of
choices.
•
Use the f or g key to go forward or to the next choice in a function or recall menu.
Repeatedly pressing this key will cycle through (and loop around) the list of
choices.
•
Use the Enter key to select the function or execute the recall, or wait for the
menu to time out for automatic selection/execution.
2-8
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Chapter 2 Operating Your Universal Counter
Using Entry/Select (Arrow) Keys
To Use During State Changing (ON/OFF, LO/MED/HI, etc.)
•
–
Gate & ExtArm
–
Limit Modes
–
Scale & Offset
–
Stats
–
Trigger/Sensitivity
–
50Ω/1MΩ
–
DC/AC
–
X10 Attenuate
–
100kHz Filter
–
Save & Print
–
Utility Menu
2
•
Press any of the arrow keys to toggle or change to the next state of the
parameters found in the following menus:
The Enter and +/−keys are ignored during the state changing operating mode.
To Use on Prompted Event Messages (SET OFFSET ?, CAL:
OFFS n ?, TEST: ALL?, etc.)
•
For SET OFFSET ?, and all the TEST: ? prompted event messages, press
Enter key to start the event.
•
For CAL: OFFS n ? and GAIN n ?, press Enter key to display instructions.
Press Enter key again to start the event.
To Use on Prompted Help Messages (MATH HELP ?, PRINT
HELP ?)
•
When MATH HELP ? is displayed, press Enter key to display the “(MEAS x
SCALE) + OFFS = RESULT” message.
•
When PRINT HELP ? is displayed, press Enter key to display the
“CONFIGURE PORT ON UTILITY MENU; REMEMBER TO SAVE
SETUP FIRST” instruction.
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2-9
Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
Using the MEASURE Menu Keys
Overview of the MEASURE Menus
The measurement function menus are divided into three categories:
MEASURE
Time &
Period
Other
Meas
Gate &
ExtArm
•
Frequency measurements on channel 1, 2, or 3 (optional) and ratio of frequencies
between channels.
•
Time interval, period, and pulse characterization measurements. (The Agilent
53131A/132A provides one key-press operation for such pulse measurements as
risetime, falltime, pulse width, etc., which have traditionally required multiple
key presses or operations.)
•
Other measurements (dutycycle, phase, peak voltage, and totalize).
2
Freq &
Ratio
Table 2-1. Menus of the MEASUREment Keys
Freq & Ratio Key
Time & Period Key
Other Meas Key
FREQUENCY 1
REQUENCY 2
REQUENCY 3 (optional)
ATIO 1 TO 2
ATIO 1 TO 3 (optional)
ATIO 2 TO 1
RATIO 3 TO 1 (optional)
TI 1 TO 2
PERIOD 1
RISETIME 1
FALLTIME 1
POS WIDTH 1
NEG WIDTH 1
TOTALIZE 1
PHASE 1 TO 2
DUTYCYCLE 1
VOLT PEAKS 1
VOLT PEAKS 2
To sequence through the menus of the MEASUREment function keys (Freq & Ratio,
Time & Period, and Other Meas keys), you simply need to repeatedly press the
appropriate MEASURE key to cycle through (and loop around) the menus under the
key. Each press of a MEASURE key will advance the Counter to the next
measurement function in the menu.
NOTE
The menus under the MEASURE keys will terminate (select function and return to
measurement result display) after two seconds.
2-10
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Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
To Measure Frequency
1
Connect power source to Counter, and turn on Counter.
All segments of the front-panel display will light up while the Counter performs its
power-on self-test, and then dashes are displayed. The Counter is now ready to
measure frequency of a signal applied to CHANNEL 1 input. Note that the Freq and
Ch1 annunciators light.
2
Connect an input signal to CHANNEL 1.
To set up CHANNEL 1’s coupling, impedance, and triggering conditions to match the
input signal you are trying to measure, refer to the procedures “To Select Input
Coupling and Impedance” and “To Set Input Channel Trigger Level/Sensitivity” in
Chapter 1, “Getting Started,” or the section titled “Using CHANNEL 1 and
CHANNEL 2 Input Conditioning Keys” in this chapter.
3
Press the Freq/Ratio key until FREQUENCY 2 is displayed to measure the
frequency of an input signal applied to CHANNEL 2.
FREQUENCY 2 is momentarily displayed, the Freq and Ch2 annunciators light,
and the Counter is ready to measure frequency of a signal applied to CHANNEL 2
input. The trigger levels are set to the 50% points of the signal. However, you may
disable auto triggering, and change the trigger levels and slopes.
4
To measure the frequency of a signal applied to optional CHANNEL 3 input, repeat
step 3 until FREQUENCY 3 is displayed.
FREQUENCY 3 will be momentarily displayed and the Freq and Ch3 annunciators
will light. The Counter will be ready to measure the frequency of a signal applied to
CHANNEL 3 input.
Note that the Frequency 3 menu item is not available in Counters that do not contain
optional Channel 3.
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2-11
2
The Counter should automatically display the measured frequency of the input signal.
The trigger levels are set to the 50% points of the signal. However, you may disable
auto triggering, and change the trigger levels and slopes.
Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
To Measure Frequency Ratio
1
Press Freq & Ratio key until RATIO 1 TO 2 is displayed.
RATIO 1 TO 2 is momentarily displayed, the Freq, Ch1, and Ch2 annunciators
light, and the Counter is ready to measure and display the frequency ratio of a signal
applied to CHANNEL 1 in relation to a signal applied to CHANNEL 2 (Ch1/Ch2).
The trigger levels are set to the 50% points of each signal. However, you may disable
auto triggering, and change the trigger levels and slopes.
Note the result is not scaled by 100; it is not a percentage.
2
Note that RATIO 2 TO 1 is also available (Ch2/Ch1).
2
To measure the frequency ratio between a signal applied to CHANNEL 1 input and a
signal applied to Option 030/050 CHANNEL 3 input, repeat step 1, above.
RATIO 1 TO 3 will be momentarily displayed and the Freq, Ch1, and Ch3
annunciators will light. The Counter will be ready to measure the frequency ratio of a
signal applied to CHANNEL 1 in relation to a signal applied to CHANNEL 3
(Ch1/Ch3).
Note that the Ratio 1 to 3 menu item is not available in Counters that do not contain
optional Channel 3.
Note the result is not scaled by 100; it is not a percentage.
Note that RATIO 3 TO 1 is also available (Ch3/Ch1).
By pressing the Freq & Ratio key, the Counter will return to the Frequency 1
measurement mode; this demonstrates the loop around feature of the measurement
function menu keys.
The front-panel “arrow” (or entry/select) keys can also be used when sequencing
through the measurement function menus. Refer to the section titled “Using
Entry/Select (Arrow) Keys” for details.
2-12
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Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
To Measure Time Interval
Press Time & Period key until TI 1 TO 2 is displayed.
The trigger levels are set to the 50% points of each signal. However, you may disable
auto triggering, and change the trigger levels and slopes.
To Measure Period
Press Time & Period key until Period 1 is displayed.
Period 1 is momentarily displayed, the Period and Ch1 annunciators light, and the
Counter is ready to measure the period of a signal applied to CHANNEL 1.
To Measure Rise/Fall Times
Press Time & Period key until RISETIME 1 or FALLTIME 1, depending on which
measurement you want to make, is displayed.
RISETIME 1 or FALLTIME 1 is momentarily displayed, and the Rise or Fall,
Time, and Ch1 annunciators light. The risetime and falltime modes of operation
automatically configure the Counter to perform risetime or falltime measurements
through CHANNEL 1 input. The triggering is automatically set to AUTO TRIG: ON.
In the risetime and falltime modes, AUTO TRIG automatically locates the 10% and
90% points of the input signal, and sets the trigger levels accordingly. You may
override these automatic selections if you want.
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2-13
2
TI 1 TO 2 is momentarily displayed, the Time, Ch1, and Ch2 annunciators light, and
the Counter is ready to measure the length of time between a start event on
CHANNEL 1 and a stop event on CHANNEL 2. The Counter is automatically set to
measure from separate signal sources. (The start and stop events may be derived
from separate signal sources, or they may be from a single source. Refer to the
section in this chapter titled “Using CHANNEL 1 and CHANNEL 2 Input
Conditioning Keys” for specifics in performing Time Interval measurements on
a single source—COMMON 1: ON). Independent slope, trigger level, and
sensitivity controls for the start and stop events allow variable triggering on either
positive- or negative-going slopes.
Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
To Measure Positive/Negative Pulse Widths
Press Time & Period key until POS WIDTH 1 or NEG WIDTH 1, depending on
which measurement you want to make, is displayed.
POS WIDTH 1 or NEG WIDTH 1 is momentarily displayed, and the +Wid or −
Wid, and Ch1 annunicators light. The pulse width measurement automatically
configures the Counter to perform positive or negative pulse width measurements
through CHANNEL 1 input. The AUTO TRIG is set to trigger at the 50% point of the
signal.
2
To Measure Duty Cycle
Press Other Meas key until DUTYCYCLE 1 is displayed.
DUTYCYCLE 1 is momentarily displayed, the Ch1 annunciator lights. The
dutycycle mode of operation is ready to measure a continuous waveform applied to
CHANNEL 1 input. The input is automatically set to common-channel 1, and
triggering set to AUTO TRIG: ON. The trigger levels are set to the 50% points of
each signal. However, you may disable auto triggering, and change the trigger levels.
Results will range from 0 to 1. The dutycycle is defined as the positive pulse width
divided by the period. (Note that the result is not scaled by 100; it is not a percentage.)
To Make Totalize Measurements
Press Other Meas key until TOTALIZE 1 is displayed.
TOTALIZE 1 is momentarily displayed, the Ch1 annunciator lights, and the Counter
is in its totalize mode. Auto-triggering is automatically disabled on CHANNEL 1
since there may not be a suitable signal at the beginning of the measurement. The
totalize mode of operation displays the number of counts (events) received through
CHANNEL 1. The count is continuously displayed if GATE: AUTO is selected.
The totalize measurement is cleared to zero when the totalize function is first
invoked, when the front-panel Run key is pressed, or when the Stop/Single key is
pressed.
2-14
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Chapter 2 Operating Your Universal Counter
Using the MEASURE Menu Keys
To Make Phase Measurements
Press Other Meas key until PHASE 1 TO 2 is displayed.
PHASE 1 TO 2 is momentarily displayed, the Ch1 and Ch2 annunicators light, and
the Counter is ready to measure the phase of a signal applied to CHANNEL 1 input
relative to a signal applied to CHANNEL 2 input. The phase difference is displayed
in degrees. If auto triggering is enabled, the trigger levels are set to the 50% points of
each signal. However, you may disable auto triggering, and change the trigger levels
and slopes.
To Measure Positive/Negative Voltage Peaks
Press Other Meas key until VOLT PEAKS 1 or VOLT PEAKS 2, depending on
which measurement you want to make, is displayed.
VOLT PEAKS 1 or VOLT PEAKS 2 is momentarily displayed, the Ch1 or Ch2
annunciator lights, and the Counter is ready to measure minimum and maximum
voltage peaks of signals applied to CHANNEL 1 or CHANNEL 2, respectively.
NOTE
In Voltage Peaks function, the Counter measures the input signal after the signal has
been conditioned by the input settings (impedance, coupling, attenuation, and filter).
One reminder of this is the (AC COUPLED) message, which is displayed when
Voltage Peaks is selected and the measurement channel is ac coupled.
The result is corrected for X10 attenuation.
Note that Arming is not used for Voltage Peaks measurements, and that neither Limits
nor Math is available.
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2-15
2
Use CHANNEL 2 as the reference. One period on CHANNEL 2 will define 360°. If
CHANNEL 1 is leading CHANNEL 2, the pulse result is positive.
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
Using the Gate & External Arm Menu Key
Overview of Gate/External Arming Functions
2
MEASURE
Freq &
Ratio
Time &
Period
Other
Meas
Gate &
ExtArm
Table 2-2 for the Agilent 53131A (and Agilent 53132A with a serial number prefix
below 3646) and Table 2-3 for the Agilent 53132A with a serial number prefix 3646
and above (on page 2-19 and page 2-23, respectively) list the menus for all the arming
configurations, and shows how the Gate and External Arming menu changes as a
function of the measurement and the arming mode.
The Agilent 53131A/132A Counter has four arming modes: auto, external, digits, and
time. However, the Agilent 53131A (or Agilent 53132A with a serial number prefix
below 3646) and Agilent 53132A have different arming capabilities for Time Interval
measurements. Thus, for simplicity, their Time Interval arming capabilities are
discussed in separate subsections.
•
If you are using an Agilent 53131A (or Agilent 53132A with a serial number
prefix below 3646), read the Time Interval Delay arming information starting
on page 2-17.
•
If you are using an Agilent 53132A (with a serial number prefix 3646 and
above), read the Time Interval Delay arming information starting on page 2-20.
Gate/External Arming Capabilities
AUTO Arming
For frequency, period, frequency ratio, risetime, falltime, pulse width, dutycycle, and
phase, auto arming means make individual measurements as fast as possible.
For totalize, auto arming means the Counter starts to count when it is enabled by the
pressing of either the Run or Stop/Single key. The Counter stops counting when the
Stop/Single key is pressed.
2-16
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Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
EXTERNAL Arming
For frequency, period, frequency ratio, and totalize, external arming means you can
control the start of a measurement by using an external signal.
NOTE
When external arming mode is enabled, a signal must be connected to the Counter’s
rear-panel Ext Arm connector.
TIME Arming
For frequency, period, ratio, and totalize, time arming means you can set the gate
time—the length of time for which your signal is measured.
2
NOTE
Gate time and resolution are linked: the longer the gate time, the greater the
resolution. With an increase in resolution, you get a larger number of digits on the
display.
Time arming is demonstrated in the sub-section titled “Example Procedure for Gate
and External Arm.”
DIGITS Arming
For frequency, period, and ratio, digits arming means you can set the number of
digits of resolution that you require your result to provide.
Digits arming is demonstrated in the sub-section titled “Example Procedure for
Changing the Number of Digits of Resolution Displayed for More
Precise Measurements.”
Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Time
Interval DELAY Arming
The DELAY capability (specified in the Time Interval arming menu) provides a
variable delay between the start event (Channel 1) and the enabling of the stop event
(Channel 2) as shown Figure 2-1. Potential stop events are ignored during the
specified delay time.
External arming can also be used to control the start of a measurement by using an
external signal.
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2-17
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
NOTE
When external arming mode is enabled, a signal must be connected to the Counter’s
rear-panel Ext Arm connector.
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
2
ARM: AUTO, DELAY: NONE (standard T.I. measurement)
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
DELAY TIME
ARM: AUTO, DELAY: TIME, TIME: (specified)
EXT ARM INPUT
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
DELAY TIME
ARM: EXTERNL, SLOPE: POS, DELAY: TIME, TIME: (specified)
Figure 2-1. Agilent 53131A (Agilent 53132A S/N Prefix Below 3646) Time
Interval Delay
NOTE
The examples in Figure 2-1 have the input signal applied to Channel 1 with
COMMON 1: ON, Channel 1 SLOPE: POS, and Channel 2 SLOPE: POS.
2-18
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Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
Table 2-2. *Agilent 53131A (Agilent 53132A S/N Prefix Below 3646) Gate & External Arm Key
Menus as a Function of the Measurement and Arming Mode
Freq, Period,
Ratio
Phase
Totalize
RiseTime, Fall Time,
+/−Width, Dutycycle
Time Interval
Auto Arming:
Auto Arming:
Auto Arming:
Auto Arming:
Auto Arming:
GATE:
ARM:
GATE:
ARM:
ARM:
AUTO
AUTO
AUTO
AUTO
AUTO
DELAY: NONE
TIME
TIME:
<time>
GATE: DIGITS
DIGITS: <digits>
2
Digits Arming:
_______________
Time Arming:
GATE:
TIME:
TIME
<time>
_______________
_______________
_______________
_______________
_______________
Time Arming:
_______________
GATE:
TIME:
TIME
<time>
External Arming:
External Arming:
External Arming:
External Arming:
External Arming:
GATE:
ARM:
GATE:
ARM:
ARM:
EXTERNL
START: POS
NEG
STOP:
TIME:
EXTERNL
SLOPE: POS
NEG
AUTO
NEG
POS
TIME
<time>
EXTERNL
START: POS
NEG
STOP:
TIME:
EXTERNL
SLOPE: POS
NEG
NEG
POS
TIME
<time>
EXTERNL
SLOPE: POS
NEG
DELAY:
TIME:
NONE
TIME
<time>
* There is no Gate and External Arm menu available for Voltage Peaks measurements.
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2-19
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
Agilent 53132A (With S/N Prefix 3646 and Above) Time Interval DELAY
Arming
In the following subsections, a leading star (✴) means the parameter affects the
START event. A trailing star means the parameter affects STOP event.
AUTO ARMING (✴START: AUTO)
2
The DELAY✴ (stop delay) capability (specified in the Time Interval arming menu)
provides a variable delay between the start event (Channel 1) and the enabling of the
stop event (Channel 2) as shown in Figure 2-2. Two types of delay are possible: 1)
TIME—potential stop events are ignored during the specified delay time, or
2) EVENT—the measurement is stopped when the specified number of stop events
has occurred.
EXTERNAL ARMING (✴START: EXT)
External arming can be used to control the start, or start and stop, of a measurement
by using an external signal as shown in Figure 2-3.
Set STOP✴ and/or ✴START to EXT to activate.
NOTE
When external arming mode is enabled, a signal must be connected to the Counter’s
rear-panel Ext Arm connector.
The ✴DELAY (start delay) capability (specified when ✴START is set to EXT)
provides a variable delay between the arming event (Ext Arm) and the enabling of the
start of the measurement. Two types of delay are possible: 1) TIME—potential start
events (Channel 1) are ignored during the specified delay time, or 2) EVENT—the
measurement is started after the specified number of Channel 2 events has occurred.
A DELAY✴ (stop delay) as described in AUTO ARMING above can also be used in
conjunction with ✴DELAY (start delay) as shown in Figure 2-3.
2-20
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Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
START: AUTO, DELAY : NONE (standard T.I. measurement)
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
DELAY TIME
2
START: AUTO, DELAY : TIME, T : (specified)
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
DELAY STOP TO 4th EVENT
1
2
3
4
START: AUTO, DELAY : EVENT, E : 4
Figure 2-2. Agilent 53132A (With S/N Prefix 3646 and Above) Auto
Arming
NOTE
The examples in Figure 2-2 have the input signal applied to Channel 1 with
COMMON 1: ON, Channel 1 SLOPE: POS, and Channel 2 SLOPE: POS.
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2-21
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
EXT ARM INPUT
START
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
DELAY STOP TO 4th EVENT
START DELAY TIME
1
2
START: EXT,
SLOPE: POS,
DELAY: TIME,
2
3
4
5
T: (specified), STOP : AUTO, DELAY
: EVENT, E : 5
EXT ARM INPUT
START
DELAY START BY 4 CHAN 2 EVENTS
1
2
3
STOP
DESIRED T.I. MEASUREMENT
ACTUAL T.I. MEAS
4
5
START: EXT,
SLOPE: POS,
DELAY: EVENT, E: 5, STOP : EXT, SLOPE : NEG, DELAY : NONE
Figure 2-3. Agilent 53132A (With S/N Prefix 3646 and Above) External
Arming
NOTE
The examples in Figure 2-3 have the input signal applied to Channel 1 with
COMMON 1: ON, Channel 1 SLOPE: POS, and Channel 2 SLOPE: NEG. Thus, the
signals applied to Channel 1 and Channel 2 are identical, however, the channel events
occur on opposite slopes.
2-22
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Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
Table 2-3. *Agilent 53132A (S/N Prefix 3646 and Above) Gate & External Arm Key Menus as a
Function of the Measurement and Arming Mode
Freq, Period,
Ratio
Phase
Totalize
RiseTime, Fall Time,
+/−Width, Dutycycle
**
Auto Arming:
Auto Arming:
Auto Arming:
Auto Arming:
Auto Arming:
GATE:
ARM:
GATE:
ARM:
✴START: AUTO
AUTO
AUTO
AUTO
AUTO
Time Interval
DELAY✴: NONE
TIME
EVENT
<time>
<events>
Digits Arming:
GATE: DIGITS
DIGITS: <digits>
_______________
Time Arming:
GATE:
TIME:
TIME
<time>
_______________
_______________
_______________
_______________
_______________
Time Arming:
_______________
GATE:
TIME:
External Arming:
External Arming:
External Arming:
External Arming:
External Arming:
GATE:
ARM:
GATE:
ARM:
✴START: EXT
EXTERNL
START: POS
NEG
STOP:
TIME:
EXTERNL
SLOPE: POS
NEG
EXTERNL
START: POS
NEG
STOP:
AUTO
NEG
POS
TIME
<time>
TIME
<time>
TIME:
NEG
POS
TIME
<time>
EXTERNL
SLOPE: POS
NEG
✴SLOPE: POS
NEG
✴DELAY: NONE
TIME
EVENT
✴T:
<time>
✴E:
STOP✴:
<events>
AUTO
EXT
SLOPE✴: POS
NEG
DELAY✴: NONE
TIME
EVENT
T✴:
E✴:
<time>
<events>
* There is no Gate and External Arm menu available for Voltage Peaks measurements.
** A leading star (✴) means the parameter affects the START event. A trailing star means the parameter affects the STOP event.
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2-23
2
T✴:
E✴:
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
To Use the Gate and External Arm
Example Procedure for Gate and External Arm
For demonstration purposes, you want to set up the Counter so that it uses an external
arm to start a measurement. You want to make a Totalize measurement on the positive
edges (that is, count the number of positive edges) of a pulse-train signal applied to
channel 1. Also, you want to perform the measurement during an interval of
5 milliseconds as shown in the following figure.
2
CHANNEL 1
Ext
Arm
Ext
Arm
Gate
5 ms
Perform the following procedure to accomplish this task.
1
Turn on the Counter, and press Stop/Single to put the Counter into the single
measurement mode.
2
Connect the pulse-train signal to channel 1 input, and press Other Meas key until
TOTALIZE 1 is displayed.
3
Connect an external TTL signal to the Counter’s rear-panel Ext Arm connector.
4
Press Gate & ExtArm key.
GATE: TIME is displayed.
5
Press any one of the arrow keys until GATE: EXTERNL is displayed.
6
Press Gate & ExtArm key.
START: POS is displayed. (If START: NEG is displayed instead, then press any
one of the arrow keys to toggle to the next state—POS).
2-24
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Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
7
Press Gate & ExtArm key.
STOP: NEG is displayed.
8
Press any one of the arrow keys until STOP: TIME is displayed.
9
Set the Gate Time to 5 ms by performing the following steps:
a.
Press Gate & ExtArm key.
TIME:
b.
Press the appropriate arrow keys to until TIME:
c.
Press Enter key.
.00500 seconds is displayed.
BE SURE to press the Enter key to complete the numeric entry.
The counter will now gate for a duration of 5 ms.
10
Press Stop/Single key to start the measurement.
The measurement is started after the external arm pulse occurs.
Example Procedure for Changing the Number of Digits of Resolution
Displayed for More Precise Measurements
1
Turn POWER key OFF then ON again (cycle POWER key) to preset the Counter.
2
Connect (for demonstration purposes) the 10 MHz Out signal to the channel 1 input.
3
Press Time & Period key until PERIOD 1 is displayed.
After a few seconds, 0.10000000000 µs is displayed. Hence, the default number of
digits (or resolution) displays a precise measurement.
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2-25
2
NOTE
.100 seconds (the default time) is displayed.
Chapter 2 Operating Your Universal Counter
Using the Gate & External Arm Menu Key
4
To demonstrate how to use “digits arming” to change the number of digits displayed,
perform the following steps first.
a.
Press Gate & ExtArm key
GATE: TIME is displayed.
b.
Press any one of the arrow keys until AUTO is displayed.
c.
Press Run key.
0.1000 µs is displayed. Note that fewer digits are displayed.
2
In “auto arming” you produce results quickly. The short gate time produces a
lower-resolution result.
5
To change the display to the better measurement resolution using digits arming,
perform the following steps:
a.
Press Gate & ExtArm key
GATE: AUTO is displayed.
b.
Press any one of the arrow keys until DIGITS is displayed.
c.
Press Gate & ExtArm key.
DIGITS:
4 is displayed (the default number of digits)
d.
To set the number of digits displayed to 8, press the appropriate arrow keys until
DIGITS: 8 is displayed.
e.
Press Enter key.
f.
Press Run key.
0.10000000 µs is displayed. Note that 8 digits of resolution are displayed.
2-26
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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
Using the MATH Menu Keys
MATH
Note that Math and Limits are not available for Totalize and Voltage Peaks
measurements.
Scale &
Offset
Overview of Scale/Offset Math Menu
Stats
(Measurement × Scale) + Offset = Displayed Result
The math operations can be used, for example, to subtract systematic errors or display
the percentage difference between signals. Also, the overall math operation can be
disabled and then re-established without having to re-enter constants.
The menu items of the Scale and Offset Math functions allow you to:
•
enter a desired multiplication factor for a measurement (SCAL:).
•
enter a desired addition or subtraction value for a measurement (OFFS:).
•
get and display the last measurement value, and use it as the offset (SET
OFFSET ?).
•
disable or enable the Math mode (MATH: OFF or ON)—Note that the Math
mode is automatically enabled when you enter the scale and/or offset value(s);
thus, the primary function of this menu item is to allow you to turn the Math
mode off.
•
get Help, which displays the equation “(MEAS X SCALE) +
OFFS = RESULT” to tell you how the scale and offset results are computed by
the Counter (MATH HELP ?).
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2-27
2
The Scale and Offset functions within the Math menu allow you to perform simple
mathematical operations on the measurement result before it is displayed. The Scale
and Offset functions allow for multiplication and addition. Modification of the
displayed measurement by these math operations is represented by the following
equation:
Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
To Use the Scale/Offset Math Menu
Example Procedure for Scale Function
For demonstration purposes, you have a motor that has a tachometer attached to its
rotating shaft that generates a pulse for every revolution of the shaft.
Your task is to measure the speed or revolutions per minute (rpm) of the tachometer’s
sinusoidal output, and make the Counter directly display the measurement in rpm
(which is fundamentally a frequency measurement). The equation for this task is:
2
Resolution
Resolution
60Sec
Frequency  ----------------------------- × Scale  -------------- = Results  ----------------------------- 






Sec
Min
Min
Perform the following procedure to accomplish this task.
NOTE
1
Connect the sinusoidal output to channel 1 input, and set up the Counter to measure
frequency of the signal. (Refer to the section in this chapter titled “To Measure
Frequency” if needed.)
2
Press Scale & Offset key until SCAL: 1.000000 is displayed.
3
Set the Scale to 60 (since there are sixty seconds in a minute) by performing the
following steps:
a.
Press appropriate arrow keys to set Scale to 60.
b.
Press Enter key.
BE SURE to press the Enter key to complete the numeric entry.
The scale is now set to 60.
When the scale factor is set, both scale and offset are applied to the measurement
result. Verify that the offset value is zero for applications requiring only scale by
performing the following step.
2-28
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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
4
Press Scale & Offset key until OFFS: is displayed.
OFFS: 0.000000 should be displayed. If the Offset value is not set to “0.000000”:
NOTE
a.
Press the appropriate arrow keys to set the Offset to “0.000000.”
b.
Press Enter key.
BE SURE to press the Enter key to complete the numeric entry.
The offset is now set to 0.
2
5
Press Run key.
The rpm measurement is displayed.
Example Procedure for Offset Function
Your task is to measure the Period of a signal connected to channel 1, and to offset the
measurement by 100 nanoseconds. Perform the following procedure to accomplish
this task.
NOTE
1
Cycle POWER key to preset the Counter.
2
Connect a signal to channel 1, and set up the Counter to measure the period of the
signal, using the Time & Period key. (Refer to the section in this chapter titled “To
Measure Period” if needed.)
3
Press Scale & Offset key until SCAL: is displayed.
4
Set Scale to “1” by pressing the appropriate arrow keys to enter the value 1.000000 if
Scale is not already set to “1.”
5
Press Enter key.
BE SURE to press the Enter key to complete the numeric entry.
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2-29
Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
6
Press Scale & Offset key until OFFS: is displayed.
OFFS: 0.000000 seconds should be displayed. This is the default value.
7
Set the Offset to −.1000000 µs.
2
Refer to the sub-section titled “Entering the Offset Value” in Chapter 1, “Getting
Started,” for details on how to perform numeric entry for Offset.
a.
Use the appropriate combination of the arrow keys to display a value of
.1000000 µs.
b.
Press +/−key, which is located below the arrow keys, to change the plus sign to
minus.
OFFS: −.1000000 µs is displayed.
c.
NOTE
Press Enter key.
BE SURE to press the Enter key to complete numeric entry.
The counter will add −.1000000 µs to each measurement.
8
Press Run key.
The resultant period measurement is displayed with 100 nanoseconds subtracted from
each result.
Example Procedure for Turning Off Math Mode
1
Press Scale & Offset key until MATH: ON is displayed.
2
Press any one of the arrow keys.
MATH: OFF is displayed. Now, Scale and Offset no longer are used to modify the
displayed result.
3
Press Run key to return the Counter to its normal operation.
2-30
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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
Example Procedure for Setting the Offset From the Last Measurement
Value
The SET OFFSET ? menu item uses the negative of the last measurement value,
rounded to eleven digits, to set the OFFSET. Thus, any difference in the offset (or
now the reference value) and the current measurement value is displayed.
Let’s assume you are measuring the frequency of a stable source, but you are only
interested in the least significant digits of the measurement. Use the SET OFFSET
? menu item to configure the appropriate OFFSET value.
1
Cycle POWER key to preset the Counter.
2
Change gate time to 15.0 seconds on GATE menu.
3
To demonstrate SET OFFSET?, connect a 10 MHz sine wave signal to channel 1 of
the Counter, and set up the Counter to measure the frequency of the signal. (Refer to
the section in this chapter titled “To Measure Frequency” if needed.)
10.0000000001 MHz is displayed.
4
Press Scale & Offset key until SET OFFSET ? is displayed.
5
Press Enter key.
OFFS:−10.00000 MHz is displayed, for example.
Note that this value represents the last measurement of the input signal rounded to
eleven digits. The Counter uses it as the reference offset value, and reverses the sign
from + to −.
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2-31
2
Your task is to measure a stable source to obtain the changes in theleast significant
digits.
Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
6
Press Run key.
−12* µ is displayed, for example, at the completion of the next measurement.
This value (−0.00012) is the small difference between the signal being measured and
the reference value (OFFS: −10.00000 MHz) obtained in step 5.
Using the reference allows you to observe small differences in the
13th–15th digits which would not be observable in the 12-digit display.
2
Overview of Statistics (Stats) Menu
The Stats menu allows you to:
•
select which computed statistics you want displayed
(SHOW: STD DEV, MEAN, MAX, or MIN).
•
choose between having the actual measurement or statistical result displayed
(SHOW: MEAS).
•
select the number of measurements you want to make for each computed statistic
(N:).
•
enable or disable the Stats mode (STATS: ON or OFF).
•
enable the Counter to perform statistical computation on only measurements that
are within the user-entered limits; that is, filter data (USE: IN LIMIT), or
•
enable the Counter to perform statistical computation on all measurements,
whether they fall in or out of the user-entered limits (USE: ALL MEAS).
•
configure Stop/Single key to initiate a set of N measurements (ON SINGLE: 1
or N).
2-32
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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
To Use the Stats Menu for Automatic and Continuous Statistical
Analysis
Example Procedure for Computing Stats
For demonstration purposes, let’s say you need to know the mean (average) and
minimum risetime values of a digital signal.
Also, you want the Counter to make 20 measurements before it performs these
statistical computations.
Perform the following procedure to accomplish this task.
2
1
Connect the digital signal to channel 1 input, and set up the Counter to measure
risetime of the signal, using the Time & Period key. (Refer to the section in this
chapter titled “To Measure Rise/Fall Times” if needed.)
2
Press Stats key until N: is displayed.
N:
3
Set N to 20 (since you want the Counter to make 20 measurements before computing
the mean and minimum values) by pressing the appropriate arrow keys.
N:
4
NOTE
100 is displayed (100 is the default value).
20 is displayed.
Press Enter key.
BE SURE to press the Enter key to complete numeric entry.
The Counter is now set to make 20 measurements before computing statistics.
5
Press Stats key until SHOW: is displayed.
6
Press any one of the arrow keys until SHOW: MEAN is displayed.
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2-33
Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
7
Press Run key.
Immediately after the Run key is pressed, the Counter momentarily displays DOING
STATS. When the Counter has made 20 valid measurements, it then displays the
mean risetime value of the digital input signal.
NOTE
The Counter will display updated statistics results every 20 measurements.
Press Stop/Single key after you have a mean value displayed.
9
To display the minimum risetime value, perform the following:
2
8
CAUTION
a.
Press Stats key.
b.
Press any one of the arrow keys until SHOW: MIN is displayed.
c.
Press Enter key.
Pressing the Run key now would clear the present statistics results and calculate a
new set of results after “N” measurements.
Example Procedure for Easy Viewing of Stats
The d and f arrow keys provide a short cut to viewing each of the stats (that is,
standard deviation, mean, maximum, and minimum) when the Counter is already
displaying a statistic measurement. These keys allow you to cycle through the
different Stats results and automatically view them.
While the Counter is displaying a statistics measurement, press either the d or f
arrow key to cycle through and display each of the four computed statistics, and
the current measurement.
2-34
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Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
Example Procedure for Filtering Data (Using Limits) During Stats
1
Using the procedure in the previous sub-section titled “Example Procedure for Easy
Viewing of Stats,” set up the Counter to display the minimum risetime value of an
input signal.
2
Set the upper and lower limits. (Refer to the section in Chapter 1 titled “To Set Limits
of Measurements” if needed.)
3
Press Stats key until USE: is displayed.
4
Press one of the arrow keys to toggle to IN LIMIT state.
2
USE: IN LIMIT is displayed.
5
Press Run key.
The Counter will now perform the statistical computations (that is, standard
deviation, mean, maximum, and minimum) on only those measurements that are
within the user-entered limits. The Counter then displays the statistics you picked
(minimum, in this case).
6
Press Stats key until USE: is displayed.
7
Press any one of the arrow keys to toggle to ALL MEAS state.
USE: ALL MEAS is displayed.
8
Press Run key.
The Counter will now perform the statistical computations (that is, standard
deviation, mean, maximum, and minimum) on all measurements, whether they fall in
or out of the user-entered limits. The Counter then displays the statistic you picked
(minimum, in this case).
Example Procedure for Configuring SINGLE to Initiate
N Measurements
Please refer to the procedure titled “To Use the Measurement Control Keys” on
page 2-6 for an example use of ON SINGLE.
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2-35
Chapter 2 Operating Your Universal Counter
Using the MATH Menu Keys
Example Procedure for Turning Off Stats Mode
1
Press Stats key until STATS: ON is displayed.
2
Press any one of the arrow keys.
STATS: OFF is displayed.
Press Run key to return the Counter to its normal operation.
2
3
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Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
Using the LIMITS Menu Keys
Note that Math and Limis menus are not available for Totalize and Voltage Peaks
measurements.
LIMITS
Uppr &
Lower
The menu items under the Limits keys allow you to:
•
select the desired upper and lower measurement limits (UPPR:, LOWR:).
•
disable or enable Limit Testing (LIM TEST: OFF or ON)—Note that the Limit
Testing is automatically enabled when you set the upper and lower limits, or
update any menu item in the Limit Modes menu; thus, the primary function of the
LIM TEST menu item is to allow you to turn Limit Testing off.
•
set the Counter to stop making measurements when a measurement exceeds the
user-entered limits (ON FAIL: STOP). (Stop on limits does not have any effect
if the Counter is in the single measurement mode.)
•
enable the Counter to continue taking measurements after a measurement
exceeds the user-entered limits (ON FAIL: GO ON).
•
change the Counter display from numeric to analog graph to quickly visualize
changes in the signal (or to quickly see when measurements are in or out of
limits) (SHOW: NUMBER or GRAPH).
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2-37
2
Limit
Modes
Overview of Limits Menus
Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
To Set and Use Automatic Limit Testing
Limits Testing Example 1—Flag and Stop Measuring On Limits
For demonstration purposes, you want to first measure the ratio between signals
applied to channels 1 and 2 of the Counter. Next, you want to set limits that would
cause the Counter to flag (turn on the Limits annunciator in the front-panel display)
and stop making measurements if these signals drift more than ±10% apart.
2
1
Connect input signals to channels 1 and 2 of the Counter, and set up the Counter to
measure the ratio between these signals. (Refer to the section in this chapter titled “To
Measure Frequency Ratio” if needed.)
Assume that the ratio measured between the two signals is 2. If the drift is not to
be larger than ±10%, then the upper limit should be set to 2.2 and the lower limit
to 1.8. Let’s set these values in the following steps.
2
Press Uppr/Lower key until UPPR: is displayed.
UPPR: 0.000000 is displayed (0 is the default value).
3
NOTE
Set UPPR to 2.2. (Refer to the section in Chapter 1 titled “To Set Limits of
Measurements” if needed.)
After you enter the value 2.2, BE SURE to press the Enter key to complete the
entry.
4
Press Uppr/Lower key until LOWR: is displayed.
LOWR: 0.000000 is displayed (0 is the default value).
5
NOTE
Set LOWR to 1.8.
After you enter the value 1.8, BE SURE to press the Enter key to complete the
entry.
2-38
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Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
6
Press Limit Modes key until LIM TEST: ON is displayed.
Note that once either the upper or lower limits have been set, the limit testing is
automatically enabled as indicated by the LIM TEST: ON display, and the Limit
Modes indicator.
7
Press Limit Modes key.
ON FAIL: GO ON is displayed.
8
Press any one of the arrow keys to toggle to the next state.
9
Press Run key to start making measurements with this limits-testing choice selected.
Now, if a measurement drifts out of the user-entered limits the Limit annunciator in
the display will light. The Counter will stop making measurements.
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2-39
2
ON FAIL: STOP is displayed. The ON FAIL: STOP function tells the Counter to
stop making measurements when the input signals drift more than ±10% apart.
Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
Limits Testing Example 2—Flag On Limits but Continue Measuring
If you decide that you want the Counter to flag measurements that are out of limits but
to continue taking measurements, then perform the following steps.
1
Press Limit Modes key until ON FAIL: STOP is displayed.
2
Press any one of the arrow keys to toggle to the next state.
ON FAIL: GO ON is displayed.
Press Run key to start making measurements with this limits-testing choice selected.
2
3
Now, each time a measurement drifts out of the user-entered limits the Limit
annunciator in the display will light, but the Counter will continue to make
measurements.
The Limit annunciator will go on whenever a result is out of limits. As soon as a
result is within limits, the Limit annunciator will go off.
Limits Testing Example 3—Use Analog Graph Display While Adjusting
Input Signal
1
For demonstration purposes, connect a 10 MHz signal to channel 1 and set up the
Counter to measure the frequency of the signal, using the Freq & Ratio key. (Refer
to section in this chapter titled “To Measure Frequency” if needed.)
2
Using the Uppr & Lower key, set the upper limit to 10.2 MHz and the lower limit to
9.8 MHz. (Refer to the section in Chapter 1 titled “To Set Limits of Measurements” if
needed.)
3
Press Limit Modes key until SHOW: NUMBER is displayed.
4
Press any one of the arrow keys to toggle to the next state.
SHOW: GRAPH is displayed.
2-40
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Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
5
Press Run key to display the graph as shown below.
Freq
Ch 1
The asterisk (*) or star represents the measurement and the colons (:) represent the
limits you set. This graph indicates that the measurement is within the limits. The
colon to the left represents the lower limit, and the colon to the right represents the
upper limit.
2
6
Adjust your signal down to 9.7 MHz.
Freq
Ch 1
Limit
The star is now out of the limits as it is below the entered 9.8 MHz lower limit. (Note
the Limit annunciator lights since the signal is out of limits.)
7
Now, adjust your signal up to 10.3 MHz.
Freq
Ch 1
Limit
The star is now out of the limits as it has exceeded the entered 10.2 MHz upper limit.
(Note the Limit annunciator lights since the signal is out of limits.)
8
To change the Counter back to displaying numbers, press Limit Modes key until
SHOW: GRAPH is displayed.
9
Press any one of the arrow keys to toggle to SHOW: NUMBER.
10
Press Run key to display measurements as numbers.
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2-41
Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
Limits Testing Example 4—Selecting Filtering Conditions of Stats
Computation
Let’s assume you have set the upper and lower limits to reasonable values as in the
previous procedure.
2
NOTE
Since the Limit Testing and Stats functions are independent, LIM TEST: doesn’t have
to be ON in order to filter measurements for statistics.
1
Press Stats key until USE: ALL MEAS is displayed.
2
Press any one of the arrow keys to display USE: IN LIMIT.
3
Press Run key to start the measurement.
The Counter will compute statistics using only measurements that are within the userentered limits.
4
Press Stats key until USE: IN LIMIT is displayed.
5
Press any one of the arrow keys to display USE: ALL MEAS.
The Counter will compute statistics using all measurements, whether they fall in or
out of the user-entered limits.
6
Press Run key to start the measurement.
7
To turn off the Limit Testing, perform the following steps:
a.
Press Limit Modes key until LIM TEST: ON is displayed.
b.
Press any one of the arrow keys to toggle Limits OFF.
LIM TEST: OFF is displayed.
When Limit Testing is off, the Limit annunciator, the stop-on limit capability, the
limit graph, and the rear panel RS-232 Limit Output (if DTR: LIMIT choice was
selected as described in the following Example 5 procedure) are disabled.
NOTE
Stats will still filter data using your upper and lower limits if you set Stats to USE: IN
LIMIT.
8
Press Run key to return the Counter to computing statistics on all measurements.
2-42
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Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
Limits Testing Example 5—Sending the Limit-Detect Output to the RS-232
Serial Port
NOTE
If you cycle power, you will lose everything except saved measurement setups and
special parameters saved to non-volatile memory; therefore, make sure you use the
Save and Recall functions of the Counter to retain the measurement setup prior to
powering down to set up the the Limit-Detect Output line (pin 4) of the RS-232 serial
connector. Refer to the appropriate section in this chapter for details on how to use
Save and Recall.
1
To use the Limit-detect output from the serial port, perform the following steps:
2
a.
Save your measurement setup that includes your Limit Testing choices, by
simply pressing the Save & Print key until SAVE: 1 is displayed, then Enter
key to save to register 1.
b.
Turn off the Counter.
c.
Press and hold Recall (Utility) key, then press POWER key.
d.
Press Recall (Utility) key until DTR: is displayed.
e.
Press any one of the arrow keys until DTR: LIMIT is displayed.
2
Press Run key.
3
Press Recall (Utility) key until RECALL 1 is displayed, then wait a few seconds to
recall the measurement setup saved in register 1.
Since your measurement setup included your settings for upper and lower limits, and
LIM TEST: was set to ON, the Counter is now set for limit testing with the Limitdetect output.
If a measurement drifts out of the user-entered limits, the Limit annunciator in the
display will light. Also, pin 4 on the RS-232 connector will change state (to a lowvoltage RS-232 level) to flag each time a measurement drifts out of the limits. (RS232 voltage levels swing from ±12V.)
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2-43
Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
Using CHANNEL 1 and CHANNEL 2 Input
Conditioning Keys
The Trigger/Sensitivity keys are menu keys, while the other keys in this group (that
is, 50Ω/1 MΩ, DC/AC, X10 Attenuate, and 100 kHz Filter) are toggle keys.
CHANNEL 1
Trigger
Sensitivity
50 Ω
1MΩ
DC
AC
!
2
Damage Lvl:
5V rms MAX. 50Ω
X10
100kHz
Filter
Attenuate
Use the CHANNEL 1 and CHANNEL 2 group of keys (which are identical) to set up
the Counter’s input conditions for measuring input signals applied to channels 1 and
2. Each channel can be set up independently. (The Trigger/Sensitivity menu is
unavailable for Voltage Peaks measurements.)
Overview of Trigger/Sensitivity Menu
NOTE
Many of the measurement functions (that is, frequency, period, etc.) automatically set
the auto trigger mode and trigger level. The Trigger/Sensitivity menu items allow you
to override the automatic settings.
The menu items under the Trigger/Sensitivity keys allow you to manually:
•
select the auto trigger mode (AUTO TRIG: ON or OFF).
If auto trigger is OFF, you are allowed to:
•
select the voltage level at which the corresponding input channel will trigger
(LEVEL: n V, where n is a numeric value).
If auto trigger is ON, you are allowed to:
•
select the percentage of an input signal at which the Counter will trigger
(LEVEL: n PCT, where n is a numeric value).
Setting AUTO TRIG: to ON causes the Counter to measure and compute a trigger
level corresponding to the auto-trigger percentage of the selected channel.
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Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
While AUTO TRIG: is ON, the Counter will, for each measurement, check that the
measurement signal(s) are triggering at the current level(s). If no triggering is found,
the Counter will measure and compute new trigger level(s). (While AUTO TRIG: is
ON, the Counter also measures and computes new trigger level(s) whenever
measuring is invoked with the front-panel Stop/Single and Run keys, or whenever the
auto-trigger percentage is updated.)
The menu items under the Trigger/Sensitivity keys also allow you to manually:
select what slope or edge (positive or negative) of an input signal will trigger the
Counter (SLOPE: POS or NEG).
•
select medium, high, or low sensitivity levels (thus, varying the hysteresis
window or trigger band) for the optimum sensitivity for certain measurement
applications (SENSTVTY: MED, HI, or LOW). Sensitivity is defined in the
paragraph titled “Definition of Sensitivity” starting on page 2-45.
•
select a common input signal to make a Time Interval (TI) measurement
(COMMON 1: ON or OFF). In COMMON 1: ON, an input signal applied to
CHANNEL 1 is split to allow the Counter to use it for both CHANNEL 1 and
CHANNEL 2 input amplifiers when the Counter is operating in its Time Interval
(TI 1 TO 2) measurement function. By independently adjusting CHANNEL 1
and CHANNEL 2 keys, the Counter performs a TI measurement on a single input
signal as shown in the following figure.
CHANNEL 1
CHANNEL 2
COMMON 1: ON, CHAN 1 SLOPE: POS, CHAN 2 SLOPE: NEG
DEFINITION OF SENSITIVITY. Sensitivity is the lowest amplitude signal at a
particular frequency that the Counter will count. The amplifier gain and the voltage
difference between the input trigger hysteresis levels determine the Counter’s
sensitivity. Sensitivity is specified with the trigger level set at a value equal to the
midpoint of the input signal. The input waveform must cross both the upper and lower
hysteresis levels to generate a count as shown in the following figure.
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2-45
2
•
Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
Upper
Hysteresis
Level
Trigger
Level
Peak-to-Peak
Sensitivity
2
Lower
Hysteresis
Level
Input signal
to Counter
Signal crosses through both hysteresis levels to effect a count.
If the signal peaks do not exceed beyond both hysteresis limits, the input signal will
not generate a count. For example, the peak-to-peak amplitude is insufficient, or
trigger level is set above or below the midpoint of the input signal as shown in the
following figures.
Signal will not generate a count because the peak-to-peak amplitude of
the signal is insufficient.
2-46
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Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
Upper
Hysteresis
Level
Peak-to-Peak
Sensitivity
Lower
Hysteresis
Level
Trigger
Level
Input signal
to Counter
The sensitivity specification is given in terms of volts rms for applications that
involve measuring a sine wave signal, though it should be noted that a different
waveform with the same rms voltage may not trigger a count.
Since the Counter input does not respond to the rms value of the waveform but only to
the peak-to-peak value, the sensitivity specification is also given for volts peak-topeak with a minimum pulse width.
As previously mentioned, the sensitivity of the Counter can be changed by using the
SENSTVTY: MED, HI, or LOW menu choices in the Trigger/Sensitivity key
menu for optimum sensitivity for certain measurement applications. For example, low
sensitivity setting is very useful when measuring noisy signals.
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2-47
2
Signal will not generate a count because the trigger level is set below
the midpoint of the signal, causing the lower hysteresis level to not be
crossed.
Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
To Use the Trigger/Sensitivity Keys to Adjust Counter’s Triggering
Level
Example Procedure for Setting Trigger Voltage and Sensitivity Levels
1
Connect a signal to channel 1 input, and set up the Counter to measure the frequency
of the signal. (Refer to section in this chapter titled “To Measure Frequency” if
needed.)
2
Press CHANNEL 1 Trigger/Sensitivity key.
2
AUTO TRG: ON is displayed.
3
Press any one of the arrow keys to toggle to the auto trigger off mode.
AUTO TRG: OFF is displayed.
4
Press Trigger/Sensitivity key.
LEVEL:
5
NOTE
0.000V is displayed. (Actual value may be different.)
Suppose you want to set the trigger level to 1V (actual value may be different).
Perform the following steps:
a.
Press the appropriate arrow keys until LEVEL:
b.
Press Enter key.
1.000V is displayed.
BE SURE to press the Enter key to complete the numeric entry.
The trigger voltage level for channel 1 is now set to 1V as shown in the following
figure.
1V
0V
2-48
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Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
6
Press Trigger/Sensitivity key.
SLOPE: POS is displayed. The trigger slope is set at positive; thus, the Counter
triggers on the rising edge of the input signal as shown in the following figure.
*
*
*
*
1V
0V
7
2
If you want to trigger on the negative (or falling) edge of the input signal, then
perform the following step.
Press any one of the arrow keys until SLOPE: NEG is displayed.
The trigger is set at negative; thus, the Counter triggers on the falling edge of the
input signal as shown in the following figure.
8
Press Trigger/Sensitivity key to set the input channel sensitivity level.
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2-49
Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
9
Press any one of the arrow keys until SENSTVTY: HI is displayed.
The Counter’s CHANNEL 1 sensitivity is set high as shown in the following figure.
1
2
3
4
Trigger
Band
2
0V
The Counter should now be triggering as determined by the sensitivity level, and
displaying the input signal’s frequency if the input signal peak-to-peak voltage is
large enough for the selected sensitivity level.
The signal must travel completely through the trigger band before a valid trigger is
recognized.
10
Press any one of the arrow keys until SENSTVTY: LO is displayed.
The Counter’s CHANNEL 1 sensitivity is set low as shown in the following figure.
2-50
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Chapter 2 Operating Your Universal Counter
Using CHANNEL 1 and CHANNEL 2 Input Conditioning Keys
Example Procedure for Using Common 1 to Make Time Interval (TI)
Measurements on a Single Signal
1
Connect a signal to channel 1 of the Counter.
2
Press Time & Period key until TI 1 TO 2 is momentarily displayed. (Note that the
Time, Ch1, and Ch2 annunciators light.)
3
Press Trigger/Sensitivity key until COMMON 1: OFF is displayed.
4
Press any one of the arrow keys until COMMON 1: ON is displayed.
Overview of Input Conditioning Toggle Keys
NOTE
Identical functions are available on CHANNEL 1 and CHANNEL 2. The following
text describes only CHANNEL 1 functions (as indicated by the “1” in the display) for
simplicity.
The toggle keys of the input channels allow you to:
•
select 50Ω input impedance or 1 MΩ input impedance for the input channel (CH
1: 50 OHM, or 1M OHM).
•
select dc coupling or ac coupling for the input channel (CH 1: DC, or AC).
•
select the attenuation of signals at the input channel. The normal or “no”
attenuation state (key indicator OFF) connects the input signal directly to the
input amplifier. The X10 state attenuates the input signal by a factor of 10.
•
insert a low pass filter into the input channel, which attenuates frequencies above
100 kHz. When the 100 kHz filter is enabled, the key indicator is ON. When the
filter is disabled (key indicator OFF), the Counter resumes normal operation over
the entire bandwidth
(CH 1: LP FILT, or NO FILT).
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2-51
2
When the Counter is operating in Common 1 mode, the signal applied to CHANNEL
1 is used for both start and stop event. The trigger level, slope, and sensitivity for the
start signal can be modified by using the CHANNEL 1 input conditioning keys.
Whereas, the trigger level, slope, and sensitivity of the stop signal can be modified by
using CHANNEL 2 input conditioning keys. (See the figure located at the end of the
sub-section of this section titled “Overview of Trigger/Sensitivity Menu.”)
Chapter 2 Operating Your Universal Counter
Using the Save and Recall Menus
Using the Save and Recall Menus
Utility
2
Recall
Local
Save &
Print
Overview of Save and Recall Functions
The combined use of the Save and Recall functions allows you to save and recall the
measurement setups which determine how the Counter measures, analyzes, and
reports answers. A setup can include the measurement to be made, the precision
desired, offset and scaling factor to apply, limits to be met, and statistics to compute.
Setups can also control printing of hardcopy. Setups saved to memory registers are
preserved when the Counter is powered down or disconnected from a power source.1
The Save and Recall functions enable faster and easier operation, fewer operator
errors, and minimum training.
The Save and Recall keys allow you to:
•
create and save up to 20 different instrument measurement setups into internal
non-volatile memory (SAVE:).
•
recall up to 20 user-selected measurement setups that were previously saved
(RECALL 1, 2, 3, ... 20). With a total of 21 save/recall registers, there are 20
registers available to you for save/recall operations. The Counter automatically
saves the current setup to register 0 (RECALL 0) before executing a recall
function.1
•
delete any of the saved setups (UNSAVE:).
1
For firmware revisions 3622 and above, RECALL 0 is stored in volatile memory. RECALL 0 is not preserved
if you cycle power.
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Chapter 2 Operating Your Universal Counter
Using the Save and Recall Menus
To Use the Save Function
The following step-by-step procedure describes how to SAVE a simple measurement
setup to quickly get you familiar with the Save function.
You will SAVE the following in register 1 (SAVE: 1):
the Period measurement function,
•
the input conditioning parameters:
–
auto trigger to off
–
trigger level to 1.5V
–
input impedance to 50Ω
–
input coupling to DC
2
1
•
Cycle POWER key to preset the Counter setup.
The Counter is now ready to measure the frequency of a signal applied to
CHANNEL 1 input as indicated by the Freq and Ch1 annunciators.
2
Press Other Meas key until PERIOD 1 is displayed.
The Counter is now ready to measure the period of a signal applied to CHANNEL 1
input as indicated by the Period and Ch1 annunciators.
3
Press Trigger/Sensitivity key.
AUTO TRG: ON is displayed.
4
Press any one of the arrow keys.
AUTO TRG: OFF is displayed.
5
Press Trigger/Sensitivity key, or Enter key.
LEVEL: 0.000V is displayed.
6
Using the appropriate arrow keys, set the trigger level to 1.5V.
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2-53
Chapter 2 Operating Your Universal Counter
Using the Save and Recall Menus
7
Press Enter key to complete the 1.5V entry.
8
Press 50Ω/1MΩ key to set input impedance to 50Ω.
9
Press DC/AC key to set input coupling to DC.
10
To save these settings, which make up your measurement setup, simply perform the
following steps:
a.
Press Save & Print key.
NO is displayed.
2
SAVE:
b.
Press the appropriate arrow key until SAVE:
c.
Press Enter key.
1 is displayed.
The measurement setup is now saved in register 1. To recall this measurement
setup, perform the recall procedure in the following section.
To Use the Recall Function
This procedure describes how to RECALL the measurement setup you’ve saved in
the previous procedure.
NOTE
You cannot save a setup to register 0 (RECALL 0). The Counter automatically
saves the current setup to register 0 before executing a recall function. You can,
however, recall the setup in the register 0 if you need to, which is the purpose of this
“backup” storage register.
1
Cycle POWER key to preset the Counter.
Note the Counter is set to measure the frequency of a signal applied to channel 1 as
indicated by the Freq and Ch1 annunciators.
2
Press Recall key until RECALL 1 is displayed, and press Enter key or let the
Counter time out.
Note that the measurement setup has been recalled as indicated by the Period and
Ch1 annunciators, and 50Ω and DC LEDs.
2-54
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Chapter 2 Operating Your Universal Counter
Using the Save and Recall Menus
To Unsave a Measurement Setup
1
To unsave the measurement setup you’ve saved in the previous procedure, press Save
& Print key until UNSAVE: NO is displayed.
2
Press the appropriate arrow keys to select UNSAVE: 1, then press Enter key.
The measurement setup that was saved in register 1 (RECALL: 1) is deleted or
unsaved.
ADDITIONAL INFORMATION ABOUT UNSAVE
2
If the UNSAVE: display DOES NOT show up after the SAVE: display, then no
setups have been saved; all registers are empty.
If UNSAVE: display is present in the Save & Print key menu, then at least one setup
has been saved. (To determine how many setups are saved, continuously press the d
key while UNSAVE: n is displayed and count the number of registers that are
present.) Perform step 2, below, to delete a measurement setup.
1
Suppose there are two registers (1 and 2) that have setups saved in them. To remove
these setups, perform the following:
a.
At the UNSAVE:
1 display, press Enter key.
UNSAVE: 2 is displayed, indicating that register 1 has been cleared. To check
if the clearing was done, press the d key; the “1” display should not exist.
b.
At the UNSAVE:
2 display, press Enter key.
All registers are cleared when the UNSAVE menu item is NOT present in the
Save & Print key menu.
2
Now, suppose in the previous step (2) you wanted to leave register 1 alone, but you
want to delete register 2. Perform the following steps:
a.
At the UNSAVE:
UNSAVE:
b.
1 display, press d key.
2 is displayed.
Press Enter key to delete register 2.
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2-55
Chapter 2 Operating Your Universal Counter
Using the Print Menu
Using the Print Menu
Overview of the Print Menu
Local
Save &
Print
The Print menu allows you to:
•
enable or disable printing (PRINT: OFF or ON).
•
get help on how to print (PRINT HELP ?).
2
To Use the Print Menu
1
Press Save & Print key until PRINT: is displayed.
2
If PRINT: OFF is displayed, press any one of the arrow keys to toggle the next state.
PRINT: ON is displayed.
When PRINT is enabled, the Counter displays and prints the results for each
measurement. In addition, if STATS: ON, all statistics (that is, standard deviation,
mean, maximum, and minimum) will be printed.
NOTE
Printing may slow the update rate of the Counter because the Counter may have to
wait for the printer.
3
Press Save & Print key.
PRINT HELP ? is displayed.
4
Press Enter key.
The instruction “CONFIGURE PORT ON UTILITY MENU; REMEMBER TO
SAVE SETUP FIRST” is displayed.
5
Save your current setup as shown in the section titled “To Use the Save Function.”
6
Refer to the section in this chapter titled “To Configure the RS-232 Serial Port for
Printing” for information on how to configure and connect the Counter to a printer.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
Using the Utility Menu
Overview of the Utility Menu
POWER
The Utility menu is accessed by holding the Recall key and cycling POWER key.
Utility Menu:
Hold at power up
Utility
Recall
The Utility menu allows you to:
view the firmware revision of your Counter (REV: n).
•
select and/or display the current GPIB address (HP-IB: 1, ... 30, or TALK).
•
choose timebase source (TIMEBAS: AUTO, INT, or EXT).
•
execute several self tests (refer to the paragraph in this section titled “To Run the
Self-Test Routines” for details).
•
configure the following parameters for the RS-232 port:
2
•
–
set the print baud rate (BAUD: 9600, 19200, 300, 1200, or 2400).
–
set print parity (PARITY: OFF, EVEN, or ODD).
–
set the software pace (SW PACE: XON or NONE).
–
set the hardware pace to send data to a serial printer, or to send the Limitdetect output to a computer or controller, via the RS-232 port (DTR:
HIGH, HW PACE, or LIMIT).
–
change the numerical convention of the Counter’s displayed measurement
values. The numeric convention used in the USA separates the integral and
fractional portions of a number with a period (a decimal point), and separates
groups of three digits in the integer portion with a comma. You can reverse
this setting to conform to the numerical convention used in many other
countries (SHOW 9 AS: 9.0 or 9,0).
Early revisions of the Counter allowed calibration from the Utility menu with CAL:
menu item. Calibration and the CAL: menu item now reside on the Calibration menu;
the CAL HELP? menu item resides on the Utility menu as a pointer to the Calibration
menu.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
To Set the GPIB Address
Each device on the GPIB must have a unique address. You can set the Counter’s
address to any value between 0 and 30. The address is set to “3” when the Counter is
shipped from the factory.
Selecting Operating Mode (Talk/Listen, Talk-Only)
The Counter has two GPIB operating modes:
2
•
Addressed (talk/listen)—This mode is for bi-directional communication. The
Counter can receive commands and setups from the computer, and can send data
and measurement results.
To select the talk/listen operating mode, set the Counter’s GPIB address
from 0 to 30. Refer to the following sub-section titled “Setting the GPIB
Address” for instructions on how to select an GPIB address from the front panel.
•
Talk-only—In this mode, the Counter can send data to a printer. It cannot receive
commands or setups from the computer.
To select the talk-only operating mode, set the Counter’s GPIB mode to
“TALK”. Refer to the section titled “To Select the GPIB Talk-Only Mode for
Printing” for instructions on how to select talk-only operating mode.
Setting the GPIB Address
1
Press and hold Recall (Utility) key, then cycle POWER key.
REV: n is displayed; where “n” represents the numeric firmware revision code.
2
Press Recall (Utility) key until HP-IB: is displayed.
HP-IB:
3
NOTE
3 is displayed, for example.
To set the address to 15 (for example), use the appropriate arrow keys to enter the
value 15, then press Enter key.
BE SURE to press the Enter key to complete the numeric entry.
The address is now stored in non-volatile memory, and does not change when power
has been off or after a remote interface reset.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
To Choose the Timebase Source
1
Press and hold Recall (Utility) key, then cycle POWER key.
2
Press Recall (Utility) key until TIMEBAS: is displayed.
3
Press any one of the arrow keys until desired choice (that is, AUTO, INT, or EXT) is
displayed.
To Run the Self-Test Routines
Overview of the Self-Test Routines
2
The Utility menu includes the following three self-test menu items:
•
TEST LOOP:
•
TST PRINT:
•
TEST:
The Counter includes several self-tests. Some self tests are performed at the powerup
of the Counter. Some of these self tests can also be invoked from the Utility menu.
Other tests can also be invoked from the Utility menu, but a slightly different test is
performed. For example, a powerup self test might work regardless of connections to
the inputs while a Utility menu self test may require a specific signal to be connected.
Some self tests can only be invoked from the Utility menu, for example, the keypad
test.
You can specify that the tests should loop forever (TEST LOOP: ON or OFF) or
until any key is pressed.
You can also specify that failure messages be sent to a printer, the RS-232, and the
GPIB—if in talk-only (TST PRINT: ON or OFF).
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
There are 13 choices for the TEST: menu item. They are listed and described in the
following text.
TEST:
ALL? — run all tests, except display, keypad and printer tests.
DISP? — illuminate the indicators and vacuum-fluorescent display
(VFD) segments. Note, this test is not available if TEST
LOOP: is ON. TEST LOOP: must be OFF.
CPU? — test processor(s).
2
ROM? — checksum the ROM.
RAM? — test RAM.
EEPROM? — checksum the EEPROM, which is used for non-volatile
memory.
HP-IB? — test GPIB chip.
QSPI? — test serial hardware control loops.
FPGA? — internally measure the timebase to test count circuitry.
FR END? — check front end circuits, either by swinging trigger levels
(during power on test and ALL test) or asking you to connect
the timebase output to channels 1 and 2 using a BNC-T
connector to split the signal.
MEAS? — make a measurement, either by swinging trigger levels (during
power on test and ALL test) or asking you to connect the
timebase output to channel 1.
INTERP? — test interpolators.
KEYPAD? — request user to press all keys. Note, this test is not available if
TEST LOOP: is ON. TEST LOOP: must be OFF.
PRINT? — send three test lines to a printer via the RS-232. If in talk-only,
also send three test lines to a printer via the GPIB.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
Example Procedure for Running the Self Test
Press and hold Recall (Utility) key, then cycle POWER key.
2
Press Recall (Utility) key until TEST: is displayed.
3
Press any one of the arrow keys to select the desired menu choice in the menu item
(for example, the ALL? menu choice).
4
Press Enter key to start the test.
5
If you are asked to do something, press Enter key when you have completed the
requested task.
A pass or fail message will be displayed.
To Configure the RS-232 Serial Port for Printing
Software pacing, baud rate, parity, data bits, and stop bits parameters for each port are
user-selectable and independent of configuration of the other.
The table below lists the configuration factory-default values for the RS-232 port.
1
Parameter
Default
Possible Choices
Software Pacing
XON
XON or NONE
Baud Rate
9600
300, 1200, 2400, 9600, or 19200
Parity
NONE
EVEN or ODD 1
NONE
Data Bits
8
FIXED at 7
FIXED at 8
Stop Bits
1
FIXED
Full Duplex
ON
ON or OFF
DTR
HIGH
PACE, HIGH, LIMIT
When parity is EVEN or ODD, data bits are fixed at 7. When parity is NONE, data bits are fixed at 8.
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2
1
Chapter 2 Operating Your Universal Counter
Using the Utility Menu
Configuring the RS-232 serial port for printing requires that you:
•
set the hardware pacing in the DTR (Data Terminal Ready) menu item,
•
turn PRINT:ON in the SAVE&PRINT menu,
•
set the baud rate in the BAUD menu item,
•
set the parity type in the PARITY menu item, and
•
set the software pacing in the SW PACE menu item.
2
Setting the Hardware Pacing
1
Press and hold Recall (Utility) key, then cycle POWER key.
2
Press Recall (Utility) key until DTR: is displayed.
3
Press any one of the arrow keys until the desired hardware pacing is displayed.
NOTE
•
Choose HW PACE to use the DTR line for pacing.(CAUTION: You should
only choose this option if your printer and cable support DTR
handshaking.)
•
Choose HIGH to disable hardware pacing.
The Counter’s talk-only RS-232 port is now set to be the driver for a RS-232 serial
printer. The hardware pacing choice is stored in non-volatile memory, and does not
change when power has been off or after a remote interface reset.
Setting the Baud Rate
You can select one of five baud rates for RS-232 operation. The rate is set to 9600
baud when the Counter is shipped from the factory.
1
Press Recall (Utility) key until BAUD: is displayed.
2
Press any one of the arrow keys until the desired baud rate is displayed.
The baud rate is stored in non-volatile memory, and does not change when power has
been off or after a remote interface reset.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
Setting the Parity
You can select the parity for RS-232 operation. The Counter is configured for parity
off when shipped from the factory.
1
Press Recall (Utility) key until PARITY: is displayed.
2
Press any one of the arrow keys until the desired parity is displayed.
The parity choice is stored in non-volatile memory, and does not change when power
has been off or after a remote interface reset.
2
Setting the Software Pace
You can select the software pace for RS-232 operation.
1
Press Recall (Utility) key until SW PACE: is displayed.
2
Press any one of the arrow keys until the desired software pacing is displayed.
The software pacing choice is stored in non-volatile memory, and does not change
when power has been off or after a remote interface reset.
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
To Configure the RS-232 Serial Port for Sending Limit-Detect
Output
NOTE
If you cycle power, you will lose everything except saved measurement setups and
special parameters stored in non-volatile memory; therefore, make sure you use the
Save function of the Counter to retain the measurement setup prior to powering down
to set up the Limit-Detect Output line (pin 4) of RS-232 serial connector. Refer to the
appropriate section in this chapter for details on how to use Save and Recall.
2
1
To use the Limit-detect output from the serial port, perform the following steps:
a.
Save your measurement setup that includes your Limit Testing choices, by
simply pressing the Save & Print key until
SAVE: 1 is displayed, then Enter key to save to register 1.
b.
Turn off the Counter.
c.
Press and hold Recall (Utility) key, then press POWER key.
d.
Press Recall (Utility) key until DTR: is displayed.
e.
Press any one of the arrow keys until DTR: LIMIT is displayed.
2
Press Run key.
3
Press Recall (Utility) key until RECALL 1 is displayed, then wait a few seconds to
recall the measurement setup saved in register 1.
Since your measurement setup included your settings for upper and lower limits, and
LIM TEST: was set to ON, the Counter is now set for limit testing with the Limitdetect output.
If a measurement drifts out of the user-entered limits, the Limit annunciator in the
display will light. Also, pin 4 on the RS-232 connector will change state (to a lowvoltage RS-232 level) to flag each time a measurement drifts out of the limits. (RS232 voltage levels swing from ±12V.)
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Chapter 2 Operating Your Universal Counter
Using the Utility Menu
To Select the Numerical Convention for the Display
1
Press and hold Recall (Utility) key, then cycle POWER key.
2
Press Recall (Utility) key until SHOW 9 AS: is displayed.
3
Press any one of the arrow keys until your menu choice is displayed.
If you choose SHOW 9 AS: 9.0, the Counter will display a frequency
measurement similar to 12.0000000001 MHz, for example. Note that the integral
portion (12) is separated from the fractional portion of the number by a period (or
decimal point). This numerical convention is used in the USA.
2
If you choose SHOW 9 AS: 9,0, the Counter will display a frequency
measurement similar to 12,0000000001 MHz, for example. Note that the integral
portion (12) is separated from the fractional portion of the number by a comma. This
numerical convention is used in many other countries.
Your numerical convention choice for the display is stored in non-volatile memory,
and does not change when power has been off or after a remote interface reset.
To Connect the Counter to a Serial Printer via the RS-232 Port
The RS-232 port on the Counter’s rear panel is a 9-pin connector (DB-9, male
connector). You can connect the Counter to any printer with a properly configured
DTE connector (DB-25). You can use a standard Agilent 24542G or 24542H interface
cable.
Connect the Counter to a terminal or printer by simply installing an RS-232 cable
(such as an AT Printer Cable—Agilent P/N 24542H cable) between the units.
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2-65
Chapter 2 Operating Your Universal Counter
Using the Utility Menu
To Connect the Counter to a Printer via GPIB
You can connect the Counter to a printer via GPIB either with or without a computer.
If you connect a computer, you can operate the printer under program control. In the
absence of a computer, the Counter, when in talk-only, becomes the controller for the
printer.
To Select the GPIB Talk-Only Mode for Printing
Press and hold Recall (Utility) key, then cycle POWER key.
2
Press Recall (Utility) key until HP-IB: is displayed.
3
To set the GPIB to talk-only, press the appropriate arrow keys until HP-IB:
is displayed.
2
1
TALK
The TALK choice follows 30 and precedes 0 in the set of choices for the GPIB menu
item.
NOTE
BE SURE to press the Enter key to complete the numeric entry.
The talk-only operating mode is now stored in non-volatile memory, and does not
change when power has been off or after a remote interface reset.
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Chapter 2 Operating Your Universal Counter
Using the Calibration Menu
Using the Calibration Menu
Overview of the Calibration Menu
POWER
Scale &
Offset
On / Stby
The Calibration menu is accessed by holding the Scale & Offset key and cycling the
POWER key. All of the calibration factors and security settings are stored in nonvolatile memory, and do not change when power has been off or after a remote
interface reset.
The Calibration menu allows you to:
•
view the calibration security status of the Counter (CAL SECURE or CAL
UNSECURE)
•
initiate the Counter’s calibration routines, which can perform automatic
calibration of the voltage offset and gain of the front-end input amplifiers (CAL:
OFFS 1 / 2 ?, GAIN 1 / 2?), of the optional timebase (CAL: TIMEBAS?), and
of the differences in electrical path-length between channels 1 and 2 (CAL: TI
QUIK? and CAL: TI FINE?)
•
secure against calibration by entering the security code while the Counter is
unsecured (CODE:)
•
unsecure for calibration by entering the security code while the Counter is
secured (CODE:)
•
change the security code by entering a new code while the Counter is unsecured
(CODE:)
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2
The security code is set to 53131 or 53132 (corresponding to the model) when the
Counter is shipped from the factory. If you forget your security code, you can reset
the security code to the model-number default by resetting all of the non-volatile
memory to a default state. See the Agilent 53131A/132A Assembly-Level Service
Guide for more information.
Chapter 2 Operating Your Universal Counter
2
Using the Calibration Menu
NOTE
•
view the calibration count, which indicates the number of times that the Counter
has been calibrated (CAL COUNT?). The calibration count increments up to a
maximum of 32,767 after which it wraps around to 1. A calibration count of 0
indicates that the Counter is completely uncalibrated. (The calibration count is
unaffected by interpolator calibration.)
•
get Help (HELP:) with any of the following:
–
how to calibrate (CAL?),
–
how to secure (SECURE?), and
–
how to change the code (CODE?)
A good precaution is to use an GPIB program (see the programming example titled
“To Read and Store Calibration Data” in Chapter 3 of the Programming Guide) to
read and store the calibration factors prior to initiating any calibration.
To View the Calibration Menu and Security Status
The Calibration menu is accessed by holding the Scale & Offset key and cycling the
POWER key. The first item in the Calibration menu is a message indicating the
calibration security status: CAL SECURE or CAL UNSECURE.
To Unsecure for Calibration
1
Press and hold Scale & Offset key, then cycle POWER key.
CAL SECURE is displayed.
If CAL UNSECURE is displayed, then the Counter is already unsecured for
calibration, and the remaining steps are not applicable.
2
Press Scale & Offset key until CODE: is displayed.
3
Press the appropriate arrow keys to enter the security code, then press Enter key.
CAL UNSECURE is displayed.
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Chapter 2 Operating Your Universal Counter
Using the Calibration Menu
To Initiate the Calibration Routines
1
Press and hold Scale & Offset key, then cycle POWER key.
2
Unsecure for calibration by performing the preceding procedure.
3
Press Scale & Offset key until CAL: OFFS1? is displayed.
4
Press any one of the arrow keys until your calibration choice (that is, CAL: OFFS2?,
CAL: GAIN 1?, CAL: GAIN 2?, CAL: TI QUIK?, CAL: TI FINE?, or CAL:
TIMEBAS?) is displayed.
CAL:TI QUIK? and CAL:TI FINE? are two different ways to calibrate out the
differences in electrical path length between Channel 1 and Channel 2. When you
provide the calibration signal, the instrument measures how the difference in path
length translates to an average delay between the two channels.
The Quick Time Interval Calibration requires a simple input signal. You provide on
Channel 1 a clean square wave with a rapid rise time and an approximate frequency of
10 MHz. The instrument routes the calibration signal in COMMON to both channels
1 and 2, and measures the average delay between the two channels so configured. The
advantage of the Quick Calibration is that it is easy, quick, and requires little special
equipment. The disadvantage is that the calibration term is best fit for
TI measurements configured COMMON and measured from rising to rising edge; it
leaves uncorrected a small systematic error for all other configurations. The Fine
Time Interval Calibration minimizes systematic error by calibrating the instrument in
each configuration.
The Fine Time Interval Calibration requires a special calibrator signal source to
provide input—because it produces eight calibration terms, each tailored to a different
combination of input conditions. It requires the synthesizer driving the calibrator to
produce a very accurate 10 MHz waveform—because it calibrates the pulse width
configuration against the 50-nanosecond pulse width so provided. It minimizes
systematic error by calibrating the instrument in each of the eight configurations:
falling to falling edges, falling to rising edges, etc., and both SEPARATE and
COMMON routing.
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2
Note that the timebase choice (CAL: TIMEBAS?) only appears when a Timebase
Option is installed.
Chapter 2 Operating Your Universal Counter
Using the Calibration Menu
5
Press Enter key to display the setup instructions.
Notes Pertaining to the CAL: TI QUIK?
Advantage: Calibration signal is simple.
Disadvantage: One correction term for all slope and routing configurations.
Input signal: clean square wave, fast rise time, approximately 10 MHz, 1 volt
peak-to-peak, no dc offset (oscillating about 0.0 volts), driving 50Ω.
2
Timebase: Any external timebase you provide is ignored during calibration.
Procedure: From the front-panel calibration menu, one keypress invokes the
calibration.
Notes Pertaining to the CAL: TI FINE?
Advantage: Calibration minimizes systematic error for any supported
combination of input slope and routing.
Disadvantage: Calibration signal is more complex. If you perform a calibration
that you feel is erroneous and do not feel you can perform the fine calibration,
perform the CAL: TI QUIK? calibration instead, or restore the calibration
factors that you saved prior to starting.
Equipment:
Agilent 8130A Pulse Generator or equivalent.
Agilent 59992A J06 Time Interval Calibrator or equivalent.
Equipment and Counter Setup: See Figure 2-4.
HP 8130A
Pulse Generator
In A
HP 53131A/132A
Counter
B
1
Output
2
3
4
HP 59992A J06
Time Interval Calibrator
Start
Stop
Figure 2-4. Calibration Setup for CAL: TI FINE?
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Chapter 2 Operating Your Universal Counter
Using the Calibration Menu
Out of Agilent 8130A, into Agilent 59992A J06 Calibrator Signal:
PERIOD: 100 ns
WIDTH: 50 ns
High: 0.50 V
Input Mode: Normal
Low: −0.50 V
Timebase: Any external timebase you provide is ignored during calibration.
Note that CAL: TI FINE? requires the completion of four steps in order.
To Secure Against Calibration
1
Press and hold Scale & Offset key, then cycle POWER key.
CAL UNSECURE is displayed. If CAL SECURE is displayed, then the Counter is
already secured against calibration and the remaining steps are not applicable.
2
Press Scale & Offset key until CODE: is displayed.
3
Press the appropriate arrow keys to enter the security code, then press Enter key.
CAL SECURE is displayed.
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2
Procedure: From the front-panel calibration menu, one keypress invokes the
calibration. You are prompted to press buttons on the Agilent 59992A J06
Calibrator for each part of a four-part calibration.
Chapter 2 Operating Your Universal Counter
Using the Calibration Menu
To Change to a New Security Code
1
Press and hold Scale & Offset key, then cycle POWER key.
2
Unsecure for calibration by the using the procedure described in the section titled “To
Unsecure for Calibration.”
3
Press Scale & Offset key until CODE: is displayed.
4
Press the appropriate arrow keys to enter the new or customized security code, then
press Enter key.
2
A scrolling message will appear, indicating what the new code is. For example, the
Counter displays the NEW CODE IS 5 if you entered “5” as the new code.
To View the Calibration Count
1
Press and hold Scale & Offset key, then cycle POWER key.
2
Press Scale & Offset key until CAL COUNT? is displayed.
3
Press any one of the entry keys (arrow, +/−, Enter) to have a scrolling message appear,
indicating what the calibration count is.
Your Counter was calibrated before it left the factory. When you receive your
Counter, read the calibration count to determine its initial value.
To Get Help With the Calibration Menu
1
Press and hold Scale & Offset key, then cycle POWER key.
2
Press Scale & Offset key until HELP: CAL? is displayed.
3
Press any one of the arrow keys until your help choice (that is, HELP: CAL?,
HELP: SECURE?, HELP: CODE?) is displayed.
4
Press Enter key to display the help information.
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Chapter 2 Operating Your Universal Counter
Front Panel Display Messages
Front Panel Display Messages
There are four types of displays:
•
Measurement Result Displays
•
Power-Up/Self Test Messages
•
Menu Messages
•
GPIB Messages
2
Measurement Result Displays
Table 2-4. Measurement Result Displays
Display Message
Probable Cause
NEW TIMEBASE
You have selected the auto reference mode (TIMEBAS: AUTO) and the Counter
detected that the external reference became invalid during the measurement.
Therefore, the current result is not valid, and the Counter switches to using the
internal reference.
NO TIMEBASE
You have selected external reference (TIMEBAS: EXT) and there is no external
reference applied to the rear-panel Ref In connector, or the external signal is not
an allowed frequency.
1INTERP
Interpolator calibration failed on the last measurement; therefore, no valid
measurement was taken.
1MEAS
FAIL
FAIL
A measurement calibration failed on the last measurement.
DOING STATS
You have chosen to see a statistics result and the Counter is calculating
statistics, but does not have valid statistics results yet.
____________
There is no valid measurement available to display. The Counter may be stopped
between measurements while in Single mode, and you need to press the
Stop/Single key; or trigger level or input conditioning may need adjustment.
1
If this condition recurs, your Counter may need servicing.
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Chapter 2 Operating Your Universal Counter
Front Panel Display Messages
Power-Up/Self Test Messages
2
The following sequence occurs when you turn on the Counter:
NOTE
1.
All of the vacuum-fluorescent display segments and the indicators (or LEDs) are
illuminated for the power-up test.
2.
If all tests pass: SELFTST: PASS will be displayed (See NOTE below).
3.
HP-IB AT X will be momentarily displayed (where X represents the GPIB
address number), then the Counter will start taking measurements. (Note: Earlier
versions of the Counter do not display the GPIB address.)
If there is a failure, each test that fails will display a failure message, and SELFTST:
FAIL will be displayed. You must press any key in order for the Counter to go on.
Possible individual failure messages are:
FAIL: DISP
FAIL:CPU
FAIL: ROM
FAIL:RAM
FAIL: EEPROM
FAIL: HP-IB
FAIL: QSPI
FAIL: FPGA
FAIL: FR END
FAIL: MEAS
FAIL: INTERP
display test
processor test
ROM test
RAM test
EEPROM test
GPIB hardware test
serial hardware loops test
count circuit test
front end test
measurement test
interpolator test
In addition, the following power-up message may be displayed:
UNCALIBRATED
This means that at least one type of calibration has NOT been performed.
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Chapter 2 Operating Your Universal Counter
Front Panel Display Messages
Menu Messages
Table 2-5. Menu Messages
Description
(AC COUPLED)
You have selected the VOLT PEAKS function to be measured on a channel which
is ac coupled.
BAD CODE
The Counter’s calibration is secured and you have entered an incorrect code.
CAL ABORTED
Calibration was aborted because of GPIB or the user pressing a key besides the
Enter key.
CAL SECURE
You are in the Calibration menu, and the first menu item indicates that the
Counter is secure against calibration.
CAL UNSECURE
You are in the Calibration menu, and the first menu item indicates that the
Counter is unsecure for calibration.
CALIBRATING
You have invoked calibration from the Calibration menu item CAL:, and the
Counter is currently performing the calibration.
1EEPROM
You have requested that a Counter setting which is stored in the EEPROM
(HP-IB:, BAUD:, PARITY:, SW PACE:, DTR:, SHOW 9 AS:, or CAL:) be
updated, and a hardware failure has resulted.
FAIL
2
Display Message
GAIN 1 FAIL
You have invoked the GAIN 1 ? choice from the Calibration menu item CAL:, and
the calibration failed.
GAIN 1 PASS
You have invoked the GAIN 1 ? choice from the Calibration menu item CAL:, and
the calibration passed.
GAIN 2 FAIL
You have invoked the GAIN 2 ? choice from the Calibration menu item CAL:, and
the calibration failed.
GAIN 2 PASS
You have invoked the GAIN 2 ? choice from the Calibration menu item CAL:, and
the calibration passed.
IN REMOTE
You have pressed a key (other than Local) while in remote.
LOCAL LCKOUT
You have pressed the Local (Save & Print) key while in remote with local lockout.
OFFS 1 FAIL
You have invoked the OFFS 1 ? choice from the Calibration menu item CAL:,
and the calibration failed.
OFFS 1 PASS
You have invoked the OFFS 1 ? choice from the Calibration menu item CAL:,
and the calibration passed.
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Chapter 2 Operating Your Universal Counter
Front Panel Display Messages
Table 2-5. Menu Messages (continued)
Description
OFFS 2 FAIL
You have invoked the OFFS 2 ? choice from the Calibration menu item CAL:,
and the calibration failed.
OFFS 2 PASS
You have invoked the OFFS 2 ? choice from the Calibration menu item CAL:,
and the calibration passed.
NO GATE MENU
You currently have the VOLT PEAKS function selected and requested the Gate &
Ext Arm menu.
NO LIM MENU
You currently have the VOLT PEAKS or TOTALIZE function selected and
requested the Upper & Lower or Limit Modes menu.
NO MATH MENU
You currently have the VOLT PEAKS or TOTALIZE function selected and
requested the Scale & Offset menu.
NO REGISTERS
There are no registers which can be recalled and you selected the Recall menu.
NO STAT MENU
You currently have the VOLT PEAKS or TOTALIZE function selected and
requested the Stats menu.
NO TRIG MENU
You currently have the VOLT PEAKS function selected and requested the
Trigger/Sensitivity menu.
1RECALL
You have requested the Counter to perform a recall (from the Recall menu) and a
hardware failure has resulted.
2
Display Message
1SAVE
FAIL
FAIL
You have requested the Counter to perform a save (from the Save & Print menu)
and a hardware failure has resulted.
TB CAL FAIL
You have invoked the TIMEBAS? choice from the Calibration menu item CAL:,
and the calibration failed.
TB CAL PASS
You have invoked the TIMEBAS? choice from the Calibration menu item CAL:,
and the calibration passed.
TI CAL FAIL
You have invoked the TI QUIK? or TI FINE? choice from the Calibration menu
item CAL:, and the calibration failed.
TI CAL PASS
You have invoked the TI QUIK? or TI FINE? choice from the Calibration menu
item CAL:, and the calibration passed.
1
If this condition recurs, your Counter may need servicing.
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Chapter 2 Operating Your Universal Counter
Front Panel Display Messages
GPIB Messages
Table 2-6. GPIB Messages
Display Message
Description
1
HP-IB +nnnn
You have generated the GPIB error corresponding to the indicated error number.
Refer to Chapter 5, “Errors,” in the Programming Guide for a list of the error
descriptions.
1
HP-IB −nnn
You have generated the GPIB error corresponding to the indicated error number.
Refer to Chapter 5, “Errors,” in the Programming Guide for a list of the error
descriptions.
2
1
+nnnn and −nnn represent GPIB error code numbers that would actually be displayed.
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Preset Values After Power-Up and *RST
This section provides separate preset value lists for the Agilent 53131A and the
Agilent 53132A with a serial number prefix below 3646 (Table 2-7A) and
Agilent 53132A with a serial number prefix of 3646 and above (Table 2-7B) to make
it easy for you to differentiate from the counters, which have different arming
capabilities for the Time Interval measurements. This section contains the following
preset value sections or tables:
Agilent 53131A (and Agilent 53132As with serial number prefixes below 3646)
Preset Values for Functions Accessible Via Front Panel or GPIB, starts on
page 2-79.
•
Agilent 53132A (with serial number prefixes 3646 and above) Preset Values for
Functions Accessible Via Front Panel or GPIB, starts on page 2-85.
•
Agilent 53131A/132A (all Agilent 53131As and Agilent 53132As) Preset Values
for Functions Accessible Via GPIB Only, starts on page 2-91.
2
•
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646)
Preset Values for Functions Accessible Via Front Panel or GPIB
Table 2-7A lists preset values for the Agilent 53131A (and the Agilent 53132A with
serial number prefix below 3646).
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
Function-Select Parameters
yes
FREQ1
FREQ1
no
Frequency arm
yes
________
TIME
no
Frequency start arm
yes
IMMediate
________
no
Frequency stop arm
yes
TIMer
________
no
Frequency stop arm digits
yes
4
4
no
Frequency gate time
yes
100.E-3s
100.E-3s
no
Frequency ext start arm slope
yes
POS
POS
no
Frequency ext stop arm
yes
________
AUTO
no
Totalize arm
yes
________
TIME
no
Totalize start arm
yes
IMMediate
________
no
Totalize stop arm
yes
TIMer
________
no
Totalize gate time
yes
100.E-3s
100.E-3s
no
Totalize ext start arm slope
yes
POS
POS
no
Totalize ext stop arm
yes
________
EDGE
no
2
Measurement function
Frequency, Period, and Ratio
Arming Parameters
Totalize Arming Parameters
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2-79
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
Phase Arming Parameters
Phase arm
yes
IMMediate
AUTO
no
Phase ext start arm slope
yes
POS
POS
no
Time Interval arm
yes
________
AUTO
no
Time Interval start arm
yes
IMMediate
________
no
Time Interval ext start arm slope
yes
POS
POS
no
Time Interval delay enable
yes
________
OFF
no
Time Interval stop arm
yes
IMMediate
________
no
Time Interval delay
yes
10.E-3s
10.E-3s
no
Channel 1 input coupling
yes
AC
AC
no
Channel 2 input coupling
yes
AC
AC
no
Channel 1 input impedance
yes
1E+6 Ohms
1E+6 Ohms
no
Channel 2 input impedance
yes
1E+6 Ohms
1E+6 Ohms
no
2
Time Interval, Rise, Fall, Pulse,
Dutycycle Arming Parameters
Time Interval Only Arming
Parameters
Input Coupling Parameters
Input Impedance Parameters
Input Attenuation Parameters
no
Channel 1 input attenuation
yes
X1
X1
no
Channel 2 input attenuation
yes
X1
X1
no
2-80
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
Display Parameters
Display blank
no
disabled
disabled
no
Display mode (result/menu)
no
results
results
no
Channel 1 trigger level (volts)
yes
0.000V1
0.000V1
no
Channel 2 trigger level (volts)
yes
0.000V1
0.000V1
no
Channel 1 trigger level (percent)
yes
50%
50%
no
Channel 2 trigger level (percent)
yes
50%
50%
no
Channel 1 trigger slope
yes
POS
POS
no
Channel 2 trigger slope
yes
POS
POS
no
Channel 1 sensitivity
yes
100%
HIGH
no
Channel 2 sensitivity
yes
100%
HIGH
no
yes
SEPARATE
SEPARATE
no
yes
SINGLE
RUN2
no
Math on/off
yes
OFF
OFF
no
Scale
yes
1.000000
1.000000
no
Offset
yes
0.0000000000
0.0000000000
no
Trigger Level Parameters
2
Trigger Slope Parameters
Sensitivity Parameters
Input Routing Parameters
Input route for Time Interval
Measurement Control
Parameters
Run/Single selection
Math Operation Parameters
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2-81
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
2
Limits Parameters
Limit test on/off
yes
OFF
OFF
no
On fail stop/go on
yes
GO ON
GO ON
no
Lower limit
yes
0.0000000000
0.0000000000
no
Upper limit
yes
0.0000000000
0.0000000000
no
Limit display number/graph
yes
NUMBER
NUMBER
no
Stats on/off
yes
OFF
OFF
no
Stats measurement count, N
yes
100
100
no
Display measurement/stats
yes
MEAS
MEAS
no
Stats use all/in limits
yes
USE ALL
USE ALL
no
On-single measurement count
yes
1 (AUTO OFF)
1 (AUTO OFF)
no
yes
OFF
OFF
no
no
AUTO
AUTO
no
no
________3
________3
no
no
________3
________
3
no
no
________3
________
3
no
Stats Parameters
Print Parameters
Printing on/off
Timebase Parameters
Timebase auto/internal/external
Expected Frequency Parameters
Channel 1 expected frequency
Channel 2 expected frequency
Channel 3 expected frequency
2-82
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
Auto-Frequency Parameters
Channel 1 auto-frequency on/off
no
ON
ON
no
Channel 2 auto-frequency on/off
no
ON
ON
no
Channel 3 auto-frequency on/off
no
ON
ON
no
no
________4
________4
yes, (2048)
no
________4
________4
yes, (2048)
Channel 1 trigger gain cal
no
________4
________4
yes, (1700)
Channel 2 trigger gain cal
no
________4
________4
yes, (1700)
Time Interval Offset Cal
Parameters
no
________4
________4
yes, (2100)
no
________4
________4
yes, (2048)
GPIB address
no
________4
________4
yes,(3)
Digit separator (radix)
no
________4
________4
yes,
(USA STYLE)
Baud rate, (RS-232)
no
________4
________4
yes, (9600)
no
________4
________
4
yes, (OFF)
no
________4
________
4
yes, (XON)
no
________4
________4
Trigger Offset Cal Parameters
Channel 2 trigger offset cal
Trigger Gain Cal Parameters
Utility Menu Parameters
Option Timebase cal
Parity, (RS-232)
Pacing, (RS-232)
DTR, (RS-232)
yes,
(DTR_HIGH)
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2-83
2
Channel 1 trigger offset cal
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7A. Agilent 53131A (and Agilent 53132A With S/N Prefix Below 3646) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In
Non-VolatileMe
mory
2
Calibration Security Parameters
Secure state
no
________4
________4
yes, (SECURE)
Security code
no
________4
________4
yes, (53131 or
53132)
Calibration count
no
________4
________4
yes, (0)
1
At power-up, the trigger level is defaulted. The default value is shown in the table. The Counter retains this
value until the first auto-trigger cycle runs. Since the Counter powers up on Run mode with auto-trigger ON,
the auto-trigger cycle runs almost immediately. The default value is overwritten by a measured result almost
immediately.
At *RST, the trigger level variable is defaulted. The default value is shown in the table. Same as for power-up,
the Counter retains this value until the first auto-trigger cycle runs. However, on *RST, the Counter is set up in
Single mode, (not Run mode), with auto-trigger ON. The auto-trigger cycle runs only on initiation of a
measurement. The default value for the variable persists until overwritten by a measured result, but it may be
a long time before you request a measurement; therefore, it may be a long time that the default value
persists.
2
At power-up, you can bring up the Counter either in the Utility menu, or in the results display. The default
behavior of the Run/Single variable differs according to that choice.
When the Counter powers up in the result display, it powers up in Run mode and begins making
measurements immediately.
The Counter does not make measurements when the Utility menu is selected. (This is to reduce confusion
while the user configures major attributes of the instrument.) When you power up on the Utility menu, the
Counter is in Single. Upon exit of the Utility menu, the Counter transitions to Run automatically.
3
At *RST and at power-up, this value is undefined. The frequency-estimation routine, (“auto-frequency”
routine), is enabled. When you select auto-frequency OFF, and provide a value, the variable takes on that
value.
4
Fundamental instrument settings are stored in non-volatile RAM. These settings persist even if the Counter is
powered down and back up again. They persist if the Counter is reset over GPIB with *RST. You can change
these settings, and the changed value is stored so that it is unaffected if the Counter is powered down or
reset over GPIB with *RST.
The default values for these special features are indicated in the table. The default values are used when
new EPROMs are installed; they remain in effect until you overwrite them.
An example is the trigger calibration setting. Calibration values are defaulted until calibration is performed at
the factory. Another example is the RS-232 BAUD rate. BAUD rate is defaulted until you pick a different rate.
2-84
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Agilent 53132A (With S/N Prefix 3646 and Above) Preset Values
for Functions Accessible Via Front Panel or GPIB
Table 2-7B lists preset values for the Agilent 53132A (with serial number prefix 3646
and above).
Table 2-7B. Agilent 53132A (S/N 3646 and above) Preset Values
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
Function-Select Parameters
yes
FREQ1
FREQ1
no
Frequency arm
yes
________
TIME
no
Frequency start arm
yes
IMMediate
________
no
Frequency stop arm
yes
TIMer
________
no
Frequency stop arm digits
yes
4
4
no
Frequency gate time
yes
100.E-3s
100.E-3s
no
Frequency ext start arm slope
yes
POS
POS
no
Frequency ext stop arm
yes
________
AUTO
no
Totalize arm
yes
________
TIME
no
Totalize start arm
yes
IMMediate
________
no
Totalize stop arm
yes
TIMer
________
no
Totalize gate time
yes
100.E-3s
100.E-3s
no
Totalize ext start arm slope
yes
POS
POS
no
Totalize ext stop arm
yes
________
EDGE
no
Phase arm
yes
IMMediate
AUTO
no
Phase ext start arm slope
yes
POS
POS
no
2
Measurement function
Frequency, Period, and Ratio
Arming Parameters
Totalize Arming Parameters
Phase Arming Parameters
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2-85
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7B. Agilent 53132A (S/N 3646 and above) Preset Values (continued)
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
Pulse, Rise, Fall, Dutycycle
Arming Parameters
2
Pulse Arming Parameters
Pulse start arm
yes
IMMediate
AUTO
no
Pulse ext start arm slope
yes
POS
POS
no
Time Interval start arm
yes
IMMediate
AUTO
no
Time Interval ext start arm slope
yes
POS
POS
no
Time Interval start arm delay
yes
IMMediate
NONE
no
Time Interval start arm delay time
yes
100 E-9s
100 E-9s
no
Time Interval start arm delay events
yes
1
1
no
Time Interval stop arm
yes
IMMediate
AUTO
no
Time Interval ext stop arm slope
yes
POS
POS
no
Time Interval stop arm delay
yes
IMMediate
NONE
no
Time Interval stop arm delay time
yes
100 E-9s
100 E-9s
no
Time Interval stop arm delay events
yes
1
1
no
Channel 1 input coupling
yes
AC
AC
no
Channel 2 input coupling
yes
AC
AC
no
Channel 1 input impedance
yes
1E+6 Ohms
1E+6 Ohms
no
Channel 2 input impedance
yes
1E+6 Ohms
1E+6 Ohms
no
Time Interval Arming
Parameters
Input Coupling Parameters
Input Impedance Parameters
Input Attenuation Parameters
Channel 1 input attenuation
2-86
no
yes
X1
X1
no
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7B. Agilent 53132A (S/N 3646 and above) Preset Values (continued)
In Save/Recall
Description
Channel 2 input attenuation
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
yes
X1
X1
no
Display blank
no
disabled
disabled
no
Display mode (result/menu)
no
results
results
no
yes
0.000V1
0.000V1
no
Channel 2 trigger level (volts)
yes
0.000V1
0.000V1
no
Channel 1 trigger level (percent)
yes
50%
50%
no
Channel 2 trigger level (percent)
yes
50%
50%
no
Channel 1 trigger slope
yes
POS
POS
no
Channel 2 trigger slope
yes
POS
POS
no
Channel 1 sensitivity
yes
100%
HIGH
no
Channel 2 sensitivity
yes
100%
HIGH
no
yes
SEPARATE
SEPARATE
no
yes
SINGLE
RUN2
no
Math on/off
yes
OFF
OFF
no
Scale
yes
1.000000
1.000000
no
Offset
yes
0.0000000000
0.0000000000
no
Display Parameters
Trigger Level Parameters
2
Channel 1 trigger level (volts)
Trigger Slope Parameters
Sensitivity Parameters
Input Routing Parameters
Input route for Time Interval
Measurement Control
Parameters
Run/Single selection
Math Operation Parameters
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2-87
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7B. Agilent 53132A (S/N 3646 and above) Preset Values (continued)
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
2
Limits Parameters
Limit test on/off
yes
OFF
OFF
no
On fail stop/go on
yes
GO ON
GO ON
no
Lower limit
yes
0.0000000000
0.0000000000
no
Upper limit
yes
0.0000000000
0.0000000000
no
Limit display number/graph
yes
NUMBER
NUMBER
no
Stats on/off
yes
OFF
OFF
no
Stats measurement count, N
yes
100
100
no
Display measurement/stats
yes
MEAS
MEAS
no
Stats use all/in limits
yes
USE ALL
USE ALL
no
On-single measurement count
yes
1 (AUTO OFF)
1 (AUTO OFF)
no
yes
OFF
OFF
no
yes
AUTO
AUTO
no
no
________3
________3
no
no
________3
3
________
no
no
________3
________3
no
Channel 1 auto-frequency on/off
no
ON
ON
no
Channel 2 auto-frequency on/off
no
ON
ON
no
Channel 3 auto-frequency on/off
no
ON
ON
no
Stats Parameters
Print Parameters
Printing on/off
Timebase Parameters
Timebase auto/internal/external
Expected Frequency Parameters
Channel 1 expected frequency
Channel 2 expected frequency
Channel 3 expected frequency
Auto-Frequency Parameters
2-88
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-7B. Agilent 53132A (S/N 3646 and above) Preset Values (continued)
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
Trigger Offset Cal Parameters
no
________4
________4
yes, (2048)
no
________4
________4
yes, (2048)
no
________4
________4
yes, (1700)
Channel 2 trigger gain cal
no
4
________
________4
yes, (1700)
Time Interval Offset Cal
Parameters
no
________4
________4
yes, (2100)
Option Timebase cal
no
________4
________4
yes, (2048)
GPIB address
no
________4
________4
yes, (3)
Digit separator (radix)
no
________4
________4
yes, (USA
STYLE)
Baud rate, (RS-232)
no
________4
________4
yes, (9600)
no
4
________
________4
yes, (OFF)
Pacing, (RS-232)
no
________4
________4
yes, (XON)
DTR, (RS-232)
no
________4
________4
yes,
(DTR_HIGH)
Secure state
no
________4
________4
yes, (SECURE)
Security code
no
________4
________4
yes, (53131 or
53132)
Calibration count
no
________4
________4
yes, (0)
Channel 1 trigger offset cal
Channel 2 trigger offset cal
Trigger Gain Cal Parameters
Channel 1 trigger gain cal
Parity, (RS-232)
Calibration Security Parameters
1
At power-up, the trigger level is defaulted. The default value is shown in the table. The Counter retains this
value until the first auto-trigger cycle runs. Since the Counter powers up on Run mode with auto-trigger ON,
the auto-trigger cycle runs almost immediately. The default value is overwritten by a measured result almost
immediately.
At *RST, the trigger level variable is defaulted. The default value is shown in the table. Same as for power-up,
Operating Guide
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2-89
2
Utility Menu Parameters
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
the Counter retains this value until the first auto-trigger cycle runs. However, on *RST, the Counter is set up in
Single mode, (not Run mode), with auto-trigger ON. The auto-trigger cycle runs only on initiation of a
measurement. The default value for the variable persists until overwritten by a measured result, but it may be
a long time before you request a measurement; therefore, it may be a long time that the default value
persists.
2
At power-up, you can bring up the Counter either in the Utility menu, or in the results display. The default
behavior of the Run/Single variable differs according to that choice.
When the Counter powers up in the result display, it powers up in Run mode and begins making
measurements immediately.
2
The Counter does not make measurements when the Utility menu is selected. (This is to reduce confusion
while the user configures major attributes of the instrument.) When you power up on the Utility menu, the
Counter is in Single. Upon exit of the Utility menu, the Counter transitions to Run automatically.
3
At *RST and at power-up, this value is undefined. The frequency-estimation routine, (“auto-frequency”
routine), is enabled. When you select auto-frequency OFF, and provide a value, the variable takes on that
value.
4
Fundamental instrument settings are stored in non-volatile RAM. These settings persist even if the Counter is
powered down and back up again. They persist if the Counter is reset over GPIB with *RST. You can change
these settings, and the changed value is stored so that it is unaffected if the Counter is powered down or
reset over GPIB with *RST.
The default values for these special features are indicated in the table. The default values are used when
new EPROMs are installed; they remain in effect until you overwrite them.
An example is the trigger calibration setting. Calibration values are defaulted until calibration is performed at
the factory. Another example is the RS-232 BAUD rate. BAUD rate is defaulted until you pick a different rate.
2-90
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Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Preset Values for Functions Accessible Via GPIB Only
Table 2-8. Agilent 53131A/132A Preset Values—Accessible Via GPIB Only
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
Arming Parameters
Frequency ext stop arm slope
yes
NEG
NEG
no
Totalize ext stop arm slope
yes
NEG
NEG
no
yes
OFF
ON
no
yes
ON
ON
no
yes
MEAN
MEAN
no
Monitor external timebase
no
TRUE
TRUE
no
Interpolator calibration on/off
no
ON
ON
no
Event status enable
no
________
0
no
Service request enable
no
________
0
no
OSR enable
no
________
0
no
OSR negative transition filter
no
________
0
no
OSR positive transition filter
no
________
1809
no
QSR enable
no
________
0
no
QSR positive transition filter
no
________
18277
no
QSR negative transition filter
no
________
0
no
Error queue
no
________
cleared
no
Math, limit-test recalculate
2
Math, Limit Parameters
Reset limit-test fail count on INITiate
Statistics Parameters
Statistics type
Miscellaneous Measurement
Parameters
Status Reporting Parameters
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2-91
Chapter 2 Operating Your Universal Counter
Preset Values After Power-Up and *RST
Table 2-8. Agilent 53131A/132A Preset Values—Accessible Via GPIB Only (continued)
In Save/Recall
Description
Value at *RST
(GPIB Reset)
Value at PowerUp
In Non-Volatile
Memory
2
Miscellaneous GPIB Parameters
Response format
yes
ASCii
ASCii
no
Device trigger definition
yes
INIT
INIT
no
Macros
no
disabled
disabled
no
CONFigure? response
no
________
undefined
no
READ, FETCh function memory
no
________
________
no
2-92
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Chapter 2 Operating Your Universal Counter
Summary of the Measurement Sequence
Summary of the Measurement Sequence
Use Utility menu to:
•
choose the timebase source.
•
configure the GPIB if you intend to operate the Counter remotely.
•
set RS-232 serial port if you intend for the Counter to perform printing and/or
limit-detecting.
2
Use MEASURE menu keys to select the measurement function.
Use CHANNELs 1 and 2 keys to set up input conditioning.
Use Gate & ExtArm key to:
•
set the gate time and resolution.
•
set arming.
Use Scale & Offset key to set up math operations.
Use Uppr & Lower key to set limits.
Use Limit Modes key to set up limit testing.
Use Stats key to set up statistics and limit filtering.
Use Save & Print key to enable or disable printing.
Use Run and Stop/Single keys to control measurements.
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2-93
Chapter 2 Operating Your Universal Counter
Common Questions
Common Questions
Why is Stats result not available yet?
Your Counter has not completed N measurements yet.
Why won’t printer work?
2
Go to the Utility menu and set up serial port.
Why did Counter stop measuring?
•
Did you set the Counter to stop on limits?
•
Are all measurements outside the limits?
Why did Counter go to its default state after I set up my RS-232
port?
•
Did you save your state before you cycled power?
•
Did you restore your state after configuring the port?
Counter’s numeric display does not follow the numerical
convention for my country.
•
Go to the Utility menu and change the numerical convention to be displayed (use
the SHOW 9 AS: menu item).
How do I display the 13th digit in my numerical result?
•
Use the Offset feature. Instructions appear on page 2-31 and page 2-32 in the
section titled “Using the MATH Menu Keys.”
2-94
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3
Specifications
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Chapter 3 Specifications
Instrument Inputs
Introduction
The specifications of the Agilent 53131A/132A Universal Counter are provided in
this chapter.
Instrument Inputs
Channel 1 & 2 Input Specifications1
3
Frequency Range
DC Coupled:
AC Coupled:
DC to 225 MHz
1 MHz to 225 MHz (50 Ω)
30 Hz to 225 MHz (1 MΩ)
FM Tolerance:
25%
Voltage Range and Sensitivity (Sinusoid)2
DC to 100 MHz: 20 mVrms to ±5 V ac + dc
(75 mVrms with optional rear connectors)3
100 MHz to 200 MHz: 30 mVrms to ±5 V ac + dc
(75 mVrms with optional rear connectors)3
200 MHz to 225 MHz: 40 mVrms to ±5 V ac + dc
(75 mVrms with optional rear connectors)3
Voltage Range and Sensitivity (Single-Shot Pulse)2
4.5 ns to 10 ns Pulse Width: 100 mVpp to 10 Vpp
(150 mVpp with optional rear connectors) 3
>10 ns Pulse Width: 50 mVpp to 10 Vpp
(100 mVpp with optional rear connectors) 3
Trigger Level2
Range:
±5.125 V
Accuracy:
±(15 mV + 1% of trigger level)
Resolution:
5 mV
Damage Level
50 Ω: 5 Vrms
0 to 3.5 kHz, 1 MΩ: 350 V dc + ac pk
3.5 kHz to 100 kHz, 1 MΩ: 350 V dc + ac pk linearly derated to 5 Vrms
>100 kHz, 1 MΩ: 5 Vrms
350 Vdc + acpk
5 Vrms
0 Hz
1
2
3
Channel 1 & 2 Input Characteristics1
Impedance:
1 MΩ Capacitance:
Coupling:
Low-Pass Filter:
Input Sensitivity:
Trigger Slope:
Auto Trigger Level
Range:
Frequency:
Input Amplitude:
Attenuator
Voltage Range:
Trigger Range:
1 MΩ or 50 Ω
30 pF
AC or DC
100 kHz (or disabled)
–20 dB at > 1 MHz
Selectable between
Low, Medium, or High (default).
Low is approximately
2x High Sensitivity.
Positive or Negative
0 to 100% in 10% steps
> 100 Hz
> 100 mVpp
(No amplitude modulation)
x10
x10
1 MΩ
50Ω
3.5 KHz
100 KHz
Specifications and Characteristics for Channels 1 and 2 are identical for both Common and Separate configurations.
Values shown are for X1 attenuator setting. Multiply all values by 10 (nominal) when using the X10 attenuator setting. Note that it may be
necessary to recalibrate the input offset in the application environment (especially at high temperature) to achieve maximum sensitivity.
When ordered with optional rear terminals, the Channel 1 and 2 inputs are active on both the front and rear of the universal counter though the
specifications provided only apply to the rear terminals. Performance for the front terminals is degraded, but may be improved by terminating
the rear terminals into 50 Ω.
3-2
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Chapter 3 Specifications
Instrument Inputs (Continued)
Instrument Inputs (Continued)
Channel 3 Input Specifications4, 5
Frequency Range
Option 030
100 MHz to 3 GHz
Option 050
200MHz to 5 GHz
Option 124
200 MHz to 12.4 GHz
Power Range and Sensitivity (Sinusoid)
Option 030
100 MHz to 2.7 GHz: –27 dBm to +19 dBm
2.7 GHz to 3 GHz:
–21 dBm to +13 dBm
Option 050
200 MHz to 5 GHz:
–23 dBm to +13 dBm
Option 124
200 MHz to 12.4 GHz –23 dBm to +13 dBm
Damage Level:
Option 030
5 Vrms
Option 050
+25 dBm
Option 124
+25 dBm
External Arm Input Specifications
Impedance:
Coupling:
VSWR:
1 kΩ
17 pF
Positive or Negative
Positive or Negative
3
> 50 ns
< 250 ns
> 50 ns
10 Vrms
50 Ω
AC
< 2.5:1
External Arm Input Characteristics
Impedance:
Input Capacitance:
Start Slope:
Stop Slope:
Signal Input Range:
TTL compatible6
Timing Restrictions:
Pulse Width:
Transition Time:
Start-to-Stop Time:
Damage Level:
Channel 3 Input Characteristics
Notes:
External Arm is available for all measurements except Peak Volts.
External Arm is referred to as External Gate for some
measurements.
4
5
6
Channel 3 is available as an option.
When ordered with optional rear terminals, the Channel 3 connector on the front panel for Option 030 will be routed to the rear panel (rear
panel only). There is no degradation in specifications for this input. Option 050 and Option 124 input connectors are available on the front
panel only.
53131A—Applies to Serial Number Prefix 3710A and above.
53132A—Applies to Serial Number Prefix 3546A and above.
Below these Serial Number Prefixes, the specification is :
High-level input:
Low-level input:
>3.0 V
<1.5 V.
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3-3
Chapter 3 Specifications
Time Base
Time Base
Internal Time Base Stability
Standard
(0° to 50° C)
Temperature Stability:
(referenced to 25°C)
Aging Rate
(after 30 days)
Per Day:
Per Month:
Per Year:
High Stability Oven
(Option 010)
Ultra High Stability
Oven (Option 012)
< 5 x 10–6
< 2 x 10–7
< 2.5 x 10–9
< 2.5 x 10–9
< 3 x 10–7
< 4 x 10–8
< 2 x 10–7
< 5 x 10 –10
< 1.5 x 10–8
< 1 x 10 –10
< 3 x 10 –9
< 2 x 10 –8
Turn-on stability vs. time:
(in 30 minutes)
Calibration:
Medium Stability
Oven (Option 001)
Manual Adjust
< 2 x 10–7
(referenced to 2 hours)
< 5 x 10 –9
(referenced to 24 hours)
< 5 x 10 –9
(referenced to 24 hours)
Electronic
Electronic
Electronic
Note that power to the time base is maintained when the counter is placed in standby via the front panel switch. The internal fan will continue to
operate under this condition, to maintain long-term instrument reliability.
3
External Time Base Input Specifications
Voltage Range:
Damage Level:
200 mVrms to 10 Vrms
10 Vrms
External Time Base Input Characteristics
Threshold:
Impedance:
Input Capacitance:
Frequency (53131A):
0V
1 kΩ
23 pF
1 MHz, 5 MHz or 10 MHz
(automatic selection)
Frequency (53132A): 10 MHz
Internal vs. External Time Base Selection:
Manual:
Select Internal or External
Automatic: Internal used when External not present
(default)
Time Base Output Specifications
Output Frequency:
Voltage:
10 MHz
> 1 Vpp into 50 Ω
(centered around 0 V)
3-4
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Chapter 3 Specifications
Measurement Specifications
Measurement Specifications
Frequency, Period
Channel 1 and 2 Range: 0.1 Hz to 225 MHz
4.44 ns to 10 s
Channel 3 Range:
Option 030
100 MHz to 3 GHz
0.33 ns to 10 ns
Option 050
200 MHz to 5 GHz
0.2 ns to 5 ns
Option 124
200 MHz to 12.4 GHz 80 ps to 5 ns
(Period 2 or 3 selectable only via the GPIB interface)
For Automatic or External Arming:
For Time or Digits Arming:
(and signals < 100 Hz using Timed Arming)
LSD Displayed:
LSD Displayed:
Frequency
t re s
 --------------------------- ×
or
 Gate Time
Period
2 2 × t re s

t jitt er  Frequency
or
 -------------------------------------------------------------------------------------------- + ---------------------------- ×
 Gate Time × Number or Samples Gate Time
Period
RMS Resolution:
RMS Resolution:
2
2
 t res + ( 2 × Trigger Error ) Frequency
or
 ----------------------------------------------------------------------- ×
Gate
Time


Period
2
2
Agilent 53131A
tres
tjitter
Agilent 53132A
tres
Agilent 53132A
tres
tjitter
typical
650 ps
200 ps
see graphs for worst case resolution performance
typical 500 ps
50 ps
225 ps
3 ps
see graphs for worst case resolution performance
N
For Automatic Arming: Gate Time = ---------------------------
Number of Samples =
Gate Time x Frequency
Gate Time x 200,000
Frequency
where N = 1 for Ch1 or Ch2 Frequency < 1 MHz
4 for Ch1 or Ch2 Frequency > 1 MHz
128 for Ch3
t acc 
Systematic Uncertainty:  ± Time Base Error ± ---------------------×
Gate Time
Agilent 53131A
tacc
Agilent 53132A
tacc
typical
350 ps
100 ps
worst case
1.25 ns
500 ps
Trigger: Default setting is Auto Trigger at 50%
Frequency
or
Period
(Frequency < 200 kHz)
(Frequency > 200 kHz)
t ac c 
Systematic Uncertainty:  ± Time Base Error ± ---------------------×
Gate Time
Agilent 53131A
tacc
3
Agilent 53131A
tres
t jit ter  Frequency
 4 × t res + 2 × Trigger Error
or
 -------------------------------------------------------------------------------------------- + ---------------------------- x
Gate
Time
 Gate Time × Number or Samples
Period
Frequency
or
Period
Agilent 53132A
tacc
typical
100 ps
10 ps
worst case
300 ps
100 ps
Trigger: Default setting is Auto Trigger at 50%
The following graphs may also be used to compute errors for Period Measurements. To find the Period error (∆P), calculate the frequency of the
∆F
1
- ) and find the frequency error (∆F) from the chart. Then, calculate the period error as: ∆P =  -------  × P
input signal ( F = -- 
F
P
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3-5
Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Agilent 53131A—Worst Case RMS Resolution
Automatic or External Arming:
1E+02
Auto Armed
1ms
Frequency Error (Hz)
1E+00
10ms
100ms
1E-2
1s
1E-4
10s
1E-6
Gate
Time
1E-8
1E-10
10
100
1000
10000 100000 1000000 1E+07
1E+08 1E+09 1E+10
Input Frequency (Hz)
3
Time or Digit Arming:
1E+02
Frequency Error (Hz)
1E+00
1ms
1E-2
10ms
100ms
1E-4
1s
1E-6
10s
1E-8
1E-10
10
Gate
Time
100
1000 10000 100000 1000000 1E+07 1E+08 1E+09 1E+10
Input Frequency
The preceding graphs do not reflect the effects of trigger error. To place an upper bound on the added effect of this error term, determine the
frequency error from the appropriate graph and add a trigger error term as follows:
Automatic or External Arming
Frequency
2 × Trigger Error
Frequency Error +  ------------------------------------------------ ×
or
Gate Time
Period
3-6
Time or Digit Arming
4 × 2 × Trigger Error
Frequency Error +  -------------------------------------------------------------------------------------------- ×
Gate Time × Number of Samples
Frequency
or
Period
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Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Agilent 53132A—Worst Case RMS Resolution
Automatic or External Arming:
Frequency Error (Hz)
1E+02
1E+00
1ms
Auto Armed
10ms
1E-2
100ms
1s
1E-4
10s
1E-6
Gate
Time
1E-8
1E-10
10
100
1000
10000
100000
1000000
1E+07
1E+08
1E+09
1E+10
1E+07
1E+08
1E+09
1E+10
Input Frequency (Hz)
Time or Digit Arming:
3
Frequency Error (Hz)
1E+02
1E+00
1ms
1E-2
10ms
1E-4
100ms
1E-6
1s
1E-8
10s
Gate
Time
1E-10
10
100
1000
10000
100000
1000000
Input Frequency (Hz)
The preceding graphs do not reflect the effects of trigger error. To place an upper bound on the added effect of this error term, determine the
frequency error from the appropriate graph and add a trigger error term as follows:
Time or Digit Arming
4 × 2 × Trigger Error
Frequency Error +  -------------------------------------------------------------------------------------------- ×
 Gate Time × Number of Samples
Automatic or External Arming
Frequency
or
Period
2 × Trigger Error
Frequency Error +  ------------------------------------------------ ×


Gate Time
Frequency
or
Period
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3-7
Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Frequency Measurement Example:
Given an Agilent 53132A with a High Stability Oven that was calibrated 3 days ago, measure a 15 MHz square wave signal (which has
negligible trigger error) with a 1 second gate time. Compute the measurement error to within 2-sigma confidence.
Measurement Error = Systematic Uncertainty ± 2 × RMS Resolution
2
2

 4 × t r es + ( 2 × Trigger Error )
t acc
t ji tter 
- × Frequency
- + --------------------------=   ± Time Base Error ± ---------------------------- ± 2 ×  ------------------------------------------------------------------------------------------Gate Time

 Gate Time × Number of Samples Gate Time
Number of Samples = 200,000 since Frequency is greater than 200kHz and gate time equals 1 second
Time Base Error = Temperature Stability + 3 Days × Daily Aging Rate
= 2.5 × 10
–9
= 4.0 × 10
–9
+ 3 × ( 5 × 10
– 10
)
– 11

 4 × ( 225 × 10 – 12 s )2 + ( 2 × 0 ) 3 × 10 – 12 s
s
– 9 1 × 10
Measurement Error =   ± 4.0 × 10 ± ---------------------------- ± 2 ×  ---------------------------------------------------------------------------------- + ---------------------------- × 15MHz
1s
1s
1s × 200, 000



= ( ±4.0 × 10
–9
= ( ±4.0 × 10
–9
± 2 × ( 2.01 × 10
± 1 × 10
– 11
– 12
+ 3 × 10
– 12
) ) × 15MH z
) × 15MHz
3
= ±60.2 mHz
Which is to say that the Agilent 53132A would display results in the range 15 MHz ±60.2 mHz. Note however that the dominant error is the
Time Base Error. If an even higher stability time base is available or if the instrument can be source locked to the 15 MHz signal, then this error
term can be substantially reduced. The measurement resolution under these conditions is ±75 µHz (1 sigma) which determines the number of
digits displayed.
3-8
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Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Time Interval
Measurement is specified over the full signal ranges 7 of Channels 1 and 2.
Results Range:
–1 ns to 105 s
LSD:
53131A
53132A------------------------------------------------------------------------------------------500 ps
150 ps
2
RMS Resolution:
2
t res + Start Trigger Error + Stop Trigger Error
2
53131A
53132A
-------------------------------------------------------------------------------------------750 ps
300 ps
tres
Systematic Uncertainty: ±(Time Base Error × TI) ± Trigger Level Timing Error ± 1.5 ns Differential Channel Error (Agilent 53131A)
± 900 ps Differential Channel Error (Agilent 53132A)
Time Interval Delay
After a Time Interval Measurement has begun by satisfying the trigger conditions on Channel 1, the instrument will wait for the
user-entered delay time to elapse before the end-of-measurement trigger will be accepted on Channel 2. Please refer to Measurement
Arming for additional information.
Frequency Ratio:1
⁄
Ch2
⁄
C h1
⁄
Ch2
C h3
Ch1
Ch3
⁄
C
3
Measurement is specified over the full signal range of each input.
Results Range:
10–10 to 1011
‘Auto’ Gate Time:
100 ms (or sufficient cycles on Channel 2 or 3 to make a valid measurement, whichever is longer)
LSD:
1
Rat io 1⁄ 2 : -----------------------------------------------------------Ch2 Freq × Gate Time
1
Rat io 1⁄ 3 : -----------------------------------------------------------Ch3 Freq × Gate Time
Ch2 Freq
Rat io 2⁄ 1 : ------------------------------------------------------------------2
( Ch1 Freq ) × Gate Time
Ch3 Freq
Rat io 3⁄ 1 : ------------------------------------------------------------------2
( Ch1 Freq ) × Gate Time
RMS Resolution:
2
2
2 × 1 + ( Ch1 Freq × Ch2 Trigger Error )
Ratio 1⁄ 2 : --------------------------------------------------------------------------------------------------------------Ch2 Freq × Gate Time
2 × 1 + ( Ch1 Freq × Ch3 Trigger Error )
Ratio 1⁄ 3 : --------------------------------------------------------------------------------------------------------------Ch3 Freq × Gate Time
2
2 × Ch2 Freq × 1 + ( Ch1 Freq × Ch2 Trigger Error ) Ratio 2⁄ 1 : ---------------------------------------------------------------------------------------------------------------------------------------------2
( Ch1 Freq ) × Gate Time
2
2 × Ch3 Freq × 1 + ( Ch1 Freq × Ch3 Trigger Error ) Ratio 3⁄ 1 : ---------------------------------------------------------------------------------------------------------------------------------------------2
( Ch1 Freq ) × Gate Time
To minimize relative phase measurement error, connect the higher frequency signal to Channel 1 when possible.
7
See Specifications for Pulse Width and Rise/Fall Time measurements for additional restrictions on signal timing characteristics.
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3-9
Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Pulse Width
Measurement is specified over the full signal range of Channel 1. The width of the opposing pulse must be greater than 4 ns (e.g., when
measuring the positive pulse width, the negative pulse width must be greater than 4 ns).
Pulse Selection:
Positive or Negative
Trigger:
Default setting is Auto Trigger 8 at 50%
Results Range:
5 ns to 105 s
53131A
53132A------------------------------------------------------------------------------------------500 ps
150 ps
LSD:
2
RMS Resolution:
2
t res + Start Trigger Error + Stop Trigger Error
tres
Systematic Uncertainty:
± (Time Base Error ×
2
53131A
53132A
-------------------------------------------------------------------------------------------750 ps
300 ps
Pulse Width) ± Trigger Level Timing Error±1.5 ns Differential Channel Error (Agilent 53131A)
± 900 ps Differential Channel Error (Agilent 53132A)
Rise/Fall Time
3
Measurement is specified over the full signal ranges of Channel 1. The interval between the end of one edge and start of a similar edge
must be greater than 4 ns. (e.g., when measuring a rising edge, 4 ns must elapse between the 90% point of one rising edge and the
10% point of the next rising edge).
Edge Selection:
Positive or Negative
Trigger:
Default setting is Auto Trigger 8 at 10% and 90%
Results Range:
5 ns to 105 s
53131A
53132A
-------------------------------------------------------------------------------------------500 ps
150 ps
LSD:
2
RMS Resolution:
2
t res + Start Trigger Error + Stop Trigger Error
tres
Systematic Uncertainty:
± (Time Base Error ×
2
53131A
53132A------------------------------------------------------------------------------------------750 ps
300 ps
Transition Time) ± Trigger Level Timing Error ±1.5 ns Differential Channel Error (Agilent 53131A)
± 900 ps Differential Channel Error (Agilent 53132A)
Phase
Measurement is specified over the full signal range of Channels 1 and 2.
Results Range:
–180° to +360°
RMS Resolution:
tres
Systematic Uncertainty:
8
2
Phase
2
2
( t res + ( 2 × Trigger Error ) ) ×  1 +  -----------------  × Frequency × 360°

 360°  
53131A
53132A------------------------------------------------------------------------------------------750 ps
300 ps
(± Trigger Level Timing Error ± 1.5 ns Differential Channel Error) × Frequency × 360° (Agilent 53131A)
(± Trigger Level Timing Error ± 900 ps Differential Channel Error) × Frequency × 360° (Agilent 53132A)
Restrictions noted on page 3-2 for Auto Trigger apply to the proper operation of these measurements. The Peak Volts measurement is used to
determine the signal amplitude and inaccuracies from this, noted on page 3-11, should be included in calculating the Trigger Level Timing Error.
3-10
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Chapter 3 Specifications
Measurement Specifications (Continued)
Measurement Specifications (Continued)
Duty Cycle
Measurement is specified over the full signal range of Channel 1. However, both the positive and negative pulse widths must be greater
than 4 ns.
Results Range:
0 to 1 (e.g. 50% duty cycle would be displayed as .5)
RMS Resolution:
tres
2
2
2
( t r es + ( 2 × Trigger Error ) ) × ( 1 + Duty Cycle ) × Frequency
53131A
53132A------------------------------------------------------------------------------------------750 ps
300 ps
Totalize
Measurement is specified over the full signal range of Channel 1.
Results Range:
0 to 1015
Resolution:
± 1 count
Peak Volts
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3-11
3
Measurement is specified on Channels 1 and 2 for DC signals; or for AC signals of frequencies between 100 Hz and 30 MHz with peak-topeak amplitude greater than 100 mV. (The measurement will continue to operate up to 225 MHz, though results are for indication only.)
Results Range:
–5.1 V to +5.1 V
Resolution:
10 mV
Systematic Uncertainty for AC signals: 25 mV + 10% of V
for DC signals: 25 mV + 2% of V
Use of the input attenuator multiplies all voltage specifications (input range, results range, resolution and systematic uncertainty) by a
nominal factor of 10. For example with AC signals, the Systematic Uncertainty becomes: 250 mV + 10% of V.
Chapter 3 Specifications
Measurement Definitions
Measurement Definitions
Definitions of Systematic Uncertainty Terms
•
Trigger Error
External source and input amplifier noise may advance or delay the trigger points that define the beginning and end of a measurement.
The resulting timing uncertainty is a function of the slew rate of the signal and the amplitude of spurious noise spikes (relative to the input
hysteresis band).
The (rms) trigger error associated with a single trigger point is:
2
2
( E i nput ) + ( Esi gnal )
Trigger Error = ------------------------------------------------------------------------------------------------------- (in seconds)
Input Signal Slew Rate at Trigger Point
where
Einput = RMS noise of the input amplifier: 1 mVrms (350 µVrms typical). Note that the internal measurement algorithms significantly
reduce the contribution of this term.
Esignal = RMS noise of the input signal over a 225 MHz bandwidth (100 kHz bandwidth when the low-pass filter is enabled). Note that
the filter may substantially degrade the signal’s slew rate at the input of the trigger comparator.
For two-trigger-point measurements (e.g. Rise Time, Pulse Width), the Trigger Errors will be referred to independently as Start Trigger Error
and Stop Trigger Error.
3
•
Trigger Level Timing Error
Trigger level timing error results from a deviation of the actual trigger level from the specified (indicated) level. The magnitude of the
measurement timing error depends on several factors, primarily: resolution and accuracy of the trigger level circuit, fidelity of the input
amplifier, slew rate of the input signal at the trigger point, and width of the input hysteresis band (see illustration).
Actual Trigger Point:
Slope
Upper Hystersis Limit
0.5
Hysteresis Band
0.5
Hysteresis Band
Trigger Level Setting
Lower Hystersis Limit
Amplitude
Time
Actual Trigger Point:
Slope
Trigger Level Timing Errors
Trigger level timing error is associated with Time Interval, Pulse Width, Rise Time, Fall Time, Phase, and Duty Cycle measurements.
The following equations define the general interpretation of its component error terms for a measurement. These should be summed
together to obtain the overall Trigger Level Timing Error.
0.5 × Hysteresis Band
0.5 × Hysteresis Band
Input Hysteresis: --------------------------------------------------------------------------------------------------------------------- – --------------------------------------------------------------------------------------------------------------------Input Signal Slew Rate at Start Trigger Point Input Signal Slew Rate at Stop Trigger Point
15 mV ± ( 1% × Start Trigger Level Setting )
15 mV ± ( 1% × Stop Trigger Level Setting )
Trigger Level Setting: ±--------------------------------------------------------------------------------------------------------------------- ± --------------------------------------------------------------------------------------------------------------------Input Signal Slew Rate at Start Trigger Point Input Signal Slew Rate at Stop Trigger Point
3-12
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Chapter 3 Specifications
Measurement Definitions (Continued)
Measurement Definitions (Continued)
•
Fractional Time Base Error
Time base error is the maximum fractional frequency variation of the time base due to aging or fluctuations in ambient temperature or line
voltage:
∆f
Time Base Error =  ---- f
aging rate
∆f
+ ----f
temperature
∆f
+ ----f

line voltage 
Multiply this quantity by the measurement result to yield the absolute error for that measurement. Averaging measurements will not reduce
(fractional) time base error. The Agilent 53131A/132A universal counters exhibit negligible sensitivity to line voltage; consequently this term
may be ignored.
Differential Channel Error
•
The Differential Channel Error term included in many of the Systematic Uncertainty equations accounts for channel-to-channel mismatch
and internal noise. This error can be substantially reduced by performing the TI Calibration in the temperature environment in which future
measurements are to be made and by careful measurement technique. Calibration is accessible via the Calibration Menu during power-up.
Typical Versus Worst Case Specifications
Specifications identified as “Typical” represent performance of the instrument that the majority of users will perceive under a wide variety of
conditions and signals. The specifications identified as “Worst Case” should be used when the instrument is under extreme environmental
conditions or when the accuracy of the measurement results are critically important.
Time Interval Measurement LSD Definition
Additional Considerations for Digits and Time Arming Modes
For sample rates defined below, resolution will be reduced by up to 1 decade. The instruments display detects this condition and displays a
reduced-resolution result. Resolution is reduced in a band about f s, such that
10MHz
x.y = ------------------fs
For Example:
where x is any integer, and y is any fraction in the set:
,
1
⁄
3,
2
⁄
3,
1
⁄
4,
2
⁄
4,
3
⁄
4,
1
⁄
5,
2
⁄
5,
The width of the band is at most:
3
⁄
5,
10MHz
25.25 = ----------------------------396, 039.6
x = 25
y = 0.25 =
1
⁄
4
–7
6 × 10 × f input
±---------------------------------------Gate Time
The value of fs is not available to the user, but the instrument can be queried over GPIB to determine if this condition exists.
After the measurement completes, use the query :DIAGnostic:MEASure:PRESolution? The response is an ASCII text formatted string “Ø”
for normal resolution and “1” for reduced resolution. This command is valid only when making frequency measurements in time or digits
arming and the input frequency is greater than 100 Hz.
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3-13
3
For the Time Interval, Pulse Width, and Rise/Fall Time measurements, the LSD is the measurement quantization error. “ t res” is the LSD
plus the effects of certain internal error producing sources.
Chapter 3 Specifications
Measurement Arming and Processing
Measurement Arming and Processing
Gate Time
Measurement Throughput
Auto Mode, or 1 ms to 1000 s
GPIB ASCII:
200 Measurements/s (maximum)
(See examples in the Programming Guide for ways to optimize
measurement throughput)
3
Measurement Arming
Start Measurement:
Free Run, Manual, or External
Stop Measurement:
Continuous, Single, External, or Timed
Arming Modes:
(Note that not all arming modes are available for every measurement function.)
Auto Arming:
Measurements are initiated immediately and acquired as fast as possible, using a minimum number of signal
edges. Auto arming offers the highest measurement throughput, though measurement resolution may be
reduced.
Timed Arming:
The duration of the measurement is internally timed to a user-specified value (also known as the “gate time”).
This mode should be used when the length of the measurement time must be controlled.
Digits Arming:
Measurements are performed to the requested resolution (number of digits) through automatic selection of the
acquisition time. This is the most convenient mode for when a specific measurement resolution is desired.
External Arming:
An edge on the External Arm Input enables the start of each measurement. Depending on the measurement
function, Auto Arming, Timed arming modes or another edge on the External Arm Input may be used to complete
the measurement.
Time Interval
Arming Modes:
Agilent 53131A
Time Interval Stop Delay Arming: The Stop Measurement condition on Channel 2 is inhibited (trigger hold-off) for
a user specified time following the Start Measurement on Channel 1.
Time Interval Delay Range:
100 µs to 10 s*
Time Interval Delay Resolution:
10 µs from 100 µs to 100 ms
1 ms from 100 ms to 10 s
Agilent 53132A
Time Interval Start Delay Arming: The start of a Time Interval measurement is delayed for a user-specified
amount of time, or number of Channel 2 events, from the Start External Arming edge.
Start Delay TimeRange:
100 ns to 999.9999 ms
Start Delay Time Resolution:
100 ns
Start Delay Event Range:
1 to 99,999,999 Channel 2 events
Start Delay Event Rate:
5 MHz maximum
Start Delay Event Setup Time:
30 ns minimum
Time Interval Stop Delay Arming: The Stop Measurement condition on Channel 2 is inhibited (trigger hold-off) for
a user-specified amount of time, or number of Channel 2 stop events, following the Start Measurement on
Channel 1, or, if enabled, the Stop External Arming edge.
Stop Delay Time Range:
100 ns to 10 s**
Stop Delay Time Resolution:
100 ns from 100 ns to 1 s
1 ms from 1 s to 10 s
Stop Delay Event Range:
1 to 99,999,999 Channel 2 events
Stop Delay Event Rate:
5 MHz maximum
Stop Delay Event Setup Time:
30 ns minimum
* For firmware revisions below 3427 the valid range of delay is 1 ms to 10 s.
** For firmware revisions below 3646 the valid range of delay is 1 ms to 10 s.
3-14
Operating Guide
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Chapter 3 Specifications
Measurement Arming and Processing (Continued)
Measurement Arming and Processing (Continued)
Measurement Statistics
Available Statistics:
Mean, Minimum, Maximum, Standard Deviation
Number of Measurements: 2 to 1,000,000. Statistics may be collected on all measurements or on only those which are between the limit
bands. When the Limits function is used in conjunction with Statistics, N (number of measurements) refers to the
number of in-limit measurements. In general, measurement resolution will improve in proportion to N , up to the
numerical processing limits of the instrument.
Measurements:
Statistics may be collected for all measurements except Peak Volts and Totalize.
Measurement Limits
Limit Checking:
Display Modes:
Out-of-Limits Indication:
Operating Guide
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3-15
3
The measurement value is checked against user-specified limits at the end of each measurement.
The measurement result may be displayed as either the traditional numeric value or graphically as an asterisk
moving between two vertical bars. These bars define the upper and lower limits, and the asterisk represents the
current measurement result relative to these limits.
The out-of-limits condition can be indicated by any of the following methods:
• The limits annunciator will light on the front panel display.
• The instrument will generate an SRQ if enabled via GPIB.
• The limits hardware signal provided via the RS-232 connector will go low for the duration of the out-of-limit
condition (see the description of this connector under the General Information section of this specifications
table).
• If the Analog Display mode is enabled, the asterisk appears outside the vertical bars, which define the upper
and lower limits.
Chapter 3 Specifications
General Information
General Information
Save and Recall:
Up to 20 complete instrument setups may be saved and recalled later. These setups are retained when
power is removed from the universal counter.
88.5 mm x 212.6 mm x 348.3 mm
3.5 kg maximum
AC Line Supply
DC Supply (Option 002 Only)
Rack Dimensions (HxWxD):
Weight:
Power Supply Voltage:
100 to 120 VAC ±10% - 50, 60 or 400 Hz ±10%
220 to 240 VAC ±10% - 50 or 60 Hz ±10%
AC Line Voltage Selection: Automatic
170 VA maximum (30 W typical)
Power Requirements:
3
Operating Environment:
Storage Environment:
Remote Interface:
GPIB Interface Capabilities:
Remote Programming Language:
Safety:
EMC:
RS-232C:
Note on Pin 4:
10 to 32 VDC, 3-pin male XLR connector
Option 002 may not be ordered with Option 060
4A initial inrush at 10 VDC
3A max, once stabilized
0° C to 55° C
–40° C to 71° C
GPIB (IEEE 488.1-1987, IEEE 488.2-1987)
SH1, AH1, T5, TE0, L4, LE0, SR1, RL1, PP0, DC1, DT1, C0, E2
SCPI-1992.0 (Standard Commands for Programmable Instruments)
Designed in compliance with IEC 1010-1, UL 3111-1 (draft), CAN/CSA 1010.1
CISPR-11, EN50082-1, IEC 801-2, -3, -4
Electrostatic Discharge and Fast Transient/Burst Immunity Testing: When the product is operated at
maximum sensitivity (20 mVrms) and tested with 8kV AD according to IEC801-2 or with 1kV power line
transients according to IEC 801-4, frequency miscounts may occur that will affect measurement data
made during these disturbances.
Radiated Immunity Testing: When the product is operated at maximum sensitivity (20 mVrms) and tested
at 3 V/m according to IEC 801-3, external 100 to 200 MHz electric fields may cause frequency miscounts.
The rear-panel RS-232 connector is a 9-pin connector (DB-9, male). You can connect the universal
counter to any terminal or printer with a properly configured DTE connector (DB-25). You can use a
standard interface cable (Agilent part number 24542G or 24542H). Data is “output only”; the instrument
cannot be programmed via the RS-232 interface.
May be used as either a DTR signal or an indication of measurement in-limit as configured by the Utility menu.
When used as an in-limit indicator, the signal will be high for every measurement within the user set limits.
1 2 3 4 5
6 7 8 9
Pin Number
Type
2
Input
3
Output
Transmit Data (TxD)
4
Output
Data Terminal Ready (DTR)
Measurement In-Limit Signal
5
—
6
Input
*
3-16
Description
Receive Data (RxD) (for Xon/Xoff only)
Signal Ground
Data Set Ready (DSR)
All other pins: no connection
Operating Guide
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Index
SYMBOLS
+/- key , 1-18, 2-8
NUMERICS
10 MHz Output connector , 1-11
100 kHz Filter key, 2-44
50W/1 MW key , 1-16, 2-44
A
abort, 2-5
ac line selection , 1-11
accessories
available , xix
supplied, xix
addressed (talk/listen), 2-58
adjusting trigger level, 2-48
annunciators, front panel, 1-9
arming modes
auto, xvi, 2-16
digits , xvi, 2-17
external, xvi, 2-17
time, xvi, 2-17
arrow keys
entry/select keys, 2-8
auto arming, 2-16
auto triggering, 2-48
available options, xviii
B
baud rate , 2-62
C
CAL SECURE, 2-71
CAL UNSECURE, 2-68, 2-71
calibration , 2-67
count, 2-72
Help menu , 2-72
initiate , 2-69
new security code, 2-72
unsecure , 2-68
Calibration menu , 1-8, 2-67
Operating Guide
changing the numerical convention of the
display, 2-65
changing the slope, 2-49
changing trigger mode, 1-17
characters
*, 1-10
X, 1-10
choosing HIGH to disable hardware
pacing., 2-62
choosing HW PACE, 2-62
choosing the timebase source, 2-59
COMMON 1
ON, 2-45
common questions, 2-94
computing Stats on filtered data only, 1-32
configuring the RS-232 for sending limitdetect output, 2-64
connecting to a printer via GPIB, 2-66
connecting to a serial printer via the RS-232
port, 2-65
controlling measurement, 1-36
counter description, xvi
coupling, 2-51
D
data entry keys
numeric entry, 2-8
DC/AC key, 1-15 , 2-44
definition of sensitivity, 2-46
description of
display annunciators, 1-9
entry/select (arrow) keys, 2-8
Gate & ExtArm Menu key, 2-16
input conditioning toggle keys, 2-51
LIMITS keys
Limit Modes, 2-37
Uppr&Lower, 2-37
Local key, 1-4
MATH keys
Scale & Offset key, 2-27
Index-1
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Index
Stats , 2-32
MEASURE keys
Freq & Ratio, 2-10
Other Meas, 2-10
Time & Period , 2-10
Print menu , 2-56
Recall menu , 2-52
Remote indicator, 1-4
Run key, 2-5
Save menu , 2-52
scale and offset, 1-19
self-test routines, 2-59
special character, display, 1-10
Stop/Single key, 2-5
Trigger/Sensitivity menu key, 2-44
Utility menu , 2-57
description of counter, xvi
differences between firmware revisions, xx
digits arming, 2-17
digits, displaying more , 2-94
digits, thirteenth, 2-94
disabling Limit Testing , 1-30
disabling Math, 1-22
display
menu messages, 2-75
messages, 2-73
numerical convention
other countries, 2-65
USA, 2-65
power-up/self test messages, 2-74
SHOW
GRAPH, 2-40
NUMBER , 2-41
display annunciators, 1-9
display special character , 1-10
display thirteenth digit, 2-94
displaying Math results, 1-22
displaying Stats after filtering data of input
signal, 1-34
DTR (Data Terminal Ready) menu, 2-62
duty cycle, 2-14
E
Enter key, 2-8
Index-2
entering numeric values, 2-8
entering offset value, 1-21
entering scale value, 1-20
entry/select keys
arrow keys, 2-8
equation
scale and offset, 1-19
example procedure for
changing the number of digits of
resolution, 2-25
computing Stats, 2-33
easy viewing of Stats, 2-34
filtering data (using limits) during
Stats, 2-35
Gate and External Arm, 2-24
Offset function, 2-29
running the self test, 2-61
Scale function, 2-28
setting the Offset from the last
measurement value, 2-31
setting trigger voltage and sensitivity
levels, 2-48
turning off Math mode, 2-30
turning off Stats mode, 2-36
using the Common 1 function to make
time interval measurements, 2-51
Example Procedure for Turning Off Math
Mode, 2-30
Ext Arm connector, 2-17, 2-18, 2-20, 2-24
External Arm input connector, 1-11
external arming, 2-16, 2-17
External Reference Input connector, 1-11
F
falltime, 2-13
fan, 1-2, 1-11
Features and Functions
Recall, 2-52
Save, 2-52
sensitivity, 2-46, 2-47
Unsave, 2-55
fine time interval calibration, 2-69
firmware revisions, xx
Freq & Ratio key, 2-10
Operating Guide
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Index
frequency, 2-11
frequency ratio, 2-12
front-panel indicators, 1-3, 1-4
front-panel menus, 1-5, 1-6, 1-7, 1-8
function
duty cycle, 2-14
fall time, 2-13
frequency, 2-11
frequency ratio, 2-12
period, 2-13
phase , 2-15
pulse widths, 2-14
rise time , 2-13
time interval, 2-13
totalize , 2-14
voltage peaks, 2-15
G
Gate, 2-16
Gate and External Arming menu, 2-16
auto, 2-16
digits , 2-17
external, 2-17
time, 2-17
Gate time and resolution , 2-17
GPIB Address, 2-58
GPIB connector, 1-11
GPIB messages , 2-77
GPIB to talk-only , 2-66
H
hardware pacing, 2-62
how to make measurements , 1-12
how to set limits, 1-23
hysteresis, 2-46
I
impedance , 2-51
in case of trouble, 2-94
indicators (LEDs), 1-3, 1-4
initiating measurements, 2-5
input calibration, 2-69
input conditioning keys, 2-44
input impedance, 2-51
Operating Guide
L
Legend, 1-13
Limit testing, 2-38
Limit-detect output, 2-43, 2-64
Limit-Detect Output connector, 1-11
Limits Testing Example 1—Flag and Stop
Measuring On Limits, 2-38
Limits Testing Example 2—Flag On Limits
but Continue Measuring, 2-40
Limits Testing Example 3—Use Analog
Graph Display While Adjusting Input
Signal, 2-40
Limits Testing Example 4—Selecting
Filtering Conditions of Stats
Computation, 2-42
Limits Testing Example 5—Sending the
Limit-Detect Output, 2-43
list of options, xviii
Local key, 1-4, 2-75
low pass filter, 2-51
M
making a single measurement, 1-36
making repetitive measurements, 1-36
making the Counter flag on limits but
continue measuring when the signal
exceeds the user-entered limits, 1-28
Math
offset, 2-27
scale, 2-27
Math menu, 2-27
MEASURE keys
Freq & Ratio, 2-10
Other & Meas, 2-10
Time & Period, 2-10
measurement control keys, 2-5
Run key, 2-5
Stop/Single key, 2-5
measurement function menus, 2-10
measurement sequence, 2-93
measuring duty cycle, 2-14
measuring falltime, 2-13
measuring frequency, 2-11
measuring frequency ratio, 2-12
Index-3
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Index
measuring period , 2-13
measuring phase, 2-15
measuring positive/negative pulse
widths, 2-14
measuring positive/negative voltage
peaks , 2-15
measuring risetime , 2-13
measuring time interval, 2-13
common , 2-51
measuring, totalize, 2-14
menu messages, 2-75
menus of
100kHz Filter key, 1-6
50 Ohm/1M Ohm key, 1-6
Calibration (Scale & Offset) key , 1-8
DC/AC key, 1-6
Freq & Ratio key , 1-5
Gate & ExtArm key, 1-5
Limit Modes key, 1-5
Other Meas key , 1-5
Recall key , 1-6
Save & Print key, 1-6
Scale & Offset key , 1-5
Stats key, 1-5
Time & Period key, 1-5
Trigger/Sensitivity key , 1-6
Uppr & Lower key, 1-5
Utility key , 1-7
X10 Attenuate key, 1-6
messages
front panel, 2-73
GPIB , 2-77
menu , 2-75
power-up/self-test, 2-74
modifying input trigger level, 1-17
N
new security code entry, 2-72
numeric entry for a menu item , 2-4
numerical convention, 2-65
O
offset, 1-19, 2-27
ON SINGLE menu item , 2-6
Index-4
options, xviii
oscillator adjust potentiometer, 1-11
Other Meas key, 2-10
P
pace
software, 2-63
pacing, 2-62
parity, 2-63
parity type, 2-62
peaks, 2-15
performing statistics on measurements, 1-31
period, 2-13
phase, 2-15
preface, xi
preset value lists, 2-78
preset values, 2-78, 2-79 , 2-85
presetting the Counter, 2-4
PRINT
ON, 2-62
print function, 2-56
printer
connect Counter to printer, 2-66
printing, 2-56
pulse widths, 2-14
Q
questions, 2-94
quick reference guide, xxiii
quick time interval calibration, 2-69
R
ratio, 2-12
Recall function, 2-54
recalling measurement setups, 2-52
related documents, xiii
remote, 1-4
Remote indicator (LED), 1-4
repackaging for shipment, xv
resetting the Counter, 2-4
resolution, 2-17
revision
firmware, xx
risetime, 2-13
Operating Guide
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Index
RS-232 interface, 1-11
RS-232 serial port, 2-43
Run key, 2-5
run mode, 2-5
running the self-test routines, 2-59
S
Save function, 2-53
saving measurement setups, 2-52
Scale & Offset key , 1-19
scale and offset equation, 1-19
Scale and Offset functions, 2-27
Securing against calibration , 2-71
security status , 2-68
selecting input sensitivity, 1-19
selecting input trigger slope , 1-18
Selecting Operating Mode (Talk/Listen, TalkOnly), 2-58
selecting sensitivity, 2-50
selecting the type of Statistics (Stats) , 1-31
self test messages , 2-74
self-test, 2-59
sending limit-detect output, 2-43
sensitivity, 1-19 , 2-46
serial port, 2-43 , 2-62
SET OFFSET ? , 2-31
setting lower limit, 1-26
Setting the Baud Rate, 2-62
Setting the Hardware Pacing, 2-62
Setting the GPIB Address, 2-58, 2-66
Setting the GPIB address, 2-58
Setting the Parity , 2-63
Setting the Software Pace, 2-63
setting upper limit, 1-24
sign (+/-) key , 1-18
sign key, 2-8
Single key , 2-5
single measurement, 1-36
single mode , 2-5
software pace, 2-63
software pacing , 2-62
specifications, 3-2
Agilent 53131A/132A, 3-2
dimensions, 3-16
Operating Guide
frequency range, 3-2
measurement throughput, 3-14
power supply voltage, 3-16
RS-232C connector pin assignments, 3-16
time base stability, 3-4
voltage range and sensitivity, 3-2
starting measurements, 1-19
Stats function, 2-32
stop, 2-5
summary of measurement sequence, 2-93
SW PACE, 2-62, 2-63
T
talk/listen, 2-58
talk-only, 2-58, 2-66
TEST, 2-59
The Gate & External Arm Key Menus, 2-19,
2-23
thirteenth digit, 2-94
Time & Period key, 2-10
time arming, 2-17
time interval
common, 2-45
separate, 2-13
time Interval delay arming, 2-17, 2-20
timebase
auto, 2-59
calibration, 2-67, 2-69
external, 2-59
internal, 2-59
timebase source, 2-59
totalize, 2-14
trigger band, 2-50
trigger level, 2-48
trigger slope, 2-49
types of measurement functions, 2-10
types of service available if your instrument
fails, xiv
U
Unsave, 2-55
using Enter key, 2-8
using LIMITS, 2-38
using ON FAIL
Index-5
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Index
GO ON menu item , 1-29
STOP menu item , 1-28
using SET OFFSET ?, 2-31
using SHOW
Stats menu item , 2-33
using Stats key , 2-33
using the +/- (sign) key, 1-18
using the arrow keys
to change states of menu items, 2-9
to enter numeric values, 2-8
to execute prompted event messages , 2-9
to execute prompted help messages, 2-9
to sequence through the menus of the
MEASURE keys, 2-8
using the Calibration Menu, 2-67
using the entry select keys
to enter numeric values, 2-8
using the entry/select keys
to change states of menu items, 2-9
to execute prompted event messages , 2-9
to execute prompted help messages, 2-9
to sequence through the menus of the
MEASURE keys, 2-8
using the Ext Arm connector, 2-24
using the Gate & ExtArm key , 2-24
using the input coupling toggle keys , 1-15
using the input impedance toggle keys , 1-16
using the Math operations
offset, 2-28
scale, 2-28
using the measurement control keys
Run key, 2-6
Stop/Single key, 2-6
using the Print menu , 2-56
using the Recall function, 2-54
using the Save function, 2-53
using the Scale & Offset, 2-28
using the Scale & Offset key, 2-28
using the Trigger/Sensitivity key, 2-48
using the Unsave function , 2-55
Utility menu , 1-7, 2-4, 2-57
X
X10 Attenuate key, 2-44
V
voltage peaks, 2-15
Index-6
Operating Guide
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