Equipment information

Fluke PM6681 Frequency counter
Manufacturer:
Fluke
Model: PM6681
Date: 2000
Category: Measurement instruments
Group: Frequency counter
Description: Timer Counter Analyzer
Information:
                                    Introduction

Your PM 6680B/6681 Timer/Counter is designed to bring you a
new dimension to bench-top and system counting. It offers
significantly increased performance compared to traditional
Timer/Counters. The PM 6680B offers the following advantages:

-	10 digits of frequency resolution per second and 250 ps
resolution, as a result of high-resolution interpolating
reciprocal counting

-	A 1.3, a 2.7, a 4.2 and a 4.5 GHz input frequency option

In addition to the above the PM 6681 offers the following
advantages:

-	11 digits of frequency resolution per second and 50 ps
resolution, as a result of 100 MHz dock in addition to
interpolating

-	Integrated high performance GPIB interface using SCPi commands

-	Timestamping; PM 6681 records exactly when a measurement
is made

-	A high measurement rate of up to 8500 readings/s to
internal memory
New powerful and versatile functions

A unique performance feature In your new instrument is the
complete arming possibilities, which allow you to
characterize virtually any type of complex signal concerning
frequency and time.

For instance, you can insert a delay between the external
arming condition and the actual arming of the counter. You
can set this delay to a preset time or a number of trigger
events, whereby you can for example measure the width of
pulse No. 17 after the arming pulse. Read more about Arming
in Chapter 5, ‘Measurement Control’.

The counter has a multitude of measuring functions such as
phase, duty factor, rise/fall-time, peak voltage, and six
totalizing modes. The six totalizing modes include
simultaneous up/down count (TOT A-B) and the ability to
totalize during a preset time after a manual start. The PM
6680B can perform all measuring functions except rise/fall
time, on both A and B inputs and all functions except phase,
rise/fall time and peak voltage on the E input (arming input).

These manuals are available for the above equipment:

Manual Type: Service Manual Fluke-2359-Manual-Page-1-Picture
Pages: 153
Size: 9.76 Mbytes (10231010 Bytes)
Language: english
Revision: Second edition
Manual-ID/Number: 4822 872 20116
Date: June 2003
Quality: Scanned document, all readable.
Upload date:
MD5: 65129655dc5b7ef99db1653d0bb82ce3
Downloads: 1937 since 29 January 2011
Information:
Fluke-2359-Manual-Page-1-Picture


Manual Type: User Manual Fluke-10143-Manual-Page-1-Picture
Pages: 276
Size: 2.56 Mbytes (2688515 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date: 01 January 2000
Quality: Electronic document, no scan, very well readable.
Upload date:
MD5: c8644ab9a721ad4e904f1a7cfe3ec16d
Downloads: 66 since 20 January 2018
Information:
Programming Manual

You should use this ProgrammingManual
 together
 with
 thePM6680B/1/5 Operators Manual.
That manual contains specificationsfor the counter and
explanations of
the possibilities and limitations of the
different measuring functions.
Sections
The chapters in this manual are di-
vided into three sections aimed at dif-
ferent levels of reader knowledge.
The ‘General’ Section, which can be
disregarded by the users who know
the IEEE-488 and SCPI standards:
– Chapter 2 Bus Commands for the
Benchtop User gives bus com-
mands for the front panel keys.
– Chapter 3 Introduction to SCPI
explains syntax data formats, sta-
tus reporting, etc.
The Practical Section of this manualcontains:
– Chapter 4, Programming Exam-
ples, with examples of typical pro-
grams for a wide variety of appli-
cations. These programs are writ-
ten in GW-basic and C.
This Manual
The ‘Programmers Reference’ Sec-
tion of this manual contains:
– Chapter 5, Instrument Model ex-
plains how the instrument looks
from the bus. This instrument is
not quite the same as the one used
from the front panel.
– Chapter 6 Using the Subsystems
explains more about each subsys-
tem.
– Chapter 7, How to Measure Fast
is a set of measuring situations
which the user is often confronted
with when programming a counter.
This chapter also contains infor-
mation about how to use the more
complex subsystem.
– Chapter 8, Error Messages con-
tains a list of all error messages
that can be generated during bus
control.
– Chapter 9, Command Reference,
This chapter gives complete infor-
mation on all commands. The sub-
systems and commands are sorted
alphabetically.
Fluke-10143-Manual-Page-1-Picture


Manual Type: User Manual Fluke-10144-Manual-Page-1-Picture
Pages: 229
Size: 7.68 Mbytes (8058131 Bytes)
Language: english
Revision:
Manual-ID/Number: 4855 872 20079
Date: 01 June 1995
Quality: Scanned document, all readable.
Upload date:
MD5: 61f2deee45450581fb1799261800235a
Downloads: 26 since 20 January 2018
Information:
1	Preparation for Use

Preface....................... 1-2

Safety precautions................... 1-6

Unpacking.................... 1-8

Installation................... 1-10

2	Using the Controls

Basic Controls......................2-2

Input Controls.......................2-4

Measurement Control Keys............2-6

Processing.........................2-8

Display............................2*9

Rear Panel........................2-11

Default Settings {after PRESET)......2-13

3	Input Signal Conditioning

Input Amplifier......................3-2

Trigger Level....................... 3*3

Filter..............................3-5

Impedance.........................3-6

Slope.............................3-6

Attenuation........................3-6

DC / AC Coupling...................3-6

How to Reduce or Ignore Noise and

Interference.......................3*7

Trigger Hysteresis................... 3-8

How to use Trigger Level Setting....... 3-9

4	Measuring Functions

Introduction to this Chapter............4-2

Selecting Function...................4-2

Frequency Measurements	4-3

FREQ A...........................4-3

FREQ C...........................4-3

PER A.............................4-4

RATIO A/B........................4-4

BURST............................4-4

FM Signals.........................4-8

AM Signals........................4-10

Theory of Measurement.............4-11

Time Measurements4-14

TIME A-B.........................4-14

P WIDTH A........................4-15

RISE/FALLA......................4-15

DUTY F A.........................4-15

Measurement Errors................4-16

Totalize,..................... 4-17

Totalize General....................4-17

TOT A-B MAN.....................4-17

TOT A MAN.......................4-18

TOT A~8 During a Preset Time...........4-18

TOT A Start/Stop by B...............4-19

TOT A Gated by B..................4-19

TOT A Gated by B Accumulated During a Presel
Time.......................4-19

Phase .......................4-20

Voltage......................4-28

5	Measurement Control

Measurement Time..................5-2

Gate indicator......................5-3

SINGLE...........................5-3

Display Hold.......................5-3

Arming......................................................5-3
[

Start Arming................................5-4

Stop Arming..............................................5-4

Digit Blanking.......................5-5

More Digits................................................5-5

Controlling Measurement Timing .	5-6

The Measurement Process......................5-6

Measurement Time and Rates................5-6

Resolution as Function of Measurement

Time........................................................5-7

What is Arming?..............................5-9

Arming Setup Time................. 5-13

Arming Examples.................. 5-14

6	Process

Averaging..................................................6-2

Sample Size for Average..........................6-2

Mathematics ...........................................6-3

Statistics...............................6-4

Measuring Speed.......................6-5

Determining Long or Short Time

Instability................................................6-6

Statistics and Mathematics......................6-6

Confidence Limits......................................6-7

Jitter Measurements..................................6-7

7	Auxiliary Functions

Auxiliary Menu............................................7-2

Introduction................................................7-2

Plain English AUX MENU Commands . .	7-4

Burst Frequency ......................................7-5

Address, GPIB..........................................7-5

Protect Memory........................................7-6

Time Interval average Sample Size..........7-6

Timeout......................................................7-6

Program Identity........................................7-6

Statistics Sample Size..............................7-7

Test............................................................7-7

Blank Digits................................................7-7

Arming Start..............................................7-8

Arming Stop..............................................7-8

Analog Output..........................................7-9

AUTO LOW............................................7-11

Auxiliary Codes............... 7-12

Code setting............................................7-12

8	TimeView for PM 6681

Introduction.........................8-2
Software Installation................. 8-3

Hardware Installation................ 8-5

Configuring TimeView................ 8-6

The User Interface..............8-8

The TimeView Screen................ 8-8

View............................. 8-11

Help ............................ 8-14

Help............................ 8-14

Capturing Data............... 8-16

Preparing a Measurement........... 8-16

Setting up the Timer/Counter......... 8-16

Capture.......................... 8-23

Analyzing Data.........................8-28

Statistics......................... 8-28

Fast Fourier Transform ............. 8-30

Smoothing........................ 8-36

Saving and Printing ........... 8-37

File ............................. 8-37

Print ............................ 8-39

9 Performance Check lOPreventive Maintenance

Caiibration........................ 10-2

Other Maintenance................. 10-4

11 Specifications

Measuring Functions................ 11-2

Input Specifications................ 11-5

Output Specifications............... 11-8

Auxiliary Functions................. 11-9

Measurement Uncertainties......... 11-12

LSD Displayed................... 11-17

General Specifications............. 11-18

GPIB Interface.................... 11-19

TimeView........................ 11-20

Timebase Options................. 11-21

Ordering Information............... 11-24

12Appendix

Appendix 1, Error Messages......... 12-2
Fluke-10144-Manual-Page-1-Picture


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