Fluke PM6669 User Manual

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Page 1

Universal Fre que ncy Counter

PM6669

Operators Manual

Page 2

CONTENTS Page: 1

CONTENTS

SAFETY...........................................................................2

Introduction ...................................................................2

PRODUCT PRESENT ATI O N................... .. .. .............. .. ..3

General ................. .............. .. .............. .............. ............3

Rear View......................................................................3

Front View .....................................................................4

INSTALLATION...............................................................5

Unpacking.....................................................................5

Volt age-Range Selection.................... .............. .. ..........5

Grounding........... .............. .. .............. .. .............. ............5

Connecting External Reference....................................6

Installing Options ........... .............................................. .6

Calibrating the MTCXO.................................................6

OPERA T ING INSTRUCTIONS.............. .. ........................8

Using the Frequency Counter.......................................8

Battery Unit .......... .. .............. .. .............. .............. .. ......20

Error Codes..................................... .. .. .. .. .. .. .. ..............20

GPIB-INTERF ACE OPERATION.............................. .. ..21

Introductio n....... .............. .............. .............. .............. ..21

What Can I Do Using the Bus?...................................21

Connecting the Controller ...........................................22

Giving the Count er an Addres s............. .. .... .. .... .. .... .. ..22

Checking the Communication.....................................22

Two Ways of Programming................. .. .............. .. .. ....23

Syntax....... .............. .. .............. .............. .............. .. ......23

Selecting Output Separator.........................................24

How to Select Functio n.................... .............. .. ...........24

Selecting Measuring-Time...........................................24

Selecting Triggering...... .... .. .... .. .... .. .. .... .. .... .. .... .. .... .. .. .25

Totalize Start/Stop .......................................................25

Free-Run/Triggered.....................................................25

Service Request............. .. . . ...................... . . .................26

Status Byte........................... .. .............. .............. .. .......26

Output Mode................................................................27

Bus Learn....................................................................30

Programming Data Out...............................................30

What Happens When I Switch to Local?.....................30

Summary of Bus Commands ......................................31

Programming Examples..............................................32

SPECIFICATIONS .........................................................35

Measuring Functions..... ............ ............ ............ ..........35

Definitions................................ ............ ............ ............36

Input specifications......................................................36

General Information.....................................................37

Auxiliary Func ti ons....................... ...............................38

Optional Accessories...................................................38

Ordering Information ............................... .. .............. ...40

APPENDIX 1............. .. .............. .. .............. .. .............. .....41

Checking the Sensitivity of Counters ..........................41

INDEX ............................................................................43

4822 872 20 021

5/12-April-19 95

PM 6669 - OPERATORS MANUAL

Page 3

Page: 2 SAFETY

SAFETY

Introduction

Read this pa ge carefully before yo u install and use th e PM 6669 Frequ ency Counter.

This Frequency Counter has been designed and tested in accordance with IEC publication 1010-1, and CSA 22.2 No.231, and has been supplied in a safe condition. The user of this instrument must have the required knowledge of PM 6669. Th is knowledge can be gained by thoro ughly studying this manual.

CAUTION: Indicates where incorrect operating pro-

cedures can cause damage to, or destruction of, equipment or other property.

WARNING: Indicates a potential danger that re-

quires correct procedures or practices in order to prevent personal injury.

Safety Precautions

Use generally-accepted safety procedures, in addition to the safety precautions stated in this manual, to ensure personal safety and safe operation of the Frequency Counter.

Caution & Warning Statements

You will find spe ci fi c warn ing and caution statemen ts, where necessary th roughout the manual . Do not carry out repairs or adjustmen ts to the Frequency Counter with ou t reading the Service Manual, which con tains the relevant warnings for such activities.

Symbols

Indicates where the protective ground lead is connected inside the instrument. Never unscrew or loosen this screw.

If in doubt about safety

Whenever you suspect that it is unsafe to use the instrument, you must make it inop erative, clearly mark it to prevent its further operation, an d inform the Fluke service Centre.

E.g.The instrument is likely to be unsafe if it is vis-

ibly damaged.

PM 6669 - OPERATORS MANUAL

Page 4

PRODUCT PRESENT ATIO N Page: 3

PRODUCT PRESENTATION

General

The PM 6669 is a co mpact, high resol ution, reciproca l Frequency Counter whic h p erf orms man y f un ct io ns. A number of options are avail able i.e. HF-input, GPIB-in te rface, high stability oscillator, and rechargeable battery for field use.

A rack-mount kit and a carrying case are also available as accessories.

F G

IEEE 488 INTERFACE

INCLUDED OPTIONS

PM 9604 PM 9605 PM 9607

PM 9608B

EXT REF INPUT

TALK ONLY

16 8 4 2 1

ADDRESS

Rear View

A) Rear feet. B) Screws for removing the cover. C) External-reference-input, BNC connector. D) Voltage-range selector. E) Power-inlet socket. F) GPIB interface-connector (optional). G) GPIB address-selector ( option).

SUPPORTED FUNCTIONS: SH1,AH1 T5,L4 SR1,RL1 DC1,DT1

OFF

VOLTAGE

SELECTOR

Figure 1

Rear View.

10MHz 0.5-15Vrms

B C D

THERMAL FUSE IN

MAINS TRANSFORMER

B A

PM 6669 - OPERATORS MANUAL

Page 5

Page: 4 PRODUCT PRESENTATION

H J K L M

MEASURING TIME

SINGLE 0.2s 1s 10s

FREQAFREQBFREQ

ON STANDBY

PM 6669

RESET LOCAL

TOTALIZE A

START/STOP

UNIVERSAL FREQUENCY COUNTER

DISPL

AUTO

HOLD

FREQ

A/Ao

RPMAPERATOT WIDTH

A-Ao

MEAS

FUNCTION

TIME

TRIGGER LEVEL A

DISPL HOLD

STORE

BLANK DIGITS

EXT REF

TRIGGER

LEVEL A

INPUT A

FILTER<50kHz

SENSITIVITY

MIN

10Hz-160MHz

Ω

30pF

MAX 350Vp

10mVrms 200mVrms

INPUT B

OPTION

70MHz - 1.3GHz

Ω

MAX 12Vrms

P R S T U V

160MHz/1.3GHz

Figure 2

Front View.

Front View

H) Large LCD-display. J) Input-A BNC-connector. K) Sensitivity control with dual-range push-in/pull-out

switch. L) 50 kHz filter switch (Input-A). M) Input-B BNC-connector (optional). N) Power switch. O) Reset but ton, doubl es as Loca l button if the Fre-

quency Counter is equipped with an GPIB inter-

face. Star ts an d st op s cou ntin g if t he TOT A

function is selected.

P) Measuring-time selector-button. * R) Fu ncti on-sele ctor bu tton. * S) Display-hold button. Freezes the display. The but-

ton is also used for storing A

T) Blank digit s button. B lanks out on e digit for each

depression of the button, from the right to the

left of the display. (No rounding off). U) Trigg er leve l settin g button. V) Tilting supp ort. * The sele cted fun ct ion is i nd icat ed o n the d is play. A

short press on the button moves the cursor one

step to the right. A long press makes the cursor

scroll.

PM 6669 - OPERATORS MANUAL

Page 6

10MHz 0.5-15Vrms

EXT REF INPU T

VOLTAGE

SELECTOR

PM 9604

INCLUDED OPTIONS

PM 9605 PM 9607

PM 9608B

IEEE 488 INTERFACE

TALK ONLY

ADDRESS 16 8 4 2 1

OFF

SUPPORTED FUNCTIONS: SH1,AH1 T5,L4 SR1,RL1 DC1,DT1 E2

THERMAL FUSE IN

MAINS TRANSF O RM ER

INSTALLATION Page: 5

INSTALLATION

Unpacking

If the Frequency Counter is cold, leave it in the cardboard box until it has reached normal roo m te mp erature.

– Lift the Frequency Counter out of the box. – Remove the polystyrene supports. – Unpack the Frequency Counter from the plastic bag. – Reverse the procedure to pack.

Check List

Has the Frequency Cou nt er be en damaged in transport? If it has, file a clai m with the carrier immediate ly, and notify the Fluke sa le s & s ervice organizat ion to make repair or replacement of the instrument easier .

– Check that the package contains the following items in

addition to th e Frequ ency Coun ter:

– This Operators’ Manual – A power cable with protective earth conductor – A Battery unit if ordered *) – An MTCXO oscillator if ordered *) – A GPIB interface if ordered *) – An HF-input if ordered *)

*) Labels on the r ear pane l in dicate whic h op tion s

are fitted in your Frequency Counter.

Voltage-Range Selection

Set the Frequency Counter to the local line voltage before connecti ng it. As delivered the Freque ncy Counter may be set to either 115 V or 230 V. The setting is indicated on the voltage range selector on the rear panel.

Figure 4

If the voltage ra ng e se tting is incorrect, set th e se le ct or in accordance with the loca l vo ltage power cable to the line.

Location of Voltage Range Selector.

before connecting the

Figure 3

INCLUDED OPTIONS

PM 9604 PM 9605 PM 9607

Options Labe l on Rear P anel.

PM 9608B

Grounding

The Frequency Counter is connected to ground via a sealed three-core power cable, which must be plugged into a socket outlet with a protective ground terminal. No other grounding is permit ted for this Frequency Counter. Extension cables must always have a protective ground conductor.

PM 6669 - OPERATORS MANUAL

Page 7

Page: 6 INSTALLATION

Removing the Cover

WARNING: Never interrupt the protective ground-

ing intentionally. Any interruption of the protective ground connection inside or outside the instrument, or disconnection of the protective ground terminal is likely to make the instrument dangerous.

WARNING: When you remove the cover you will ex-

Connecting External Reference

If you wish to use an exte rnal 10 MHz reference frequency source, connect it via a BNC-cable to the EXT REF INPUT on the rear panel of the Frequency Counter.

When the Frequency Counter starts measuring, it automatically dete cts the external ref erence and begins to us e it. The EXT REF indicato r on th e di sp lay is switch ed on.

Loosen the two screws using a Pozidrive No. 1 screwdriver

pose live parts and accessible terminals which can be dangerous to life.

Installing Options

Introduction

The options ordered at the same time as the Frequency Counter are normally factory-installed. Other options can be fitted when needed.

The options fit inside the Frequency Counter, but not all at the same time: The HF-i np ut, the high stabilit y-o sc il la tor and either of the GPIB-i nterface or the Battery-uni t ca n be installed in one and the same Frequency Counter.

Calibrating the MTCXO

The MTCXO Time-ba se can easil y be recal ib rat ed to an y 10 MHz reference. To maintain the accuracy of the MTCXO, use a reference with an accuracy of 3*10-8.

The PM 9691 oven-enclosed oscillator used in Fluke counters vers ion /.5. meet this requ irement, if calibrat ed.

Preparations

If you remove the cover when count er ha s been swit ch ed on, the temperature of th e MT CXO will rapi dl y drop ab ou t 10°C. Since the MTCXO must have a stable temperature when calibrated you must wai t an hou r bet ween removing the cover and calibrating.

If the counte r has bee n switched off more tha n th ree hours, you can calibreate it directly .

Figure 5

– Make sure that the power cable is disconnected.

WARNING: Although the power switch is in the off

– Loosen the two screws in the rear feet. – Grip around the front panel and pull the Frequency

Counter out of the cover.

Loosen These Screws to Remove Cover.

position, the line voltage is present on the printed circuit board.

Calibration Procedure

– Remove the cover from the counter. – Allow the MTCXO to adapt the new ambient tempera-

ture. (See ’Preparations’.)

– Connect the 10 MHz reference to Input-A. – Switch ON the coun ter. – Adjust the sensitivity control so that the counter counts

properly.

– Hold down the CALIB-bu tt on, o n the main prin te d-circ uit

board in the counter, and press the Reset-button.

PM 6669 - OPERATORS MANUAL

Page 8

INSTALLATION Page: 7

CALIB-button

– Wait about 20 seconds, until the display shows

10.0000000 MHz. Now the oscillator is calibrated.

– Switch OFF the counte r a nd d isconn ect the 10 MHz ref-

erence.

Fit the cove r.

Figure 6

Location of the CALIB-Button.

PM 6669 - OPERATORS MANUAL

Page 9

Page: 8 OPERATING INSTRUCTIONS

OPERATING INSTRUCTIONS

Using the Frequency Counter

CONTROL OPERATING THE

CONTROL

ON STAND-BY

FUNCT ION

POWER, a two-position mechanical push-button. Pressed = ON, Released = OFF

A short depression of the FUNCTION key moves the cursor in the lower edge of the display one step to the right. If the k ey is hel d depressed, the cursor will scr oll t o th e rig ht until re leas ed. When t he cursor reaches the rightmos t po sition it jumps back to the leftmost po sition and continues from there.

Move func tion cur sor to FREQ A

DISPLAY GPIB-CODE

AUTO

PER

AUTO

PER

AUTO

TRIGGER LEVEL A

WIDTH

TOT

TRIGGER LEVEL A

WIDTH

TOT

TRIGGER LEVEL A

EXT REF

kHz ums GATE

EXT

REF

kHz

No control possible but D gives the same settings as after power-ON.

One code for each func tion,

- see below:

FREQ A

FREQ

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

FREQ

A/A

FREQ

RPM

A-A

FUNCTION

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

RPM

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

PM 6669 - OPERATORS MANUAL

FREQ

A/A

RPM

A-A

FUNCTION

PER

TOT

WIDTH A

EXT

REF

Page 10

OPERATING INSTRUCTIONS Page: 9

FUNCTION AND RANGE HINTS AND COMMENTS

Switches the power ON and OFF. When switched on, the built in microprocessor switches on all segments of the display then it runs a power-up test, checking the measuring-logic of the Frequency Counter before the counter starts working. This test takes about 2 seconds.

If an error is found, an error code will be displayed. Try switching the Frequency Counter off and on again. If error code 01 - 03 persists, call Fluke service. Look on the last page in this manual for Phone No. and addre ss.

Selects one of the nine measuring functions available. The cursor does not stop at FREQ C if no Input-C HF-

WARNING:The power switch operates on the secondary side of the transformer. The power cable must be di scon nect ed fr om t he lin e ou tlet s ocke t if i t is necessar y to compl etely isol ate the Fr equency Counter from the line.

Error 01 = RAM memory error Error 02 = Measuring logic error Error 03 = Internal bus error Error OF = Overflow in the counting registers

input is installed.

Reciprocal frequency measurement of the signal at Input-A.

Range:

0.1 Hz to 16 MHz (SINGLE measuring-time) 1 Hz to 160 MHz (0.2, 1, and 10 s measuring-time)

If the signal is sine shaped and the input AC coupled, the minimum input frequency is 20 Hz (at specified sensitiv ity) .

PM 6669 - OPERATORS MANUAL

Page 11

Page: 10 OPERATING INSTRUCTIONS

CONTROL OPERATING THE

CONTROL

Move func tion cur sor to

FUNCT ION

FREQ B

Move func tion cur sor to

FREQ A/A

Move func tion cur sor to

FREQ A-A

DISPLAY GPIB-CODE

AUTO

TRIGGER LEVEL A

FREQ B

kHz

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

AUTO

TRIGGER LEVEL A

TOT

PER

RPM

WIDTH A

EXT

REF

Not bus

FREQ

selectable

FREQ

A/A

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

AUTO

TRIGGER LEVEL A

TOT

PER

RPM

WIDTH A

EXT

REF

Not bus

FREQ

selectable

FREQ

A/A

A-A

FUNCTION

TOT

PER

RPM

WIDTH A

EXT

REF

FUNCT ION

Move func tion cur sor to

RPM A

Move func tion cur sor to

PER A

Move func tion cur sor to

TOT A

FREQ

AUTO

TRIGGER LEVEL A

RPM A

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

PER

AUTO

TOT

TRIGGER LEVEL A

WIDTH A

EXT

REF

PER A

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

PER

AUTO

TOT

TRIGGER LEVEL A

WIDTH A

EXT

REF

TOTM A

FREQ

A/A

RPM

A-A

FUNCTION

PER

TOT

WIDTH A

EXT

REF

PM 6669 - OPERATORS MANUAL

Page 12

OPERATING INSTRUCTIONS Page: 11

FUNCTION AND RANGE HINTS AND COMMENTS

Reciprocal frequency measurement of the signal at Input-B.

Range:

70 to 1300 MHz (PM 9608B)

The counter divide s the fre quency o n Input-A by a constant, A

, that is stor ed in the co unter in th e follow -

ing way:

1) Connect a signal with the frequency to be stored to Input-A .

as A

2) Select FREQ A.

3) Depress the DISPL HOLD key and hold it de-

pressed until the DISPL HOLD indicator is switched off again. Now A

4) Select FREQ A/A

is stored.

5) Connect the frequency to be measured to Input-A.

The counter substr acts a co nstant, A0, from the frequency at Input-A. You can read about how to store A0 in the description for FREQ A/A0.

The cursor does not stop at FREQ B if no Input-B HFinput is installed.

If you select this function without storing A0, Frequency A will be displayed.

This function is convenient when an oscillator is to be tuned to the frequency of a reference oscillator. It is much easier to adjust until the display shows

1.0000000 than 7.122 3678 .

If you select this function without storing A0, Frequency A will be displayed.

This functio n can e.g. be us ed in a rad io to displa y the received frequency; Set the intermediate frequency as the cons tant A

. Select FREQ A-A0 and

measure the frequency of the local oscillator, and the display wil l show th e recei ved frequ ency.

The frequency on Input-A is multiplied by 60 and displayed as Revolutions Per Minute.

Range:

6 RPM to 720 000 000 RPM.

When you select SINGLE, the Frequency Counter measures one period, the range is: 100 ns to 200 000 000 s (about 6 years and four months!). When you select 0.2, 1, and 10 s Measuring-time, the Frequenc y Counter di vide s the inpu t frequen cy by 10 and measures the average period for the No. of cycles in that time.

Range:

8 ns to 1 s. The Frequency Counter counts the total number of

pulses fed to Input-A. You start and stop the totalizing with the TOTALIZE START/STOP key (RESET/LOCAL). If you keep this key depressed for more than one second, the total sum will be reset.

Range:

0 to 1*1015 pulses

Use SINGLE when the input frequency is low. This shortens th e measur ing time consid erably s ince on e cycle is measured instead of 10.

k on the display indicates kilo-pulses (1000) and M in- dicates Me ga-puls es(1 00 0 000).

The Measuring-time indicator is switched off in TOT A MAN.

PM 6669 - OPERATORS MANUAL

Page 13

Page: 12 OPERATING INSTRUCTIONS

CONTROL OPERATING THE

CONTROL

Move func tion cur sor to

FUNCT ION

MEAS

TIME

MEAS

TIME

WIDTH A

MEAS TIME is operated

in the same way as the func-tions control, see page 8.

Move the measuringtime cursor to SINGLE

DISPLAY GPIB-CODE

AUTO

TRIGGER LEVEL A

WIDTH A or PWIDTH A

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

AUTO

TRIGGER LEVEL A

TOT

PER

RPM

WIDTH A

kHz

EXT REF

MTIME <num>

where <num> is the time in seconds.

Range:

10 ms to 10 s. 0 = Single

MTIME 0

MEAS

TIME

MEAS

TIME

MEAS

TIME

Move the measuringtime cursor to 0.2 s

Move the measuringtime cursor to 1 s

Move the measuring time cursor to 10 s

FREQ

A/A

FREQ

A/A

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FREQ

A-A

10s1s0.2sSINGLE

FREQ

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

FUNCTION

DISPLMEASURING TIME HOLD

FUNCTION

DISPLMEASURING TIME HOLD

RPM

PER

AUTO

PER

AUTO

PER

AUTO

TOT

TRIGGER LEVEL A

TOT

TRIGGER LEVEL A

TOT

TRIGGER LEVEL A

WIDTH A

kHz

EXT REF

MTIME 0.2

MTIME 1

MTIME 10

FREQ

PM 6669 - OPERATORS MANUAL

FREQ

A/A

RPM

A-A

FUNCTION

PER

TOT

WIDTH A

EXT REF

FREQ

Page 14

OPERATING INSTRUCTIONS Page: 13

FUNCTION AND RANGE HINTS AND COMMENTS

The counter measures the positive pulse width of the signal on Input-A. Range: 100 ns to 200 000 000 s.

The set Measuring-time controls the time during which the main gate is opened, allowing pulses to enter the coun ting log ic. A lon ger Measu ring-t ime give s higher r eso luti on re adou ts wi th m ore d igit s di spla yed.

The time the gate is open is no t exactl y the pre set Measuring-time, because the Frequency Counter synchronizes the measurement with the input signal in order to measure complete periods. If the period of the input signal is longer than the set Measuring-time, the main gate doe s not clos e again unti l the per iod is completed.

For PER A and WIDTH exactly one period or one time interval is measured. The minimum result possible is 100 ns.

The display time will be 100 ms. When set to SINGLE, FREQ A and, RPM A, the

Measurin g-tim e is one c ycle of the in put sign al or 3 ms, whichever is longest. When set to SINGLE and FREQ B, the Measuring-time is 3 ms.

If you are interested in the negative pulse width instead; f irst meas ure t he p eriod and mak e a no te of the result, then measure the pulse width and substract it from the period reading.

If you wish to do one measurement instead of repetitive measurements, see DISPL HOLD.

The input frequency is limited to 16 MHz for FREQ A, PER A, and RPM A.

If external referen ce is used , the EXT RE F indica tor will not be switched-on until after the first measurement.

A Frequency-A measurement will result in 6-7 digits on the displa y.

A Frequency-A measurement will result in 7-8 digits on the displa y.

A Frequency-A measurement will result in 8-9 digits on the displa y.

PM 6669 - OPERATORS MANUAL

Page 15

Page: 14 OPERATING INSTRUCTIONS

CONTROL OPERATING THE

CONTROL

The TRIGGER

TRIGGER

LEVEL A

TRIGGER

LEVEL A

TRIGGER

LEVEL A

LEVEL A control is

operated in the same way as the functions control, see page 8.

Move Trigg er Leve l A cursor to AUTO.

Move Trigg er Leve l A cursor to

DISPLAY GPIB-CODE

One code for each trigger level offset. See below.

AUTO

TRIGGER LEVEL A

TLO AUT

kHz

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

AUTO

TRIGGER LEVEL A

TOT

PER

RPM

WIDTH A

kHz

EXT REF

TLO POS

TRIGGER

LEVEL A

TRIGGER

LEVEL A

BLANK DIGITS

Move Trigg er Leve l A cursor to

Each depression of the BLANK DIGITS key blanks out on e digit starting from the right (Least Sig-nificant Digit). When all digi ts are blanked out, the next depression removes the blanking.

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

PER

AUTO

TOT

TRIGGER LEVEL A

WIDTH A

kHz

EXT REF

TLO SYM

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FUNCTION

DISPLMEASURING TIME HOLD

PER

AUTO

TOT

TRIGGER LEVEL A

WIDTH A

kHz

EXT REF

TLO NEG

FREQ

A/A

FREQ

A/A

RPM

A-A

10s1s0.2sSINGLE

FREQ

A-A

FUNCTION

DISPLMEASURING TIME HOLD

FUNCTION

RPM

PER

AUTO

PER

TOT

TRIGGER LEVEL A

TOT

WIDTH A

kHz

EXT REF

Not bus controll able

PM 6669 - OPERATORS MANUAL

Page 16

OPERATING INSTRUCTIONS Page: 15

FUNCTION AND RANGE HINTS AND COMMENTS

The normal trigger level of the AC-coupled Input-A is 0 V. This is ideal for symmetrical signals like sinewaves, since their average DC component is 50 % of Vp-p. Non-symmetrical signals however, might fail to trigger if the trigger level is 0 V. Therefore there are three trigger l evel set tings avai labl e; o ne for smal l du ty fac tors, one for symmetrical wave forms and one for large duty factors.

When set to Auto the counter first tries the trigger level for symmetrical signals. If that does not work, it tries the ot her setti ngs.

Auto does not work if TOT A is selected.

Range: Auto works with input frequencies from 100 Hz and up.

Use this setti ng if the du ty factor is below 25 %. A positive offset vo ltage is added to th e trigger level.

It is often poss ible f or the coun ter to tri gger on unsymmetrical signals even though the symmetrical triggering is sele cted, pro vided th at the sen sitivi ty is high enough. This however, gives poor noise immunity.

If you don’t know the duty factor of the input signal, select Auto. If that does not work (too low input frequency) do as follows;

a) Set the se nsitiv ity to max . b) Select Trigger level .

c) Reduce the sensitivity until the gate indicator stops

blinking.

d) Check if trigger level or makes the gate

indicator start blinking again. If it does, leave the trigger level in that position, otherwise return to trigger

level .

e) Turn the sensitivity down until the gate indicator

stops blinking, then up slightly until it starts again. The trigger level is now correct.

Use this setti ng if the du ty factor is between 2 5 % and 75 %. The trigger level is 0 V.

Use this setti ng if the du ty factor is below 75 %. A negative offset vo ltage is added to th e trigger level.

Each digit that is blanked out is removed and replaced by a -. The numerical value on the display is not rounded off. The blanking is cleared by reset, changing settings or when all digits are blanked and you press the BLANK DIGITS key once more.

This function is used to blank the display of irritating, unstable d igit s.

PM 6669 - OPERATORS MANUAL

Page 17

Page: 16 OPERATING INSTRUCTIONS

CONTROL OPERATING THE

CONTROL

RESET

LOCAL

TOTALIZE A

START/STOP

DISPL

HOLD

STORE

INPUT A

10Hz-160MHz

Ω

30pF

MAX 350Vp

RESET/LOCAL, a short

press is enough for Reset. When the remote indicator is on, a press will cause the counter to switch back to LOCAL, i.e. control from the front panel.

TOTALIZE START/STOP, one

press star ts tota lizing , the next press stops.

Switches ’on’ or ’off’ DISPL HOLD when depressed.

Connect th e signal to INPUT-A via a BNCcable.

DISPLAY GPIB-CODE

X starts a new measurement.

GATE OPEN

starts and

GATE CLOSE

stops Totalize MAN.

AUTO

PER

TRIGGER LEVEL A

WIDTH

TOT

kHz

M ums GATE

EXT REF

Not bus controllable, but Free-run OFF will give a similar fu ncti on; See GPIB-bus operation.

FREQ

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

FREQ

A/A

RPM

A-A

FUNCTION

INPUT B

OPTION

70MHz - 1.3GHz

Connect th e signal to INPUT-B via a BNCcable.

Ω

MAX 12Vrms

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Page 18

OPERATING INSTRUCTIONS Page: 17

FUNCTION AND RANGE HINTS AND COMMENTS

When reset is depress ed, the di splay an d coun ting registers are clea red. When reset is releas ed, a new measurement is started. The Measuring-time-, Functionand d ispl ay hol d- s ettin gs a re no t affe cted .

If the TOT A function is selected, the RESET/LOCAL key functions as a START/STOP key. One press starts the counting an d the next press st ops it. A long depressi on re sult s in rese t.

Display hold f ree zes th e di spla y, b ut not until the measurement in process has been finished. A new measurement can always be initiated via the RESET key. Store A tions FREQ A/A described under FUNCTIONS, FREQ A/A

is used to stor e the cons tant use d in func-

and FREQ A-A0. The procedure is

Use this input for all functions except FREQ B. Range: 10 Hz to 160 MHz

Impedance: 1 M //30 pF Min. pulse du ration:4 ns

When the counter is controlled from the GPIB-Bus, the LOCAL key can be disabled via the ’Local Lock out’ command.

At higher fre quencies ; use a 50 Ω termination type PM 9585 to avoid interference caused by impedance mis match. The illustr ation belo w shows whi ch functio n block each of the inpu t contr ols affe ct.

Sensitivity

60 mV

40 mV 20 mV

0 30 MHz 120 MHz 160 MHz

AC Spec. Typically DC Spec.

Max voltage

350 V

DC+AC

peak

8 V

RMS

0 440 Hz 1 MHz 120 MHz

This is the HF-input which must be used when the FREQ-B function is selected. If the Frequency Counter does not include the Input-B option, the BNCconnector is replaced by a plastic plug.

Range:

70 to 1300 MHz.

Impedance:

50Ω

Sensitivity:

10 mV

15 mV

up to 900 MHz,

RMS

900-1100 MHz

RMS

and 40 mVRMS a bove. Max voltage: 12 V

RMS

Trigger level offset

Attenuator

Input-A

Sensitivity range switch

Figure 7.

Input circuit block diagram.

Filter

Counting

logic

Sensitivity control

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Page: 18 OPERATING INSTRUCTIONS

CONTROL OPERATING THE

CONTROL

INPUT A

SENSITIVITY

MIN

10mVrms 200mVrms

INPUT A

FILTER<50kHz

Pull the SENSITIVITY knob to switch to AC coupling. Depress the knob to switch to DC coupling. NOTE: The potentiometer controls the sensitivity when ACcoupled and Trigger Level when DC-coupled. Turn the knob clockwise to increas e and coun ter clockwise to decrease the trigger level or sensitivity.

One two-position switch. Depress to switch on the FILTER and relase to switch it off.

DISPLAY GPIB-CODE

Not adjust able from the bus.

Not bus controll able .

EXT REF INPUT

0MHz 0.5-15Vrm

Connect an external 10 MHz frequency source to the BNCconnector on the rear panel of the Frequency Counter marked EXT

REF INPUT.

FREQ

AUTO

TRIGGER LEVEL A

Not bus

DISPLMEASURING TIME HOLD

10s1s0.2sSINGLE

controll able .

kHz

GATE

FREQ

A/A

RPM

A-A

FUNCTION

PER

TOT

WIDTH A

EXT REF

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OPERATING INSTRUCTIONS Page: 19

FUNCTION AND RANGE HINTS AND COMMENTS

For frequency-, period-, and ratio measurements: Select AC coupling and set the sensitivity so that the

hysteresis band of the Frequency Counter is about half the ampl itude of the signal.

For time measurements: Select DC coup ling and set t he t rigge r lev el t o the de-

sired leve l using th e 1 V/div istion s cale on th e front panel.

The filter works on Input-A where it suppresses signals with higher frequencies than 50 kHz.

Filter suppression:

40 dB at 1 M Hz

The Frequency Counter automatically detects if a suitable signal is connected to the EXT- REF Input-connector.

Suitable signal:

10 ± 0.1 MHz, 0.5 to 15 V

Sine wave.

RMS

1. S et the se nsitiv ity knob fully cou nter cl ockwise .

2. T urn it unti l the input tr iggers .

3. Continue turning to the 20 mV

position, or to the

RMS

position w here the di splay tu rns uns table du e to noise.

4. S et the kn ob to the po sition i nbetwee n these two points.

You will have a stable reading.

If the sensitivity is too high, the Frequency Counter will be trigge red by nois e and inte rferen ce instead of by the signal.

The filter ca n also be us ed to supp ress H Finterferen ce on sign als wit h higher fr equen cies tha n 50 kHz, b ut the n the sens itiv ity of the inp ut wi ll b e reduced.

NOTE: Nev er use th e filter when meas uring TIME A-B

since the filter delays the signal on Input-A.

Use external reference when the measurement requires ult ra-h igh s tab ilit y.

The Frequ ency C ounte r mu st st ill have the i nter nal time base even if an external reference frequency is used.

If single is selected, the EXT REF indicator on the display is not swit ched o n unti l af ter t he fir st measurement.

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Page: 20

Battery Unit

Operation

When a battery unit is installed, the counter can operate for 3 hours wi thout mains supp ly. The display st arts blinking shortly be fore the battery is disc harged.

The counter charges the battery automatically when connected to the mains, no mat te r how th e Power-switch is set. Charging a discharged battery to 75 % of full capacity will take 7 hours, and to full capacity, 24 hours.

If the coun te r i s co nnected to the mai ns and switched on, it will not switch to battery operation if you disconnect the mains. You must first switch the coun te r O F F with the power switch, then ON again before the battery unit supplies the counter.

Battery Care

The capacity of the rechargeable battery degrades if the counter is not powered by the battery frequently. To keep the battery from degrading, cycle the batte ry, from fully charged to fully discharged, occasionally.

The capacity of a degraded battery can be restored by cycling the bat te ry a number of times, but a restored battery will never reach the capacity of a new one.

Error Codes

The counter can disp la y th e fo ll owing error codes if something goes wrong.

Error OF Overflow in the counting registers.

Select a shorter Measuring-time if you get this error code, unless the counter is set to TOTALIZ E, then you must press reset and start again from zero.

Error 01 RAM memory error Error 02 Measuring logic error Error 03 Internal bus error

If the counter sho ws on e of these error codes, try switching the counter off and on again. If erro r code 01-03 persists, call Fluke service. Look on the last page in this manual for Phone No. and address.

If you must store your counte r for so me time wit ho ut using it, store it in a cool and dry place. Leave the counter with the mains cable connected if possible. If not, don’t disconnect the mains cable until the battery is fully charged, then charge the battery for at least 8 hours every 3 months .

CAUTION: Prolonged storage or use of the counter

at temperatures above +40°C shortens the life of the battery.

The battery will freeze if it is not sufficiently charged when stored at a low temperature. 75% charge is sufficient for -40°C.

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GPIB-INTERFACE OPERATION Page: 21

GPIB-INTERFACE OPERATION

Introduction

The PM 6669 can be controlled by a computer (controller) via the GPIB-interface o pt ion, P M 960 4. All functions that can be controlled from the front panel can also be controlled via th e bus in a similar way, except select io n of measuring functions FREQ A/A filter, the sensitivity cont rols, and the power switch. T he additional micro-processor on the interface board has made it poss ible to add func tions. You can obtain continuousl y va riable Measuring -time, bus-learn, h ig hspeed-dump etc., bu t th es e fu nc ti on s are onl y ac ce ssible via the bu s.

To select a function, you send a command to the counter. We have chosen the text on the front panel as commands, wherever possible, in order to make them easy to remember. E.g. the command to select Frequency-B is FREQ B and the command to select Period A is PER A.

NOTE: The characters in a command can be in both up-

per and lower case.

, and FREQ A-A0, the

What Can I Do Using the Bus?

All the capabilities of the interface for the PM 6669 are explained below. If you want a complete description of all GPIB-interface functions, read the ’Fl uke In strumentation-Systems Reference-Manual’.

Summary

Description Code

Source ha ndshak e SH 1 Acceptor handsh ake AH1 Control function CØ Talker Function T5 Listener function L4 Service request SR1

Description Code

Remote/local function RL1 Parallel poll PPØ Device c lear func tion DC1 Device trigger function DT1 Bus drivers E2

Source and Acceptor Handshake SH1, AH1

SH1 and AH1 simply means th at the counter can exchange data with other instruments or a controller, using the bus handshake lines; DAV, NRFD, NADC.

Control Function, CØ

The counte r does not function as a co ntroller .

Talker Function, T5

The counter can send responses and the results of its measurements to other devices or to the controller. T5 means that it has the following functions:

– Basic talk er. – Talk only mode. – It can send out a status byte as response to a serial

poll from the controller.

– Automatic un-addressing as talker when it is addressed

as a listener.

Listener Function, L4

The counter c an receive programming in st ructions from the controller. L4 means the following functions:

– Basic list ener. – No listen only. – Automatic un-addressing as listener when addressed

as a talker.

Service Request, SR1

The counter can call for attention from the contro ll er e. g. when a measurement is completed and a result is available.

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Page: 22 GPIB-INTERFACE OPERATION

Remote/Local, RL1

You can control the counter manually (locally) from the front panel, or remotely from the controller. The LLO, local-lock-out functi on , ca n disa bl e the LOCAL button on the front panel.

Parallel Poll, PPØ

The counter does not have any parallel poll facility.

Device Clear, DC1

The controller can reset the counter, forcing it to default settings, via int erf ac e me ss ag e DCL (Device clear) or SDC (Selective Device Clear).

Device Trigger, DT1

You can start a new measurement from the controller via interface message GET (Group Execute Trigger).

Bus Drivers, E2

The GPIB interface has tri-state bus drivers.

Connecting the Controller

The bus interface connector is on the rear panel of the counter. If your counter does not have any connector, you must install the GPIB-interf ace op tion .

Address

Switch settings

Address

Switch settings

Address

Switch settings

0 00000 10* 01010 20 10100 1 00001 11 01011 21 10101 2 00010 12 01100 22 10110 3 00011 13 01101 23 10111 4 00100 14 01110 24 11000 5 00101 15 01111 25 11001 6 00110 16 10000 26 11010 7 00111 17 10001 27 11011 8 01000 18 10010 28 11100 9 01001 19 10011 29 11101

30 11110

* Factory setting.

NOTE: 31 is the bus command for "Untalk" and should

not be used. If 31 is selected the counter will work as if address 0 is selected.

Talk-Only

The leftmost switc h in the add ress switch block is the T ALK ONLY switch. If you set it to ’1’, the counter will output measurement results on the bus continuously. It will not react to any incoming commands.

GPIB connector Address switch

OFF

VOLTAGE

SELECTOR

SUPPORTED FUNCTIONS: SH1,AH1 T5,L4 SR1,RL1 DC1,DT1 E2

THERMAL FUSE IN

MAINS TRANSFORMER

INCLUDED OPTIONS

Figure 8

PM 9604 PM 9605 PM 9607

IEEE 488 INTERFACE

PM 9608B

TALK ONLY

EXT REF INPUT

10MHz 0.5-15Vrms

ADDRESS 16 8 4 2 1

GPIB conn ecto r a nd add res s sw itch, the numbers above the switches indicate the significanc e of each swi tch.

Connect the cont rol le r via an IEEE-4 88 cable to the bus connector. If you use IEC-625 cables, an adapter is available, see ord eri ng information at the end of th is manual.

Giving the Counter an Address

The counter must have a unique address so that the controller ca n communicate with it . Th e a ddress is selected by setting switches to the binary equivalent of the address you want. The switches are located to the right of the interface connector. The OFF position means 0 and the ON position means 1.

This setting may only be used if the counter is connected to a ’Listen only’ device such as a printer. Set the switch to ’0’ when yo u w ant normal bus comm u nication.

Talk only is set to ’0’ on delivery . The counter is now ready for bus control.

Checking the Communication

To check if the counter and the controller can communicate, address the counter and execute the following sequence: (The programming example is for an HP-85 controller.)

Type on Controller: This Should Happen.

REMOTE 710 The remote indicator should

be switched on.

OUTPUT 710;"ID?" Ask for the counter identity. ENTER 71 0;A$ Input result from counter. DISP A$ The response on the

display of the controller is the identity of the counter.

If everything is OK, the counter will identify itself as: PM6669/YZW/MN

where: Y = 4 if the counter has an HF-input, oth erwi se 0. Z = 3 for MTCXO, otherwise 1 W = 6 (GPIB-bus is installed) M = Revision No. of counte r firmware N = Revision No. of GPIB-bus firmware

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GPIB-INTERFACE OPERATION Page: 23

Two Ways of Programming

The simplest way of programming the counter is by manually setting up the measurement you want from the front panel of the counter, then let the controller ask the counter how it is se t up. The data the con troller gets from the counter can be used to set up the same measurement over and over again. This method is called ’Buslearn’ and will be explained later.

The other method is to make a prog ram messa ge where each step of the set-up is separately specified.

Programming Check-List

Check that the following steps have been taken to ensure correct programmin g of the instrument.

Normally only the six first steps must be programmed.

– Do you know the current setting of the counter? If not,

send device clear ’D’ to get the default settings.

– Select Measuring-function;

(Default: Frequency-A.)

– Select Measuring-time;

(Default: 0.2 s.)

– Select Trigger-level offset;

(Default: Positive)

For advanced programming, check the following steps.

– Select Trigger-slopes;

(Default: AUTO)

– Set Output separator;

(Default: LF.)

– Set EOI mode;

(Default: OFF.)

– Set service request(SRQ) -mask;

(Default, No SRQ.)

– Select Free-Run on or off;

(Default: ON.)

– If Free-Run is off, select Time-Out if desired;

(Default: Infinite, programmed as 0 s.)

– Set Output-mode;

(Default: Normal output format, High-speed dump OFF

and MTCXO compensation ON.) All functions and commands in the checklist will be explained la ter.

Syntax

What is a Programming Command?

A programming command consists of a header, addressing the func ti on you want, and a body instructing th e function what to do.

EXAMPLE:

TRGSLP

HEADER, addressing Trigger Slope

NOTE: Some programming commands consists only of

the Header, e.g. trigger com mand ’X ’.

What is a Programming Message?

A programming message is a number of programming commands with separators between them. E.g. the commands necessary to set up a measuremen t.

EXAMPLE: PER A;M TIM E 0

Input Separator

All communication between the counter and the controller uses sequences of ASCI I-c ha racters terminated by a separator. Input separators are the separators sen t by the controller. They are used in four different places:

Between header and body

The separators in th e ex ampl e ab ov e are the ones normally used in respective place. The counter will however accept any one in any place.

The following separators will also work in any of the four places: colon, CR, ETB, ETX, the sep ara tor selected as output separator, as well as an active EOI-signal.

As unit separator between bodies

FREQ A,B:FRUN ON↵

POS

BODY, switching slope to positi ve

Between Program commands

To end a program message

NOTE: You only have to program the changes from the

previous set-up.

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Page: 24 GPIB-INTERFACE OPERATION

Order of Commands in a Program Message

Normally, the programming commands in a programming message can be placed in any order.

However, the following commands must always be placed at the end of a program message since any command sent after them will disable the selection:

INPA? MEAC? FNC? X BUS? ID? OUTM 4

These commands will be ignored if found anywhere but in the end of a message.

In some program commands, the body is replaced by the term <number> or <num> . Here you must en ter a numerical value. <numb er> can be en te red in any format you like e.g. 1.23 can also be entered as

0.000000123 digits than the counter needs, your entry will be truncated. The counter will stop if an entry is out of the counters range. To proceed, the status mes sa ge ’Programming error’ must be reset , se e ’Status byte’.

107 or 1230000∗10-6. If you enter more

∗

Selecting Output Separator

Output separators terminate messages from the counter to the controller. The separator needed is different for dif ferent controllers; see the Operators’ Manual for your controller.

At power on, the output separator of the counter is linefeed ’LF’ (10

The output separator can be changed by sending SPR <number> to the counter. <number> is the decimal value of the ISO (ASCII)-code for th e de si red sep ara to r. It can be 0-26, 28-31, ESC code, 27, is not accepted.

Only one <number> can be entered as separator. If you want the combination of CR+L F (13 lected by ’SPR 255’.

EXAMPLE:

SPR 13 changes the output separator to CR SPR 255 changes the output separator to CR+LF The counter can signal EOI together with the last output

separator in responses and output data. EOI ON switches on the function. EOI OFF switches it off. Default setting is EOI OFF. The selected separat or and EOI will not be altered by

LOCAL from the front panel nor by LOCAL or ’Device clear’ from the bus.

decimal

dec

+ 10

), it is se-

dec

How to Select Function

Standard Functions

Functions are selected by sending the appropriate function command to the counter, e.g. FREQ A. The space between FREQ and A indicates the input separator t hat you always must insert.

Function Command Comment

Frequency A FREQ A Default Frequency

B* Frequency A/A0— Make a FREQ A

Frequency A-A0— Make a FREQ A

RPM A RPM A Period A PER A Totalize A

Manually TOTM A See ’Totaliz e start/s top’. Pulse-width A WIDTH A The counter will also accept

The function cursor on the display of the counter will jump to the selected fu nc ti on.

Only possible if Input-B option, PM 9608B is installed.

FREQ B

measurement and then perform the r atio calc ulat ion in the controller.

measurement and then calculate the frequency difference in the controller.

PWIDTH A.

Selecting Measuring-Time

The Measuring-time can be set to any valu e be twe en 10 ms and 10 s, or SINGLE-measuring. Any value below 10 ms will be interpreted as SINGLE. Values above 10 s will be out of range and cau se an e rror. The program command is MTIME <number>. Al ways enter the Measuring-time in seconds. The entered value will be trunkated to the nearest 10 ms increment.

Meas Time.

0.2 s MTIME 0.2 Default 10 m s MTI ME 0 .0 1 You will not be able to see the

7.34567 s MTIME 7.34567 The Measuring-time will be

2 ms MTIME 0.002 Out of range. Measuring

SINGLE MTIME 0 A display time of 50 ms is

25 s MTIME 25.0 Out of range and error, the

Command Comment

gate indicator blinking if the Measuring-time is below 50 ms

7.34 s.

time will be SINGLE.

set so that you can see the Gate-indicator.

counter wil l stop. It can indicate programming error by sending an SRQ if selected in the SRQ-mask.

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GPIB-INTERFACE OPERATION Page: 25

The Measuring-time cursor on the display will indicate

0.2 s for all programmed Measuring-times except SINGLE, which will be indicated as usual.

Selecting Tr iggering

The trigger level can be sel ec te d in the same way as from the front panel.

Trigger-level offset Code Comment

Auto TLO AUT Default

TLO POS TLO SYM TLO NEG

The trigger-level cursor on the front panel willindicate the setting.

Trigger slope Command Comment

Positive TRGSLP POS Default Negative TRGSLP NEG Negative slope is only

availabl e via the bu s and is used when yo u want to measur e the negative Pulse-width.

When the counter switches to local, the trigger slope will switch back to positive. Trigger slope is not indicated on the displa y.

Totalize Start/Stop

When TOT A is selected, the gate is opened and closed by the controller instead of by press ing the button on th e front panel. To start the counting after selecting T OTM A, the gate must be opened.

T otalize Command Comment

Start GATE OPEN Starts counting. Stop GATE CLOSE Stops counting.

Default.

NOTE: Multiple GATE OPEN/GATE CLOSE will accu-

mulate the results in the counting registers. Any other command but GATE OPEN/GATE CLOSE will stop the totalizing and reset the counting registers to zero.

Free-Run/Triggered

The counter can work in two different ways:

1. Free-Run, where it starts a new measurement as soon as the previous measurement is finished. The first measuring result that is ready after the counter receives a read command, will be sent to the controller. When the result has been read, the output buffer is r eset to z ero u ntil a new result is ready. One and the same measuring result can only be read once.

2. Triggered, where the counter waits for trigger com- mand GET or ’X’ from the controller before it starts a measurement. When the measurement is completed, the counter will wait until the controller reads the measuring results, then the output buffer is reset. The function is the same as when Displ Hold is selected from the front panel and you start a new measurement by pressing the reset button.

Free-Run Command Comment

Off FRUN OFF This function is sometimes

called Triggered-Mode, so the TRIG ON command will also result in the same func tion.

On FRUN ON TRIG OFF gives the same

result. Default.

Free-Run ON or OFF will not be indicated on the display. When the counter switch es to LOCAL , Fre e-Ru n will always be ON but when the counte r switches back to remote, it will return to its previous ly prog rammed settings.

Time-Out

When Free-Run is swi tc he d off it is possible to set a time-limit (time-out) between the start of a measurement and the time wh en a result is expected to be ready. If no result is achieved before the set time is out, the counter can output a Service Request, SRQ. Time-Out must be selected in the SRQ-mask; see ’Servi c e Request’. The programming command is TOUT <number>. The timeout can be set to any value between 100 ms and 25.5 s, the minimum increment is 100 ms.

Time-Out Command Comment

100 ms TOUT 0.1 Time-Out is only intended to

be used with Free-Run off*.

Off TOUT 0 Always send this command

when Free-Run is switched on. Default.

Time-Out is not in di ca ted on the display. When the counter switches to LOCAL, Time-Out is off, but wh en switched to remote aga in , the set Time-Out will be active again.

* Time-out can be switched on when free-run is on but

it will not serve any purpose.

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Page: 26 GPIB-INTERFACE OPERATION

Bus Triggering

’X’ wil l always cause the counter to start a new meas urement. X will work as group execu te trigger, GET. ’X’ mu st always be placed in the end of a program message.

Service Request

The counter can send a service request, SRQ, when it wants service from the contro ll er. After an SRQ, the co ntroller must ex ecute a serial poll wh ic h means that it must ask each of the instrumen ts for status information until it finds the SRQ-giving instru ment , ev alua te the Status-byte of the instrument and then make a decision what to do.

To enable the counter to send service requests, you must set an SRQ-mask telling the instrumen t whi ch con ditions will cause SRQ.

Command Comment

MSR <number> <number> is a decimal value

depending on selected SRQ reasons.

Bit Decimal value Reason for SRQ

7 128 Not used. 6 64 Time-Out. 5 32 Hardware fault. 4 16 Programming error. 3 8 Measuring stop enable. 2 4 Measuring start enable. 1 2 Ready for triggering. 0 1 Measuring result ready*.

* If SRQ for Measuring result ready is select ed, th e counter will stop and wait until the controller fetches the result before a new measurement can start.

Write down the binary word fo r the requ ire d SRQ, th en convert it to a decimal value an d in sert the value as <number>.

EXAMPLE: If you want SRQ to be sent when the timeout elapses, when the counter is ready for triggering and when the result is ready , the binary word required is 0100001 1 which is decimal 67; see table below.

Bit Value if Example

the bit is 1

7128 0 0 6 6 4 1 64 Time-Out 532 0 0 416 0 0 38 0 0 24 0 0 1 2 1 2 Ready to trigger 0 1 1 1 M eas. re sult r ead y

Send MSR 67 to the counter.

Binary word

Decimal value

+ 67

Status Byte

The counter sends its status byte to the controller on a serial poll. The bits in the status byte reflects different events or conditions in the counter. There are two types of status bits:

A conditional bit indicates the current co ndition of what its monitoring, all the time .

An event bit indicate that an ev ent has occurred. When the event occurs, the bit is set to 1. It is not reset to 0 until a new measurement starts.

The different bits indicate the following information:

Bit Function

7 Always 0 6 1 = SRQ has been sent*, otherwise 0 (Event bit). 5 Abnormal bit. Always 0 during normal

measurements,1 if something is wrong. Affects bit

0-3, see below (Event bits.) 4 0 = Main G ate clos ed, 1 = Main Ga te open** 3-0 Depends on Abnormal bit, see below (Event bits.)

Bit Abnormal bit = 1 Abnormal bit = 0

3 Not Used Measuring stop enable. 2 Time-Out Measuring start enable. 1 Hardware fault Ready for triggering 0 Programing error Measuring result ready.

* Only if SRQ-mask is set for Service-Request. ** This is a co nditio nal bit that m onit ors t he Ma in-

Gate in the counter. When TOT MAN is selected the bit will always be 0.

Measuring start enable indicates that the counter logic is ready to start a measurement.

Measuring stop en ab le indicates that the counter logic ir ready to sto p a me as urement.

These bits can be used to detect if the input signal to the counter is present; If the counter never stops it’s measurement and the status byte stops at:

XX00X1XX No input signal. The measurement is ready

to start (bit 2 = 1) but the Main Gate has not opened (bit 4 = 0).

XX011XXX Input signal lost during measurement. The

measurement is ready to stop (bit 3 = 1) but the m ain ga te i s st ill op en ( bit 4 = 1)

(X = don’t care)

NOTE: SRQ is normally not used for these bits.

Ready for triggerin g indicates that all preparations for a measurement is complet ed . The preparation time depends on selected functions. It can be up to 700 ms (when auto triggering is selected).

If triggered mode is selected, the counter waits to be triggered, otherwi se it proceeds with the measurement. You can have the SRQ-mask set for SRQ at ready for trigger-

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Page 28

GPIB-INTERFACE OPERATION Page: 27

ing. This way the controller knows when it is possible to trigger the counter.

Measuring result ready indicates that the measurement and calcula ti on of th e result is completed and tha t the result is present in the output buffer. If SRQ for is selected for this eve nt, or Free-run is OFF, the counting will stop until the controller has read the result.

Programming error is generated if the counter receives messages with illegal syntax or values out of its range.

If ’Programming error’ is generated, th e coun ter wi ll sto p measuring. It will con ti nue to receive and store correct programming messages and use them when the error status is reset and a new measurement starts.

Correct the program before resetting the status message.

Use one of the following bus commands to reset the status by te:

Go to local (GTL), Device clear (DCL) or selectiv e device clear (SDC).

Any of the following messages will have the same effect on the counter:

D, FNC?, MEAC?, INPA?, ID? or BUS?. A serial poll will also reset the status message if the

SRQ mask is set for ’SRQ at Programming error’. Hardware fault is generated when the counter displays

the codes described in ’Erro r cod es ’ in the ’Operating in structions’ in this manual.

Time-Out is generated when the set time-out period has elepsed.

Important

Deci-

Binary

mal*

76543210

6 00000110 XX0XX1XX Measuring start

22 00010110 XX01XXXX Main-Gate open 30 00011110 XX0X1XXX Measuring stop

14 00001110 Calc ulating th e

15 00001111 XX0XXXX1 Measuring result

Error Conditions

Deci-

Binary

mal*

76543210

33 00100001 XX1XXXX1 Programming error. 34 00100010 XX1XXX1X Hardware fault. 36 00100100 XX1XX1XX Time-out.

* If Service request (SRQ) is enabled for an event, the

decimal value of the status message for that event wil l be i ncrea sed by 64. The re ason fo r this is th at b it 6 wi ll b e set to one at th e sam e time as the bit indicating the event.

bits (X = don’t care) Comment

enable.

measurin g resul t.

ready.

Important bits (X = don’t care) Comment

Output Mode

Setting the output mode selects the format in which the counter will output measuring results to the controller. Select output mode by sen di ng OUTM <number> where <number> is a decimal value bet ween 0 and 4 depending on the selected output mode.

Possible Status Messages

Normal Measurement

The status byte changes as follows during a normal measurement:

0, 2, 6, 22, 30, 14, 15, 0, .........

Important

Deci-

Binary

mal*

76543210

0 00000000 Preparing a

2 00000010 XX0XXX1X Preparations ready. If

bits (X = don’t care) Comment

measurement or, Highspeed dump or Volt measurements in progress.

Free-run OFF

<number> High-speed

dump

0 OFF NORMAL ON 1 OFF SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH

Default <number> is 0, when switching to local and back again, the <number> will be reset to 0.

The MTCXO compensatio n ca n be swit ch ed off to increase the measuring speed, providing a result with five digits accuracy is suf fi cien t. The time ga in ed wil l b e u p to 400 ms/measurement.

** Mus t be in the end of a program message .

Output format

SPEED DUMP

MTCXO compensation

OFF **

PM 6669 - OPERATORS MANUAL

Page 29

Page: 28 GPIB-INTERFACE OPERATION

Output Format

Normal

When you select normal output format, the out pu t will be as follows:

Function command Header, 3-6 characters (same Header as used for selecting the function).

O when overflow, otherwise space.

Measureme nt result, al ways 9 digi ts and a decimal point. Same number of signific ant di gits as on the dis play of th e counter, leadin g ze roe s fill out the r est o f the 9 positi ons. The lef tmost di git can be replaced by a (min us sig n).

Separates the exponent from the digits.

Exponent sign, + or -. Exponent, on e digit. Output separator. LF if CR+LF is selected

as output separator.

FFFFFFOXXXXXXXXXXE±XS(S)

EXAMPLE:

21(22) characters

High-Speed Dump

The most time-cons uming part of a measuring cycle is calculating the result. The calculations limit the number of possible results/second to about 5, even when the Measuring-time is short.

When however Hig h-Sp eed dump is selected all cal cu la tions are left to the controller instead, and the counter can concentrate on measuring at a rate of over 100 measurements/second.

High-speed dump cannot be used for voltage measurements nor for Totalize manually. MTCXO compen sati on is not poss ible.

Starting

NOTE: Always make sure you have input signal and

that the input triggers correctly before turning on high-speed dump! (See stopping below.)

If triggered mode is OFF

When High-speed dump is programmed the counter will immediately start transmitting results, so the OUTM 4 command must always be placed at the end of the program message.

Normal operation:

PER 000001.667E-4

Overflow:

PER O9.99999999E+9

Short

Short format means that function command and leading zeros are not sent to the controller. When you select short output format , the number of digits may vary depending on the me as urement result. The ex ampl e b el o w shows a result with five significant digits:

Measurement result, same number of digits as on the di spla y of t he c ount er; ma y v ary between 1 and 9 di gits, pl us decima l point. No leading zeros are sent.

Same as for normal output format.

X.XXXXE±XS(S)

EXAMPLE:

Normal operation:

1.667E-4

Overflow:

9.99999999E+9

If triggered mode is ON

After receiving OUTM 4 the counter waits for bu s command GET before it starts.

NOTE: The minimum time between OUTM 4 and GET

is 70 ms.

Stopping

Any programming command from the controller will end High-Speed dump. High-speed dump is stopped inbe tween two measzurements. If you swit ch on hi gh speed dump without having an inp ut signa l, the cou nt er must be switched off/on to regain control over the counter.

NOTE: The Power-switch is the only front panel control

that will stop High-Speed dump, the LOCALkey will not have any effect.

Output For mat

The output format will always be two letters followed by 12 hexadecimal digits. The two letters will tell the controller how to evaluate the twelve hex-digits, which repre sent the contents in the internal registers of the counter.

Formula

Multiplier

Hex-digits

Separators*

FM111111222222S(S) 15(16) characters

PM 6669 - OPERATORS MANUAL

* The counter cannot signal EOI together with the out-

put separator when High-speed dump is selected.

Page 30

GPIB-INTERFACE OPERATION Page: 29

Hex-Digits

All 12 digits together represent register 3.

MSB LSB

111111222222 =

= 333333333333

When the digits are divided into two groups, the first six digits represents register 1 and the last si x digits represent register 2.

MSB LSB

111111 222222

Formula

Depending on the selected measuring function different calculations must be made to conve rt th e register contents to readable measuring results.

The first letter (F) in the output data indicates which formula you must use.

If ’F’= Use this formula

Reg

F G

Reg

J K

Reg

. 2 ∗ 10

. 1

. 3

. 2 . 1

. 1 ∗ 10

. 2

. 3 ∗ 10

. 2 ∗ 10

. 1

−7

Multiplier

The second lette r (M) in th e ou tp ut data represents a multiplier which you must multiply the results by before presentin g it .

If ’M’= Multiply result s by:

H60 L256 N0.1 O10 P1

EXAMPLE 1:

The following HP-8 5 pro gra m se ts up a Hig h-Speed dump Single-period measurement.

OUTPUT 710;"PER A,MTIME 0" ENTER 710;A$

A$ PER 000001.667E-4

OUTPUT 710;OUTM 4 ENTER 710;A$

A$ JP000000000683

’J’ me an s that you must use for mu la J wh ic h is:

Reg

00000000 06 83 is the hex-conte nts of register 3. T he register contents must be converted to a decimal number and entered in the formula;

683

Hex

The result is 1667*10-7. which you must multiply by "Multiplier P", which is 1, to get the measuring result.

1667

−7

. 3 ∗ 10

= 6 ∗ 162 + 8 ∗ 16 + 3 = 1667

−7

∗ 10

∗ 1 = 1.667 ∗ 10−4 s = 166.7 µ

decimall

EXAMPLE 2:

The following HP-8 5 pro gra m se ts up a Hig h-Speed dump Frequency A measurement with 1 s Measuringtime.

OUTPUT 710;"FREQ A,MTIM E 1" ENTER 710;A$

A$ FREQ 006.000006E3

OUTPUT 710;OUTM 4 ENTER 710;A$

A$ CO98555B000257

Reg

Formula ’C’ is:

98555B is the hex-contents of register 1, and 000257 is the hex-contents of register 2. Both register contents must be converted to decimal numbers and put into the formula;

(2 ∗ 16

9 ∗ 165 + 8 ∗ 164 + 5 ∗ 163 + 5 ∗ 162 + 5 ∗ 16 + 11 = 600.0006209..

This number is multiplied by multiplier ’O’ to get the measuring result:

600.0006209 ∗ 10 = 60 00 .0 06 209 = 6.000006209 ∗ 103

+ 5 ∗ 16 + 7) ∗ 10

. 2 ∗ 10

Reg

. 1

How Many Digits are Significant?

Select the formula for ’LSD displayed’ in the ’Specifications’. There are di fferent formula s f or d ifferent measure ments.

Frequency :

−7

∗10

∗

LSDdisplayed

LSD = 0.001 Hz The result is 6.000006

2.5

Measuring

∗10

2.5

FREQ

−

time

−7

∗ 6000....

*10

= 0.0015

PM 6669 - OPERATORS MANUAL

Page 31

Page: 30 GPIB-INTERFACE OPERATION

Bus Learn

– Set the counter to LOCAL and select the functions you

want from the front panel.

– If required, set the counter to Remote and program spe-

cial bus-functions from the controller.

– Check that the counter/controller performs the intended

functions.

– If it does, send the f ive queri es fr om t he con troll er to

the counter and store the responses in the controller for later use.

These are the five queries:

Max No. of Char-

Query Response

FNC? Functions setting; e.g. FREQ A 9 MEAC? Measurement control;

MTIME <number>,FRUN ON TOUT <number>

INPA? Input-A settings;

TRGSLP POS 10

BUS? Bus interface commands;

MSR <number>,OUTM <number> EOI OFF,SPR <number>

acters

20 9

16 15

Programming Data Out

Any one of the queries used for Bus Learn can be used to ask the counte r a bo ut its current setting, see ’Bus Learn’ above.

What Happens When I Switch to Local?

Switching to LOCAL cau ses the coun te r to ad apt th e settings indicated on the display, see ’How to select function’. This means tha t the counter will never have settings in LOCAL whic h are not possi ble to set via the front panel.

When switching to remot e agai n, the LOCAL-setting will remain. Bus-functi on s like SRQ mask, ou tp ut separator, EOI, etc. will not be altered by switc hi ng to LOCAL and back again.

As you can see, the responses are the same commands as you use for normal programming. So if you have to change anything in a program made using bus learn, or add functions which are not selectable from the front panel, these program messages can easily be edited in the control le r.

NOTE: MEAC? and BUS? result in a response sent as

two lines, each terminated by the selec ted separator.

NOTE: The counter will stop measuring until all lines of

the response have been read or the response has been terminated.

NOTE: The query command must always be the last

command in a program message.

Terminatin g a Response

It is not necessary to read all output lines. Any program message will terminat e the response.

PM 6669 - OPERATORS MANUAL

Page 32

GPIB-INTERFACE OPERATION Page: 31

Summary of Bus Commands

Function Selecting Command s

FREQ A Frequency measurement on Input-A. FREQ B Frequency measurement on Input-B. RPM A Revolutions/minute on Input-A. PER A Period on Input-A. WIDTH A Pulse width on Input-A. PWIDTH A Pulse width on Input-A. TOTM A Totalize A, start/stop by

GATE OPEN/CLOSED on the bus.

FNC? Output the current function setting.*

Input Setting Comm ands

TLO AUT Auto trigger level. TLO POS Pos itive tri gger le vel offs et TLO SYM No trigger le vel offs et TLO NEG Negative tri gger le vel offs et TRGSLP POS Triggering on positive slope. TRGSLP NEG Triggering on negative slope. INPA? Output the current Input-A settings.*

Measurement Control Commands

GATE OPEN Starts the totalizing in TOTM A. GATE CLOSE Stops totalizing. MTIME <num> Set Measuring-time. <num> = 0.01-

10 s. 0 = SINGLE FRUN ON Selects Free-Run. FRUN OFF Selects Triggered mode. TRIG OFF Selects Free-Run. TRIG ON Selects Triggered mode. TOUT <num> Sets Time-Out. <num> = 0.1 - 25.5 s.

0 = Time-Out OFF. MEAC? Output the current Measurement

control settings.*

Bus Related Commands

OUTM <number>

High-

0 OFF NORMAL ON 1 OFF SHORT ON 2 OFF NORMAL OFF 3 OFF SHORT OFF 4 ON FOR HIGH

MSR <num> Sets SRQ-mask, see ’Service request’. EOI ON Selects EOI-mode ON. EOI OFF Selects EOI-mode OFF. SPR <num> Select output separator, see ’Output

X Device tri gger, star ts a new meas urem ent.* D Device clear, returns to default settings. BUS? Output the current bus related settings.* ID? Output id entity and whic h option s are

* This comm and mu st be placed at the end of a pr o-

gram message.

speed dump

separators’.

installed.*

Output format

SPEED DUMP

MTCXO compensation

OFF*

PM 6669 - OPERATORS MANUAL

Page 33

Page: 32 GPIB-INTERFACE OPERATION

Programming Examples

For HP-85 Controller

This program illustrate high measuring rate obtained with High-speed dump.

The actual measuring function is selected by the user in Local-mode. When the program runs, two beep’s can be heard from the HP-85 , Bet ween these beep’ s, the counter performs 500 measurements and the result of each measurement is tra ns fe rred from the counter to the HP-85.

The output rate is app rox imately 125 readings/second in this example.

10 ! DEMO PROGRAM DUMP MODE 20 ! PM6669 WITH HP85 AS 30 ! CONTROLLER 40 ! DUMP MODE WITH FREE RUN ON 50 CLEAR 60 DIM Z$[7508] ! BUFFER FOR 500

MEASUREMENTS WITH 15 BYTES 70 DIM B$[14] 80 IOBUFFER Z$ 90 LOCAL 710 100 DISP "SELECT FUNCTION IN LOCAL MODE!" 110 DISP "MEASURING TIME WILL BE" 120 DISP "SELECTED BY HP85 (SINGLE)!" 130 DISP "ANSWER Y WHEN READY TO START!" 140 INPUT A$ 150 IF A$<>"Y" THEN 130 160 DISP "MAKE 500 MEASUREMENTS" 170 OUTPUT 710 ;"TRIG OFF,MTIME 0,OUTM 4" 180 BEEP 190 E=TIME 200 TRANSFER 710 TO Z$ FHS ; COUNT 7500 210 F=TIME 220 TIME 230 DISP "READY! ELAPSED TIME:";F-E;"s" 240 ! SHOW 5 RESULTS" 250 DISP "FIRST 5 RESULTS:" 260 FOR K=1 TO 5 270 ENTER Z$ ; B$ 280 ! GET FORMULA CHARACTER 290 F$=B$[1,1] 300 ! GET MULTIPLYER CHARACTER 310 M$=B$[2,2] 320 ! EVALUATE REGISTER 1 330 R1=0 340 FOR I=1 TO 8 350 S=NUM(B$[I,I])-48 360 IF S>=10 THEN S=S-7 370 R1=R1*16+S 380 NEXT I 390 ! EVALUATE REGISTER 2 400 R2=0 410 FOR I=9 TO 14 420 S=NUM(B$[I,I])-48 430 IF S>=10 THEN S=S-7 440 R1=R2*16+S 450 NEXT I 460 ! EVALUATE RESULT 470 IF F$="C" THEN R=10000000*R2/R1 480 IF F$="F" THEN R=R1*16^6+R2

490 IF F$="G" THEN R=R2/R1 500 IF F$="I" THEN R=.0000001*R1/R2 510 IF F$="J" THEN R=.0000001*(R1*16^6+R2) 520 IF F$="K" THEN R=.0000001*R2/R1 530 IF M$="H" THEN R=R*60 540 IF M$="L" THEN R=R*256 550 IF M$="N" THEN R=R/10 560 IF M$="O" THEN R=R*10 570 IF M$="P" THEN R=R*1 580 DISP B$,R 590 NEXT K 600 LOCAL 710 610 END

Example of a result:

MEASURING TIME WILL BE SELECTED BY HP85 (SINGLE)! ANSWER Y WHEN READY TO START! ? Y MAKE 500 MEASUREMENTS READY! ELAPSED TIME: 3.931 S FIRST 5 RESULTS: JP000000000031 .0000049 JP000000000030 .0000048 JP000000000031 .0000049 JP000000000031 .0000049 JP000000000031 .0000049 5053

PM 6669 - OPERATORS MANUAL

Page 34

GPIB-INTERFACE OPERATION Page: 33

For IBM PC with PM 2201

Example 1

The following example runs on an IBM compatible PC equipped with Fluke PM 2201 GPIB interface. Th e insta llation and starting up of the PC program is not described, only the application program. Line 1 to 100 must contain the declaration described in the PM 2201 manual.

The program set s u p t he counter for 10 Peri od A measurements and presents the average result on the screen.

100 ’DEMO PROGRAM (NO 1) 110 ’PM6669 AND IBM PC 120 ’WITH PM2201 GPIB INTERFACE 130 ’AS CONTROLLER 140 CLS ’CLEAR SCREEN 150 AD=7 ’ADAPTOR NUMBER 160 ADDR=710 ’COUNTER ADDRESS 170 SC=1 ’SYSTEM CONTROLLER 180 RES$ = SPACE$(25) ’RESULT 190 ACT = 0 ’# READ CHARACTERS IN RES$ 200 MAX = 24 ’MAX CHARACTERS TO READ IN

RES$ 210 CALL IOINIT(AD,SC) ’INIT INTERFACE 220 TIME=10 ’TIMEOUT AFTER 10 SECONDS 230 CALL IOTIMEOUT (AD,TIME) ’SET TIMEOUT 240 CALL IOCLEAR(ADDR) ’SEND SDC 250 ’SELECT PERIOD A, TRIGGERED MODE 260 ’AND 1 S MEASURING-TIME 270 SEND$ = "PER A,TRIG ON,MTIME 1" 280 LENGTH=LEN(SEND$) 290 CALL IOOUTPUTS(ADDR,SEND$,LENGTH) 300 Z=0 310 ’INPUT 10 SAMPLES 320 FOR i = 1 TO 10 330 CALL IOTRIGGER(ADDR) ’TRIGGER COUNTER 340 CALL IOENTERS(ADDR,RES$,MAX,ACT) ’READ

RESULT 350 Z = Z + VAL(MID$(RES$,8,13)) 360 NEXT I 370 PRINT "AVERAGE:";Z/10;"S" 380 CALL IOLOCAL(ADDR) ’GO TO LOCAL 390 END

Example of a result:

AVERAGE: 9.98004E-06 S OK

Example 2

This program example ill us tra tes the ‘program data out’ feature of PM 6669. By asking a set of queries, the counter responds with its current setup. The output format of these ans wers t o th e queries is identica l to the programming command format. The answers can be stored and used lat er for reprogramming (bus learn).

100 ’DEMO PROGRAM 110 ’PM6669 AND IBM PC WITH PM2201 120 GPIB INTERFACE AS CONTROLLER 130 AD=7 ’ADAPTOR NUMBER 140 ADDR=710 ’COUNTER ADDRESS 150 SC=1 ’SYSTEM CONTROLLER 160 CALL IOINIT(AD,SC) ÍNIT INTERFACE

170 TIME=10 ’TIMEOUT AFTER 10 SECONDS 180 CALL IOTIMEOUT(AD,TIME) 190 CLS ’CLEAR SCREEN 200 ÁSK FOR AND PRINT PROGRAM DATA 210 PRINT "COUNTING SETTING:" 220 S$ = "FNC?" 230 GOSUB 520 240 A=1 250 GOSUB 550 260 S$ = "MEAC?" 270 GOSUB 520 280 A=2 290 GOSUB 550 300 S$ = "BUS?" 310 GOSUB 520 320 A=2 330 GOSUB 550 340 S$ = "INPA?" 350 PRINT "INPA:" 360 GOSUB 520 370 A=1 380 GOSUB 550 390 S$ = "INPB?" 400 PRINT "INPB:" 410 GOSUB 520 420 A=1 430 GOSUB 550 440 S$ = "ID?" 450 PRINT 460 PRINT "COUNTER TYPE:" 470 GOSUB 520 480 A=1 490 GOSUB 550 500 CALL IOLOCAL (ADDR) ’GO TO LOCAL 510 END 520 L=LEN(S$) ’LENGTH OF STRING TO SEND 530 CALL IOOUTPUTS(ADDR,S$,L) ÓUTPUT STRING 540 RETURN 550 FOR I = 1 TO A 560 MAX=25 570 ACT=0 580 RES$=SPACE$(25) 590 CALL IOENTERS(ADDR,RES$,MAX,ACT) 600 B$ = LEFT$(RES$,ACT) 610 PRINT B$; 620 NEXT I 630 RETURN

Example of a result:

COUNTER SETTING: TIME A;B MTIME 1.00,FRUN ON TOUT 00.0 MSR 000,OUTM 000 EIO OFF,SPR 010 INPA: TRGSLP NEG INPB: TRGSLP POS

COUTER TYPE: PM6669/016/22 Ok

PM 6669 - OPERATORS MANUAL

Page 35

Page: 34 GPIB-INTERFACE OPERATION

Example 3

This program prompts the user to input a programming sequence. The sequence is then sent to the PM 6669 and the correspon ding measuring result is read .

Let us as an example select Sing le Pe rio d me as ure ments, without AUTO-triggering (gives faster operation).

100 ’DEMO PROGRAM 110 ’PM6669 AND IBM PC WITH PM2201 120 ’GPIB INTERFACE AS CONTROLLER 130 CLS ’CLEAR SCREEN 140 AD=7 ’ADAPTOR NUMBER 150 ADDR=710 ’COUNTER ADDRESS 160 SC=1 ’SYSTEM CONTROLLER 170 CALL IOINIT(AD,SC) ’INIT INTERFACE 180 TIME=10 ’TIMEOUT AFTER 10 SECONDS 190 CALL IOTIMEOUT (AD,TIME) 200 CALL IOCLEAR(ADDR) ’SEND SDC 210 PRINT "INPUT YOUR PROGRAMMING MESSAGE?" 220 PRINT "(TO QUIT THE PROGRAM, ANSWER *)" 230 LINE INPUT S$ 240 L=LEN(S$) ’LENGTH OF STRING TO SEND 250 IF L<>1 GOTO 280 260 IF S$<>"*" GOTO 280 270 END 280 CALL IOOUTPUTS(ADDR,S$,L) ’OUTPUT STRING 290 ’TO BE SURE, TRIGGER COUNTER! 300 CALL IOTRIGGER(ADDR) 310 ’GET THE MEASURING RESULT 320 MAX=25 330 ACT=0 340 RES$=SPACE$(25) 350 CALL IOENTERS(ADDR,RES$,MAX,ACT) 360 PRINT 370 PRINT "RESULT READ AS: ";RES$ 380 PRINT 390 GOTO 210

Example of a result:

INPUT YOUR PROGRAMMING MESSAGE? (TO QUIT THE PROGRAM, ANSWER *) PER A,MTIME 0

RESULT READ AS: PER 0000001.00E-5

INPUT YOUR PROGRAMMING MESSAGE? (TO QUIT THE PROGRAM, ANSWER *)

For IBM PC with IBM GPIB

This example runs on an IBM PC with an ‘IBM General Purpose Interface Bus Adapt er’ instead of the Fluke PM 2201 interface.

The following set of device parameters is suitable for a PM 6669 with address 10. The de vi ce pa rameters are set with the configuratio n pro gra m ‘IBCONF’ , se e the IBM adapter manual.

Device Name: COUNTER DEVICE PARAMETERS Number: D 0

Send EOI w/last Byte of Write? Yes [Yes or No]

Example 1

The following program sets up the counter for 10 Period A measurements and presents the average result on the screen.

100 ’DEMO PROGRAM 110 ’PM6669 AND IBM PC WITH IBM 120 ’GPIB ADAPTOR AS CONTROLLER 130 CLS ’CLEAR SCREEN 140 ’INIT 150 ADNAME$ = "COUNTER" 160 CALL IBFIND(ADNAME$,CNT%) 170 ’SEND SDC 180 CALL IBCLR(CNT%) 190 ’SELECT PERIOD A, TRIGGED MODE 200 ’AND MEASURING TIME 1 S 210 WRT$ = "PER A,TRIG ON,MTIME 1" 220 CALL IBWRT (CNT%,WRT$) 230 ’INPUT 10 SAMPLES 240 Z=0 250 FOR I= 1 TO 10 260 CALL IBTRG(CNT%) ’TRIGGER COUNTER 270 CALL IBRD(CNT%,RD$) ’READ RESULT STRING 280 Z = Z + VAL (MID$(RD$,8,13)) 290 NEXT I 300 PRINT "AVERAGE:";Z/10;"S" 310 CALL IBLOC(CNT%) ’GO TO LOCAL 320 END

DESCRIPTION NEW VALUE VALID NAME

Access Adapter Name? GPIB0 [GPIBx]

Primary GPIB Address? 0AH [0H to 1EH]

Secondary GPIB Address? 00H [60H to 7EH; 0H disables]

Timeout setting? T10s

Terminate Read on EOS? Yes [Yes or No]

Send EOI with EOS byte? No [Yes or No]

Use 8-bit Compare on EOS? No [Yes or No]

EOS Byte? 0AH [0H to FFH or '<character>]

[T10us to T1000s;TNONE disables]

± ± ±

PM 6669 - OPERATORS MANUAL

Example of a result:

AVERAGE: 9.980422E-06 S Ok

Page 36

SPECIFICATIONS Page: 35

SPECIFICATIONS

Measuring Functions

Frequency A or B

Range,

Freq A: Freq B:

Mode: Reciprocal frequency counting.

LSD unit displayed:

Frequenc y A/ A

A Freq ue nc y A measurement is p erformed. The measured frequency is divided by the constant A play. The resoluti on of th e displayed ratio is determined by the FREQ A mea suremen t. At power on A (default).

Frequency A- A

A F requency A measurement is performed. The value of the consta nt A quency before display. The resolution of the displayed difference is determined b y the FREQ A measurement. At power on A

0.1 Hz to 160 MHz

70 MHz to 1.3 GHz (option PM 9608B)

2.5 ∗ 10−7∗

Measuring

FREQ

time

before dis-

is set to 1

is substracted from the measured fre-

is set to 0 (default).

Mode: Single period measurement (SINGLE) or period aver-

age measurement (at 0.2, 1 or 10 s Measuring-times).

LSD Displayed:

SINGLE period measurement:

5 ∗

PERIOD

109

(

TIME

> 100

Period average measurement:

)

100 ns (

2.5 ∗ 10−7 ∗

TIME

Measuring

< 100s)

PERIOD

time

Totalize A

Event counting is controlled by the ST ART/STOP button. Sequential start-st op cou nt s are a cc umul at ed . RESET closes the gate and resets the Fre quency Counter to zero.

Range: 0 to 1*10

or Megapulses). The result is truncated if out of d is play range.

Frequency Range:

Sine-Wave: Pulse:

0 Hz to 16 MHz

Pulse Pair Resolution: 8 ns

with indication of k or M (Kilo-pulses

0 Hz to 16 MHz

RPM A

A FREQUENCY A measurement is d on e. The measured frequency is multiplied with 60, and shown on the display as revolutions per minute (RPM).

Range: 6 RPM to 720

106 RPM

Period A

Range: 8 ns to 2*10

LSD displayed: 1 unit count (counts < 10

5*counts/109 (counts ≥ 109)

)

Width A

A positive Pulse Width measurement is performed. Measuring time selection is not valid (always SINGLE measurement).

Range:

100 ns to 2 ∗ 10 8

PM 6669 - OPERATORS MANUAL

Page 37

Page: 36 SPECIFICATIONS

LSD Displayed:

5 ∗

WIDTH

10 9

(

TIme

100 ns (

> 100

TIme

)

< 100 s)

NOTE: Tri ggering on 50% of amplit ude will occur only if

the duty factor of the signal is 0.5.

Definitions

LSD Displayed LSD = Unit value of t he lea st signi fi ca nt

digit displayed. All calculated LSD:s (see section Measuring functi ons) should be rounded to the nearest decade (e.g 0.3 Hz is rounded to 0.1 Hz and 5 Hz to 10 Hz) and cannot exceed the 9th digit.

Resolution Resolution = smallest increment between

two measuring results on the display, due to the 1 count error.

Freq A, B, and Period A:

or 2 LSD units.

LSD

∗

If; the resolution is 2 LSD units (30 % probability). Other-

wise resolution is 1 LSD unit (70% prob ab il it y).

Measurin g time

FREQ

PERIOD

Resolution can be 1 LSD unit

−7

< 10

Input specifications

Input-A Frequency Range:

Sensitivity,

Sine:

10 mV

RMS

30 mV

Pulse:

typicall y 120 MHz to 160 MHz

RMS

30 mV

RMS

Coupling: AC

Impedance:

1 MΩ // 30 pF

Attenuation: Continously va riable in two range s be-

tween x1 and x400.

Filter: Switchable 50 kHz low pass noise filter, on Input-A,

with a suppression of 20 dB at 200 kHz.

Trigger Levels: Three different levels for triggering on

signals with various duty fa ctors, and AUTO.

symmetrical input signals, should be selected forinput

signals with a duty factor of 0.25 to 0.75%.

0 Hz to 160 MHz

10 Hz to 120 MHz

0.1 Hz to 120 MHz

SINGLE Period A and Width A:

LSD unit.

Resolution equals 1

Inaccuracy Inaccurac y, i.e the relative error, depends on

the following factors:

Resolution

FREQ

PERIOD, or WIDTH

± relative trigger erro r ± relative time bas e error

Relative trigger error, Freq A, Period A:

noise voltage A (V

signal slope A

(

⁄

)

Relative time base error:

∗

meas

)

time

deviation from

MHz

positive pulses, for input signals with duty factor

<25%.

negative pulses, for input signals with duty factor

>75%.

AUTO Trigger Levels: The counter will make test set-

tings and automatically selects the best trig level setting. AUTO requires repetetive signals with a repetition rate >100 Hz. AUTO is not active in TOTALIZE A measurements.

Trigger Slopes via GPIB Only: Positive or negative.

Maximum Voltage: 350 V (DC + AC

and 440 Hz, falling to 11 V

at 1 MHz.

RMS

) between 0

peak

Input-B

(option PM 9608B) Frequency Range:

Coupling: AC

70 MHz to 1.3 GHz

PM 6669 - OPERATORS MANUAL

Operating Input Voltage Range:

10 mV 15 mV 40 mV

RMS RMS RMS

to 12 V to 12 V to 12 V

, 70 MHz to 900 MHz

RMS

, 900 MHz to 1.1 GHz

RMS

, 1.1 to 1.3 GHz

RMS

Page 38

SPECIFICATIONS Page: 37

AM Tolerance: 98%, minimum signal must exceed mini-

mum operating input vo ltage requirement

Impedance:

Maximum Voltage Without Damage: 12 V

load protection with PIN diodes.

50Ω nominal, VSWR <2:1

RMS

, over-

Ext Reference Input

The input automatically detects when a suitable external reference signal is connected. The use of an external reference signal is indicated on the display.

Input Frequency:

Coupling: AC

Sensitivity: 500 mV

Input Impedance:

Max Input Voltage: 15 V

10 MHz ±0.1 MHz

RMS

approx. 300 Ω at 10 MHz

RMS

Environmental Conditions

Temperature,

Operating: Storing:

Altitude,

Operating: Storing:

Humidity,

Operating: Storing:

Vibration Test: According to IEC 68Fc

Bump Test: According to IEC 68Eb

Handling Test: According to IEC 68Ec

0°C to +50°C

-40°C to +70°C

5000 m (53.3 kN/m2)

15000 m (15.2 kN/m2)

10% to 90% RH, no condensation

5% to 95% RH

General Information

Power Requirements

Line Voltage: 115 or 230 V

46 to 440 Hz, (<20 VA incl. all options).

Safety: in accordance with IEC publication 1010-1, and

CSA 22.2 No.231.

Line Interference: below VDE 0871 B and MIL STD

461.

Battery Unit: See PM 9605 option.

Dimensions and Weight

Width: Height: Depth: Weight,

186 mm

88 mm

270 mm

net: 2.1 kg, shipping:3.0 kg

Cabinet: The co un ter is housed in a meta l cabinet, to

minimize electro-magnetic interference and achieve good mechanical stability.

RMS

15%;

Display

Read Out: 9 digit LCD display with un it indic at io n.

Unit Indication:

M, k, m, µ,and n.

MHz, kHz, Hz, mHz, ks, s, ms, µs, ns,

GATE Indicator: Indicates that the counter is busy

measuring.

REMOTE Indicator: Indicates when control over the

counter is taken over by an installed GPIB interfa ce PM 9604.

Cursor: Indicates selected measuring function, selected

Measuring-time, input trigg eri ng, display hold and whether an external reference frequency is in use.

Time Base (Crystal Oscillator)

Choice of:

Uncompensated crystal oscillator (order no

–

PM 6669/.1. )

– MTCXO, i.e. Mathematically Temperature Compen-

sated Crystal Oscillator (order no PM 6669/.3.). The MTCXO can be ordered separately for later upgrading of the counter (option PM 9607).

MTCXO Working Principle: The temperature of the

crystal is measured. The built-in microprocessor calculates the frequency deviation for that particular temperature from a stored table. The measuring result is mathe-

PM 6669 - OPERATORS MANUAL

Page 39

Page: 38 SPECIFICATIONS

matically correct ed f or th e time-base frequency te mperature error, before being displa ye d.

Oscillator Version:

Uncompen-

sated Stability against: Ageing per month < 5 *10 per year < 5 *10 Temperature changes 0 to

50°C Line voltag e chan ges 10% < 1 *10

< 1 *10

MTCXO

-7

< 1 *10

-6

< 5 *10

-5

< 2 *10

-8

< 1 *10

-7

-9

Auxiliary Functions

Power On/Off

Switches counter powe r on /off. At power up a sel f-t es t i s made and the counter is set to default settings.

Default Settings,

Function: Measuring-Time:

FREQ A

0.2 s

Displ Hold/Store A

The DISPL HOLD/ ST ORE A0 button has two functions:

DISPL HOLD The result of the curre nt mea su remen t will

be frozen on the d is pl ay. A new measurement st art s when RESET button is pressed.

STORE A

ments only . When the button is pressed for > 1 s, the result on the display is stored as the constant A used for the calculation of frequ ency difference (A-A and ratio (A/A

This function is active in FREQ A measure -

, which is

)

Blank Digits

This function blanks any number of least significant digits on the display, in order to hide unstable digits on the display.

Optional Accessories

GPIB-Interface, PM 9604

Mounting: Inside counter cabinet.

Trigger-Level Offset:

AUTO

Reset

The RESET -b ut to n has three functions:

RESET Starts a new measurement. The settings

are not changed.

LOCAL Makes the counter go to LOCAL operat

ion, when in remote operation (unless Local Lock-Out is programmed).

START/STOP Opens/closes the gate in TOTALIZE A or B

manual mode.

Measuring-Time

A measu rin g-t ime of 0.2 s, 1 s, 10 s or SINGLE can be selected.

NOTE: When SINGLE is selected together with PE-

RIOD, or WIDTH, the result is a single cycle measurement, but SINGLE together with FREQUENCY or RPM results in a fixed 3 ms Measuring-time.

Measuring Rate: Approx. 5 measurements/s.

Display Time: Normally the display time equals the set

Measuring-time. When SINGL E is select ed , a displa y time of 0.1 seconds is used.

Interface Functions: SH1, AH1, T5, L4, SR1, RL1,

DC1, DT1, E2

Address Setting: Switch selectable at rear panel be-

tween 0 and 30. Factory preset at 10.

Programmable Device Functions:

Measuring functions Measuring-time Trigger slope Manual Totalize gate control Output sepa rator selection Device clear Device trigger High-spee d du mp MTCXO on/off Short output format Free run/Triggered measurements Set SRQ-mask Program d ata out queries Device identity query

Programming Code Format: 7-bit ISO code (ASCII)

characters. Both upper and lower case characte rs are accepted.

Input Separator: The counter acce pts the following

characters as sep arators: ETX, ETB, CR, LF, ’ ’(space) ’,’(comma), ’:’(colon) ’;’(semicolo n).

PM 6669 - OPERATORS MANUAL

Page 40

SPECIFICATIONS Page: 39

Output Data Separator: Default separator at power-on

is LF. The separator can be programmed to be any non printable ASCII-co de wit h decimal equivalent 0-3 1, except 27 (ESC).

In addition the comb in ation 13+10 (CR+LF) can be programmed. The EOI-line can be programmed to be active together with the last output by te sent.

Output Format:

Measuring result is sent as:

Function c ode 3 to 6 cha racte rs

Normally space. O on overflow

Measuring result

Exponent pointer Exponent sign (+ or -) Exponent value 0 to 9 Selected separator

Second separator LF only if o utput separator CR+LF has been s elec ted.

FFFFFFOXXXXXXXXXXE±XS(S)

When you select ’Short output format’ FFFFFF and leading zeroes are omi tted.

21(22) characters.

High-Speed Dump

The contents of th e co unting registers are tra ns ferred to the controller, without being processed by the counter. The processing must be done in the controller instead. Max output rate is approximately 100 readings/s.

The output format is FMXXXXXXXXXXXXS(S) where F is calculation formul a, M is multiplier , X.. X = 12 he x-digits representing the regi st er co nt en ts , and S(S) is the set output separator.

Ranges: Same as for normal operation, with the following

exceptions:

Frequency; Period, Average; Time Interval, Average;

Max measuring time: 4 s

Max measuring time: 1 s

Max measuring time: 1.4 s

0 ns to 1.6 s

The highest output rate is obtained at SINGLE Measuring-time.

Output Time for Measuring Data;

Normal operation: High-speed dump:

Response time for addressing:

Approx. 10 ms (21 bytes)

Approx. 4 ms (15 bytes)

Approx. 5 µs

Response Time for Trigger Command (GET):

Normal Operation: High-Speed Dump:

Approx. 10 ms

Approx. 2 ms

Response Time for Serial Poll: Approx. 1.5 ms

Input Buffer Size: 28 bytes

Typical Read Time for Programming Data: Ap-

prox. 1 ms/by te (unless inpu t buffer is full)

Battery Unit PM 9605

The PM 9605 is a rechargeable batte ry unit for mounting inside the counter. The unit contains a standard 6 V sealed lead-acid battery and an automatic battery charger.

Battery Capacity (20°C): Approx 15 Wh

Operating Time When Battery Powered: 3 hours of

continuous operation.

Recharging Time: 7 hours to approx 75% of full capac-

ity.

Battery Protection: Overcharge protection and auto-

shut-off total discharge protection.

Temperature,

Operating: Storage:

Weight: 0.8 kg

0 to +40°C

–40 to +50°C

Ratio A/B: Ratio B/A:

0 and 6*10-7 to 1.6*10

0 and 6*10-8 to 1.6*10

Ratio C/A, C/B:

8 to 4*10

Max Data Output Rate: Normal mode gives >5 read-

ings/s. High-speed dump give s >100 read in gs /sec on d.

Rack Mounting Adapter, PM 9606/01

The PM 9606/01 is a 19" wide Rac k Mounting Adapter. It can host on e P M 66 62, PM 6665, PM 6666 or PM 6669 Counter only.

Rack Mounting Adapter, PM 9606/02

The PM 9606/02 is a 19" wide Rac k Mounting Adapter. It can host on e P M 66 62, PM 6665, PM 6666 or PM 6669 Counter together with a second instrument.

PM 6669 - OPERATORS MANUAL

Page 41

Page: 40 SPECIFICATIONS

That second instrument can be a Philips PM 2534 to 35 or a FLUKE 8840 Digital Multimeter, or anot he r PM 666X co unter.

High Stability Time-Base PM 9607

See specifications for option al MTCXO time-ba se .

HF-Input PM 9608B

See specifications f or optional Inpu t-C.

Ordering Information

Versions

The PM 6669 ordering number consists of the basic type number and a 3 digi t XYZ suffix, specifying th e required con-figuration.

indicating maximum frequency (0, 3 or 4)

indicating time base oscillator (1 or 3) indicating inte rface (1, 3 or 6)

PM6669/ X Y Z

Type No. Description

PM 6669/011 Frequency counter, 160 MHz

frequency range, uncompensated oscillator 5*10 operators manual.

PM 6669/4.. As above, bu t includ ing 1.3 GH z HF-

input PM 9608B.

PM 6669/.3. As above, bu t includ ing cry stal

oscillator PM 9607 (MTCXO).

PM 6669/..3 As above, bu t includ ing batt ery unit

PM 9605.

PM 6669/..6 As above, bu t includ ing GPIB

interface PM 9604.

-7

/month, incl .

Options and Accessorie s

PM 9604 GPIB-interface PM 9605 Battery unit PM 9606 Rack-mount kit PM 9607 MTCXO time-base PM 9608B 1. 3 GHz HF-i nput PM 9609 Carrying case PM 2296/50 IEEE to IEC adapter PM 2295/05 IEEE cable, 0.5 m PM 2295/10 IEEE cable, 1 m PM 2295/20 IEEE cable, 2 m PM 8911 1.5 GHz, 500Ω probe set, 1:10 PM 8922 120 MHz, 1 MΩ probe set, 1:1 and 1:10 PM 8943 650 MHz, 1 MΩ FET probe set PM 9581 50Ω termination, 3 W PM 9585 50Ω termination, 1 W All options mentioned above can be installed by the cus-

tomer.

NOTE: The GPIB interface PM 9604 and the battery

unit PM 9605 can not be installed together in a PM 6669 counter.

Manuals

4822 872 20021 Operators Manual 4822 872 20022 Operators Manual (German) 4822 872 20023 Operators Manual (French) 4822 872 25006 Service Manual 4822 872 20016 GPIB Pocket Guide

Example: PM 6669/416 means a PM 6669 frequency

counter, including both an 160 MHz and an

1.3 GHz input channel, an uncompensated oscillator and a GPIB interface.

PM 6669 - OPERATORS MANUAL

Page 42

APPENDIX 1 Page: 41

APPENDIX 1

Checking the Sensitivity of Counters

Introduction

The sensitivit y of a counter is normally specifi ed as the minimum signal voltage on which the input of the counter will trigger correctly.

When you use a signal-source with an output-impedance of 50 Ω, constant-outpu t-amplitude, and the counter has a 50Ω input-impedance, the input signal of the counter is in theory independent of the cable length. However , if th e in pu t impe da nc e devi at es from 50Ω there will be standing wave reflections which will cause changes in the amplitude of the signal between the signal-source and the counter input.

Two fa ctors determine the magn it ude of the changes, i.e. freq uency and capacitive load.

EXAMPLE:For a 1 MΩ//35 pF input, the 35 pF parallel

capacitance is approximately equal to a 50 capacitive load at 100 MHz.

Consequently, it is of the utmost importance to know how sensitivity is measured.

Recommended Instruments

– Signal-source with a 50Ω output impedance. – >350 MHz oscilloscope with a 50Ω input impedanc e. – BNC T-piece. – Two BNC-cables, one short and one long.

High-Impedance Inputs (1 MΩ)

Signal source

50 ohm

Attenuator

(if required)

Counter under test

T-piece directly on counter

Oscilloscope

350 MHz

Shortest cable possible

Preparations

Connect the instruments as illustrated in the figure above. Set th e counter to maxi mu m sensitivity.

Method 1

Ω

– Adjust the amplitude of the signal-source to the mini-

mum level accepted by the counter.

– Read the amplitude on the oscilloscope. – Check that the reading is the same as, or less than,

the sensit ivity le vel in the counter sp ecif icatio ns.

Method 2

– Adjust the amplitude of the signal-source until the oscil-

loscope indicates the sensitivity limit in the counter specific atio ns.

– Check that the counter is operating correctly.

50 ohm

Low-Impedance Inputs (50Ω)

If you have a calibrated signal-source

– Adjust the signal-source to the sensitivity limit of the

counter.

PM 6669 - OPERATORS MANUAL

Page 43

Page: 42 APPENDIX 1

– Connect it directly to the input of the counter. – Check that the counter is operating correctly.

If you don’t have a calibrated signal-source

Use either of t he following methods

Method 1

– Connect the output of the signal-source directly to the

input of the c ounter.

– Turn off AUTO and Set the counter to maximum sensi-

tivity (if adjustable).

– Adjust the amplitude of the signal-source to the mini-

mum level accepted by the counter.

– Disconnect the cable from the counter and connect it to

the oscilloscope.

– R ead the ampl itude on the oscil loscope.

– Check that the reading is the same as, or less than,

the sensitivity level in the counter specifications.

Method 2

– Connect the signal-source to the oscilloscope. – Adjust the output amplitude of the signal-source until

the oscilloscope indicates the sensitivity limit in the counter sp ecif icatio ns.

– Disconnect the cable from the oscilloscope and con-

nect it to the co unter.

– Set the counter to maximum sensitivity (if adjustable). – Check that the counter is operating correctly.

These procedures ensure unambiguous meas urements of the signal voltage at the input of the counter.

PM 6669 - OPERATORS MANUAL

Page 44

INDEX Page: 43

INDEX

Abnormal bit

See Status byte

Selecting...................................18

Accessories......................... ........... 4 0

Address..........................................22

Battery unit

Operation... .. .. .............. .. ...........20

Preventive maintenance ..........20

Specification.............................39

Storage.....................................20

Blank digits button

Location......................................4

Bus commands

Summary ................................. 31

Bus drivers.....................................22

Bus learn

GPIB .........................................30

Caution statements..........................2

Check list

GPIB program.......... .. ..............23

Checking

GPIB communication....... .. ......22

Control function...................... ........21

Controller

Connecting GPIB .....................22

Controls

operation...... .............. .............. ..8

Couplin g

Selecting................ .............. .....18

Cover removal...... .. .............. ............6

Crystal oscill ator

Specification.............................37

Selecting................ .. .. .............. .18

Default se ttings

Specification.............. .. ............ . 38

Delimiters

See Separators

Device clear................................... 22

Device Trigger.................................22

Dimensions ................................... 37

Display

Specification............................. 37

Display hold

Operating the button ................ 16

Specification............................. 38

Display time

Specification............................. 38

Display-hold button

Location......................................4

Earthing

See Grounding

Environmental sp ec if ic ation........... 37

EOI mode

See Output separator

Error codes............................... ..9,20

External reference input

Connection............................ 6,18

Description of function............. 19

Location of connector .................3

Specification............................. 37

Filter

Specification............................. 36

Filter On/Off

Selection.................................. 18

Free run

From GPIB............................... 25

FREQ A/A0

GPIB code........................... .. ...10

Frequency A

From GPIB............................... 24

GPIB code........................... .. .... .. 8

Selecting.....................................8

Specification.............. ............... 35

Frequency A-A0

Specification.. ........ ...... ........ .....35

Frequency A/A0

Specification.. ........ ...... ........ .....35

Frequency B

From GPIB............................... 24

GPIB code ............................. ...10

Selecting........ .............. .............10

Specification.............................35

Function

GPIB code ............................. .... .8

Selecting........ .............. .............. .8

Function selection

GPIB.........................................24

Function -se lector button

Location......................................4

Get

See Trigg ere d

GPIB

Specification................ .. .. .... .. .. .38

GPIB address-selector

Location......................................3

GPIB interface-connector

Location......................................3

GPIB-INTERF ACE

OPERA T ION.. .. ....................... 21 - 34

Grounding...................... .. .... .. .. .... .. .. .6

HF input

Specification.............................36

High speed du mp

GPIB............ .............. .. .. .. .........28

High stability oscillator

Installati on.. .. .. .............. .............20

Hold

display.......................................16

HP controller

GPIB example ................. .. .. .....32

IBM GPIB

GPIB example ................. .. .. .....34

ID?

GPIB........................ .............. .. .22

Identity of the counter...............22

Inaccuracy

Definition...................................36

Input A

Operation......... ........ .......... .......16

PM 6669 - OPERATORS MANUAL

Page 45

Page: 44 INDEX

Specification.............................36

Input B

Operatio n ................................. 16

Specification.............................36

Input separator

GPIB.................. .. ............ .. ....... 23

Input-A BNC-connector

Location........................ ..............4

Input-B BNC-connector

Location......................................4

INSTALLATION......................5 - 7,20

Installing options .............................. 6

LCD-display

Location......................................4

Listener function............ ................. 21

Local............... ................................ 16

LSD displayed................................ 36

Measuring

FREQ A-A0 .................. ........ ....10

FREQ A/A0..................... ..........10

Frequency A......... ........ ........ ......8

Frequency B.............................10

Period....................................... 10

RPM A................ ................ ......10

Time selection.................... .. .. ..12

Totalize ..................................... 10

Width A........... ...... ........ ........ ....12

Measuring time

From GPIB...............................24

GPIB code................................12

Selecting ..................................12

Specification.............................38

Measuring-time select or-b ut ton

Location........................ ..............4

MTCXO

Calibration...................... ............7

Specification........... ..................37

Normal output format

GPIB......................................... 28

OPERATING INSTRUCTIONS......20

Operatin g the controls ..................... 8

Options

Installation .................................. 6

Ordering information................40

Oscillator replacement

See MTCXO Output mode

GPIB......................................... 27

Output separator

GPIB......................................... 24

Parallel poll........ .......................... ..22

Period

From GPIB................................24

Specification..............................35

Period A

GPIB code...................... ...........10

Selecting...................................10

PM 2201

GPIB example...........................33

PM 9604

See GPIB interface

PM 9605

See Battery unit

PM 9606

See Rack mount ki t

PM 9607

See MTCXO

PM 9608B

See HF input

PM 9609

See Carrying case

Power

Requirement s...........................37

Power switch

Location........................ ..............4

Operating.............. .. .............. ......8

Power-inlet socket

Location of...................... ............3

PRODUCT PRESENTATION..... 3 - 4

Programming check-list..................23

Pwidth A

See Width A

Queries

GPIB ................. .... ...... .... ...... ....30

Rack mount kit

Specification..............................39

Rear feet...........................................3

Remote/local...................................22

Removing the cover..........................6

Reset

Operatin g the button.................16

Specification..............................38

Reset button

Location........................ .. ............4

Resolution

Definition...................................36

RPM

Specification....................... .......35

RPM A

GPIB code...................... ...........10

Specification..............................35

Safety................................................2

Screws for removing th e cove r.........3

Sensitivity

Specification....................... .......36

Sensitivity control

Location............ .. .. .. .. .. .. .. .. .. .. .. .. ..4

Separators

Input..........................................23

Output.................... .. .. .. .. .. .. .. .. .. .24

Service request ..............................21

GPIB.........................................26

Short output format

GPIB.........................................28

Slope

From GPIB................................25

See Trigger slope Source and Acc epto r Hand sh ak e .21

SPECIFICATIONS...................35 - 40

Start/Stop Totalize

From GPIB................................25

Operation..................................16

Starting a new measurement

See Reset Status byte

GPIB.........................................26

Store Ao

Specification .............................38

Symbols....... ........ ........ ........ ........ .....2

Talk only switch ..............................22

Talker function ................................21

Tilting support..................... ..............4

Time base

See MTCXO Time out

GPIB.................. .............. .........25

Totalize A

Specifica tion . ........ ...... ........ ......35

Trigger level

Specification .............................36

Trigger level A

Operating the button.................14

Trigger level controls

Location .... ............ ......................4

Trigger slope

From GPIB................................25

Triggered mode

From GPIB................................25

Triggering

From GPIB................................25

Unpacking........................................5

Voltage-range

Location of..................................3

Selecting.....................................5

Warnin g st atements .........................2

Weight ............................................37

Width A

GPIB code ................................12

Specification .............................35

PM 6669 - OPERATORS MANUAL

Page 46

Service Centers 1

Argentina

Coasin S.A. Service Center Virrey del Pino 4071 1430 Capital Federal Buenos Aires Phone:+54-1-552-5248 Fax: +54-1-555-3321

Viditec S.A. Service Center Lacarra 234 Buenos Aires CP 1407 Phone:+54-1-636-1199 Fax: +54-1-636-2185

Australia

Philips Scientiﬁc & Industrial, Pty., Ltd. Service Center Block F, Centrecourt 34 Waterloo Road North Ryde, N.S.W. 2113 Phone:+61-2-888-0423 Fax: +61-2-888-0440

Philips Scientiﬁc & Industrial, Pty., Ltd. Service Center 745 Springvale Road Mulgrave Victoria 3170 Phone:+61-3-574-3666 Fax: +61-3-574-3636

Austria

Fluke Vertriebsges GmbH General Management Südrandstraße 7 P.O. Box 10 A 1232 Wien Phone:+43-1-61410-30 Fax: +43-1-61410-10

Belgium

N.V. Fluke Belgium S.A. Sales & Service Department Langeveldpark - Unit 5 & 7 P. Basteleusstraat 2 - 4 - 6 1600 St. Pieters-Leeuw Phone:+32-2-331-2777 [Ext 218] Fax: +32-2-331-1489

Bolivia

Coasin Bolivia S.R.L. Casilla 7295 La Paz Phone:+591-2-340962 Fax: +591-2-359268

Brazil

Sistest Av. Ataulfo De Paiva 135 S/ 1117 - Leblon

22.449-900 - Rio De Janeiro Rj Phone:+55-21-259-5755 Fax: +55-21-259-5743

Sigtron Instrumentos E. Servicos Ltda Rua Alvaro Rodriques 269 - Brooklin Sao Paulo Sp Phone:+55-11-240-7359 Fax: +55-11-533-3749

Philips Medical Systems, Ltda. Service Center Av. Interlagos North 3493 - Campo Grande 04661-200 Sao Paulo S.P. Phone:+55-11-523-4811 Fax: +55-11-524-4873

Bulgaria

Ac Sophilco Customer Support Services P.O. Box 42 1309 Soﬁa Phone:+359-2-200785 Fax: +359-2-220910

C.S.F.R.

ELSO NA. Berance 2 16200 Praque 6 Phone:+42-2-316-4810 Fax: +42-2-364986

Canada

Fluke Electronics Canada, Inc. Service Center 400 Britannia Road East, Unit #1 Mississauga, Ontario L4Z 1X9 Phone:+1-905-890-7600 Fax: +1-905-890-6866

Chile

Intronica Service Center Instrumentacion Electronica S.A.C.I Guardia Vieja 181 Of. 503 Casilla 16500 Santiago 9 Phone:+56-2-232-3888

China

Fluke Service Center Service Center Room 2111 Scite Tower Jianguomenwai Dajie Beijing 100004 Phone:+86-10-512-3436 Fax: +86-10-512-3437

Colombia

Sistemas E Instrumentacion, Ltda. Service Center Carrera 21, No. 39A-21, Of. 101 Ap. Aereo 29583 Bogota Phone:+57-1-287-5424 Fax: +57-1-287-2248

Costa Rica

Electronic Engineering, S.A. Service Center Carretera De Circunvalacion Sabanilla Av. Novena P.O. Box 4300-1000 San Jose Phone:+506-*-253-3759 Fax: +506-*-225-1286

Croatia

Kaltim - Zagreb Fluke Sales & Service Draga 8 41425 Sveta Jana Phone:+385-41-837115 Fax: +385-41-837237

Denmark

Fluke Danmark A/S Customer Support Services Ejby Industrivej 40 DK 2600 Glostrup Phone:+45-43-44-1900 Fax: +45-43-43-9192

Ecuador

Proteco Coasin Cia., Ltda. Service Center Av. 12 de Octubre 2449 y Orellana P.O. Box 17-03-228-A Quito Phone:+593-2-230283 Fax: +593-2-561980

Egypt

EEMCO 9 Hassan Mazher St. P.O. Box 2009 St. Heliopolis 11361 Cairo Phone:+20-2-4178296 Fax: +20-2-4178296

Fed. Rep. of Germany

Fluke Deutschland Gmbh Customer Support Services Oskar Messter Straáe 18 85737 Ismaning Münich Phone:+49-89-99611-260 Fax: +49-89-99611-270

Fluke Deutschland Gmbh Customer Support Services Meiendorfer Straáe 205 P.O. Box 730 370 22145 Hamburg Phone:+49-40-6797-434 Fax: +49-40-6797-421

Finland

Fluke Finland Oy Customer Support Services Sinikalliontie 3 P.O. Box 151 SF 02631 Espoo Phone:+358-0-61525-620 Fax: +358-0-61525-630

France

Fluke France S.A. Customer Support Services 37, rue Voltaire B.P. 112 93700 Drancy Phone:+33-1-4896-6310 Fax: +33-1-4896-6330

Greece

Philips S.A. H,llenique Fluke Sales & Service Manager 15, 25th March Street P.O. Box 3153 177 78 Tavros Athens Phone:+30-1-4894911 Fax: +30-1-4818594

Hong Kong

Schmidt & Co., Ltd. Service Center 1st Floor 323 Jaffe Road Wanchai Phone:+852-9-223-5623 Fax: +852-*-834-1848

Hungary

MTA-MMSZ Kft. Service / General Manager Etele Ut. 59 - 61 P.O. Box 58 H 1502 Budapest Phone:+361-186-9589 Fax: +361-161-1021

Iceland

Taeknival Hf P.O. Box 8294 Skeifunni 17 128 Reykjavik Phone:+354-1-681665 Fax: +354-1-680664

India

Hinditron Services Pvt., Ltd. Service Center 204-206 Hemkunt Tower 98 Nehru Place New Delhi 110 019 Phone:+91-11-641-3675 Fax: +91-11-642-9118

Hinditron Services Pvt., Ltd. Service Center Emerald House, 5th Floor 114 Sarojini Devi Road Secunderabad 500 003 Phone:+91-40-844033 Fax: +91-40-847585

Hinditron Services Pvt., Ltd. Service Center Castle House, 5th Floor 5/1 A, Hungerford Street Calcutta 700 017 Phone:+91-33-247-9094 Fax:

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2 Service Centers

Hinditron Services Pvt., Ltd. Service Center Hinditron House, 23-B Mahal Industrial Estate Mahakali Caves Road, Andheri East Bombay 400 093 Phone:+91-22-836-4745 Fax: +91-22-836-4682

India

Hinditron Services Pvt., Inc. Service Center 33/44A 8th Main Road Raj Mahal Vilas Extension Bangalore 560 080 Phone:+91-80-334-8266 Fax: +91-80-334-5022

Philips India Limited Service Center Band Box House 254 Dr. Annie Besant Road Bombay 400 025 Phone:+91-22-493-0311 Fax: +91-22-495-0498

Indonesia

P.T. Daeng Brothers Service Center Philips House J/n H.R. Rasuna Said Kav. 3-4 Jakarta 12950 Phone:+62-21-520-1122 Fax: +62-21-520-5189

Israel

R.D.T Electronics Engineer. Ltd. Service Center P.O. Box 58013 Tel Aviv 61580 Phone:+972-3-645-0745 Fax: +972-3-647-8908

Italy

Fluke Italia S.R.L. Customer Support Services Viale Delle Industrie, 11 20090 Vimodrone (MI) Phone:+39-2-268-434-203 Fax: +39-2-250-1645

Japan

Fluke Corporation Japan Service Center Sumitomo Higashi Shinbashi Bldg. 1-1-11 Hamamatsucho Minato-ku, Tokyo 105 Phone:+81-3-3434-0188 Fax: +81-3-3434-0170

Korea

Il Myoung, Inc. Service Center Youngdong P.O. Box 1486 780-46, Yeogsam-Dong Kangnam-Ku Seoul Phone:+82-2-552-8582-4 Fax: +82-2-553-0388

B & P International Co., Ltd. Service Center Geopyung Town A-303 203-1 Nonhyun-Dong Kangnam-ku Seoul 135-010 Phone:+82-02-546-1457 Fax: +82-2-546-1458

Kuwait

Yusuf A. Alghanim & Sons W .L.L. P.O. Box 223 Safat Alghanim Industries Airport Road Shuwaikh 13003 Kuwait Phone:+965-4842988

[Ext 2079]

Fax: +965-4847244

Malaysia

Cnn Sdn. Bhd. Service Center 17D, 2nd Floor Lebuhraya Batu Lancang Taman Seri Damai 11600 Jelutong Penang Phone:+60-4-657-9584 Fax: +60-4-657-0835

Mexico

Metrologia Y Calibraciones Ind. , S.A. De C.V. Industrial S.A. De C.V. Diagonal No. 27-3er Piso Entre Calle De Eugenia Y Ave. Colonia Del Valle Mexico C.P. 03100 Phone:+52-5-682-8040 Fax: +52-5-682-8040

[Ext 404]

New Zealand

Philips Scientiﬁc & Industrial, Pty., Ltd. Service Center Private Bag 41904 St. Lukes, 2 Wagener Place Mt. Albert Auckland 3 Phone:+64-9-849-4160 Fax: +64-9-849-7814

Norway

Fluke Norge A/S Customer Support Services P.O. Box 6054 Etterstad N 0601 Oslo Phone:+47-22-65-3400 Fax: +47-22-65-3407

Pakistan

Philips Electrical Industries Of Pakistan Ltd. Islamic Chamber of Commerce St-2/A, Block 9 KDA Scheme 5, Clifton Karachi 75600 Phone:+92-21-587-4641 Fax: +92-21-577-035

Peru

Importaciones & Representaciones Service Center Jr. Pumacahua 955 Lima 11 Phone:+51-14-235099 Fax: +51-14-310707

Philippines

Spark Electronics Corporation P.O. Box 610, Greenhills Metro Manila 1502 Phone:+63-2-700-621 Fax: +63-2-700-709

Poland

Electronic Instrument Service (E.I.S.) Philips Consumer Service UL. Malechowska 6 60 188 Poznan Phone:+48-61-681998 Fax: +48-61-682256

Portugal

Fluke Ib,rica S.L. Sales & Services Department Campo Grande 35 - 7ob 1700 Lisboa Phone:+351-1-795-1712 Fax: +351-1-795-1713

Romania

RONEXPRIM S.R.L. Customer Support Services Str. Transilvaniei Nr. 24 70778 Bucharest - I Phone:+40-1-6143597 Fax: +40-1-6594468

Russia C.I.S.

Infomedia UL. Petrovsko Razumovsky Proezd. 29 103287 Moscow Phone:+7-095-2123833 Fax: +7-095-2123838

Saudi Arabia

A. Rajab & Silsilah Co. Sales & Service Department P.O. Box 203 21411 Jeddah Phone:+966-2-6610006 Fax: +966-2-6610558

Singapore

Fluke Singapore Pte., Ltd. Service Center #27-03 PSA Building 460 Alexandra Road Singapore 0511 Phone:+65-*-276-5161 Fax: +65-*-276-5759

South Africa

Spescom Measuregraph Pty., Ltd. Service Center SPESCOM Park Crn. Alexandra Rd. & Second St. Halfway House Midrand 1685 Phone:+27-11-315-0757 Fax: +27-11-805-1193

Spain

Fluke Ib,rica S.L. Customer Support Services Centro Empresarial Euronova C/Ronda De Poniente, 8 28760 - Tres Cantos Madrid Phone:+34-1-804-2301 Fax: +34-1-804-2496

Sweden

Fluke Sverige AB Customer Support Services P.O. Box 61 S 164 94 Kista Phone:+46-8-751-0235 Fax: +46-8-751-0480

Switzerland

Fluke Switzerland A.G. Customer Support Services Rütistrasse 28 8952 Schlieren Phone:+41-1-730-3310 Fax: +41-1-730-3720

Taiwan, R.O.C.

Schmidt Scientiﬁc Taiwan, Ltd. Service Center 5th Floor, No. 178, Section 2 Min Sheng East Road Taipei Phone:+886-2-501-3468 Fax: +886-2-502-9692

Thailand

Measuretronix Ltd. Service Center 2102/31 Ramkamhang Road Bangkok 10240 Phone:+66-2-375-2733 Fax: +66-2-374-9965

The Netherlands

Fluke Nederland B.V. Customer Support Services Science Park Eindhoven 5108 5692 EC Son Phone:+31-40-644310 Fax: +31-40-644321

Turkey

Pestas Prof. Elektr. Sistemler Tic. ve San. A.S. Selcuklar Caddesi Meydan Apt. No. 49 Daire 23 Akatlar 80630 Istanbul Phone:+90-212-2827838 Fax: +90-212-2827839

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Service Centers 3

U.A.E.

Haris Al-Afaq Ltd. P.O. Box 8141 Dubai Phone:+971-4-283623 Fax: +971-4-281285

U.S.A.

Fluke Corporation Service Center - Palatine 1150 W. Euclid Avenue Palatine, IL 60067 Phone:+1-708-705-0500 Fax: +1-708-705-9989 E-Mail:larry@wz.ﬂuke.com

Fluke Corporation Service Center - Paramus W. 75 Century Road Paramus, NJ 07652-0930 Phone:+1-201-599-9500 Fax: +1-201-599-2093 E-Mail:gleckler@wz.ﬂuke.com

Fluke Corporation Service Center - Everett Building #4 1420 - 75th St. S.W. Everett, WA 98203 Phone:+1-206-356-5560 Fax: +1-206-356-6390 E-Mail:ed@wz.ﬂuke.com

Fluke Corporation Service Center - Irvine 16815 Von Karman Ave. Suite 110 Irvine, CA 92714 Phone:+1-714-863-9031 Fax: +1-714-757-7556 E-Mail:miker@wz.ﬂuke.com

Fluke Corporation Service Center 46610 Landing Parkway Fremont, CA 94538 Phone:+1-510-651-5112 Fax: +1-510-651-4962 E-Mail:gbondy@wz.ﬂuke.com

Fluke Corporation Service Center - Dallas 2104 Hutton Drive Suite 112 Carrollton, TX 75006 Phone:+1-214-406-1000 Fax: +1-214-406-1072 E-Mail:oldman@wz.ﬂuke.com

Fluke Corporation Service Center - Orlando 550 S. North Lake Blvd. Altamonte Springs, FL 32701-5227 Phone:+1-407-331-2929 Fax: +1-407-331-7710 E-Mail: wwitko@wz.ﬂuke.com

United Kingdom

Fluke United Kingdom Ltd. Customer Support Services Colonial Way Watford Hertfordshire WD2 4TT Phone:+44-1923-240511 Fax: +44-1923-225067 E-Mail:kgarner@uk.ﬂuke.nl

Uruguay

Coasin Uruguaya, S.A. Service Center Casilla de Correo 1400 Libertad 2529 Montevideo Phone:+598-2-789015 Fax: +598-2-492199

Venezuela

Coasin C.A. Service Center Calle 9 Con Calle 4, Edif. Edinurbi Apartado de Correos NR-70.136 Los Ruices Caracas 1070-A Phone:+58-2-241-0309 Fax: +58-2-241-1939

Vietnam

Schmidt-Vietnam Co., Ltd. 6/Fl. Pedalogical College Bldg. Dich Vong, KM 8 Highway 32 Tu Liem Hanoi Phone:+84-4-346186 Fax: +84-4-346-188

Countries not listed

For Eastern Europe And Middle East Export Sales Science Park Eindhoven 5110 5692 EC Son The Netherlands Phone:+31-40-644265 Fax: +31-40-644260

All other countries

Fluke Corporation P.O. Box 9090 Mail Stop 268C Everett, WA 98206-9090

950427

Fluke PM6669 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual