Fluke PM6685 Getting Started Download | Manualshive

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Summary of Contents for PM6685

Page 1: ...Connect and Go FLUKE PMS6SS FLUKE ...

Page 2: ...ion 2 Getting familiar with the front panel 4 Exercises 6 Measuring 7 Trying the front panel keys 11 Aux Menu 16 Is it really this easy 20 4822 872 20032 Rev 5 February 2002 Pendulum Instruments Sweden Printed In Sweden ...

Page 3: ... oscilla tor an extremely accurate atomic dock The PM6685R ishoused in a bigger cabinet than PM6685 but the opera tions of both instruments are identical This manual gives a brief description of some functions and keys of your new in strument to get you started Frequency Measurements the easy way Making measurements is very easy just connect and go Page 2 ...

Page 4: ... signal GO If IL FREQA n n n n g h uuuu MW I auto i TRIG EVEL A 1 Result Signal level Continue to read and exercise if you want to know more about the possibilities with this PM6685 300 MHz Fre quency Counter The 15 to 25 minutes it takes are well spent When you want deeper knowledge the Operators Manual Is there to help you Page 3 ...

Page 5: ...itional ad vanced functionsv MEASURING TIME Controls the rate i and resplutlon of FLUKE INPUT SETTING KEYS Use these keys to set the irri V pedance trigger level or sen sitivity for the A input or to select a lowpass filter The current state of each setting is shown on the display right aboye the corresponding key The C input is fully automatic and no settings are required AUTO KEY A press on the ...

Page 6: ...JE A SIAi S TQ l REMO E EXT REF CHECK FIITER 150Mii 1 03 AUTO LEVEL A SENSITIVITY A i SRQ LOBAT OVERLOAD HOLD NULL OFFSET TRIG fSS S liSM BiS S S S StS 8 8 J BAR GRAPH INDICATOR FOR INPUT LEVEL OR SENSITIVITY The bar graph on the display shows the signal level or sensitivity When AUTO is enabled the bar graph shows the signal level and when disabled i The display on PM6685 pm6685R Page 5 ...

Page 7: ... a BNC ca ssf s s functions ISet up the Generator i FreguencYL 12 kHz Sauare _ I 50 I A hand in the margin points out the exercises Basic Startup of the Counter ing from a known state is always easier To do so just the power off and then on again recalls sing local preset and then ENTER also recalls 14 r rvt inOC ...

Page 8: ...red and Auto sets the hysteresis band between 1 3 and 2 3 You ll soon find that it s much easier and more accurate to measure with the AUTO function on than to do manual set tings There are just a few exceptions that needs manual set tings AM moduiated signals extremely noisy signals non repetitive signals and signals with frequencies below 50 Hz Level meter I LB a A I Ifllllllll lasmv IV lOVlrnis...

Page 9: ...they get a dc shift after the ac coupling capacitor When the duty factor exceeds a certaih factor the input will stop triggering unless the trigger window is offset to compensate for the dc shift of the signal The grayed fields show the position of the hysteresis band and the circles are trigger points reset points j 1 ri riL 1 ac coupling capacitor Trigger level indica tion on the display Dc shif...

Page 10: ...d then turn it off again by pressing one of the SENS keys This way you freeze the current waveform selection and sensitivity selected by AUTO Pressing SENS again will increase decrease the sensitivity around the freezed waveform compensation When measuring frequency AUTO sets the sensitivity to 1 3 of the input signal level to reject noise When measuring pulse width AUTO sets the sensitivity as hi...

Page 11: ...Press the FILTER key to toggle the built in 100 kHz LP fil ter The filter segment is on when the filter is being used Page 10 ...

Page 12: ...g reference value etc can be changed in two ways in steps of 1 2 5 with coarse adjustment or digit by digit with fine adjustment Coarse adjustment COARSE W3JUSTMENT T II j pnn 3 C LI U r r r Use the FUNCTION rocker key or the DATA ENTRY keys to step up or down in steps of 1 2 5 then confirm your se lection with ENTER Changing to Fine adjustment Press the SENS key to enter fine adjustment To return...

Page 13: ...lution in the measure ment Increasing the measuring time gives more digits Press the iWEAS TIME key and use the FUNCTION rocker key to change the measuring time in steps of 1 2 5 as coarse adjustment Press the WIEAS TIME key again to re turn to measuring The measuring time can also be fine adjusted as described above Turn on SINGLE The result is now from a single measure ment cycle and the measuri...

Page 14: ...t to blank out on the display I i _ J SH 3B 1 6 H 543 6 OI 54 3 hZ II i 54 6 HZ 1x II I q S Hz X 6 Hz 54 3 j 6 HZ CHECK The CHECK key enables a seif test of the measuring func tions Press the CHECK key to connect internally the 10 MHz reference signal to the logic circuit Press the FUNCTION rocker key to scroll through all measuring func tions Note that if you select FREQ C when check is on the mo...

Page 15: ...Hz time base Since no reference signal is connected the display will show 0 Press the NULL key to store the current result as a con stant and switch on the nulling function The counter will now show the results as a deviation from the stored con stant Read about how to change the null value via the AUX MENU on page 17 in this manual Page 14 ...

Page 16: ... function lets you totalize count the number of trigger events on channel A Use the DISPL HOLD key to start and stop totalization and the MEAS RESTART key to reset the displayed result Try using the counter as a stopwatch Turn on CHECK Select TOT A MAN using the FUNCTION key Press DISPL HOLD to start the stopwatch The counter will now count to 10000000 in one second Press DISPL HOLD to stop the st...

Page 17: ...Test Program Version AUX MFKJl Regard the AUX MENU as a rotary switch Press the AUX MENU key and then use the FUNCTION rocker to turn the rotary switch When the display shows the function you want confirm your selection by pressing ENTER key To escape without selecting any auxiliary function press the MEAS RESTART key Some selections will take you to a submenu with more se lections or parameter se...

Page 18: ...NULL key press ENTER if you want to switch on nulling with this value FINE ADJUSTMENT Os i digit nnnnnnnnn 3 UU UUUiUUUU increase Decrease digit value OK To change the value press the SENS arrow keys to select position for fine adjustment Press the DATA ENTRY keys to change digit value Confirm changes with ENTER or escape without chang ing the nulling value by pressing the MEAS RESTART key You can...

Page 19: ... of 19 memories UporDn Look for Up or Dn Press the AUX MENU key to enter the menu Press the DATA ENTRY keys to select SAVE Press the ENTER key Select a number for Memory for example 4 by press ing the DATA ENTRY arrow keys Confirm with ENTER Page 18 ...

Page 20: ...ECALL Press the ENTER key Select a number to recall in this example 4 by press ing the DATA ENTRY arrow keys Confirm with the ENTER key The stored front panel setting is now recalled and the mem ory annunciator is shown on the display Press STAND BY to turn off the counter Press ON to turn it on again Note that the memory annunciator is on if you turn off the counter when a memory setting is activ...

Page 21: ...retty familiar with the main functions of the PM6685 but don t stop here Pick up the operators and programming manuals and continue to dig into the many features You will find lots of interesting timesaving and valuable functions Page 20 ...

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