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Manual Agilent Technologies Agilent 35670A

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  • Agilent Technologies Agilent 35670A - page 1

    Supplemental Operator’s Guide for the Agilent 35670A Dynamic Signal Analyzer By: David Forrest Seattle Sound and Vibration, inc. Print Date: December, 2000 ã Seattle Sound and Vibration, inc. 1996, 2000. All rights res erved. Agilent Part number 35670-90059 Special Permission Amoco Corporation and Agilent Technologies, Inc ar e granted full edit ...

  • Agilent Technologies Agilent 35670A - page 2

    AGILENT 35670A Supplemental Operator’s Guide SECTION 1 : TURNING ON THE AGILENT 35670A ....................................................................................... ... 1 SECTION 2 : M EASUREMENT STATE AFTER TURN-ON ............................................................................... 2 SECTION 3 : M EASURING WITH T RANSDUCERS ...

  • Agilent Technologies Agilent 35670A - page 3

    AGILENT 35670A Supplemental Operator’s Guide SECTION 11 : MODAL TESTING USING A HAMMER AND ACCELEROMETER ................................. 25 S ETTING U P THE T RANSDU CER P AR AM ETE RS ......................................................................................................... 25 S ETTING U P I NPUT R AN GE ........................ ...

  • Agilent Technologies Agilent 35670A - page 4

    AGILENT 35670A Supplemental Operator’s Guide SECTION 21 : USING AN EXTERNAL TRIGGER FOR TIME AVERAGING ........................................... 60 S PECIFY U SER L EVEL S FOR T RI GG ERING ................................................................................................................ 60 C HAR AC TER IZ IN G THE E XTERNAL T RI ...

  • Agilent Technologies Agilent 35670A - page 5

    AGILENT 35670A Supplemental Operator’s Guide 1 Section 1 : Turning On the A GILENT 35670 A The entire turn-on procedure for the AGILENT 35670A takes 40 se conds. In that time the analyzer completes a hardware s elf-test, boots its operating system, completes a front end self-calibration and a utoranges all input channels. The default measur ement ...

  • Agilent Technologies Agilent 35670A - page 6

    AGILENT 35670A Supplemental Operator’s Guide 2 Section 2 : Measurement St ate A f ter Turn-on Inst Mode FFT Channels 2 Measurement Source INPUT Meas Data Data A PWR SPEC1 Data B PWR SPEC2 Data C TIME1 Data D TIME2 Trac Coord Coord A MAG-LOG Coord B MAG-LOG Coord C REAL Coord D REAL Freq Start 0 Hz Stop 51.2 kHz Center 25.6 kHz Span 51.2 kHz Rec L ...

  • Agilent Technologies Agilent 35670A - page 7

    AGILENT 35670A Supplemental Operator’s Guide 3 Section 3 : Measuring with Transduc ers The AGILENT 35670A can be used with a broad range of transdu cers. Transducers can use an external pre amplifier to convert the raw signal into a voltage that is compatible with the AGILENT 35670A. Some transducers have internal ci rcuitry which provides preamp ...

  • Agilent Technologies Agilent 35670A - page 8

    AGILENT 35670A Supplemental Operator’s Guide 4 For example, if an acceler omet er has am inter nal sensitivity of 25 pC/g, and a charge amplifier ha s a gain setting of 10 mV/pC, then the resulting tran sducer sensitivity is 250 mV/g. However is the gain setting on the charge amplifier is ch anged to 1 mV/pC, then the resulting sensitivity would ...

  • Agilent Technologies Agilent 35670A - page 9

    AGILENT 35670A Supplemental Operator’s Guide 5 Section 4 : Measuring a Singl e Channel Power Spectrum - Displacem ent This section contains proc edu res for setting up and measuring a sing le channel power spectrum of displacement using an AG ILENT 35670A Dynamic Signal Analyzer. Included are st eps to select single channel oper ation, set up tra ...

  • Agilent Technologies Agilent 35670A - page 10

    AGILENT 35670A Supplemental Operator’s Guide 6 Any frequenc y below 51.2 kHz may of course be ent ered, however the anal yzer will select the lowest span that contains the desired frequ ency. For ex ample, if 1200 Hz is entered, the anal y z er is switched to a span of 1600 Hz . * Available in sing le-channel mode when anti-alias f ilter is turne ...

  • Agilent Technologies Agilent 35670A - page 11

    AGILENT 35670A Supplemental Operator’s Guide 7 Input CH1 Rng: 501.7819 mVpk CH2 Rng: 631.706 mVpk CH3 Rng: 2.5149 Vpk CH4 Rng: 2.5149 Vpk Date: 10-02-96 Time: 08:42:00 PM A: CH1 Pwr Spec X:160 Hz Y:169.558 mVrms 0Hz 800Hz 1 Vrms 1 uVrms LogMag 6 decades Quantifying Power Spectrum Result s Use the marker knob to read the amplitude at an y measured ...

  • Agilent Technologies Agilent 35670A - page 12

    AGILENT 35670A Supplemental Operator’s Guide 8 Section 5 : Improving Measurement Results Frequency Zooming to Increase Resolution The AGILENT 35670A has the abilit y to zoom in on a sig nal to show det ail with very fine resolution. After choosing a cent er frequenc y, it is possible to decrease the span and therefore incre ase the resolution all ...

  • Agilent Technologies Agilent 35670A - page 13

    AGILENT 35670A Supplemental Operator’s Guide 9 If continuous real-time measurements over a long du ration are required, and absolutely no overload conditions are desired, then a fix ed input range can be set that is greater than an y si gnal expected. During periods of low si gnal level, dynamic range will not be optimal, however the entire measu ...

  • Agilent Technologies Agilent 35670A - page 14

    AGILENT 35670A Supplemental Operator’s Guide 10 • Systm Util Date: 10-02-96 Time: 08:40 PM Date: 01-02-04 Time: 12:44:00 PM A: CH1 Pwr Spec X:160 Hz Y:174.015 mVrms 0Hz 800Hz AVG: 5 1 Vrms 1 uVrms LogMag 6 decades ...

  • Agilent Technologies Agilent 35670A - page 15

    AGILENT 35670A Supplemental Operator’s Guide 11 Section 6 : Measuring a Singl e Channel Time Wav e form This section contains proc edu res for setting up and measuring a single channel time waveform using an AGILENT 35670A D ynamic Signal Anal y ze r. Included are steps to select single channel operation, set up the trac e time length, and set up ...

  • Agilent Technologies Agilent 35670A - page 16

    AGILENT 35670A Supplemental Operator’s Guide 12 Selecting Time Record Length The default time record length at a fr equenc y span of 51.2 kHz is only 7.8 ms, which is usually not e nough time to capture a mechanical event or observe a transducer ’s time domain signal. To increase the time record len gth to 0.25 s, perform the following steps: ? ...

  • Agilent Technologies Agilent 35670A - page 17

    AGILENT 35670A Supplemental Operator’s Guide 13 • Press the [ARM] so ftkey (F9) again. Event Triggering The AGILENT 35670A has the abilit y to trigger the acquisition of a time waveform based on the slope and level of the measured si gnal. To set up triggering properl y, the polarity of the measured pulse must be known in advance: will the even ...

  • Agilent Technologies Agilent 35670A - page 18

    AGILENT 35670A Supplemental Operator’s Guide 14 Input CH1 Rng: 1.0012 Vpk CH2 Rng: 631.706 mVpk CH3 Rng: 2.5149 Vpk CH4 Rng: 2.5149 Vpk Date: 10-02-96 Time: 08:47:00 PM A: CH1 Time X:38.0859 ms Y:1.06837 V -9.7656ms 489.7461ms 2.5 V -2.5 V Real 500 mV /div Quantifying Time Trac e Results Use the marker knob to read the amplitude at an y time duri ...

  • Agilent Technologies Agilent 35670A - page 19

    AGILENT 35670A Supplemental Operator’s Guide 15 Section 7 : Measuring Dual Channel Spect ra This section contains proc edu res for setting up and measuring a dual channel spectrum using an AGILENT 35670A D ynamic Sig nal Anal y z er. Procedures are similar to those in the se ction “Measuring Single Channe l Spectrum,” however display setup an ...

  • Agilent Technologies Agilent 35670A - page 20

    AGILENT 35670A Supplemental Operator’s Guide 16 • Press the [Meas Data] hardkey. • Press the [CHANNEL 1 2 34 ] soft key (F1) until 2 is highlig hted. • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. Note: many of these ke ystrokes are not necessary if performed in the given o rder becau ...

  • Agilent Technologies Agilent 35670A - page 21

    AGILENT 35670A Supplemental Operator’s Guide 17 Use the marker knob to read the amplitude at an y measured fr equency for Channel 1 in Trace A. To set up the marker for Channel 2 in Trace B, • Press the [Active T race] hardkey. • Press the [B] so ftkey (F2) . • Press the [Marker] hardkey. • To ggle the [MARKER ON OFF] soft key (F1) until ...

  • Agilent Technologies Agilent 35670A - page 22

    AGILENT 35670A Supplemental Operator’s Guide 18 Section 8 : Improving Du al Channel Measurem ent Results Maximizing Dynamic Range Autoranging to ma ximize the dy namic range of measureme nts in the AGILENT 35670A can function on all channels simultaneousl y. Therefore all capability previously mentioned for single-channel front-end r anging is av ...

  • Agilent Technologies Agilent 35670A - page 23

    AGILENT 35670A Supplemental Operator’s Guide 19 Avg [FFT] Type: RMS Number: 10 Update Rt: 5 Overlap: 0 % Date: 10-02-96 Time: 08:51:00 PM X:60 Hz Y:95.0385 mVrms 0Hz 800Hz AVG: 10 A: CH1 Pwr Spec X:60 Hz Y:112.185 mVrms 1 Vrms 10 uVrms LogMag 5 decades B: CH2 Pwr Spec 100 mVrms 10 uVrms LogMag 4 decades 0Hz 800Hz AVG: 10 ...

  • Agilent Technologies Agilent 35670A - page 24

    AGILENT 35670A Supplemental Operator’s Guide 20 Section 9 : Measuring Dual Channel Time Waveforms This section contains pr ocedures for setting up and measuring a sing le channel time waveform using an AGILENT 35670A D ynamic Signal Anal y ze r. Included are steps to select single channel operation, set up the trac e time length, and set up trigg ...

  • Agilent Technologies Agilent 35670A - page 25

    AGILENT 35670A Supplemental Operator’s Guide 21 • Press the [CHANNEL 1 234 ] soft key (F1) until 1 is highlig hted. • Press the [TIME CHANNEL 1] so ftkey (F5) • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. . • Press the [Active T race] hardkey. • Press the [B] so ftkey (F1) • Pr ...

  • Agilent Technologies Agilent 35670A - page 26

    AGILENT 35670A Supplemental Operator’s Guide 22 Then set up trigger parameters (for a positive e vent, positive slope) as follows: • Press the [TRIGGER SETUP] so ftkey (F6) • Press the [CHANNEL LEVEL] so ftkey (F1) • Enter 5 then p ress the [PERCENT (%)] so ftkey (F4 ) • Press the [SLOPE POS NEG] so ftkey (F5) until POS is highlighted. Tr ...

  • Agilent Technologies Agilent 35670A - page 27

    AGILENT 35670A Supplemental Operator’s Guide 23 Using Markers with Dual Channel T ime Measurements Compare the time trace of Channel 1 with Channe l 2 using two techniques: peak tracking and coupled mark ers. With peak tracking active on both chan nels, it is possible to measure an event with two chann els and easil y compare p eak amplit udes. S ...

  • Agilent Technologies Agilent 35670A - page 28

    AGILENT 35670A Supplemental Operator’s Guide 24 • Press the [Active T race] hardkey. • Press the [ ABCD ] softkey (F 7). • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. . • Press the [Active T race] hardkey. • Press the [A] so ftkey (F1) . The default QUAD displa y shows C hannel 1 ...

  • Agilent Technologies Agilent 35670A - page 29

    AGILENT 35670A Supplemental Operator’s Guide 25 Section 11 : Modal Testing Using a Hammer and A ccelerometer Hammer testing is often the easiest and quickest technique fo r measuring frequenc y response functions used in modal anal ysis. Instructions for using a hammer with a force transducer and an accelerometer to measure frequenc y response fu ...

  • Agilent Technologies Agilent 35670A - page 30

    AGILENT 35670A Supplemental Operator’s Guide 26 • To ggle the [XDCR UNIT ON OFF] soft k ey (F 4) un t il ON is highlighted. • Press the [XDCR UNIT LABEL] sof tk ey (F7). • Sel ect the [g] softk ey (F2). Setting Up Input Range Use CH* AUTO UP ONLY as t he autoran ge routine as follows: • Press the [Input] hardkey. • Pr ess [ALL CHANNELS] ...

  • Agilent Technologies Agilent 35670A - page 31

    AGILENT 35670A Supplemental Operator’s Guide 27 • Press the [TRIGGER SETUP] so ftkey (F6) • Press the [ALL CHANNELS] so ftkey (F8) • Press the [CHANNEL * DELAY] so ftkey (F9) • Enter - .01 then press the [S] softk ey (F1) Now to check th at the trigger p arameters ar e correct, • Press the yellow [Start] hard k ey. The anal y z er shoul ...

  • Agilent Technologies Agilent 35670A - page 32

    AGILENT 35670A Supplemental Operator’s Guide 28 Window [FFT] Type: Force/Expo Width: 15 ms Decay: 30 ms Date: 10-02-96 Time: 09:02:00 PM -9.766ms 115.112ms X:488.281 us Y:-74.925 mV X:488.281 us Y:-53.234 mV -9.766ms 115.112ms X:488.281 us Y:48.1237 mV -9.766ms 115.112ms A: CH1 Time B: CH2 Time X:488.281 us Y:67.1154 mV 80 mV -20 mV Real 300 mV - ...

  • Agilent Technologies Agilent 35670A - page 33

    AGILENT 35670A Supplemental Operator’s Guide 29 window time constant of 62.5 ms. To set up these Force/Response windows, follow these steps: • Press the [Window] hardkey. • Press the [FORCE EXPO] so ftkey (F4) . • Press the [FORCE EXPO SETUP] so ftkey (F6). • Press the [FORCE WIDTH] so ftkey (F6) . • Ent er 36 and then press the [mS] so ...

  • Agilent Technologies Agilent 35670A - page 34

    AGILENT 35670A Supplemental Operator’s Guide 30 significantl y. Ten averages may take longer, but ma y be necessar y when testing difficult, non-linear structures. To set up five ave rages, follow these steps: • Press the [A vg ] hardkey. • Toggle the [AVERAGE ON OFF] softk e y (F1 ) until ON is hi g hlighted . • Press the [NUMBER AVERAGES] ...

  • Agilent Technologies Agilent 35670A - page 35

    AGILENT 35670A Supplemental Operator’s Guide 31 Changing Frequency Span Changing frequenc y span or resolution affects three important parameters in hammer testing which must be changed to correspond to the new time record len gth: Trigger Delay, Force Window Wi dth, and Response Window Deca y Time. The following relationship between th e paramet ...

  • Agilent Technologies Agilent 35670A - page 36

    AGILENT 35670A Supplemental Operator’s Guide 32 Section 12 : Hammer Test Setup Without a Force Transducer Hammer testing for modal anal ysis without a force transducer can yield usable results if an ac celerometer is pl aced on the hamm er and used to trigger t he measurement. Although frequenc y response functions acquired with this technique wi ...

  • Agilent Technologies Agilent 35670A - page 37

    AGILENT 35670A Supplemental Operator’s Guide 33 Section 13 : Order Domain Result s in List Mode Machinery run-ups and run -downs can be anal y z ed with order anal ysis, which is spectral a n alysis normalized to RPM. Re sults can be simplified by examining only a list of amplitude versus order, so that onl y desir ed results are examined. To set ...

  • Agilent Technologies Agilent 35670A - page 38

    AGILENT 35670A Supplemental Operator’s Guide 34 • Ent er 4 and press t he [ ORDERS ] so ftkey (F1 ). • Ent er 5 and press t he [ ORDERS ] so ftkey (F1 ). • Ent er 6 and press t he [ ORDERS ] so ftkey (F1 ). • Ent er 7 and press t he [ ORDERS ] so ftkey (F1 ). • Ent er 8 and press t he [ ORDERS ] so ftkey (F1 ). • Ent er 9 and press t ...

  • Agilent Technologies Agilent 35670A - page 39

    AGILENT 35670A Supplemental Operator’s Guide 35 Section 14 : Comparing Two-Channel Real-Time Spectra w ith Recalled Data Compare two c hannels of real-time data with spec tra stored in reg isters using the UPPR/L OWR FRNT/BACK display format of the AGILENT 35670A. Note th at the real-time data should be measured with the same frequenc y and resol ...

  • Agilent Technologies Agilent 35670A - page 40

    AGILENT 35670A Supplemental Operator’s Guide 36 • Press the [MORE CHOICES] so ftkey (F9) . • Press the [DATA REGISTER] so ftkey (F8) . • Press the [D2] so ftkey (F2) . Recalling th e Spectra from D isk Use data registers D1 and D2 to contain the spe ctra used for comp arison. D1 is compared to Chann el 1 real-t ime data, and D2 is compared ...

  • Agilent Technologies Agilent 35670A - page 41

    AGILENT 35670A Supplemental Operator’s Guide 37 • Press the [Save/Recall] hardkey. • Press the [RECALL DATA] so ftkey (F4) . • Press the [RCL TRACE AND SCALE] so ftkey (F1). • Press the [FROM FILE INTO D1] so ftkey (F1). • Press the [CLEAR ENTRY] so ftkey (F9) . • Enter COMPARE1.DAT and press the [ ENTER] soft key (F1) . Data fr om th ...

  • Agilent Technologies Agilent 35670A - page 42

    AGILENT 35670A Supplemental Operator’s Guide 38 Scaling fo r traces A and B are now i dentical. To ac complish t he same trace s caling for C and D, follow thes e steps: • Press the [Active T race] hardkey. • Press the [C D] so ftkey (F1) . • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighte ...

  • Agilent Technologies Agilent 35670A - page 43

    AGILENT 35670A Supplemental Operator’s Guide 39 Section 15 : W aterfal l Spectra at Time Intervals Waterfalls on the AGILENT 35670A can be used to examine and compar e spectra at fixed intervals of time. This is especially useful when measurin g non-stationary signals from machiner y, such as during run-ups and run -downs. To see a waterf all dis ...

  • Agilent Technologies Agilent 35670A - page 44

    AGILENT 35670A Supplemental Operator’s Guide 40 • Press the [Disp Format] hardke y. • Press the [WATERFALL SETUP] sof tk ey (F8). • Toggle the [WATERFALL ON OFF] softk e y (F1 ) until ON is highlighted. The default number of waterf all steps is 15, which means only 15 spectra are kept in memory and as new data is taken, the oldest spectra i ...

  • Agilent Technologies Agilent 35670A - page 45

    AGILENT 35670A Supplemental Operator’s Guide 41 This makes the w aterfa ll trace ac tive. • Press the [Marke r Fctn] ha rdk ey. • Press the [WATERFALL MARKERS] so ftkey (F5). The SLICE SELECT softkey will be active. Use the mark er knob to move the cursor to the freque n cy of intere st. • Press the [SAVE AND DISP DATA] so ftkey (F5). This ...

  • Agilent Technologies Agilent 35670A - page 46

    AGILENT 35670A Supplemental Operator’s Guide 42 Section 16 : W aterfal l Spectra at RPM Int ervals Spectra can be acquired at fix ed RPM intervals with RPM STEP ARM. This feature allows spectra to be taken at uniform RPM intervals even durin g erratic run-ups. Setting Up the Tachometer Connect the tachometer signal to the TACH BNC connector on th ...

  • Agilent Technologies Agilent 35670A - page 47

    AGILENT 35670A Supplemental Operator’s Guide 43 • Pr ess 50 then the [RPM] sof tk ey (F1) . Then specif y t he total number of spe ctra to be coll ected (15): • Press the [A ct ive Trace] har dkey. • Sel ect the [B] softkey (F 2). • Press the [Disp Format] hardke y. • Sel ect the [WATERFALL SETUP] softk ey (F8). • Sel ect the [WATERFA ...

  • Agilent Technologies Agilent 35670A - page 48

    AGILENT 35670A Supplemental Operator’s Guide 44 Marker Fcn [Watrfall] Trace: B Save Reg: D2 Base Supr: 0 % Height: 57 % Date: 07-24-96 Time: 11:31:00 PM Slice:122 Hz Trace:4.311 kRPM 0Hz 800Hz A: D2 Pwr Spec B: CH1 Pwr Spec 1 Vrms 100 u LogMag 4 decades 0Hz 800Hz 1 Vrms LogMag 100 uVrms 4.883 kRPM 3.383 kRPM A Proper l y Scaled, RPM Triggere d Wa ...

  • Agilent Technologies Agilent 35670A - page 49

    AGILENT 35670A Supplemental Operator’s Guide 45 Section 17 : Two-Channel A bsolute and Differential Amplitude Measurement Measuring the relative motion between points on a machine can provide info rmation regarding clear ances and forces. Th ese measurement s may also demonst rate a susceptibility of a machine to a particula r mode of vibration. ...

  • Agilent Technologies Agilent 35670A - page 50

    AGILENT 35670A Supplemental Operator’s Guide 46 • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. . • Press the [Active T race] hardkey. • Press the [B] so ftkey (F1) • Press the [Meas Data] hardkey. • Press the [CHANNEL 1 2 34 ] soft key (F1) until 2 is highlig hted. • Press the [TIME CHANNEL 2] so ftkey (F5) ? ...

  • Agilent Technologies Agilent 35670A - page 51

    AGILENT 35670A Supplemental Operator’s Guide 47 • dif ference in motion between Channel 1 and Channel 2 in mils peak-to- peak • phase angle between the two channels. Set up the AGILENT 35670A • Press the green [Preset] hardk ey • Press [ DO PRESET ] so ftkey (F1 ) . • Press the [Pause/Cont] hardkey if desired. • Press the [Freq] ha rd ...

  • Agilent Technologies Agilent 35670A - page 52

    AGILENT 35670A Supplemental Operator’s Guide 48 • To ggle the [CHANNEL 1 2 34 ] softkey (F1) until 2 is highlighted. • Press the [ LIN SPEC CHANNEL 2 ] s oftk ey (F3) . • Press the [ ENTER ] s oftk ey (F7) . Set up display • Press the [Disp Forma t] ha rdke y. • Press the [QUAD] so ftkey (F6) . After a instrument pr eset the QUAD displ ...

  • Agilent Technologies Agilent 35670A - page 53

    AGILENT 35670A Supplemental Operator’s Guide 49 • Press the [Active T race] hardkey again. • Press the [D] so ftkey (F2) . • Press the [Trace Coord] har dke y. • Press the [PHASE] so ftkey (F4) . Start measurem ent • Press the yellow [Start] hard k ey. The AGILENT 35670A will now measure motion of Channel 1 and 2 and show the results in ...

  • Agilent Technologies Agilent 35670A - page 54

    AGILENT 35670A Supplemental Operator’s Guide 50 Section 18 : Measuring Frequency Response with the AGILENT 35670A Frequency response functions characteriz e the behavior of s ystems to external stimuli. For mechanical s ystems, the stimulus can be a t ransient force su ch as an impact from a hammer, or a broadband stimulus, such as r andom excita ...

  • Agilent Technologies Agilent 35670A - page 55

    AGILENT 35670A Supplemental Operator’s Guide 51 • At tach one end o f sting er to sha k er and one end t o force transducer • Connect amplifier output to shaker • Connect amplifier input to AGILENT 35670A source Connect the transduc ers • Connect force transducer to Channel 1 • Connect accelerometer to Channel 2 Preset the AGILENT 35670 ...

  • Agilent Technologies Agilent 35670A - page 56

    AGILENT 35670A Supplemental Operator’s Guide 52 Choose measurement paramet ers • Press the [Freq] ha rdk ey • Ent er 800 and then pr ess the [ Hz ] soft key (F2) • Press the [A vg ] hardkey. • Press the [NUMBER AVERAGES] so ftkey (F2), enter 4, then press the [ENTER] soft key (F1 ). • T urn on av eraging by pressing the [AVERAGE ON OFF] ...

  • Agilent Technologies Agilent 35670A - page 57

    AGILENT 35670A Supplemental Operator’s Guide 53 • T urn up the level control on the sha k er amplifier until the excitation is noticeable, but does not buzz or rattle. If buzz ing or rattling is heard, then either the level is too high or the structure is loose and m ust be quie ted. • Press the [MORE CHOICES] so ftkey (F9) • Press the [BUR ...

  • Agilent Technologies Agilent 35670A - page 58

    AGILENT 35670A Supplemental Operator’s Guide 54 • Press the [Disp Forma t] ha rdke y. • Press the [SINGLE] soft key (F1) • Press the [Active T race] hardkey. • Press the [A] softkey (F1). • Press the [Trace Coord] har dke y. • Press the [MORE CHOICES] so ftkey (F6) . • Press the [NYQUIST DIAGRAM] so ftkey (F4). Trac Coord [FFT] A: N ...

  • Agilent Technologies Agilent 35670A - page 59

    AGILENT 35670A Supplemental Operator’s Guide 55 • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. • Press the [Active T race] hardkey. • Press the [A] softkey (F2). • Press the [Trace Coord] har dke y. • Press the [MORE CHOICES] so ftkey (F6) . • Press the [REAL PART] so ftkey (F2) . • Press the [Active T race ...

  • Agilent Technologies Agilent 35670A - page 60

    AGILENT 35670A Supplemental Operator’s Guide 56 Section 19 : T w o Spectral Tra ces Showing Mils and Ips whi le EU is G Measure an accel erometer si gnal and displa y velocity and displacement spect ra with the UPPER/LOWER display format in the A GILENT 35670A as follows: Preset the AGILENT 35670A • T urn on the AGILENT 35670A, or • Press the ...

  • Agilent Technologies Agilent 35670A - page 61

    AGILENT 35670A Supplemental Operator’s Guide 57 • Press the [Trace Coord] har dke y. • Press the [Y UNITS] so ftkey (F8) • To ggle the [AMPLITUDE PK PP RMS] soft k ey (F 4) un t il PK is highlig hted. • Press the [XDCR UNIT CONVERT] so ftkey (F4) • Press the [inch/s (VEL)] so ftkey (F6) • Press the [Scale] hardkey. • To ggle the [AU ...

  • Agilent Technologies Agilent 35670A - page 62

    AGILENT 35670A Supplemental Operator’s Guide 58 Section 20 : Peak Hold During a Machine Run-up and Coast-Down Peak amplitudes experienced du ring run-ups and coast-downs can be m easured directly with the AGILENT 35670A using peak hold. Although the resulting spectra will indicate the maximum amplitude mea sured in each frequency bin during the c ...

  • Agilent Technologies Agilent 35670A - page 63

    AGILENT 35670A Supplemental Operator’s Guide 59 • Press the [Active T race] hardkey. • Press the [A] softkey (F5). • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. • Press the yellow [Start] hard k ey. When the run-up and run-down is completed, • Press the yellow [Pause/Cont] hardke ...

  • Agilent Technologies Agilent 35670A - page 64

    AGILENT 35670A Supplemental Operator’s Guide 60 Section 21 : Using an External Trigger for Tim e Averaging Use external triggerin g for synchronous avera ging o f linear spectra. W ith a reliable, consistent trigg e r, the re sulting noise floor tends to be elimina ted and the signal-to- noise ratio of the measurement can be optimal. If the trigg ...

  • Agilent Technologies Agilent 35670A - page 65

    AGILENT 35670A Supplemental Operator’s Guide 61 Acquire and Displa y the Trigger Signal • Press the yellow [Start] hard k ey. • Press the [Freq] ha rdk ey. • Pr ess the [UP ARRO W ] hardkey until only a few trigger pulses are visi ble . • Pr ess the yellow [Pause/ Cont] hardkey to stop the measurement and characterize the trigger si gnal ...

  • Agilent Technologies Agilent 35670A - page 66

    AGILENT 35670A Supplemental Operator’s Guide 62 Measuring Time Avera ged Spectrums with External Tr iggering Now that the ex ternal trigger h as been set up, th e analyzer is r eady to measure a signal w ith time averaging as f ollows: • Connect the external trigger signal to the E XT TRIG port on the bac k of the AGILENT 35670A. • T urn on t ...

  • Agilent Technologies Agilent 35670A - page 67

    AGILENT 35670A Supplemental Operator’s Guide 63 Section 22 : S av ing Trace Data to a 3.5” Disk or Non-Volatile RA M Save trace data into non-volatile RAM or 3.5” disk using the AGILENT 35670A Save/Recall capabilities. All AGILENT 35670A data is stored as a Standard Data Format (SDF) file. This data format is compatible across Agilent Technol ...

  • Agilent Technologies Agilent 35670A - page 68

    AGILENT 35670A Supplemental Operator’s Guide 64 Saving Trace t o Non-Volatile RAM (NV- RAM) To store Trace A d ata as a file named “N1.DA T” into NV-RAM, foll ow these steps: • Press the [Active T race] hardkey. • Press the [A] softkey (F5). • Press the [Save/Recall] hardkey. • Press the [DEFAULT DISK] so ftkey (F9). • Press the [NO ...

  • Agilent Technologies Agilent 35670A - page 69

    AGILENT 35670A Supplemental Operator’s Guide 65 Section 23 : Recalling Trace D a ta From 3. 5” Disk or Non-Volatile Memory Recall trace data from a file in non-vol atile RAM or 3.5” disk using the AGILENT 35670A Save/Recall capabilities. Recalled data is placed in a data r egister where it can be viewed, plotted, pri nted, anal y z ed, or use ...

  • Agilent Technologies Agilent 35670A - page 70

    AGILENT 35670A Supplemental Operator’s Guide 66 • Press the [DATA REGISTER] so ftkey (F8) . • Press the [D2] so ftkey (F2) . • Press the [Save/Recall] hardkey. • Press the [DEFAULT DISK] so ftkey (F9) . • Press the [NON-VOL RAM DISK] so ftkey (F9). • Press the [Save/Recall] hardkey. • Press the [RECALL DATA] so ftkey (F4) . • Pres ...

  • Agilent Technologies Agilent 35670A - page 71

    AGILENT 35670A Supplemental Operator’s Guide 67 Section 24 : Plotting and Printing Trace Data Use the plotting and printing capability of the AGILENT 35670A to generate hardcop y doc umentation of measu rement results. An y trace can be documented, however to plot or print data stored on disk or in NV-RAM, the data must first be recalled into a T ...

  • Agilent Technologies Agilent 35670A - page 72

    AGILENT 35670A Supplemental Operator’s Guide 68 • Sel ect the [SYSTEM CONTROLLR] softk ey (F2) . Check the Plot/Pr int Destination • Press the [Plot/P rint] hard k ey. • Press the [PLOT/PRNT DESTINATN] so ftkey (F4) . • Sel ect the [OUTPUT TO GPIB] softk ey (F1) . Plot th e Trace • Place a sheet of paper in the plotter and locate P1 and ...

  • Agilent Technologies Agilent 35670A - page 73

    AGILENT 35670A Supplemental Operator’s Guide 69 Section 25 : Importing Plots into Microsoft Word The plotter output of the AGILENT 35670A conforms to the HP-GL/2 G raphics Language. When the PLOT/PRINT output device is specified as a 3.5” disk file, not a printer or plotter, then the re sulting graphics files ca n b e imported directly into Mic ...

  • Agilent Technologies Agilent 35670A - page 74

    AGILENT 35670A Supplemental Operator’s Guide 70 Plot to a File U sing the AGILENT 3567 0A The AGILENT 35670A has the abilit y to route plotter output to a file. If the file is named with a “.HGL” file extension, then Word will reco gnize this file immediate l y as an HP Graphics Language file. Set up plotter output to a file • Press the [Pl ...

  • Agilent Technologies Agilent 35670A - page 75

    AGILENT 35670A Supplemental Operator’s Guide 71 Section 26 : Running a Single Calibration Test on Command The AGILENT 35670A automatically runs periodic sel f-calibration tests which ensure that all measurements will meet published performance specifications. If a calibration i s desired at a speci fic time, t hen a single caib ration ma y be per ...

  • Agilent Technologies Agilent 35670A - page 76

    AGILENT 35670A Supplemental Operator’s Guide 72 Section 29 : Transducer Un it Conv ersion w ith the A GILENT 35670A Automatic conversion between acc eleration, velocity, or displacement units is available with the Trace Coord cap ability in the AGILENT 35670A. Transducer sensitivity and transducer unit label is first specified for the input chann ...

  • Agilent Technologies Agilent 35670A - page 77

    AGILENT 35670A Supplemental Operator’s Guide 73 • Press the [XDCR UNIT CONVERT] so ftkey (F4) • Press the [inch (DISP)] so ftkey (F7) • Press the [Scale] hardkey. • To ggle the [AUTOSCALE ON OFF] soft k ey (F1) until ON is highlighted. This accomplishes the equivalent of multiplying “g” by 386.4 to get “inches per second squared” ...

  • Agilent Technologies Agilent 35670A - page 78

    AGILENT 35670A Supplemental Operator’s Guide 74 • Press the [DEFINE CONSTANT] so ftkey (F2). • Press the [DEFINE K1] so ftkey (F1) . • Ent er 386.4 and p r ess the [ENTER] softk ey (F1). • Press the [A na lys ] hardkey. • Press the [DEFINE FUNCTION] so ftkey (F1). • Press the [DEFINE F1] so ftkey (F1) . • Press the [CONSTANT (K1-K5) ...

  • Agilent Technologies Agilent 35670A - page 79

    AGILENT 35670A Supplemental Operator’s Guide 75 Section 30 : Using the Agilent Technologies D e mostration Unit with the A GILENT 35670A Several of the sections in this User’ s Guide are best explained with live data using transducers and machin es. Because i t is usuall y i mpractical t o bring machiner y into a laboratory for training purpose ...

  • Agilent Technologies Agilent 35670A - page 80

    AGILENT 35670A Supplemental Operator’s Guide 76 above the track number. The following d escriptions link the Sec tion in this User’s Guide to the appropriate CD track. Also described herein is the recommended CD output chann el connection to the AGILENT 35670A. Finall y any setup clues will be described to help utilize the signals on the CD. ...

  • Agilent Technologies Agilent 35670A - page 81

    AGILENT 35670A Supplemental Operator’s Guide 77 Section 4: Me asuring a Single Channel Spect rum CD Track: 24 CD Track Desc.: 160 kHz Calibration Tone Left Ch. (A Out): N/A Right Ch. (B Out): Channel 1 of the AG ILENT 35670A Section 5: Im p roving Measure ment Results CD Track: 24 CD Track Desc: 160 kHz Calibration Tone Left Ch. (A Out): N/A Righ ...

  • Agilent Technologies Agilent 35670A - page 82

    AGILENT 35670A Supplemental Operator’s Guide 78 Section 10: Measuring Dual Channel Spectra and Time Waveforms CD Track: 41 CD Track Desc.: Current Probe, Tachometer Left Ch. (A Out): Channel 1 of the AG ILENT 35670A Right Ch. (B Out): Channel 2 of the AG ILENT 35670A Section 11: Modal Testin g Using a Hammer and Ac celerometer CD Track: 44 CD Tra ...

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