Copyright 2010 ITRI 工業技術研究院 1 Agilent 35670A Operator’s Guide Different types of measurement. Rotating Machinery Structures(FRF) Sound/Acoustics Spectra and Networks Control Systems

Copyright 2010 ITRI 工業技術研究院 2 HP 35670A (Front Panel)

Copyright 2010 ITRI 工業技術研究院 3 Spectrum Analyzer Initialize the analyzer- [Preset] [Inst Mode]- FFT Analysis, channels [Meas Data] [Active Trace]- selecting which type of data you want to display,PWR SPEC,LIN SPEC,TIME CHANNEL(1), [Freq] – span measurements, resolution, record length [Input] – Measurement parameters affect the way the analyzer takes input data, RANGE,FRONT END CH1 SET UP, XDCR UNIT CH1 SET UP grounded/floating input coupling ac/dc anti-alias filter on/off autoranging on/off A-weight filter on/off ICP power supply on/off Sensitivity on/off

Copyright 2010 ITRI 工業技術研究院 4 [Window]- Selecting a windowing function, HANN, FLAT TOP, UNIFORM,FORCE EXPO, FORCE EXPO SETUP [Trigger]- Selecting a triggering function, Free Run Trigger, External Trigger, Channel Trigger, Source Trigger, GPIB Trigger [Avg]- average on/off, number averages, average type,fast avg on/off, update rate, repeat on/off, overlap %, overload rej on/off, average preview off/manual/time [Source]- source on/off, level, dc offset,

Copyright 2010 ITRI 工業技術研究院 5 [Trace Coord]- Linear Magnitude, Log Magnitude, db Magnitude, phase, wrapped phase, x units,Y units [Analysis]- define function, define constant, data edit, curve fit, synthsis [Scale]- autoscale on/off, match Y scale, axes scale markers [Disp Format]- single, upper/lower, front/back, upper/big lower, quad, measurement state, waterfall setup [Marker]- marker on/off, coupled on/off, peak trk on/off [Marker Fctn]- harmonic marker, band marker, sideband marker, freq & damping

Copyright 2010 ITRI 工業技術研究院 6 Measuring Rotating Machinery 1. Initialize the analyzer. Press [Preset] [DO PRESET]. Press [Inst Mode] [FFT ANALYSIS]. Press [CHANNELS 1 2] (or [CHANNELS 1 2 4]) Press [Meas Data], then press [CHANNEL 1 2] (or [CHANNEL ]) to highlight the channel whose transducer you will calibrate. Press [PWR SPEC CHANNEL x]. 2. Match the active trace’s display unit to the calibrator’s output unit. Press [Input], then press [CHANNEL 1 2] (or [CHANNEL ]) to highlight the channel whose transducer you will calibrate. Press [XDCR UNIT CHx SETUP] [XDCR UNIT LABEL], then press the softkey corresponding to your calibrator’s output unit. Press [Input] [XDCR UNIT CHx SETUP], then press [XDCR UNIT ON OFF] to highlight ON. Press [Trace Coord] [Y UNITS] [EU]. Press [AMPLITUDE PK PP RMS].

Copyright 2010 ITRI 工業技術研究院 7 3. Connect the transducer’s output cable to the analyzer as described at the beginning of this chapter, then secure the transducer to the calibrator. 4. Specify the measurement parameters. Press [Freq] [SPAN], then press the down-arrow key if you want to reduce the frequency span. Press [Window] [FLAT TOP] to maximize amplitude accuracy. 5. Press [Scale], then press [AUTOSCALE ON OFF] to highlight ON. 6. Turn on the calibrator, then press [Start]. 7. After the display has been updated at least once, move the marker to the calibrator’s output frequency and enter calibrator’s output amplitude. 8. Press [Marker] [MARKER TO PEAK]. Press [Input] [XDCR UNIT CHx SETUP] [CAL VALUE AT MARKER], then type the calibrator’s specified output amplitude and press [ENTER].

Copyright 2010 ITRI 工業技術研究院 8 Measuring Structures(FRF)

Copyright 2010 ITRI 工業技術研究院 9

10 1. Initialize the analyzer. Press [Preset] [DO PRESET]. Press [Active Trace] [A B]. Press [Meas Data] [FREQ RESP 2/1]. 2. Connect the device-under-test (DUT) as shown in the illustration below. 3. Specify the measurement parameters. Press [Freq] [START], then press [STOP]. Press [Input]. Press [CHANNEL ] to highlight 1. Press [CHANNEL 1 RANGE]. Press [CHANNEL ] to highlight 2. Press [CHANNEL 2 RANGE]. Press [Window] [FORCE EXPO]. Press [FORC EXPO SETUP]. Press [CHANNEL 1 FORC EXPO] to highlight FORC. Press [FORCE WIDTH]. Press [CHANNEL 2 FORC EXPO] to highlight EXPO. Press [EXPO DECAY].

Copyright 2010 ITRI 工業技術研究院 Specify the triggering and averaging parameters. Press [Trigger] [CHANNEL ] to highlight 1. Press [TRIGGER SETUP] [CHANNEL LEVEL] [PERCENT %] Press [CHANNEL 1 DELAY] [+/-]. Press [CHANNEL ] to highlight 2. Press [CHANNEL 2 DELAY] [+/-]. Press [Avg], then press [AVERAGE ON OFF] to highlight ON. 5. Configure the display. Press [Trace Coord] [X-AXIS LIN LOG] to highlight LIN. Press [Active Trace] [B]. Press [Trace Coord] [PHASE]. Press [Active Trace] [A B]. Press [Scale], then press[AUTOSCALE ON OFF] to highlight ON. 6. Measure the DUT. Press [Start]. Slowly tap the device 10 times with the impact hammer at or near the accelerometer.