IVIE IE-10A Owner'S And Operator'S Manual Download Page 1

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Summary of Contents for IE-10A

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Page 5: ...Our new address lvie Technologies Inc 1605 NW State St Lclli UT 84043 Ph 801 766 7600 Fax 801 766 8282 Audio Spectrum Analyzer Owners and Operators Manual January 1977 Printedin U S A...

Page 6: ...s page 19 Body E f f e c t s On Sound Measurements page 23 Correcting For Background Noise page 23 Adding Sound Levels page 23 Measuring dB SPL With The IE 1OA page 25 Making DBM Measurements page 29...

Page 7: ...prove to be defective provided the analyzer i s returned shipping prepaid to an authorized Ivie Electronics service faci 1i ty Defects caused by modifications misuse or accidents are not covered by t...

Page 8: ...s aluminum fusion bonded with nylon and internal construction i s 100 modular Every IE 1OA i s thoroughly and painstakingly tested t o assure complete p e r f o a n c e Each u n i t i s then heat test...

Page 9: ...t i s twice f m the second harmonic and 0 4 i s a frequency t h a t i s f o u r tenths t h a t o f the f i l t e r center frequency A well designed bandpass f i l t e r should a1low passband informat...

Page 10: ...g energy and they will display that energy on the analyzer a t an attenuated 1eve1 Depending upon the display range selected several f i1ters could respond t o a signal even though the energy i s a t...

Page 11: ...IE 1OA FRONT PANEL AND CONTROLS Figure 4 Page 5...

Page 12: ...ua1i ty Sound Level Meter type 2 The microphone becomes f u t i o n a l as the s i g n a l source f o r the IE 1OA only when t h e INPUT switch i s s e t t o i n t e r n a l INT QDISPLAY GRATICULE The...

Page 13: ...luminates when the Ni Cad batteries are low and require charging BATTERY CHARGER JACK This jack i s provided t o recharge the N i Ca batteries i n the IE 1OA using the model IE 165A adaptor charger 9S...

Page 14: ...time and f a l l t i m e response t o enable the operator t o view signal transients impulses osci 11ations music signatures and other rapidly changing phenomenon The pink noise averaging mode was des...

Page 15: ...l i n e being used Using the ZE 165A w i t h AC power o t h e r than 115v o r 230v a t 50 60 Hz may cause damage t o your IE 1OA The IE 1OA may also be operated d i r e c t l y from the AC power 1i n...

Page 16: ...d i n dB f o r r e l a t i v e measurements l i k e gain loss and frequency response For sound 1eve1 measurements using the IE 1OA microphone t h e analyzer i s always calibrated i n absol u t e dB SP...

Page 17: ...ine As analyzer r e s o l u t i o n reaches 1 dB per step i t can be observed t h a t pink noise i n the low frequency f i l t e r s appears less stable i n amplitude when viewed on the IE 1OA This i...

Page 18: ...le Figure 7 3 Set the ZE 1OA detectors i n the p i n k noise averaging mode This i s accomplished by moving the MODE switch t o the C f i l t e r position and then back t o OCT 4 Using the patch cable...

Page 19: ...esponse If desired display resolution can be increased f o r improved measurement accuracy o f the frequency response 2nd EXAMPLE A manufacturer specifies h i s audio device to have less than 10 dB i...

Page 20: ...ation signal high on the display It does not have t o be a t the 0 dB l i n e as shown CALIBRATION STEP 0 dB calibration Line Figure 11 4 Insert the audio t e s t device between the IE 20A and the IE...

Page 21: ...e analyzer testing i s measuring the frequency response o f speakers microphones and other audio devices i n t h e i r operating environments Speakers and m icrophones are normally characterized f o r...

Page 22: ...r a m p l i f i e r d r i v i n g the speakers 3 Increase the pink noise output from the IE 20A u n t i l room signal i s s l i g h t l y above normal l i s t e n i n g levels 4 Set IE 1OA controls i...

Page 23: ...been adjusted t o the desired response an overall dual channel response can be analyzed by p u t t i n g pink noise i n t o both channels a t the same time The transducers t o be used w i t h a p a r...

Page 24: ...ure 15 Using the system microphone for the IE 1OA response t e s t includes the microphone s response i n the o v e r a l l measurement Any equal i z a t i o n t h a t i s done w i l l also compensate...

Page 25: ...10 T h r e s h o l d o f Hearing 0 1 Small A i r c r a f t Engine Automobile Horn 1 Quite O f f i c e I Outdoors i n the C o u n t r y Figure 16 Of major importance t o the understanding o f sound me...

Page 26: ...readings t o be made w i t h an A weighted scale Noise causing hearing damage has been found t o correlate more c l o s e l y w i t h the A weighted scale which explains why t h i s p a r t i c u l a...

Page 27: ...single source i f t e s t s are made too close near field t o the source being measured see f i g u r e 19 The near field SPL can change dramaticall y w i t h small p o s i t i o n changes o f the sou...

Page 28: ...phones can be used One i s a f r e e f i e l d microphone and the other i s a pressure microphone The two microphones are designed t o be held a t d i f f e r e n t angles t o the sound sobrce The f r...

Page 29: ...e made w i t h the IE 1OA i n the same location 3 Calculate the difference between the two readings measured on the IE 1OA If the difference i s less than 3dB accurate measurements cannot be made If t...

Page 30: ...hart Go up u n t i l the curve i s intersected and then go l e f t t o the v e r t i c a l axis Then add the c o r r e c t i o n i n dB indicated by the v e r t i c a l axis t o the value of the highe...

Page 31: ...and the INPUT switch s e t t o INT the 0 dB graticule l i n e i s 140 dB SPL as shown i n Fig 23 The b u i l t i n microphone i s calibrated t o measure signals i n dB SPL i n a11 three f i l t e r mo...

Page 32: ...itches be s e t t o 0 dB the least s e n s i t i v e p o s i t i o n o f the analyzer and t h a t the 3 dB step resolution be selected If a signal does n o t appear on the display screen t h i s impli...

Page 33: ...be sure t o include the c o r r e c t sign 1ST EXAMPLE With one o f the s e n s i t i v i t y switches set t o 0 dB and the other set t o 60 dB the 0 dB l i n e on the IE 1OA display changes t o a ref...

Page 34: ...e a t a l e v e l o f 90 dB plus 2 dB 92 dB SPL 1 d B S c a l e I3 2 b I K l 4 K 8 K I t K 3 6 9 YM H L 92 d B S P L l a 1 1 1 1 I I 1 1 l l os 90 dB SPL e f 1 1 1 1 I I l I I I 1 1 a 1 1 1 1 1 1 I l...

Page 35: ...v i t y switches on the IE 1OA f r o n t panel there are two colored reference levels 0 dBm i n blue and 140 dB SPL i n red Note t h a t the INPUT switch i s also c o l o r coded w i t h b l u e f o...

Page 36: ...oise 1k H z OdBm REFERENCE I 5dB Figure 28 Determining what the reference level i s on the analyzer simply requires t h a t we add the two switch settings o f the s e n s i t i v i t y control Referri...

Page 37: ...select the 3 dB per step resolution t o allow the maximum display range o f 45 dB while l o c a t i n g the signal Once found the unknown signal can be viewed w i t h greater resolution than 3 dB per...

Page 38: ...I S J 4OdBm REFERENCE 1 1 l 1 1 1 1 1 1 l 2 4 6 I 1 1 1 l 1 1 1 1 1 3 6 9 I I I I I 4 1 2 4 8 d m center Scale S W M I I I 1 1 1 1 1 1 l 4 n 18 I I 1 1 1 1 1 1 1 7 Y 1 1 1 1 1 1 1 1 1 1 1 a U 4 l 1 1...

Page 39: ...esolution g r a t i c u l e scale should be used Adding the SENSITIVITY switches the REFERENCE l i n e i s 60 plus 0 equal t o 60 dBm The 4 KHz signal i s 2 dB above the reference l i n e a t a level...

Page 40: ...al t o 1 23 microvolts 116 dBm from 32 Hz t o 4 KHz and i s equal t o 3 46 microvolts 107 dBm i n the widest bandwidth a t 16 KHz For octave o r fractional octave real time analyzers the noise f l o o...

Page 41: ...tor i s basically a 20 dB attenuator as i s the 10 1 divider oscilloscope probe Input s e n s i t i v i t y equal t o the value of the attenuator i s sacrificed any time an attenuator i s used with a...

Page 42: ...order t o determine the true signal level I n the example of Fig 32 the analyzer i s displaying a signal level o f 4 dBm a f t e r 20 dB of attenuation The actual signal l e v e l i s 24 dBm 4 dBm 20...

Page 43: ...probe adaptor from I v i e E l e c t r o n i c s w i l l provide 20 dB o f attenuation and when used w i t h a 10 megohm 10 l d i v i d e r probe w i l l provide 40 dB o f attenuation t o the input o...

Page 44: ...u l l rated output power i s usually specified by the a m p l i f i e r manufacturer along w i t h a t e s t frequency o r range o f frequencies It i s recomnended t h a t the 51AD adaptor and a 10 1...

Page 45: ...ng a 40 dB attenuator w i t h the IE lOA a displayed signal l e v e l of 38 dBrn i s equal t o a t r u e signal l e v e l o f 2 dBm 38 dBm 40 dB The generator should remain connected t o the t e s t a...

Page 46: ...generator 1i k e the IE 20A i s that both gain o r 1oss and frequency response are displayed simul taneously For greater d e t a i l on pink noise applications and tests refer i n the operator s manua...

Page 47: ...the gain i s equal t o 26 dBm Gain i s a r e l a t i v e measurement not absolute and i s u s u a l l y expressed i n dB Measuring the gain o f a m p l i f i e r s w i t h output voltages i n excess o...

Page 48: ...e as shown i n Fig 36below I t i s n t necessary f o r the signal level t o be a t 0 dB on the analyzer display but i t does serve as a convenient calibration 1ine for most insertion loss measurements...

Page 49: ...his indicates that our signal is between 8 dB and 9 d B down from the 0 d B calibration line Insertion loss is equal to 8 5 dB and so our test device meets specifications a t 63 Hz To be more rigorous...

Page 50: ...o f 10 Hz 40 KHz Only three analyzer c o n t r o l s a f f e c t the operation o f the preamplifier these are POWER SENSITIVITY controls gain o f preamp and INPUT Gain o f the preamp1if i e r i s dete...

Page 51: ...he IE 1OA preamplif i e r output c i r c u i t i s capable o f delivering a maximum o f 2 0 Volts RMS i n t o a 600 ohm 1oad Load impedances 1ess than 100 ohms can be used b u t wi t h some sacrifice...

Page 52: ...Relative f i l t e r flatness 0 5 dB Passband flatness 0 5 dB Ripple A weighted and C weighted sound level f i l t e r s F i l t e r shape and accuracy s a t i s f i e s ANSI S1 4 1971 type SZA S2C an...

Page 53: ...rs Low battery i n d i c a t o r l i g h t A C LINE OPERATION from AC adaptor charger 115 230 VAC 50 60 Hz Charge i n d i c a t o r 1ight ENVIRONMENTAL A l l c i r c u i t s temperahure compelsated Op...

Page 54: ...times The f a s t detector time s h a l l be suitable f o r signal monitoring and the slow detector response time s h a l l be suitable f o r pink noise averaging The analyzer s h a l l have a dynamic...

Page 55: ...ing prepaid t o an I v i e Electronics service f a c i l i t y Shipping the instrument i n i t s original packaging i s recommended Repair w i l l be made and the u n i t w i l l be returned prepaid a...

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