Wavetek 452, Instruction Manual

Page 1: ...frequency domain applications and Flat Delay response for transient free time domain applications The Models 452 and 852 are elec trically and mechanically similar each covering the cutoff frequency...

Page 2: ...Between Channels Typical 452 452 01 1 or 1 whichever is greater 852 852 01 2 or 2 whichever is greater FLAT DELAY RESPONSE Low Pass Delay Typical 452 452 01 1 2fc sec 852 852 01 1 fc sec Attenuation...

Page 3: ...IS PROVIDED SOLELY FOR INSTRUMENT OPERATION AND MAINTENANCE THE INFORMATION IN THIS DOCUMENT MAY NOT BE DUPLICATED IN ANY MANNER WITHOUT THE PRIOR APPROVAL IN WRITING FROM WAVETEK W AVETE WAVETEK SAN...

Page 4: ...plier I anges Page 1 6 Paragraph 1 5 following Frequency Range table bottom of page Add NOTE Specifications apply for cutoff frequency dial settings from 0 10 to 10 1010 Page 1 7 PaI agI aph 1 5 Maxim...

Page 5: ...Buyer shall prepay shipping charges taxes duties and insurance for products returned to Wavetek for warranty service Except for products returned to Buyer from another country Wavetek shall pay for re...

Page 6: ...covers removed This should be done only by qualified personnel aware of the electrical hazards The instrument power receptacle is connected to the instrument safety earth terminal with a green yellow...

Page 7: ...ay for frequencies below its cutoff frequency This fil ter is suitable for time domain applications because of its inherent obil ity to poss transient waveforms with a very sma l l amount of d istorti...

Page 8: ...nts It is 1 3 inches deep and weighs 1 0 pounds Model 452 or 1 2 pounds Model 852 The power switch operating controls and input and output terminals are located on the front panel The rear panel conta...

Page 9: ...1 0 and a four position xl 0 xl 00 xl K xl 0K multiplier switch Option 01 adds a fifth position x1 to the multiplier switch Multiplier xl xl 0 xl 00 xl K x l 0K Frequency Hz 0 01 1 1 1 0 1 1 1 1 l l...

Page 10: ...is greater FLAT DELAY RESPONSE Low Pass Delay Typical Attenuation at Cutoff S tabil ity of Delay Typical Phase Match between Channels Typical INPUT CHARACTERISTICS Circuit Impedance F ul l scal e Sig...

Page 11: ...purious Companents 110 dB below ful l scale signal DC Offset at 25 C Within 2 5 m i l l ivolts at any fc setting Drift vs Temperature 100 microvolts oC typ 500 micravolts oC max Drift vs Time Typical...

Page 12: ...ass Two channels connected in parall e l Low Pass DC Coupled with 48 dB oct rol loff High Pass with 48 dB oct rol loff Low Pass with 96 dB oct roll oH High Pass with 96 dB oct rol loff B and Pass with...

Page 13: ...2 fc and is equal to 0 22 f Band Reiect An insertion loss of approximately 6 dB is produced Cutoff Frequency Accuracy 2 Attenuation at Cutoff 3 dB Stopband Attenuation Rate Rol loff 48 dB octave nomi...

Page 14: ...V rms DC to 300 KHz decreasing to 4 Volts 2 8 V rms at 1 MHz R 2 5 K 1 5 mA max current L Broadband Noise at either Gain Setting 200 microvolts rms max for 1 00 KHz detector bandwidth Harmonic Compon...

Page 15: ...Size Weight Configuration Accessories supplied 1 1 5 230 VAC 1 0 10 50 500 Hz S walts BNC s on front rear panel S lide switch on rear panel to disconnect circuit ground from power ground 3 1 2 H x 1...

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Page 17: ...laim with the carrier immediatel y Preserve the carton and packing materials they wil l be required by the carrier It is recommended that conformance to specifications be verified upon receipt In case...

Page 18: ...ack mount brackets are to prevent the instrument from sliding when mounted in a rack They are not intended to support the weight of the instrument and should never be used for lifting or carrying Inst...

Page 19: ...lel ground adapter and connect the short lead to ground 2 4 CONTROLS AND I ND ICATORS Controls and indicators are shown in Figure 2 1 and described i n Table 2 1 The descriptions i n Table 2 1 and the...

Page 20: ...gh Pass Out selector switch Output BNC Connector F lat Delay In or F l at Amplitude Out selector switch 20 dB Gain In or 0 dB Gain Out selector switch Input BNC Connector Channel 2 Controls and Indica...

Page 21: ...1 2 3 4 5 11 10 9 12 13 14 19 6 7 FRONT PANEL 8 15 16 REAR PANEL Figure 2 1 Controls and Indicators 17 18 2 5...

Page 22: ...tion is due to Siew Rate limitations of the Operational Amplifiers employed in the instrument When 20 dBGC l in Volt 0 71 V 10 8 6 CAUTION Input signals i n Gain setting may damage the instrument t 4...

Page 23: ...response ral ls off at a rate of24 dB octave 8 and48 dB octave 160 The Low Pass or High Pass Butterworth response for either model may be deter mined by Icaling the normalized plots given in Figures2...

Page 24: ...a vailable at OUT 2 The passband in this configuration extends from the High Pass Cutoff Frequency to the Low Pass Cutoff Frequency setting Maximum passband gain of 40 dB is available If only 20 dB g...

Page 25: ...ends from the Low Pass Cutoff Frequency to the High Pass Cutoff Frequency Again the overa l l response may be determined by combining the normal ized plots given in Figures 2 3 through 2 6 f Sharp Not...

Page 26: ...ow the reduction in input signal shown in Fig 2 2 provided the current required by the load connected to the instrument does not exceed the maximum value of 15 mAo Heavy capacitive l oads can easily...

Page 27: ...tI W III 2 0 11 2 Ul W II 3 0 2 t m Ul Ul a 1 2 1 0 o m tI 20 W Ul 2 o 40 11 Ul W II 60 o 2 3 4 5 6 B 2 3 4 5 6 NORMALIZEO FREGlUENCY E Fe Fig 2 3 452 Flat Ampl Respanse La Pas BO t m 11 o 100 I B 10...

Page 28: ...1 2 BP 3SNOdS3t f CN f8SS fd o N I I I I I 1 0 III W 10 u l U N 2 w J c J w II Il C III w N W oJ 10 ct II C 2 N o N o w o III O o o I I I I I C BP 1 3SNOdS3t f CN fBdO LS 0 I c 0 E 0 u N l t t I N OJ...

Page 29: ...0 o W 1 III 2 0_2 11 III W II 3 o 2 m III III 1 2 I I 1 i I 3 4 5 6 S 1 2 3 4 5 6 NORMALIZED FREQUENCY Fe Fig 2 5 852 Flat Amp Response Lo Pass o m 0 20 W Ul 2 o 40 11 Ul w 60 II o 2 so m 11 o 100 l S...

Page 30: ...o m 0 0 W 1Il 20 2 o 0 40 III w a 0 60 2 m BO 0 o I 111 100 1 2 I 3 4 5 6 B 1 2 3 4 5 6 NORMALIZEO FREGUENCyeL Fe Fig 2 6 852 Flat Ampl Response Hi Pass o m 0 1 W III 2 3 2 o 0 III w a o 2 m III III B...

Page 31: ...8 ttl 6 J W o 4 o 2 J eX 0 0 II o 2 FL AT A IPL FLA CELt Y f t 2 4 6 8 1 0 1 2 1 4 1 6 1 8 NO MALIZEO F EGUENCY Fe Fig 2 7 452 Phase Response Lo Pass I FLA AMF r FLA CEL Y L t 2 4 6 8 1 0 1 2 1 4 1 6...

Page 32: ...2 2 J W o 13 o 2 1 6 W 4 N J c a a tI o 2 K FLA AMPi FLAT CEL 2 4 6 13 1 0 1 2 1 4 1 6 1 13 NORMALIZED FREGUENCY Fe Fig 2 9 852 Phase Response Lo Pass I FLA AMI r FLA 1 CELJ Y 2 4 6 13 1 0 1 2 1 4 1...

Page 33: ...SS f V V FILTER WHIGH PASS I K FILTER DETERMlNES Ie Band Reject Filter 80TH FILTERS SET AT fc LOW PASS f LOW A S FILTER FILTER TPUT Low Pass Filter with Doubled Rolioff Fig 2 11 PASSBAND t cI2 Ie 2 ll...

Page 34: ...N Xl o 3 6 m 20 11 o J W g 40 I J D SO ao 100 r I 1 1 1 I I f 1 1 r I 1 I I 0 1 02 04 08 I 2 4 8 2 4 8 10 20 40 80 NORMAL IZEO FREQUENCY _ F C Fig 2 12 452 Sharp Notch Response...

Page 35: ...as a building block to synthesize higher order fi lters The gains of these stages at dc and at cutoff are as fol lows Input Attenuator Input Buffer 1 st Prototype 2nd Prototype Overal l OUT IN Gain a...

Page 36: ...3 0 dB Cutoff Freguency control is obtained by changing the resistors of the filter i n 8 4 2 1 BCD steps The capacitors are changed i n decade steps and Option 01 adds an extra set of capacitors to...

Page 37: ...SS FLAT AMPL FLAT DELAY I r L ___ I I I I TP 2 I 1sl 2nd 2nd ORDER 2nd ORDER BUFFER PROTOTYPE PROTOTYPE CHANNEL 1 MAINBOARD ASS Y 0 15V OPTIeN 01 ASS Y POWER Channell SUPPLY ASS Y OPTION 01 ASS Y Chan...

Page 38: ...I I I c TP I I TP 2 I TP 3 I t 2nd 3rd 1 4 2nd ORDER 1 9 2nd ORDER t L l 2nd ORDER PROTOTYPE PROTOTYPE PROTOTYPE CHANNEL 1 MAINBOARD ASS Y 0 15V OPTION 01 ASS Y POWER Channell SUPPLY ASS Y OPTION 01...

Page 39: ...de of such prototype sections may be tailored by appropriate selection of damping and the desired higher order filter may thus be synthesized In the Model 452 a fourth order Flat Amplitude or Butterwo...

Page 40: ...w CJ 20 10 co 0 UJ VI Z 0 0 0 V1 UJ UJ Cl 10 J a E 20 30 1 2 3 4 5 6 8 1 2 3 4 5 N ORMALIZED FREQUENCY FIFe Fig 3 4 Response of 2nd order low Pass Prototype for various values of damping B 6 8 10...

Page 41: ...Digital Multimeter 1 00 uV de resolution AC Voltmeter 1 accuracy RMS Voltmeter True RMS Frequency Synthesizer 70 dB harmonics at 1 K Hz Bond Pass Filter 24 dB oct rolloff 40 dB Gain Spectrum Analyzer...

Page 42: ...components 1 1 5 9 K Fig 4 1 1 KHz Notch Fi lter WAR N I N G The specifications of these i nstruments cannot be veri fied unl ess the recommended equi pment or equa l is uti l ized i n test In particu...

Page 43: ...50 ohm CUT r 5K Setup 1 452 CUT B P Filter Setup 2 50 ohm I C UT r 5K Setup 3 50 f LPF I CUT ohm 400FL Notch AC Voltmeter Filter Setup 4 Fig 4 2 Performance Test Setups b 400FL AC Voltmeter 3620A RMS...

Page 44: ...r Top figures Figures in parentheses 452 Specifications 852 Specifications Ideal Respoose r fc 2 fc Specification Limits Effect of Passband I Frequency Tolerance Fig 4 3 Passband Gain Cutoff Frequency...

Page 45: ...tion Accuracy D C Offset Broadband Noise Maximum Stopband Attenuation Harmonic Components AC Line related Spurious Components S pecification Model 452 0 0 25 dB 20 0 25 dB 0 5 dB H P x1 0K 2 0 2 5 mV...

Page 46: ...the input connector of the Channel Under Test CUT and the DC Multimeter across the output connector A l l ow at least 1 0 minutes for the i nstrument to warm up under its own power and measure the DC...

Page 47: ...off Frequency H i Pass 20 dB Gain F lat Ampl Set the 51 00 Frequency Synthesizer to 1 00 KHz and increase its output amplitude until CUT output is equal to ful l scal e signal of 7 1 V nms 1 7 dBV Set...

Page 48: ...of 1 00 x l K 0 dB Gain Flat Ampl response Set the Channel Under Test as fol l ows 1 00 x 1 0 Cutoff Frequency Hi Pass 20 dB Gain Flat Ampl Increase Synthesizer amplitude unti l ful l scale signal of...

Page 49: ...as fol lows 1 0 00 x 1 0 K Cutoff Frequency Lo Pass o dB Gain F lat Ampl Set the 3580A S pectrum Analyzer controls as fol lows Input Sensitivity 30 dBV Input Sensitivity Vernier CAL Bandwidth 3 Hz Fre...

Page 50: ...band Gain Gain Frequency S pecification o dB 1 KHz o 25 dB 20 dB 1 K Hz 20 25 dB o dB 1 0 K Hz o 25 dB 20 dB 1 0 KHz 20 25 dB o dB 1 00 KHz o 5 dB 20 dB 1 00 K Hz 20 5 dB Table 4 2 Cutoff Frequency Ca...

Page 51: ...P 900 Hz 2 40 dBY to 3 60 dBY 0 80 x 1 K L P 800 Hz 2 40 dBY to 3 60 dBY 0 70 x l K L P 700 Hz 2 40 dBY to 3 60 dBY 0 60 x 1 K LP 600 Hz 2 40 dBY to 3 60 dBY 0 50 x 1 K L P 500 Hz 2 40 dBY to 3 60 dB...

Page 52: ...dB H P 2 0 dB Table 4 4 Mode Gain LP o dB L P 2 0 dB H P o dB H P 2 0 dB D C Offset Specification 2 5 mV dc 2 5 mV dc 2 5 mV d c 2 5 mV dc Broadband Noise Specification 1 00 uV rms max 1 00 uV rms max...

Page 53: ...able 4 1 Passband Gain Accuracy Input Passband Gain Gain Frequency Specification o dB 1 K Hz o 5 dB 20 dB 1 K Hz 20 5 dB o dB 1 0 K Hz o 5 dB 20 dB 1 0 K Hz 20 5 dB o dB 1 00 K Hz O 1 dB 20 dB 1 00 KH...

Page 54: ...Hz 1 8 dBV to 4 2 dBV l P 5 00 KHz 1 8 dBV to 4 2 dBV l P 4 00 KHz 1 8 dBV to 4 2 dBV l P 3 00 KHz 1 8 dBV to 4 2 dBV L P 2 00 KHz l B dBV to 4 2 dBV L P 1 00 KHz l B dBV to 4 2 dBV L P 1 00 KHz 1 8 d...

Page 55: ...2 0 dB 200 uY rms max 0 01 x 1 0 H P o dB 200 uY rms max 0 01 x 1 0 H P 20 dB 200 uY rms max Table 4 5 Maximum Stopband Attenuation Cutoff Input Frequency Mode Frequency Specification 1 00 x 1 0K L P...

Page 56: ...dB gain is out of specifi cation Connect the Frequency Synthesizer to the input of the instrument and the Gain Phase Meter betwen input and output Use the fol l owing settings Input Frequency Amplitud...

Page 57: ...t R1 9 to obtain a reading of 1 7 4 dBV 5 Move the AC Voltmeter to T P 4 and adjust R24 to obtain a reading of 1 2 8 dBY 6 Move the AC Voltmete to OUT and adjust R31 to obtain a reading of 3 6 dBV 7 C...

Page 58: ...9 3 0 2 90 3 Model 852 Perform the fol lowing adjustments TP l TP 2 TP 3 Gain Phase meter connected between T P 2 TP 3 T P 4 Alternately Adjust C29 C34 C39 C44 C49 C54 to obtain Gain dB 5 5 0 2 1 9 0...

Page 59: ...n switch by verifying a short open between the third wire of the power cord and the she l l of one of the BNC connectors If one LED indicator is on and the other is off troubleshoot the Power Supply b...

Page 60: ...ply leads from Mainboard Turn on instrument and measure 1 5 V dc and 15 V dc at these leads Yes Turn off instrumen and reconnect leads to Main baard Turn on instrument and al low 1 0 minutes warm up T...

Page 61: ...e Shield Box forward c Remove the four screws which fasten the Power Supply board to the Rear Panel standoffs Disconnect Power Supply leads from Mainboards and move Power Supply board out of the Shiel...

Page 62: ...ce CR1 8 C7 points marked I 0 Yes V Measure 1 5 V de 15 Y dc No O 25 Y de at left set of points Replace U2 marked 1 5 15 point marked o is ground Yes Measure 1 5 Y de 15 Y dc No O 25 Y de at right set...

Page 63: ...t i s required access to the bottom of the Mainboard is either readi ly available or if behind one of the Support B ars it may be made avai lable as fol lows a Remove the three screws from each Mainbo...

Page 64: ...dBV at OUT N o I Replace AR3 Model 452 Measure 1 6 6 dBV at TP 1 Na I Replace AR1 I Yes Measure 1 6 3 dBV at TP 2 N o Replace AR2 Yes Measure 1 3 8 dBV at TP 3 N o Replace AR3 Yes Measure 8 3 dBV at...

Page 65: ...h of the cut pins or l eads and remove from the board clean the hol e s with a toothpick or solder suction tool Form the tinned l eads of the replacement part and insert in the printed circuit holes s...

Page 66: ...the powe r s u ppl y s h i el d p ry out the b l ack Hayco grommet Cut any cab l e t i es i f n e ede d Step 7 R emove the two sc rews ho l di ng the rea r pa n el to s i de frame a nd t he two sc re...

Page 67: ...ddress inqui ry to your Wavetek Representative or Wavetek San Diego Inc 9045 Balboa Ave San Diego CA 921 23 Phone 61 9 279 2200 TWX 91 0 355 2007 Specify the fol lowing information A AR B C CR DS F FL...

Page 68: ...t 500 uF 50 V C Fxd tant 0 01 uF 20 35 V C Fxd polyester 0 001 5 uF 1 0 1 00 V CR S i l FWB 50 PIV 1 5 A R Fxd camp 1 5K 5 1 4W R Fxd comp l 0 ohm 5 1 4W R Fxd comp 2 2K 5 1 4W S Switch S lide DPDT PC...

Page 69: ...etflm 900K 1 l SW R Fxd metflm l OOK 1 1 SW R Fxd comp 2 7K 5 1 4W R Fxd comp l 0K 5 1 4W R Fxd metflm 64 9K 1 1 SW R Var cenmet 50K 1 J o 1 2W R Fxd comp 1 00 ohm 5 1 4W R Fxd metflm 4 32 K 1 1 SW R...

Page 70: ...metflm 39 8K 1 1 8W 1 12 3980 R57 R61 R81 R85 R Fxd metflm 1 99K 1 1 SW 1 1 3 1 990 R58 R62 R82 R86 R Fxd metflm 796K 1 1 8W 1 1 3 7960 R59 R63 R83 R87 R Fxd metflm 1 59M 1 1 8W 1 1 4 1 590 R60 R64 R8...

Page 71: ...0 V 1 04 41 00 C27 C32 C37 C42 C47 C52 C57 C62 C Fxd polycarb 0 01 uF 1 1 00 V 1 04 31 00 C28 C33 C38 C43 C48 C53 C58 C63 C Fxd mica dipped 820pF 1 0 500 V 1 01 1 82 0 C29 C34 C39 C44 C49 C54 C59 C64...

Page 72: ...R6S R72 R92 R96 R1 1 6 R1 20 R Fxd metflm 3 98K 1 0 1 8W R49 R53 R73 R77 R97 RI 01 R1 21 R1 25 R Fxd metflm 1 9 9K 1 1 8W R50 R54 R74 R78 R9S Rl 02 R1 22 R1 26 R Fxd metflm 79 6K 1 l 8W R51 R55 R75 F...

Page 73: ...fN R Fxd camp 2 7K 5 1 4W S Push button Push Push DPDT S Rotary 8pole 1 2 pas Coded S Push button Push Push 8PDT S Ratary 1 3 pole 2 5 pos U Linear Op Amp C Fxd mica dipped 1 00pF 1 0 500V ASS EMBLY...

Page 74: ...ABSY MAINBOAJ lO ASSY Alii CHANN 1 1 MAINBCARC ASSY Alii CHANN I1 Fig 5 1 MAINSOARO ASSY A3 CHANN 2 Model 452 01 SUPPL Y ASSY A 1 h dden under shield C A MAINSOAJ lO ASSV A3 CHANN 2 Model 852 01 Asse...