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Philips PM 5125, Manual

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Summary of Contents for PM 5125

Page 1: ...1 _ r t Ta c _nJ U PHILIPS GENERATOR PM 5125 5445 O51 25031 9499 450 04411 31511 1103 Manual ...

Page 2: ...Z IMPORTANT In correspondence concerning this instrument please quote the type number andtheserialnumber asgiven on the typeplate at the rear ofthe instrument ...

Page 3: ...erminals and their functions 18 VII Operation 20 SERVICE DATA VIII Circuit description 23 IX Gaining access to parts 2ff X Survey of adjusting elements 3p XI Checking and adjusting 32 XII Fault finding 37 XIII Lists of parts 38 XIV Information concerning the modular system and optional accessories 4 A General 4g B Coupling accessories 50 C Coupling instructions S9 ...

Page 4: ...hanical components 40 16 Rear view indicating the mechanical components 40 17A Top view indicating the mechanical components 41 17B Bottom view indicating the mechanical components 41 l8 Coupling kit 52 19 Cover kit 52 20 Stand assembly 55 2l Rack mounting exploded view 57 22 Coupling two modular units exploded view 23 Printed wiring board of the oscillator GO 24 Printed wiring board of the square...

Page 5: ...s of one decade and continuously The following two outputs are provided one output with an impedance of 600 4 The output voltage may he varied continuously up to l0 V open circuit as well as in four accurate steps of 20 dB one low impedance output The output voltage may be varied Conti nuously up to 10 V Both outputs are switched simultaneously to sine wave or to square wave The output voltage is ...

Page 6: ...ument The maximum ambient tem perature is 45 C r A FREQUENCY Range 10 Hz 1 MHz in five overlapping subranges i Inaccuracy at 20 C 100 Hz 100 kHz 3 10 Hz I MHz 5 l 1E9 t z05 Frequency variations at mains variations off 10 Temperature coefficient 0 oa i az of 1 l ol oz negligible 0 015 per C at 5 kHz sF roearm sF dl I o OA WN IOOHx IkHz Fig 1 Typicaljrequency response curve AFH 100MHz IMN F AE OUENC...

Page 7: ...of 20 minutes and at constant ambient temperature and mains voltage 0 005 in 10 minutes at 5 kHz after a warming up period of 20 minutes and at constant ambient temperature and mains voltage I00 Hz 100 kHz Hat within _ 0 1 dB referred to 5 kHz l0 Hz I MHz flat within 0 2 dB referred to 5 kHz 10 Hz 100 kHz c3 io at 600 kHz 1 o SPECIFICAiION IOHx 100Hz IMHz IONHz Fig 2 Typrca distortion curve t OOkH...

Page 8: ...40 d6 linear for sine wave 26 dB linear for square wave 3 20 dB inaccuracy 0 2 dB s epatSkHz 60 dB down a maximum setting of the continuous attenuator 10 V or sine wave or 10 V for square wave into 600 O 16 f2 for sine wave 10 52 for square wave 6 1 1 52 SO pF 40 dB linear for sine wave 26 dB linear for square wave Hum and noise 60 dB down at maximum setting of the continuous attenuator Note Both ...

Page 9: ... to indicate a the sine wave output voltage r ms open circuit or b the square wave output voltage p p open circuit 0 lOV 0 16dBm 5 of full scale deflection max 7 2 ofset frequency with a negligible deteriora tion of performance 40 mVr per hold j I S V 100 kS2 Supply voltage I IS V or 230 V _ IS Frequency 50 100 Hz Power consumption 28 W G MECHANICAL DATA Dimensions Weight 3 module cabinet see chap...

Page 10: ...tenuators and a double power supply r OSCILLATOR The phase shift oscillator consists of three unity gain amplifier stages The first two amplifier stages give each aphase shift of 90 for the oscillating frequency and the third amplifier stage gives aphase shift of 180 The output signal of the third amplifier stage is fed back to the input of the first amplifier stage The amplifier stages are couple...

Page 11: ... step attenuator SK4 and to the meter M1 which monitors the output voltage at BUI In position 2 of SK2 the squarer converts the sine wave signal into a square wave signal then the square wave signal is also applied to the terminal LOW Zo BU l tothestep attenuator SK4and to the meter M 1 AMPLfTUDE R2r R2rr The amplitude of the output signala the erminals LOW Zo BUI and 600 4 BU4 may be varied conti...

Page 12: ...CONTINUOUS FREQUENCY CONTROL T528 29 PHASE SH F 80 AMPLITUDE CONTROL T530 T53LR 6 oscl aroR OUTPUT STAGE T532 ti SQUARER SCRMITT TRIGGER T561 63 1 OUTPUT STAGE T S6 65 R2I_R2II GANGED CONTINUOUS ATTEN UATOR AMP _ICIER T581 BG OUTPUT STAGE T585 86 SK2 WAVE FORM SELECTOR STEP ATTENUATOR SK4 8U4 60071 BU1 LOW Z M A 5045 Fig 3 Block diagram ...

Page 13: ...the earthing terminal BU12 marked on the rear panel c via he earthing terminal BU6 marked 1 on the front panel NOTE For operation as a single unit connect BU6 to BU7 The units of the modular system have asemi floating circuit so that the circuit need to be earthed at one point only when several units are coupled together Earth currents which may give rise to hum are thus avoided The terminals BU6 ...

Page 14: ...n in Hz is equal to the product of the setting of SK3 and the setting of RI Continuous control of the amplitude at both output terminals BUl and BU4 Switch for setting the attenuation of the ampli tude at terminal BU4 in four steps of 20 dB viz 60 dB 40 dB 20 dB and 0 dB Switch for selecting the output waveform at the terminals BU1 and BU4 The output voltage at this terminal may be varied continuo...

Page 15: ... dB by means of SK4 The output impedance is 600 S2 Input terminal for the external synchronisation signal Terminals to which the signal earth is connected Earthing terminals connected to Che metal frame of the cabinet The signal earth and the chassis earth may be connected by linking BU6 to BU7 Also refer to chapter V B Mains voltage selector Mains input terminal Mains output terminal SK3 R2 Fig S...

Page 16: ...00 n BU4 may be very low Both output terminals may be loaded simultaneously with a slight deterioration of the performance as indicated in chapter II TECHNICAL DATA in accordance with Fig 6 and the table below TABLE OF LOADS Nornea minimum oad impedance Maximum rurrenr 7 mA Absofure minimum oad impedance Maximum current t 23 mAJ Ra o0 Ra 600 S2 R6 00 Rp 600 7 Rp approaching 0 S2 Rp approaching0 S2...

Page 17: ...SELECTING THE OUTPUT VOLTAGE Select the waveform of the output voltage by means of the switch Set the attenuator switch dB SK4 to position 0 Adjust the amplitude of the output voltage at the terminals LOW Zo BUl and 600 S2 BU4 continuously by means of the attenuator AMPLITUDE R2 as indicated by the meter ML Adjust the amplitude of the output voltage at the terminal 6p0 S2 BU4 in steps of 20 dB by ...

Page 18: ... 600 S2 for optimum waveform in the case that the attenuator dB is set to its lowest position 60 dB 3 The trimming potentiometer R45 see Fig 12 controls the distortion and the settling time A lower distortion and a higher settling time are obtained when R45 is turned anti clockwise A higher distortion and a lower settling time are obtained when R45 is turned clockwise see Fig 7 i ID 09 OH 07 0 6 0...

Page 19: ... TS30 TS21 respectively Two identical frequency control circuits have been used The first one is connected between the collector and the emitter of TS22 and consists of the capacitors C21 C27 and the resistors R24 Rh R25 The second one is connected between the collector and the emitter of T525 and consists of the capacitors C28 C34 and the resistors R30 Rlrr R31 These networks provide each aphase ...

Page 20: ...y the input voltage V and the output voltage V6 are in phase The frequency is changed in steps of one decade by switching the capa citors C21 C27 and C28 C34 in steps by means of SK3 Continuous frequency control ratio 1 10 is effected by means of the double potentiometer Rlt Rltt The output amplitude may be adjusted with R40 and R42 The thermistor R44 keeps the output amplitude constant R42 is adj...

Page 21: ...ditions within the DC feed back loop without affecting the AC conditions B SQUARER See Fig 28 The sine wave signal coming from the oscillator and the selector switch SK2 is applied to the base of the transistor TS61 via the resisror R61 The transistor TS61 is clamped by means of the diode GR61 in such a way that only the negative part of the sine wave signal is applied to the Schmitt trigger TS62 ...

Page 22: ... signal is applied to the amplifier TS83 The constant current source TS8l in the collector line of TS83 provides the right DC conditions The signal amplified by TS83 is applied to the emitter follower TS84 A part of the signal present at the emitter of TS84 is fed back to the base of TS82 which results in an improved band width of the amplifier negative feedback The signal present at the emitter o...

Page 23: ... is 600 S2 for all positions of SK4 F POWER SUPPLY See Fig 29 The a c voltages from the transformer TI are rectified by the bridge circuits GR121 and GR122 The output d c voltages of x 30 V and 30 V are stabilised by comparing them with a reference voltage GR127 resp GR128 via a differential amplifier TS128 TS131 resp TS130 TS132 and by using the difference to control the current through the serie...

Page 24: ...e of the instrument C REMOVING THE BOTTOM PLATE j The bottom plate may be removed after loosening the appropriate screws at the rear of the cabinet D REMOVING THE STRIP WITH TILTING SUPPORT This strip may be removed by pushing the two nylon slides A in the 1 direction indicated in Fig 11 g J E REMOVING THE PLUGIN PRINTED WIRING BOARDS M In order to pull out the plug in printed wiring board of the ...

Page 25: ...they should first be slightly bent Furthermore four wires see Fig 12 should be loosened before removing the oscillator board Note When mounting the oscillator board make sure that the four wires from potentiometer RI are connected to this board in accordance with Fig 23 ...

Page 26: ... C27 C32 frequency counter PM 6630 D C34 C35 12 17B SINE WAVE R40 R42 R52 diode voltmeter GM 61100 E VOLTAGE 12 digital voltmeter PM 2421 DISTORTION OF R45 C84 SINE WAVE SQUARE WAVE VOLTAGE 12 13 distortion meter oscilloscope F PM 3231 G METER CIRCUIT 8101 R105 13 digital voltmeter PM 2421 H SYNCHRONISATION oscilloscope PM 3231 I Fig 12 Lejt hand view indicating the adjusting elements Fig Ij Right...

Page 27: ... R52 R40 R42 C35 R252 C25 C27 R105 R101 C84 37 5 R45 R249 M 6285 MA 62b1 ...

Page 28: ...on according to sections D and G is only possible when the covers are fitted on the instrument and after a warming up period of at least twenty minutes B MAINS CURRENT Connect the instrument to the mains and check that the current con sumption does not exceed 150 mA at 230 V mains or 300 mA at 115 V mains C SUPPLY VOLTAGES Remove the printed wiring board of the oscillator and that of the squarer a...

Page 29: ...at the frequency at terminal BU4 is respectively lU Hz 30 Hz and 100 Hz Tolerance 4 5 Set switch SK3 to position x 103 Set the frequency dial to position 10 Adjust the frequency at terminal BU4 to 10 kHz 0 2 by means of trimmer C25 Tf this is not possible select another value for C32 Set the frequency dial successively to positions 30 and 100 and check that the frequency at terminal BU4 is respect...

Page 30: ...o point 1 and note the output voltage Adjust trimmer R40 according to point 2 and compare this output voltage with the value noted 4 Repeat the adjustments until both values are equal Tolerance 1 Adjust trimmer R40 according to point 2 5 Set switch SK3 to position x 102 Set the frequency dial to position 50 Set attenuator R2 fully clockwise Adjust trimmer R52 so that the voltage between terminals ...

Page 31: ...t the frequency dial to position 10 Adjust the distortion to between 0 09 and 0 11 by means of trimmer R45 2 Check the distortion at the following settings of switch SK3 and of the frequency dial Position of switch SK3 Setting of the frequency dial Distortion x 1 10 0 25 x 103 100 0 3 x l04 60 1 G SQUARE WAVE VOLTAGE 1 Set switch SK2 to position Set switch SK3 to position x 102 Set attenuator R2 f...

Page 32: ...output voltage between terminals BU4 and BU7 is 10 VPP Adjust the meter reading to 0 V f 1 by means of RI05 2 Set switch SK2 to position Adjust attenuator R2 so that the output voltage between terminals BU4 and BU7 is 10 Vr s Adjust the meter reading to 10 V 50 mV by means of RI01 3 Adjust the output voltage between BU4 and BU7 successively to 8 V 6 V 4 V and 2 V by means of attenuator R2 Note the...

Page 33: ... instrument should be switched off After replacing parts it may be necesary to readjust the instrument according to chapter XI Checking and adjusting For gaining access to parts see chapter IX Note In case of break downs the assistance of the PHILIPS Service Organisation can always be called upon Whenever the instrument is to be forwarded to a PHILIPS Service Centre for repair the following should...

Page 34: ... I S 2 15 4822 462 70366 Slide 16 2 15 4822 460 60017 Ornamental strip 6 module length 17 1 14 4822 273 40224 Switch SK4 18 2 14 4822 413 40112 Knob l9 2 14 4822 413 70037 Cap 20 1 14 4822 413 40211 Knob 21 I 14 22 1 14 23 2 14 24 2 l4 25 2 14 26 2 14 I 4822 413 70037 Cap 4822 273 60079 Switch SK3 Screw for handle bar 4822 310 10044 Handle bracket Handle screw Washer for handle screw 27 2 4 4822 4...

Page 35: ... 1007 Mains flex with plugs 4822 263 70024 Mains interconnection link 4822 466 10165 Extension test board 38 I 14 4822 290 30111 Link 27 26 26 24 23 18 19 22 20 21 17 IB 19 38 Fig l4 Front view indicating the mechanical components 10 11 12 13 MAfi B2 Fig IS Stand assembly indicating the mechanical components 2B 29 30 31 32 33 MA6IBA Fig 16 Rear view indicating the mechanical components ...

Page 36: ...41 MA6288 Fig 17A Top view indicating the mechanical components C32 C34 34 35 36 MA6P87 Fig 178 Bottom view irzdicatirzg the mechanical components ...

Page 37: ... bobinfe Res unncia bobinada _ Grbon rnismr E13 series _ Wiraweund resistor Kohleschichtwidennnd Reihe E13 Koolweenond EI2 reeks axlrnnte av nrbone afri EI2 0 5 W 1 SMn S o 1snn lo Drahtwidenund Dnadgewnndan weennnd aetunnnbobinfe S SW X300 n 10 2do n s Rmisun ia de nrbdn aerie E13 Resls encia bobinada _ Tubular ceramic npacitor 0 ohrkondenntor Keramhche kondenntor bulatype Condenxteur cfnmique cu...

Page 38: ...822 116 50534 741 n 1 Metal film resistor R114 4822 116 50239 5 94 kS2 1 R115 4822 116 50535 733 SZ 1 R116 4822 116 50239 5 94 kf2 1 R117 4822 116 50345 660 Sl 1 Metal film resistor RI22 4822 116 50102 2 2 kS2 1 R236 482211130334 1 n 10 R237 4922 111 30334 1 f2 10 Carbon resistor R248 4622 116 50219 5 62 kf2 1 Metal film resistor R249 482210310058 250 S2 Potentiometer R250 4822 116 SOSl8 1 1 kR 1 ...

Page 39: ...Electrolytic CBS 4822 124 20381 68 µF 63 Electrolytic C86 4822 124 20423 1500 µF 16 Electrolytic C9l 4822 124 20388 160 µF 25 Electrolytic CI01 4822 124 20356 IS µF 63 Electrolytic C103 4822 124 20377 68 µF l6 Electrolytic C121 124 4822 l24 20404 330 µF 63 Electrolytic C127 4822 121 40224 4 7 µF 100 Polyester C128 4622 121 40224 4 7 µF 100 Polyester C129 4822 124 20384 100 µF 40 Electrolytic C130 ...

Page 40: ...4 Transistor TS125 BCY70 4822 130 40324 Transistor TS126 I32 BC107 4822 I JO 40184 Transistor TS141 142 BD123 4822 130 40518 Transistor If transistors T5141 TS142 arc replaced transistor type BUY62 may be used transistor BD123 is no longer available Ordering number BDY62 482 2 130 40717 MISCELLANEOUS Irem Ordering number Descripria LA1 TI VLI GL9 4822 146 20343 4822 253 30013 4822 253 30017 4822 2...

Page 41: ...ollowing units are available PM 5125 Generator Freyuency range Attenuator Output voltage Wave forms Width Suitable for use with Power amplifier Wide band transformer PM5160 Oscillator Freyuency range Output voltage Waveforms Attenuator Width Suitable for use with Wide band amplifier Power amplifier Monitored attenuator PM 5162 LF Sweep oscillator Frequency range Waveforms l0 Hz MHz 0 60 dB three s...

Page 42: ...bination with Oscillator Sweep oscillator Function generator Monitored attenuator PM S 75 Power amplifier Frequency range Max output 3 Vpp into 600 S2 continuous logarithmic 1 104 0 100 sec 3 modules PM 5170 width 1 module PM 5175 width 2 modules PM 5180 width 2 modules 0 5 mHz 5 kHz 3 Vpp into 600 S2 continuous logarithmic triangle wave square wave sine wave single shot external triggering 3 modu...

Page 43: ...t voltage Output voltage Input impedance Output impedance On off timing on I 99 cycles off I 99 cycles Suitable for use in combination with all instruments from the modular LF system 600 S2 and high impedance steps of 10 dB 2 modules PM 5160 width 2 modules PM 5162 width 3 modules PM 5168 width 3 modules 0 99 9 dB in 10 1 and 0 1 dB steps 60012 unbalanced 600 or 150 SZ balanced floating 10 Vrms DC...

Page 44: ...ld be ordered for each coupling connection to be mode Depending un the total width of the coupled units one of the following cover kits should also be ordered Type number Cover kit for a total width of PM 9502 I M 9503 PM 9504 I M 9505 PM 9506 l itr rmnple To be coupled Raluircd coupling accessories 2 modules 3 modules 4 modules 5 modules 6 modules one Z module unit two I module units two coupling...

Page 45: ...60 z s osciccaroR MA S t MA5060A Fig 23 Printed wiring board ajthe oscillator ...

Page 46: ...61 MA 5059A Fig 24 Printed wiring board of the squarer and the amplher ...

Page 47: ...62 C122 n nC 2 4d as C123 e w ma o PEM 4916 Fig 25 Panted wiring board of the power supply J I J ...

Page 48: ...Fig 26 Platine du circuit de instrument de mesure ...

Page 49: ... BCIOJ m v Rit 1 RJO r 11 aS RA t RfO Rlfi yPls 1 I A CIS C21 60 9 Cld R o 90 _ vv L 0 pIJ RES R fi Ril RI9 C I R31 RI2 p P35 P i IS fi 111 T 19fi I TB Y T RSO R56 P56 codes 1 1 1 I cu woK II u _ u u C S u u Rtllnl Il If I 41 u p1II u u u C IS tt MA6391 5RMi a INDICA EB SEIECi ON fE3i C36 IIJJ CC C33 SEtfti C I iROM Op Ip 6Bp Jp PqEiFRPEO SCIECi CJR PfOM Op I p SSp IJp PREFEPREO u c31 b c _ _b nsB...

Page 50: ...R61 BZYBB CIZV CBD IDBDHf RtT2 y TxT cDz Is r GR6fi Cfil 02YBBICTV6 JOOof I C62 1700f L05 68f CD CD3 16 y JSnF y lov Dv ti Sn2 BntTv wDlcn Es sL4ECT D T6s sEi6cr c vnD llov IlDavvR6FERREDI wl I c EEs setEcr on 3Esr Sttk T Rl0 FROM ln4 10913B YRtFERREU INDICATES Sttt r ON iESi SELE T R8I FROM N 09 13n9 PRtfERRED 72 BSI tow e Fig 28 Circuit diagram of the squarer the amplifier and the meter circuit ...

Page 51: ...F T569 J I Cfii t tbF Cfit e C66 IDDpT ISNF _ LD2 16 I CD2 B L 1 C02IG 2 nF C89 W CD 6 Ov I s 9E ECi DN 2Esi SELECi C9t LRM Op 130p IIOUpPREFERRED R i INDicaiEs 5 ON tESi SELECL R 0 LROM 2K4 3K913K GFEFERRED7 INUICaiE9 9ElECt ON tE Si SEIECi RB2 FROM lK K9 13K9 PkEFER P E 01 Rnl 4MPtIiUDE dB z BUI tOw e r 1 9D Bunn 9U Fig 28 Circuit diagram of the squarer the amplifier and the meter circuit ...

Page 52: ... e Lc i Ri e c sc iDT Ri 5P1 Te ru c an pee CDS 7 CDS 6 1 T5147 CDS e CDS II OY 79 5 TFt u _ cove icv CDs 16 oau Ana cili l H CIl ll0 ally i31 PC iDl TT e 9 R1J1 CIB REJS ecr TD eaol Rl1l 0 R T5143 BD lal cos n CDS te cos u cola nisi a 5 D I U u T i R35 MA5Cti3 Frg 29 Cbcuit diagram of the power supply ...

Page 53: ...I11 02vee G7Rll cu Y R1N R1H TeZ eclo2 rsm echo eclol a11e 110 auo cl s al IOpa 1 CDS 6 cpe e CDe 11 zee P cu 1 ecim P1 I R1 s enm T 4 ezrTe R1 e R1 Rzsc e nn cm p0a 79 Te _Itl BD11 s v N rF cc _ sERv e r Ta r CDe 9 OV Cp6 18 1513 0012 CDe 1 CDe 15 CDS C N GHQ 81 to R1 1_ T o o a Cos ti w 10V MAS d3 Fig 29 Circuit diagram of the power supply ...

Page 54: ... __ Sa pORqN m a 1Wh11UDE eREFTY FRRTX 1scnu F RTN 1 N I F RTN iRFOVFNCv NR n nqe CD jr L _o SQUARER AMPLIFIER PWB I v6 o R ttD F L eNi i Sx Fe ON Wx Ix PO METER PW B C 91i 0 CDI 11 D cogm o D nF b iW POWER SUPPLY PWB UNFR ON SRI T1 pl ep O Tp p ep o o0 os I o c o DCD1 IM POVEq OUi nx SO BP BU Fig 30 Overa drngram ...

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