Informations de l’équipement

Philips PM3240 Oscilloscopes
Fabricant:
Modèle:
PM3240
Date :
1976
Catégorie :
Groupe:
Description :
50MHz dual channel oscilloscope

Informations

The PM 3240 Portable h.f. Oscilloscope enables the measurement of signals at a high sensitivity (5 mV/DIV) over a large bandwidth (50 MHz). There is a wide choice of display possibilities, such as one channel, two channels alternately or chopped, two channels added, with normal and inverted position for one input signal, and a main and delayed time-base. The PM 3240 Oscilloscope features a tapless Power supply with low dissipation. This Power supply works on any AC mains voltage between 90 V and 264 V, or any DC voltage between 100 V and 350 V, thus obviating the need of adjusting the instrument to the local mains voltage. All these features make the Oscilloscope suitable for a wide variety of applications.

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Service et Manuel de l'utilisateur
Type manuel:
Service et Manuel de l'utilisateur
Pages :
151
Taille:
15.26 Mbytes (16001542 Bytes)
Langue :
english, german, french
Révision:
Manuel-ID:
9499 440 20302
Date :
15 septembre 1979
Qualité:
Document scanné, tous les lisible.
Date de téléchargement:
31 juillet 2020
MD5:
c02677711bffefe681a3e86256c74368
Téléchargements:
427

Informations

1. GENERAL INFORMATION 9 1.1. Introduction 9 1.2. Characteristics 10 1.2.1. C.r.t. 10 1.2.2. Vertical or Y axis 10 1.2.3. Horizontal or X axis 11 1.2.4. Main time-base 11 1.2.5. Delayed time-base 12 1.2.6. X deflection 12 1.2.7. Triggering of the main time-base 12 1.2.8. Triggering of the delayed time-base 13 1.2.9. Calibration unit 13 1.2.10. Power supply 13 1.2.11. Environmental capabilities 13 1.2.12. Mechanical data 14 1.2.13. Accessories 14 2. DIRECTIONS FOR USE 17 2.1. Installation 17 2.1.1. Removing and fitting the front cover 17 2.1.2. Mains voltage and fuse 17 2.1.3. Earthing 17 2.1.4. Switching on 17 2.2. Operating instructions 18 2.2.1. Controls and sockets 18 2.2.2. Preliminary settings 22 2.2.3. Inputs A and B and their possibilities 22 2.2.4. Triggering 23 2.2.5. Time-base magnifier 24 2.2.6. Use of the delayed time-base 1 24 3. SERVICE MANUAL 57 3.1. Description of the block diagram 57 3.2. Circuit description 59 3.2.1. Vertical deflection system 59 3.2.1.1. Input attenuator 59 3.2.1.2. Intermediate amplifier 64 3.2.1.3. Channel selection logic 65 3.2.1.4. Final Y amplifier 66 3.2.2. Main time-base triggering 67 3.2.2.1. Trigger input circuits and amplifier 67 3.2.2.2. Trigger amplifier and multivibrator 67 3.2.2.3. Auto-circuit 68 3.2.3. Main time-base generator 68 3.2.3.1. Sweep gating multivibrator 68 3.2.3.2. Switching transistors TS868, TS869 and TS870 68 3.2.3.3. Sweep speeds 68 3.2.3.4. Sawtooth take-off circuit 69 3.2.3.5. Hold-off circuit 69 3.2.3.6. NOT TRIG'D indicator 69 3.2.3.7. Delay-time function 70 3.2.4. Delayed time-base triggering 70 3.2.5. Delayed time-base generator 70 3.2.5.1. Sweep speeds 70 3.2.5.2. Hold-off circuit 70 3.2.5.3. Comparator 70 3.2.5.4. Delay time calibration unit 70 3.2.6. X-Deflection selector and blanking switching circuits 70 3.2.6.1. X-Deflection source selector 70 3.2.6.2. Blanking pulse switching circuit 71 3.2.7. Pre-amplifier for external X-deflection 72 3.2.8. X-amplifier 72 3.2.9. C.R.T. circuits 72 3.2.9.1. Z modulator circuit 72 3.2.9.2. Focusing circuit 73 3.2.9.3. H.T. Converter 73 3.2.9.4. Calibration unit 74 3.2.9.5. Graticule illumination control circuit 74 3.2.10. Power supply 74 3.2.10.1. Mains rectifier and ripple eliminator 74 3.2.10.2. Switching series regulator 74 3.2.10.3. Chopper circuit 75 3.2.10.4. Error sensing and regulator circuit 75 3.2.10.5. Current limiting circuit 76 3.2.10.6. Switching-on voltage-sensing circuit 76 3.2.10.7. Secondary supply voltages 76 3.2.10.8. Mains triggering opto-isolator 76 3.2.11. Optional MTB gate output, DTB gate output and external Z modulation 77 3.3. Dismantling the instrument 79 3.3.1. General information 79 3.3.2. Instrument cover plates and screen bezel 79 3.3.3. Removing the knobs 79 3.3.4. Time-base and X amplifier circuit board 79 3.3.5. Z Amplifier circuit board 82 3.3.6. Intermediate amplifier circuit board 82 3.3.7. Final Y amplifier circuit board 82 3.3.8. 2kV Convertor 82 3.3.9. 8kV Multiplier 82 3.3.10. Power supply circuit board 82 3.3.11. Delay line 83 3.3.12. Cathode ray tube 83 3.3.13. Push-button switches 83 3.3.14. Trigger source unit 84 3.3.15. Attenuator unit 84 3.3.16. Carrying handle 84 3.3.17. Special tools 84 3.3.18. Soldering micro-miniature semi-conductors 86 3.4. Survey of adjusting elements and auxiliary equipment 87 3.5. Test and repair hints 95 3.5.1. Control settings for waveforms 95 3.5.2. General information 95 3.5.3. Y-amplifier 95 3.5.4. 3.5.5. 3.6. 3.7. 3.7.1. 3.7.1.1. 3.7.1.2. 3.7.1.3. 3.7.1.4. 3.7.1.5. 3.7.1.6. 3.7.1.7. 3.7.2. 3.7.2.1. 3.7.2.2. 3.7.2.3. 3.7.2.4. 3.7.3. 3.7.4. 3.7.5. 3.7.6. 3.7.7. Time-base and X-amplifier 95 Instability 96 Maintenance 96 Checking and adjusting 97 Performance check 97 Preliminary control settings 97 Cathode-ray tube 97 Vertical axes 97 Main time-base generator 99 Delayed time-base generator 101 X Deflection 102 Mains voltage fluctuations 103 Adjusting procedure 103 Preliminary control settings 103 Power supply 104 Checking procedure 104 Waveforms in the power supply 106 Cathode-ray tube circuit 108 Trace rotation Brilliance Brilliance ratio Focus and astigmatism Geometry Vertical deflection 108 Input attenuators DC/0 balance Attenuator balance Variable gain balance 20kHz square wave response 100kHz square wave response Input capacitance adjustment Intermediate and final Yamplifier 110 Gain channel A (B) Polarity balance channel B Square wave response channel A (B) Triggering (M.T.B.) 111 Horizontal deflection 111 Main time base: Stability Time coefficients Linearity and horizontal positioning Gain adjustment DC output level adjustment Delayed time base: Stability Time coefficients Delay time Delay time-calibration X deflection with the mains signal Calibration unit 114 3.8. Parts lists 114

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Supplément manuel de réparation
Type manuel:
Supplément manuel de réparation
Pages :
4
Taille:
1.11 Mbytes (1165313 Bytes)
Langue :
english
Révision:
Manuel-ID:
751115 and/or CD869
Date :
Qualité:
Document scanné, tous les lisible.
Date de téléchargement:
10 novembre 2008
MD5:
dac3277819258151fd87797af214aa56
Téléchargements:
93
Supplément manuel de réparation
Type manuel:
Supplément manuel de réparation
Pages :
9
Taille:
1.17 Mbytes (1222516 Bytes)
Langue :
english
Révision:
Manuel-ID:
CD 911
Date :
15 octobre 1976
Qualité:
Document scanné, tous les lisible.
Date de téléchargement:
15 mars 2008
MD5:
df54fe91a044839dc6975f6300e82838
Téléchargements:
3351

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