Philips PM 3266 User manual

!PHILIPS
Portable Storage oscilloscope
PM 3266
JInstruction Manual 9499 440 19702 781108'
•/
i
PHILIPS

Instruction manual
Geratehandbuch
Notice d’emploi ’entretien
Portable dual trace storage oscilloscope
Tragbarer Zweistrahl -Speicheroszillograf
Oscilloscope, double trace portatif amemoire
PM3266
PHILIPS
9499 440 19702 781108

2
IMPORTANT
In correspondence concerning this instrunnent. please quote the type number and serial number as given on the
type plate.
WICHTIG
Bei Schriftwechsel uber dieses Gerat wird gebeten, die genaue Typenbezeichnung und die Geratenummer
anzugeben. Diese befinden sich auf dem Leistungsschiid.
IMPORTANT
RECHANGE DES PIECES DETACHEES (Reparations)
Dans votre correspondance et dans vos reclamations se rapportant acet appareil, veuillez TOUJOURS indiquer
le num6ro do type et le num^ro de serie qui sont marquis sur la plaquette de catacleristiques.
/Vote: The design of this instrument is subject to continuous development and improvement.
Consequently, this instrument may incorporate minor changes in detail from the information
contained in this manual.
Bemerkung: Die Konstruktion und Schaltung dieses Gerats wird standig weiterentwickelt und verbessert.
Deswegen kann dieses Gerat von den in dieser Anleitung stehenden Angaben abweichen.
Remarques: Cet appareil est I'ohjet de dSveloppements et ameliorations continuels. En consiquence,
certains details mineurs peuvent diffSrer des informations donnees dans la presente notice
d'emploi et d'entretien.
©N.V. PHILIPS' GLOEILAMPENFABRIEKEN -EINDHOVEN -THE NETHERLANDS 1978
PRINTED IN THE NETHERLANDS

3
CONTENTS
1. GENERAL INFORMATION 9
1.1. Introduction g
1.2. Characteristics Iq
1.2.1. C.r.t. section 10
1.2.2. Vertical or Yaxis H
1.2.3. Horizontal or Xaxis I3
1.2.4. Main time-base I3
1.2.5. Delayed time-base 14
1.2.6. Xdeflection 15
1.2.7. Triggering of the main time-base 15
1.2.8. Triggering of the delayed time-base 16
1.2.9. Calibration unit 16
1.2.10. Additional Input and Outputs 16
1.2.11. Power supply 17
1.2.12. Environmental characteristics 17
1.2.13. Mechanical data 17
1.3. Accessoires 19
1.3.1. Accessoires delivered with the instrument 19
1.3.2. Optional accessoires 19
2. OPERATING MANUAL 21
2.1. General information 21
2.1.1. Installation 21
2.1.2. Removing and fitting the front cover 21
2.1.3. Mains adjustment and fuse 21
2.1.4. Earthing 21
2.1.5. Switching on 26
2.2. Operating instructions 27
2.2.1. Controls and sockets 27
2.2.2. Preliminary settings 32
2.2.3. Inputs Aand Band their possibilities 32
2.2.4. Triggering 33
2.2.5. Time-base magnifier 34
2.2.6. Use of the delayed time-base 34
2.2.7. Use of the alternate time-base 35
2.2.8. Use of the 3rd channel TRIGGER VIEW 35
2.2.9. Operation of the storage functions 36
3. SERVICE MANUAL 97
3.1. Description of the block diagram 97
3.2. Circuit description 105
3.2.1. Vertical Deflection System 105
3.2.1. 1. Input coupling 105
3. 2. 1.2. Input attenuator and impedance converter 105
3. 2. 1.3. Intermediate amplifier 106
3. 2. 1.4. Trigger pick off and trigger source selection 107

4
3.2.1. 5.
3.2. 1.6.
Vertical display mode logic
Delay line driver 108
111
111
3.2.I.7. Final Y-amplifier
3.2.2. Main-time base triggering 112
3.2.2.I. Main-time base trigger source selector and preamplifier 112
3.2.2.2. Main-time base trigger amplifier 113
3.2.3. Main-time base generator 113
3.2.3. 1. Free run auto circuit 114
3.2.3.2. Single shot mode 115
3.2.4. Delayed time-base triggering 115
3.2.4.I. Delayed time-base trigger source selector and preamplifier 116
3.2.4.2. Delayed time-base trigger amplifier 116
3.2.5. Delayed time-base generator 117
3.2.5.I. Delayed time-base sweep generator 117
3.2.5.2. Delayed time-base end of the sweep detection circuit 118
3.2. 5.3. Delay time function 118
3.2.5.4. Comparator circuit and sweep gating logic 118
3.2.6. Xdeflection selector and alternate time-base logic 118
3.2.7. XFinal amplifier 120
3.2.8. Storage section 121
3.2.8.I. Introduction 121
3.2.8.2. Functioning of the storage system 121
3.2.S.3. Pulse Generation and Control for Storage Modes 127
3.2.9. ZAmplifier and Focus Amplifier 136
3.2.10. Power supply 138
3.3. Dismantling the instrument 140
3.3.1. General Information 140
3.3.2. Removing the cabinet plates and the screen bezel 140
3.3.3. Removing the knobs 140
3.3.3.I. Single knobs 140
3.3.3.2. Double knobs 140
3.3.3.3. Delay-time multiplier knob 140
3.3.4. Removing units on the bottom side of the instrument 141
3.3.4.I. Storage logic (unit 22) 141
3.3.4.2. Attenuator (unit2) 141
3.3.4.3. Trigger source selector (unit 16) 141
3.3.4.4. Intermediate amplifier (unit 12) 141
3.3.4.5. Z-Amplifier (unit 11
)
141
3.3.4.6. Additional power supply (unit 24) 141
3.3.4.7. Focus unit (unit 7) 141

-
5
3.3.4.8. E.H.T. unit (unit 15) 142
3.3.5. Removing the Power supply (unit 5) 142
3.3.6. Removing units on the top side of the Instrument 142
3.3.6. 1. Storage amplifier unit (unit 25) 149
3.3.6.2. Trigger amplifier unit (unit 9) 142
-3.3.6.3. Final X-amplifier (unit 26) 142
3.3.6.4. Time-base unit (unit 8) 142
3.3.6.B. Final Y-amplifier (unit 13) 142
3.3.6.6. Delay line (unit 4) 142
3.3.7. Removing the cathode ray-tube (CRT) 143
3.3.8. Replacing apush-button switch 144
-3.3.9. Removing the carrying handle 145
3.3.10. Soldering micro-miniature semi-conductors 146
3.3.11. Special tools 147
3.4. Checking and Adjusting 148
3.4.1. General Information 148
3.4.2. Recommended test equipment 148
3.4.3. Preliminary control settings 148
3.4.4. Power supply 148
3.4.4.I. Power consumption 148
3.4.4.2. +12,7 Vsupply voltage (unit 5) 148
3.4.4.3. Cathode voltage (unit 11
)
149
-3.4.5. Calibration socket 149
3.4.6. Cathode-ray tube circuit 149
3.46.1. Focus and horizontal intensity 149
3.4.6.2. Trace rotation 149
3.4.6.3. Orthogonality (unit 26) 149
3.4.6.4. Geometry 149
3.4.6.5. Intensity (unit 11) 150
3.4.6.6. Intensity ratio (unit 8) 150
"3.4.7. Balance adjustments 150
3.4.7.I. 0-DC Balance (Att. unit) 150
3.4.7.2. Attenuator-balance (Atten. unit) 150
3.4.7.3. Continue balance (unit 12) 151
3.4.7.4. Balance 5mV/div (unit 12) 151
-3.4.7.5. Polarity (Norm/Invert) balance (unit 12) 151
3.4.7.6. Trigger balance main time-base (unit 12) 151
3.4.7.7. Trigger balance delayed time-base (unit 12) 151
—3.4.7.8. Yposition correction (unit 13) 152
34.7.9. TB MAGN balance (unit 8) 152
~3.4.8. Time-base generators 152
3.4.8.I. Main time-base time coefficients (unit 8) 152
3.4.8.2. Delayed time-base time coeficients (unit 8) 153
3.4.S.3. Delay time (unit 9) 153
3.4.8.4. Alternate time-base and trace separation 154
3.4.9. Sensitivities 154
-

6
3.4.9. 1. Gain via X154
3.4.9.2. Gain via Y154
3.4.9.3. Gain Yg via Y154
3.4.9.4. Gain at external Xdeflection 155
3.4.9.B. Gain external triggering via TRIG VIEW 155
3.4.9.G. Gain Y^ via TRIG VIEW 155
3.4.9.7. Gain Yg via TRIG VIEW 155
3.4.9.S. Gain Yg via X155
3.4.10. Vertical channels 155
3.4.10.1. L.F. Correction amplifier 156
3.4.10.2. Square-wave response 156
3.4.10.3. Input capacitance 156
3.4.10.4. Square-wave response final Yamplifier 157
3.4.10.5. Square-wave response channel A157
3.4.10.6. Square-wave response channel B158
3.4.10.7. Bandwidth 159
3.4.10.8. Common-mode rejection 159
3.4.10.9. Dynamic range and position range 159
3.4.10.10. Chopped mode 159
3.4.10.11. Alternate mode 160
3.4.10.12. Square-wave response trigger view via channel A(B) 160
3.4.10.13. Bandwidth trigger view via channel A(B) 160
3.4.10.14. Bandwidth trigger view via external input 160
3.4.11. Triggering 161
3.4.11.1. Trigger slope and level of the m.t.b. 161
3.4.11.2. Trigger sensitivities m.t.b. 161
3.4.11.3. Single-sweep operation 162
3.4.11.4. Triggering at mains frequency 162
3.4.11.5. Trigger slope and level of the d.t.b. 162
3.4.11.6. Trigger sensitivities d.t.b. 163
3.4.12. Jitter 163
3.4.13. Periodic and random deviations 163
3.4.14. Effect of the mains voltage variations 164
3.4.15. Horizontal amplifier 164
3.4.15.1. Bandwidth 164
3.4.15.2. Phase difference 164
3.4.16. Adjustment of the storage section 167
3.4.16.1. Introduction 167
3.4.16.2. Non store mode adjustment 167
3.4.16.3. Variable persistence mode adjustment 167
3.4.16.4. Fast mode adjustment 167
3.5. Information concerning accessoires 174
3.5.1. Attenuator probe set delivered with the instrument 174
3.5.2. Adapter PM 9051 179
3.5.3. Trimming tool kit 179

3.6. Extra input and outputs
3.6.1. Introduction .^gg
3.6.2. Main time base gate output ^00
3.6.3. Delayed time base gate output .[00
3.7. Maintenance
3.8. Parts lists and diagrams 1g0
3.8.1. Mechanical parts Igg
3.8.2. Electrical parts and diagrams 135
List of figures
Fig. 1.1. Portable dual-trace storage oscilloscope PM 3266 9
Fig. 1.2. Derating of the maximum permissible input voltage as a function of frequency 1
8
Fig. 1.3. Typical trigger sensitivity of channel Aas afunction of frequency 18
Fig.. 2.1. Removing front cover 20
Fig. 2.2. Rear view of the instrument 20
Fig. 2.3. Front view showing controls and sockets 24
Fig. 2.4. Scanning the wave form by means of the LEVEL potentiometer 34
Fig. 3.1. Block diagram 94
Fig. 3.2. Voltage waveforms applied to the storage electrodes of the CRT in the WRITE mode 100
Fig. 3.3. Voltage waveforms applied to the storage electrodes of the CRT in the FAST mode 102
Fig. 3.4. Vertical deflection system 105
Fig. 3.5. Vertical display mode logic 108
Fig. 3.6. Generation of control pulses 110
Fig. 3.7. Main time base trigger circuit 112
Fig. 3.8. Main time base generator 113
Fig. 3.9. Delayed time base trigger circuit 115
Fig. 3.10. Delayed time base generator 117
Fig. 3.11. X-deflection selector and alternate time base logic 118
Fig. 3.12. Final X-amplifier 120
Fig. 3.13. Pushbutton switch decoder truth table 127
Fig. 3.14. Write mode, voltage waveforms applied to storage electrodes 129
Fig. 3.15. Fast mode, voltage waveforms applied to storage electrodes 131
Fig. 3.16. Store mode, voltage waveforms applied to storage electrodes 134
Fig. 3.17. CRT controls trace rotation and geometry 137
Fig. 3.18. Removing the knobs 140
Fig. 3.19. Pushbutton set clamping device 144
Fig. 3.20. Replacing aswitch-segment of apushbutton-set 144
Fig. 3.21. Dimensional drawing of SOT-23 146
Fig. 3.22. Tool for attenuator unit 147
Fig. 3.23. Tool for positioning potentiometer 147
Fig. 3.24. Orthogonality check 165
Fig. 3.25. Geometry check 165
Fig. 3.26. Position of the intensity potentiometer 165
Fig. 3.27. 2:1dummy probe 165
Fig. 3.28. Phase difference in X-Y mode 165
Fig. 3.29. Adjustment of the variable persistence and store mode 166
Fig. 3.30. Adjustments of the fast mode 169
Fig. 3.31. Unit lay-out and adjustment points, bottom view 170
Fig. 3.32. Unit lay-out and adjustment points, top view 171
Fig. 3.33. Input resistance and reactance versus frequency 174
Fig. 3.34. Max. AC component of input voltage as a function of frequency 174
Fig. 3.35. Adjusting C2 of att. probe 175

6b
Fig. 3.36. Adjusting H.F. step response of att. probe 175
Fig. 3.37. Dismantling the probe 176 _
Fig. 3.38. Mechanical parts of the probe 177
Fig. 3.39. Electrical parts of the probe 178
Fig. 3.40. Adapter BNC/Banana PM 9051 179 -
Fig. 3.41. Trimming tool kit 800 NTX 179
Fig. 3.42. Mechanical item numbers, front view 182
Fig. 3.43. Mechanical item numbers, rear view 182 -*
Fig. 3.44. Vertical attenuator (unit 2), component side lay-out 221
Fig. 3.45. Vertical attenuator (unit 2), conductor side lay-out 221
Fig. 3.46. Vertical attenuator (unit 2), mechanical lay-out 222
Fig. 3.47. Mains filter, power supply and EHT unit (unit 3,5 and 15), lay-out 224
Fig. 3.48. Focus unit (unit 7), lay-out 226
Fig. 3.49. Time base unit (unit 8), lay-out 228
Fig. 3.50. Trigger amplifier (unit 9), lay-out 229
Fig. 3.51. Z-amplifier (unit 11), lay-out 232
Fig. 3.52. Intermediate amplifier (unit 12), lay-out 233
Fig. 3.53. Final Y-amplifier (unit 13), lay-out 235
Fig. 3.54. Trigger source unit (unit 16), lay-out 236
Fig. 3.55. Storage logic (unit 22), lay-out 237
Fig. 3.56. Additional power supply (unit 24), lay-out 238
Fig. 3.57. Storage amplifier (unit 25), lay-out 240
Fig. 3.58. Final X-amplifier (unit 26), lay-out 241
Fig. 3.59. Wiring diagram 245
Fig. 3.60. Vertical channels, circuit diagram 253
Fig. 3.61. Time bases and horizontal amplifier, circuit diagram 260
Fig. 3.62. Storage system, circuit diagram 267
Fig. 3.63. Z-amplifier, focus and power supply, circuit diagram 273

INHALTS VERZEICHNIS (der Bedienungsanleitung)
1. ALLGEMEINES 3g
1.1. Einleitung 3g
1.2. Technische Daten
1.2.1. Bildteil
1.2.2. Vertikale Oder Y-Achse 4^
1.2.3. Horizontale Oder X-Achse 43
1.2.4. Hauptzeitablekung 44
1.2.5. Verzogerte Zeitablenkung 44
1.2.6. X-Ablenkung 4g
1.2.7. Triggerung der Hauptzeitablenkung 40
1.2.8. Triggerung der verzogerten Zeitablenkung 45
1.2.9. Kalibrierungseinheit 45
1.2.10. Eingange/Ausgange an Ruckseite 47
1.2.11. Speisung 47
1.2.12. Einflussgrossen 47
1.2.13. Mechanische Daten 49
1.3. Zubehor 49
1.3.1. Mit dem Gerat geliefertes Zubehor 49
1.3.2. Wahizubehbr 49
2. BEDIENUNGSANLEITUNG 51
2.1. Allgemeines 51
2.1.1. Inbetriebnahme 51
2.1.2. Abnehmen und Aufsetzen der Abdeckhaube 51
2.1.3. Netzspannungseinstellung und Sicherung 51
2.1.4. Erdung 51
2.1.5. Einschalten 52
2.2. Bedienungsanweisungen 53
2.2.1. Bedienungsorgane und Buchsen 53
2.2.2. Vorbereitende Einstellungen 58
2.2.3. Eingange Aund Bihre Moglichkeiten 58
2.2.4. Triggerung 59
2.2.5. Dehnung der Zeitablenkung MAGN. 60
2.2.6. Gebrauch der verzogerten Zeitablenkung DEL. T.B. 60
2.2.7. Gebrauch der alternierenden Zeitablenkung ALT. T.B. 61
2.2.8. Gebrauch des dritten Kanal TRIGGER VIEW 61
2.2.9. Bedienung der Speicherfunktionen 62
3. SERVICE MANUAL (nur aufs Englisch)
Abb. 1.1. Tragbares Zweistrahl-Speicher oszilloskop PM 3266 39
Abb. 1.2. Minderung der hochstzulassigen Eingangsspannung 48
Abb. 1.3. Typische Ablenkempfindlichkeit fur interne Triggerung iiber Kanal A48
Abb. 2.1. Abnehmen der Abdeckhaube 50
Abb. 2.2. Ruckansicht des Gerats 50
Abb. 2.3. Vorderansicht mit Bedienungsorganen und Buchsen 24
Abb. 2.4. Abtasten der Wellen form mittels des LEVEL potentiometers 60