![Fluke PM3082 Скачать руководство пользователя страница 67](http://html.mh-extra.com/html/fluke/pm3082/pm3082_service-manual_2310514067.webp)
5.1 -12
UNIT DESCRIPTIONS
Diagram 16
This diagram indicates the timing circuits for the MTB. The principle of the time base is that a
capacitor is charged with a constant current. This gives a time-linear voltage across the capacitor;
the so- called sawtooth or sweep signal. The timing capacitance consists of C6011 that is always in
circuit and C6012, C6013 that are activated via the switching transistors V6016 and V6019. The MTB
control is done in IC D6011.
The constant current is supplied via transistor V6003 and V6005. The current source consists of
voltage divider R6002 through R6007 with precision resistors. The voltage across this divider can be
influenced by DAC output voltage MTBVAR via N6007/5,6,7 and V6001. This is necessary for
continuous time/div control (VAR) and calibration. The voltage on a tap of the voltage divider can be
selected via multiplexer D6001. This voltage (MCSCONTROL) is applied to the base of V6003 and
V6004. This occurs via operational amplifier N6006. Via multiplexer D6002 two different emitter
resistance values can be selected for V6003 and another two for V6004. The resistance values differ
by a factor of 10: the emitter resistance for V6003 is switchable between R6014 (time base magnifier
x10) and R6013 (magnifier x1). The emitter resistance for V6004 is switchable between R6016 (time
base magnifier x10) and R6015 (magnifier x1).
The current from V6004 is applied to pin 16 of D6011 and is used as a reference. The sawtooth that
is generated across the timing capacitor(s) is applied to pin 18 of D6011. Inside this IC is the time
base switching transistor. The start of the sawtooth is initiated by signal MTBGATE that is applied to
pin 20 of D6011. The sawtooth is also applied to pin 17 and converted into a balanced output signal
that is available pin 12 and 13. The MTB sweep pickoff circuit consists of Source follower V6013 (and
matching V6014) and emitter follower V6012. Horizontal position control is achieved via DAC output
signal TBXPOS at pin 14.
Input signal TBCALREF at D6011/28 and output signal MTBCALTST at D6011/24 provide
autocalibration of the time base. The sweep is switched on via STRCALM-HT and MTBGATE and
compared with reference voltage TBCALREF. Via switching of output signal MTBCALTST, the
microprocessor knows if the current source delivers the correct current. In case of inaccuracies the
microprocessor makes corrections.
The start of the DTB is initiated by a low level of signal TBSTD-LX at pin 1 of D6011. The signal is
generated via comparison of the MTB sawtooth signal and the adjustable DC voltage DTBM (delay
time multiplier). The DTBM signal is coming from DAC output N6014/6 via operational amplifier
N6008/5,6,7.
The signal TBEOM-HX at pin 4 of D6011 becomes high at the end of the MTB sweep. The signal
TBEOHO-LX at pin 5 of D6011 becomes low at the end of the hold off period. The length of the hold
off period is determined by the DAC output voltage HOLDOFF that is applied to D6011/7.
The MTB is switched on by making MTBONOFF (D6011/11) high. This signal is derived from control
signal TBSEL. TBSEL is high during X deflection by the MTB and low during DTB. The MTB is also
off in external X- deflection mode.
V6006 is on during the fast time base positions. It activates a stabilizing circuit that is connected with
D6011/21.
The circuit with V6042 and C6033 assures that the hold off time in the fastest time base positions will
never become shorter than 3 us. The circuit with C6035, V6002, C6017, V6008 and C6415 is
responsable for the hold off timing. C6035 is always in circuit and C6017 and C6415 are activated by
switching transistors. The capacitors are charged in parallel with the MTB timing capacitors. During
the hold-off time that follows they are discharged by a current source inside D6011. The hold- off time
can be varied by varying the discharging current.
Содержание PM3082
Страница 34: ...DESCRIPTIONS 3 1 ST8235A 970415 ...
Страница 35: ...DESCRIPTIONS r _A1 SIGNAL UNIT TRIGGERING ...
Страница 36: ...3 1 TIME BASES ST8235A 970415 ...
Страница 37: ...3 2 DESCRIPTIONS ST82358 97041S ...
Страница 38: ...XYSW ...
Страница 79: ...5 1 22 UNIT DESCRIPTIONS Lay out 2 Small component side of signal unit A1 ...
Страница 93: ...5 1 33 09001 2 01201 3 01201 5 C 1 O 6 0 T 10n A1 Diagram 1 Attenuator CH 1 PM3094 PM3092 ...
Страница 95: ...1 5 0 0I AC DC HIGH IMPEDANCE ATTENUATOR R20Q2 12AT2 l i C2005 180u C2O06 1 0 n 12AT2 l i C2068 10n ...
Страница 96: ...5 1 34 UNIT DESCRIPTIONS 09001 17 A1 Diagram 2 Attenuator CH 2 PM3094 PM3092 ...
Страница 99: ...5 1 35 X I STB241 970420 A1 Diagram 2a Attenuator CH 1 PM3094 PM3092 ...
Страница 100: ...5 1 36 UNIT DESCRIPTIONS 12AT3 12AT3 STQ24S 970420 Diagram 3 Attenuator CH 3 PM3094 ...
Страница 101: ...J a C3077 I I T b M A AT350C N1101 2AT3 12AT3 ...
Страница 102: ...5 1 36 UNIT DESCRIPTIONS 12AT3 STB242 970420 Diagram 3 Attenuator CH 3 PM3094 ...
Страница 103: ...UNIT DESCRIPTIONS K x jr w o n m 310 I B4012 E OPT i I C406S I C4067 1 M u 0 4 0 8 6 L 1 8 0 u 25V i r i K4001 ...
Страница 104: ...5 1 37 12AT4 D4201 3 D4201 5 ST8243 97D420 Diagram 4 Attenuator CH 4 PM3094 ...
Страница 105: ...UNIT DESCRIPTIONS C4071 lOn C4072 lOn AC DC f HIGH IMPEDANCE ATTENUATOR LF IMPE CONVE R40Q2 ...
Страница 106: ...5 1 37 100 T I C4071 lOn 12AT4 04201 3 04201 5 m C4068 lO n STB243 970420 Diagram 4 Attenuator CH 4 PM3094 ...
Страница 107: ... 12AT 12AT4 l i C4067 160u 25V C4068 10n K4002 ...
Страница 109: ...I i 04097 1 0 O u 25V J 25V 10n 25V ...
Страница 111: ...UNIT DESCRIPTIONS PROBE CALIBRATOR GNDREF IOVREF j C 1 5 180u 25V J 25V C1157 100n GNDREF GNDREF ...
Страница 113: ...UNIT DESCRIPTIONS PROBE CALIBRATOR GNOR6F f 1CVREF f C11S0 180u 25V C1157 10 0n GNDREF GNDREF ...
Страница 115: ...5 1 40 UNIT DESCRIPTIONS Diagram 6 Preamplifier CH 1 and CH 2 ...
Страница 116: ...PAOREF N32Q2 12 ...
Страница 117: ...5 1 40 UNIT DESCRIPTIONS Diagram 6 Preamplifier CH 1 and CH 2 ...
Страница 118: ...UNIT DESCRIPTIONS 5 1 41 l GAIN CONTROLVAR X1 2 X5 Diagram 7 Preamplifier CH 3 and CH 4 ...
Страница 119: ...UNIT DESCRIPTIONS ...
Страница 120: ...5 1 41 PMVAR ft4220 Diagram 7 Preamplifier CH 3 and CH 4 ...
Страница 121: ...5 1 42 UNIT DESCRIPTIONS Diagram 8 Y functions ...
Страница 122: ... 12FNC12 I2R4C12 12FNC34 12FNC34 R1S13 1K47 FNC FI ...
Страница 123: ...5 1 42 UNIT DESCRIPTIONS 12FNC12 FM2MV 00003 7 12FNC12 H2FNC12 Diagram 8 Y functions ...
Страница 124: ...UNIT DESCRIPTIONS 10P 120LD REF VOLTAGE DG001 HEF40M I f 1 ...
Страница 126: ...UNIT DESCRIPTIONS 10PA AC 35mV DC 5V REF VOLTAGE CORR DLDDCLEVB 1 DLDDCLEVELO I R5050 51IK DS001 HEF40M D5001 HEF4066 ...
Страница 129: ... REF VOLTAGE j D5001 HEF4009 DS001 HEF40M If C0RHECT10N VOLT N5001 366 f ...
Страница 133: ...5 1 45 D5501 HEF4053 CNT STB251 970428 Diagram 10 Display and trigger control ...
Страница 138: ...5 1 47 Diagram 12 MTB trigger ...
Страница 140: ...5 1 48 UNIT DESCRIPTIONS TV SYNC SEPARATOR l TV UNE FRAME SELECTION Diagram 13 TV line trigger ...
Страница 142: ...5 1 48 UNIT DESCRIPTIONS TV SYNC SEPABATOtT TV UNE FRAME SEUECTKDN Diagram 13 TV line trigger ...
Страница 143: ...UNIT DESCRIPTIONS 5 1 49 160TR Diagram 14 DTB trigger ...
Страница 146: ...5 1 50 UNIT DESCRIPTIONS Diagram 15 Time base logic ...
Страница 148: ...5 1 50 UNIT DESCRIPTIONS V 6 0 0 4 Diagram 15 Time base logic ...
Страница 149: ...UNIT DESCRIPTIONS 5 1 51 Diagram 16 Main time base ...
Страница 150: ...UNIT DESCRIPTIONS R6001 ...
Страница 151: ...5 1 51 ...
Страница 153: ......
Страница 154: ...5 1 52 UNIT DESCRIPTIONS R716Y C7181 ONLY IN PM30Q2 PM3004 Diagram 17 Delayed time base ...
Страница 155: ...UNIT DESCRIPTIONS 5 1 53 X9001 I 1 D 0 O O 8 1 Diagram 18 Connectors ...
Страница 207: ...5 2 8 UNIT DESCRIPTIONS BFT92 W1p Lay out 2 Small component side of XYZ amplifier unit A2 200 MHz ...
Страница 208: ...n r i r 1 1 1 C33 d iM d id d iN dQN o e j d M l d A l d m 26id eSttfG Orfidfi 28d 128JS 0S848 sesifl 09S60S o w r a I ...
Страница 214: ...UNIT DESCRIPTIONS 5 2 13 5 2 5 Circuit diagrams A2 200 MHz version ...
Страница 215: ...UNIT DESCRIPTIONS 5 2 5 Circuit diagrams A2 200 MHz version 0501 22 ...
Страница 216: ...5 2 13 ...
Страница 217: ...5 2 14 UNIT DESCRIPTIONS A2 200 MHz Diagram 2 Final Y output stage ...
Страница 218: ......
Страница 219: ...5 2 14 UNIT DESCRIPTIONS STB263 970428 A2 200 MHz Diagram 2 Final Y output stage ...
Страница 223: ...5 2 16 UNIT DESCRIPTIONS AC20mV DC 10V AC 80mV OCMOV A2 200 MHz Diagram 4 Final Z amplifier ...
Страница 224: ...AC 60mV DC 1CV R3311 511E M20Q2 11 AST03 R3313 1 2KB7 V3311 ...
Страница 226: ...UNIT DESCRIPTIONS 5 2 17 A2 200 MHz Diagram 5 Modulator demodulator and focus control ...
Страница 227: ...UNIT DESCRIPTIONS FOCUS L i X2401 ...
Страница 228: ...5 2 17 A2 200 MHz Diagram 5 Modulator demodulator and focus control ...
Страница 231: ...8 5 ii 8 HI I Hl H s HI I i HI I ...
Страница 232: ...g I S 5 S I 1 H H r lr H J g if j r r 8 3 8 8 S 3 5 5 H H 5 3 r l r l H H n ft 3 S 5 8 a s 5 ...
Страница 268: ...UNIT DESCRIPTIONS 5 2 11 Circuit diagrams A2 100 MHz version ...
Страница 269: ...5 2 47 ...
Страница 270: ...5 2 48 UNIT DESCRIPTIONS TO CflT ...
Страница 271: ......
Страница 272: ...5 2 48 UNIT DESCRIPTIONS TO CRT D14 364GH 123 YFSHF R4191 VFSHF1 YFSHF2 A2 100 MHz Diagram 2a Final Y output stage ...
Страница 274: ...UNIT DESCRIPTIONS 12XNO DC LEVEL SHIFT XTEXT XZ CONTROL N2002 TOA 8444 LOCAL SUPPLY FILTERING 58XN0 5 a saxR ...
Страница 277: ... 12ZNO DC LEVEL SHIFT Z TRACS Z RIPPLE SUPPRESS LOCAL SUPPLY FILTERING 58ZN0 SfiZF saa R3411 N20 ...
Страница 279: ...UNIT DESCRIPTIONS 5 2 51 FOCUS LEVELSHIFTER A2 100 MHz Diagram 5a Modulator demodulator and focus control ...
Страница 280: ...UNIT DESCRIPTIONS X2411 ...
Страница 281: ...5 2 51 FOCUS LEVELSHIFTER A2 100 MHz Diagram 5a Modulator demodulator and focus control ...
Страница 284: ... ...
Страница 285: ...a 5 a I H rI 3 H H H 8 K fc 5 3 3 I I ...
Страница 308: ...t 0 0 0 0 0 0 0 0 0 3 sS cn 03 03 UNIT DESCRIPTIONS ...
Страница 310: ...R1102 R1101 R1679 R1672 R1071 R1104 B1674 u HI 406 H i402 D1402 O N j oo O O ai 5 3 ...
Страница 311: ...bc646c Up BC866C 3Lp ...
Страница 313: ......
Страница 317: ...UNIT DESCRIPTIONS 5 3 9 5 3 5 Circuit diagrams Diagram 1 Central processor unit ...
Страница 318: ...UNIT DESCRIPTIONS 5 3 5 Circuit diagrams ...
Страница 319: ...5 3 9 r i Diagram 1 Central processor unit ...
Страница 324: ...UNIT DESCRIPTIONS ...
Страница 325: ...5 3 11 Cl 968 T 1 0 0 n C1963 I80u Diagram 3 Potentiometer DAC and lEEE option h i m ...
Страница 326: ...5 3 12 UNIT DESCRIPTIONS G4 oi TEXT CURSOR CONTBOL 12MG Diagram 4 Text and cursor circuit i ...
Страница 328: ...5 3 12 UNIT DESCRIPTIONS G4401 12MG TEXT CURSOR CONTROL Diagram 4 Text and cursor circuit ...
Страница 342: ...UNIT DESCRIPTIONS 5 4 4 Unit lay outs TO X5201 ON CRT CONTROL A5 I O C O I D C G C I ...
Страница 344: ...UNIT DESCRIPTIONS 5 4 4 Unit lay outs TO X5201 ON CRT CONTROL A5 H cc c c IH ...
Страница 349: ...UNIT DESCRIPTIONS 5 4 7 5 4 5 Circuit diagrams CS801 10On cs 02 C5603 cseo J 10n ion ion 1 A4 Diagram 1 Front processor ...
Страница 352: ...5 4 8 UNIT DESCRIPTIONS REF NR TYPE 5VD L C 74HC5A1 20 10 CS0Q2 STB286 970428 A4 Diagram 2 Key matrix ...
Страница 354: ...5 4 8 UNIT DESCRIPTIONS REF NR TYPE 5VO C 05002 74HC841 20 10 csace STB2M 070428 A4 Diagram 2 Key matrix ...
Страница 360: ...sna iu o UNIT DESCRIPTIONS 5 5 3 5 5 3 Circiuit diagram X5201 A5 Diagraml CRT controls unit ...
Страница 367: ...UNIT DESCRIPTIONS 5 6 3 Unit lay outs TO X2401 ON ...
Страница 369: ......
Страница 371: ......
Страница 372: ... 00 o o O o ...
Страница 377: ...UNIT DESCRIPTIONS 5 6 5 Circuit diagrams G LI 001 fKfcjH ...
Страница 379: ...5 6 10 t ...
Страница 381: ... EHT CONVERT ...
Страница 383: ...UNIT DESCRIPTIONS OUTPUTCIRCUIT V1271 BYV29 T1001 T1001 T1001 now T1001 T1001 now now ...
Страница 385: ...UNIT DESCRIPTIONS OUTPUTCIRCUIT V1271 BYV20 T1001 T1001 T1001 T1001 T1001 T1001 TI001 T1001 REF ...
Страница 394: ...UNIT DESCRIPTIONS 5 7 1 5 7 RESERVED FOR FUTURE EXTENSIONS ...
Страница 395: ...UNIT DESCRIPTIONS 5 8 1 5 8 RESERVED FOR FUTURE EXTENSIONS ...
Страница 396: ...UNIT DESCRIPTIONS 5 9 1 5 9 RESERVED FOR FUTURE EXTENSIONS ...
Страница 397: ...UNIT DESCRIPTIONS 5 10 CONNECTOR BOARD A10 5 10 1 Unit lay out ...
Страница 399: ...UNIT DESCRIPTIONS 5 10 CONNECTOR BOARD A10 5 10 1 Unit lay out 28 27 O O X IAJ 2 1 ...
Страница 412: ...UNIT DESCRIPTIONS 5 11 3 Fig 1 Location of options Y out and external trigger ...
Страница 413: ...UNIT DESCRIPTIONS ...
Страница 414: ...5 11 3 Fig 1 Location of options Y out and external trigger ...
Страница 415: ...5 11 4 UNIT DESCRIPTIONS Fig 2 Printed circuit board lay out of Y out unit ...
Страница 417: ...UNIT DESCRIPTIONS 12V 12V 12V 12V X1003 YOP HX R1001 I 1 2 K 1 X1009 X1010 SCL ...
Страница 422: ...5 11 10 UNIT DESCRIPTIONS 01002 MTREXTSW HD CNT4MT HT Fig 4 Printed circuit board lay out of external trigger unit ...
Страница 425: ...UNIT DESCRIPTIONS C1002 33p DC LIMITER SUPPLY VOLTAGES X2011 T 12V X2012 R2061 f 4 E 7 C2061 S 47 Z 25V m C2062 0 0n 12 ...