Gould OS300 Operating And Service Manual Download Page 27 | Manualshive

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Summary of Contents for OS300

Page 1: ...www SteamPoweredRadio Com OS300 20MHz DUAL TRACE OSCILLOSCOPE INSTRUCTION MANUAL Operating a dService Manual GOULD ...

Page 2: ...RACE OSCILLOSCOPE INSTRUCTION MANUAL The information contained herein is the exclusive property of Gould Inc except as otherwise indicated and shall not be reproduced in whole or in part without explicit written authorization from the company The distribution of this material outside the company may occur only as authorized by t e company in writing All information contained in this manual is the ...

Page 3: ... instruction manuals must be sealed into a separate plastic bag and packed with a minimum of 2 inches of cushioning between the instrument and the accessories TENANCE AS OUTLINED IN OPERATING MANUALS IN NO EVENT SHALL THE GOULD INST RUMENTS DIVISION BE LIABLE FOR CO LLATERAL OR CON SEQUENTIAL DAMAGES Units are to be returned transportation prepaid by the buyer The Gould Instruments Division will h...

Page 4: ...TRUMENTS DIVISION 5900 Princess Garden Parkway Lanham Seabrook Maryland 20706 Phone 301 459 7350 SERVICE CENTERS LOS ANGELES INSTRUMENTS DIVISION 2525 Campus Drive Irvine California 9271 S Phone 213 639 7301 ORLANDO INSTRUMENTS DIVISION 772 Northlake Avenue Altamonte Springs Florida 32701 Phone 305 830 0695 PHILADELPHIA INSTRUMENTS DIVISION GSB Building Belmont City Line Avenue Bala Cynwyd Pennsyl...

Page 5: ...fier 4 5 The Mode Control Circuits and Calibrator 4 6 The Power Supplies and C R T Circuits 1 1 2 1 3 1 3 1 3 1 3 1 3 2 3 2 3 2 3 3 4 2 4 2 4 2 4 3 4 3 4 4 4 5 SECTION 5 Maintenance 5 2 5 1 General 5 2 5 2 Access 5 2 5 3 Fault Finding 5 3 5 4 Setting up Procedure 5 5 SECTION 6 Component Lists and Circuit Diagrams 6 1 SECTION 7 Guarantee and Service Facilities 7 1 ILLUSTRATIONS Fig 1 Block Diagram ...

Page 6: ... from 0 2s cm to O Sµs cm and ax 10 expansion facility extends this to S0ns cm Independent variable sensitivity and sweep rate controls are provided I I Section 1 Particular attention has been paid to trigger performance with D C and A C coupling available and a bright line free run facility to enable trace location in the absence of trigger An active T V synch separator is provided for those work...

Page 7: ...lity With Bright Line on the timebase free runs when insufficient signal 20Hz 20MHz is present or when the selected level is outside the range of the input signal Source Internal CHI or CH2 or External Slope or Coupling DC AC or TV active sync separator with line frame selected by T B switch between 50 and I0Oµs cm Sensitivity Internal DC coupled 2mm to 2MHz 5mm to 20MHz AC coupled 2mm IOHz 2MHz 5...

Page 8: ... that the fuse has to be changed when switching between the I00V and 220V ranges The switches and fuse holder are mounted on the ba k panel of the instrument Do not operate the range selection switches while the OS300 is switched on 3 1 Section 3 3 2 OBTAINING A TRACE I After connection to the supply switch on by turning the INTENSITY control clockwise away from the OFF position Check that the POW...

Page 9: ...vercome by first connecting one input to both channels simultaneously 3 2 Section 3 and adjusting one or other of the VARiable SENSitivity controls to obtain a straight line 4 In the X Y mode the timebase is disabled and the CH2 input is displayed as the vertical Y deflection against the CHI input displayed as horizontal X deflection The CHI shift control is inoperative and X position is determine...

Page 10: ... be used also to set up passive probes see section 3 7 4 2 Ramp Output This 4mm socket on the rear panel provides a d c coupled positive going ramp generated by the J J Section 3 timebase of approx 3 SV pk from an impedance of approx Sk ohms If a lower output level can be tolerated distortion of fast ramp output signals due to capacitive loading can be avoided by adding resis tive loading to atten...

Page 11: ...R PRE AMPLIFIER PRE AMPLIFIER TRIGGER AWLIFIER BEAM Y OUTPUT SWITCH AMPLIF IER BEAM CHOP SWITCH MULTIVIBRATOR BISTABLE MONOSTABLE TV SYNC HOLD OFF SEPARATOR 1 SCHMITT TRIGGER CRT I 0 7 IX J BLANKING AMP RAMP TB_ C XY GENERATOR TIMEBASE X SET BISTABLE RESET AMPLIFIER n C C ff CA n C r 0 ff n r 0 ...

Page 12: ... sweeps the beam across the 4 2 Section 4 c r t face returns and waits for the next input cycle to reach the set trigger point so producing subsequent ramps The timebase bistable is connected to a blanking amplifier whose function is to turn on the electron beam during the sweep and blank it off during the fly back and subsequent waiting period At fast sweep rates for a dual trace display the TIME...

Page 13: ...ove signals are disconnected and the single sided input from the EXT TRIG input socket SKC is selected 4 3 Section 4 When the AC coupling switch S504 is out the trigger signals are directly coupled through but when this switch is in AC coupling is introduced via C603 and C604 C60I on External TR601 and TR602 form a differential buffer amplifier with the DC balance controlled by the TRIGGER LEVEL c...

Page 14: ... resistance R552 with the preset R553 In this mode the transistor switch TRS 12 is biased off However in the normal x I magnification mode S507 is open and the current in R548 turns on TRS 12 introducing R544 with preset RS I J as additional feedback to reduce the gain of the amplif1er accordingly The X shift control R271 introduces an additional bias input via R54 I and emitter follower TR506 thr...

Page 15: ...he zener diode 0711 with temperature compensation diodes 07 I3 and D7 I4 and 4 5 Section 4 the shunt transistor TR7 12 conducts to maintain the I IV line at the correct potential The 5V line is derived from this 11 V line by the zener diode D7 l 2 with the compensation diode D720 followed by the emitter follower TR709 With the negative side of the unstabilized supply across C704 defined at 11 V by...

Page 16: ...s the composite signal from the collector of TRS07 Fig S see section 4 S which provides bright up during each timebase sweep with blanking of each chop transistion if approp 4 6 Section 4 riate Diodes D701 and D702 provide protection against excessive external inputs and with R702 prevent saturation of TR702 The focus electrode of the c r t is supplied from the focus control potentiometer R744 wit...

Page 17: ...ECTIONS TRACE COIL L1 Fig 2 Internal Assembly top view CRT CLAMP RETAINING SCREW R307 CH1 BAL 5 1 R302 CH1 GAIN R35 CH 2 BAL Section 5 R 725 SET EHT F 701 HT FUSE R 713 SET INTENSITY C405 Y AMP COMPENSATION R553 X AMP x 10 GAIN R551 X AMP x 1 GAIN C402 Y AMP COMPENSATION R415 Y GAIN R506 SET mS TIMEBASE RANGES R352 CH2 GAIN ...

Page 18: ...e c r t pins Remove the single clamp fixing screw see Fig 2 and rotate the two clamp sections approx 30 to free the clip from the centre panel Once the tube and clamp assembly are free the clamp itself can be slackened on the tube Slide the tube backward through the center panel until the c r t face plate is clear of the front mounting clip The tube can then be lifted up and drawn forward to clear...

Page 19: ...744 CONTROL POTS PC ASSY R745 S1 INTENSITY CONTROL SUPPLY SWITCH CAPACITY CRT BASE __ PC ASSY SJ S I SUPPLY RANGE SELECTOR SWITCHES Fig 3 Internal Assembly bottom view SKG Z MOD 1 P SKH GND 5 3 SKD RAMP 0 P Section 5 C101 CH2 ATTEN COMP TRIMMER ADJ HOLES ATTEN SCREEN RETAINING JOINTS Tl POWER TRANSFORMER F1 SUPPLY FUSE PLM SUPPLY INPUT ...

Page 20: ...leared it is recommended that the setting up procedure of section 5 4 is followed For checking the supply lines there is a double row of test pins separated by bridged split pads These pins will give outputs of IV I IV 2 10V 7Vand SY and if required the currents drawn by each line can quickly be measured simply by breaking the solder shorting the split pad for normal working operation and insertin...

Page 21: ...tments have been made should be considered as a fault and the operating conditions should be checked according to section 5 3 The procedure should be followed in the specified order a Test Equipment l Multirange Test Meter including 2 SkVcapability at 20kf2 V 2 Variable Autotransformer output voltage 100 270V at SA 3 Sine square wave signal generator I0Hz to I00kHz 20mV SY 4 Source of voltage and ...

Page 22: ...e signal All other sensitivity ranges can be checked for accuracy 5 6 Section 5 k Ensure that the CH2 Variable Sensitivity control is set fully clockwise to Cal Transfer the l00mV calibration signal to channel 2 and set to display that channel at 20mV cm Set R352 for a 5cm vertical ampli tude signal All other sensitivity ranges can be checked for accuracy I Attenuator Compensation Apply a square w...

Page 23: ...have internationally available equiva lents NOTE All part numbers shown in this manual shall be prefixed with AD2 i e 37898 should be AD237898 ABBREVIATIONS USED FOR COMPONENT DESCRIPTIONS RESISTORS cc Carbon Composition W 10 unless otherwise stated CF Carbon Film W 5 unless otherwise stated MO Metal Oxide W 2 unless otherwise stated MF Metal Film W 1 unless otherwise stated WW Wire Wound 6W 5 unl...

Page 24: ...598 R356 lk CF 21799 I R215 Ik5 MF 2 38598 R357 10k PCP 36267 R216 180 CF 21795 R358 33k CF 21812 R217 4k7 CP 44980 R359 120 MF 2 38572 I R231 lk8 CF 28725 R361 10 CF 21793 R232 10 CF 21793 R362 10 CF 21793 R363 100 CF 21794 I R234 lk5 CF 21801 R364 100 CF 21794 R235 4k7 CF 21805 R365 4k7 CP A4 450060 R236 4k7 CF 28714 R366 3k3 MF 2 38606 R237 470k cc 4906 R367 3k3 MF 2 38606 I R238 150 CF 28719 R...

Page 25: ... 28714 R555 47 CF 28714 I R445 47 CF 28714 R556 2k7 CF 28726 R557 lk8 CF 28725 R503 470 CF 21797 R558 10 CF 21793 I R504 56k CF 28729 R559 100 CF 21794 R505 27k CF 21813 R560 68k CF 21816 R506 I0k PCP 36367 R561 100 CF 21794 R507 4k7 CF 21805 R562 Ok CF 21809 I R508 4k7 CF 21805 R563 390 CF W 18545 R509 33k CF 21814 R564 33k CF 21814 R510 IO CF 21793 R565 2k2 CF 21802 RSI I IOk CF 21809 R566 100k ...

Page 26: ...629 IM CF 31840 R630 100k CF 21819 R741 Sk6 cc 5 lW 2363 R631 33k CF 21814 R742 220k MF 2 38650 I R632 300k CF 2 38653 R743 33M MG 5 W 43008 R633 15k CF 28727 R744 IM CP A4 44460 R634 6k8 CF 21807 R745 Ok CP With Sl A4 44461 I R635 10 CF 21793 R746 82k CF 21818 R636 68k CF 21816 R747 120k CF 21820 R637 2k2 CF 21802 R748 100k CF 21819 R638 3k9 CF 21804 I R639 IOk CF 21809 RNlOl Resistor Network A3 ...

Page 27: ...2 2200pF PE 4kV A4 44990 I C703 2200pF PE 4kV A4 44990 C401 0 0lµF CE 3 42444 C704 I000µF E 40V 44992 C402 27pF Trimmer 32519 C705 33µF E 350VA3 44991 C403 47pF CE 3 42416 I C404 120pF CE 3 42421 C708 l0µF E 25V 32 180 C405 10 65pF Trimmer 30286 C709 2200pF PE 4kV A4 44990 C406 A 0 T C710 I0µF E 25 V 32180 C407 0 lµF CE 2 lOOV 37018 C711 0 lµF PE 1 5kV 40075 I C408 5600pF CE 3 42441 C712 0 lµF PE ...

Page 28: ...03 IN4148 23802 TR514 NSD459 40054 D504 IN4148 23802 I TR515 BF393 450226 D505 IN4148 23802 TR601 BC558C 44952 D507 IN4148 23802 TR602 BC558C 44952 D508 IN4148 23802 I TR603 BC547B 44951 D509 IN4148 23802 TR604 BC557B 44950 TR605 2N3904 24146 TR606 2N3904 24146 D511 IN4148 23802 I TR607 2N3906 21533 D51 2 IN4148 23802 D51 3 IN4148 23802 TR701 MPS2369 Selected 44953 D514 N4148 23802 TR702 BFR86B 44...

Page 29: ...48 23802 I D715 200V ZENER 40052 SI0l A4 44965 D716 200V ZENER 40052 SI02 44978 D717 200V ZENER 40052 D718 12kV 44550 131 A4 44965 I D719 12kV 44550 D720 IN4148 23802 S201 40048 D721 BAX17 402022 D722 1N4004 450266 S231 40048 I D723 IN4004 450266 D724 1N4004 450266 S261 A4 44476 D725 IN4004 450266 S262 A4 44979 D726 IN4004 450266 I D727 IN4004 450266 S301 A4 38729 D728 IN4004 450266 D729 IN4004 45...

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Page 32: ...i u i I I I I h I y f u J I I I 3 r t i l fi n __ 11 l t I 1 7 E I I I I I A J I 1 I 7 I I I iJ I I I _ _ ll I o I 4 I i I I I I _ j I i h I l f i I I m I µ r r i I f i z h r i e j i 1 ii Mr I rr E 7 E 1 f J t i _A _ 1 f ii _ I J_ ft il i g t f C r b f t t I 0 1 t T f ___ r 41 f E __ _________ _J l L _ _ ___ L LJ a ...

Page 33: ...Case Bottom I 24 A3 44472 Base Handle 2 s 25 Al 44469 Handle Assy I 26 A3 44471 Cover Handle 2 27 A4 36681 Button Handle 2 28 Al 44468 Case Top I 29 33016 M3 Plain Washer 3 30 33095 Screw M3 X 8 Pan Hd 3 31 29426 Pop Rivet 7 o 32 A3 450090 Clamp Heatsink I 33 33044 Screw M4 X 8 Pan Hd 4 34 33017 Washer M4 Wavey 6 35 33037 Screw M3 X 6 Pan Hd 2 36 33016 M3 Wavey Washer 2 37 33004 Washer M4 Plain to...

Page 34: ...www SteamPoweredRadio Com 3831 Perkinl Awnut Clewiland Ohio 44114 Telephone 218 381 3315 ...

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