HP-150A_Manual_Serial_Above1190 电路图.pdf

HP Archive This vintage Hewlett Packard document was preserved and distributed by vvwvv. h parc Please visit us on the web ! Scanned by on-line curator: Tony Gerbic * For FREE Distribution Only * RadioFans.CN 收音机爱 好者资料库 OSClllOSCOPE O P E R A T I N G AND S E R V I C I N G M A N U A L RadioFans.CN 收音机爱 好者资料库 O P E R A T I N G AND S E R V I C I N G M A N U A L F O R MODEL 150A HIGH FREQUENCY OSCILLOSCOPE Serial 1190 and Above And MODEL 152A DUAL TRACE AMPLIFIER Serial 1086 and Above , Copyright 1956 by Hewlett-Packard Company The information contained in this booklet i3 intended for the operation and main- tenance of Hewlett-Packard equipment and is not to be used otherwise o r reproduced without the writtenconsent of the Hewlett- Packard Company. HE WLET T-PACKARD COMPANY 275 PAGE MILL ROAD, PAL0 ALTO, CALIFORNIA, U.S.A. 15OAOO1-1 RadioFans.CN 收音机爱 好者资料库 150A SPECIFICATIONS SWEEP GENERATOR INTERNAL SWEEP: MAGNIFICAT ION: SYNCHRONIZATION: SYNC CONTROL: SINGLE SWEEP: SAWTOOTH OUTPUT: GATE OUTPUT: BAND WIDTH: . SENSITIVITY: INPUT IMPEDANCE: OUTPUT: 24 calibrated ranges provide sweep speeds from 0.1 psec/cm to 5 sec/cm; accurate to within 39%. A vernier control provides continuous adjustment of sweep speed between calibrated ranges and extends slowest sweep to 15 sec/cm. 5 calibrated ranges, X1, X5, X10, X50 and XlOO magni- fies center portion of unmagnified trace; increases fastest sweep speed to .02 psec/cm except l p X50 magnification and 2 p XlOO magnification. X1 and X5 ranges retain accuracy of original sweep. Internal, from line power or vertical input signal which causes 1/2 cm or more vertical deflection. External, either capacitive or direct coupled with 1/2V p-p or more. Sweep can be triggered from either a positive- or a negative going voltage; the triggering voltage level of external sync signals is continuously adjustable from -30 to +30 volts. Switch position automatically provides optimum sync stability for majority of uses. Switch in top access provides single-sweep operation. +20 to -20 volt sawtooth output available from connec- tor in top access. 20-volt positive pulse for duration of sweep available from connector in top access. HORIZONTAL AMPLIFIER Direct current to 500 kilocycles. 5 calibrated ranges provide sensitivities from 0.2 volt/cm to 5 volts/cm. A vernier control provides continuous adjustment between calibrated ranges and extends the minimum sensitivity to 15 volts/cm. 1 megohm shunted by 40 pfl. CALIBRATOR 1000-cycle square wave having 1-psec rise and decay time available at front-panel connector . 18 calibrated ranges provide from 0.2 millivolt to 100 volts peak-to-peak, accurate to within 370. I I , I I , ! t I ! I i I 1 I I I , 1 I I I i 1 i i i I ! I I i i I TYPE: DEFLECTION PLATE CONNECTIONS: INTENSITY MODULATION: REPLACEABILITY: POWER REQUIREMENTS: SIZE: WEIGHT: BANDWIDTH: SENSITIVITY: INPUT IMPEDANCE: DUAL TRACE PRESENTATIONS CATHODE RAY TUBE 5 AMP- rr-cno-accelerator, flat face, available with P1, P2, P 7 or P11 screen. 5000-volt accelerating potential . Both screw and pin-type terminals in top access re- ceive wires or special connector assembly for connec- tion to plates. Terminals inside top access to receive +20 pulse for blanking CRT trace of normal intensity. CRT bezel removes with 150 twist for replacement of graticule or CRT from the front panel. CRT bezel provides firm mounting for standard oscil- loscope cameras . 115/230 VAC +lo%, 50/60 cycles, approximately500 watts. 13-1/2 wide x 17-1/411 high x 25 deep. Net weight 80 pounds; shipping weight 104 pounds. l52 DUAL TRACE AMPLIFIER Direct Current to 10 megacycles; rise time 0.035 microsecond. 9 calibrated ranges provide sensitivities from 0.05 to 20 volt/cm, 570. Vernier control provides continuous adjustment between calibrated ranges and extends the minimum sensitivity to 50 volts /cm. 1 megohm shunted by 40 ppf each channel. Simultaneous traces obtained either by alternate sweep ing or by 100-kilocycle chopping, as selected. Chop- ping lines between traces are blanked. Channels are completely independent and have identi- cal operating controls . Pos-Up-Pos Down switch provided. TABLE OF CONTENTS FOR MODEL 150A AND MODEL 152A HIGH FREQUENCY OSCILLOSCOPES Par a . SECTION I GENERAL DESCRIPTION 1-1 1-2 1-3 1 -4 1-5 1-6 2-1 2 -2 2-2A 2-2B 2-2c 2-2D 2-2E 2-3 2 -4 2-5 3-1 3-2 3 -3 3 -4 3-5 3-6 3-7 3-8 3 -9 3-10 3-1 1 3-12 3-13 4-1 General Information. . . . Damage in Transit . . . . Power Line Voltages . . . Power Cord . . . . . . . Cooling . . . . . . . . . Overload Relay . . . . . . SECTION I1 OPERATING INSTRUCTIONS High Voltage Time Delay . . Controls and Terminals . Internal Sweep Controls . Horizontal Input Controls. . Dual Channel Amplifier Controls . . . . . . . . . CRT Panel Controls . . . . Top Access Controls . . . Operating Procedures . . . Vertical AC or DC Coupling . Use of Chopped or Alternate Sweep . . . . . SECTION 1 1 1 THEORY OF OPERATION General Content . . . . Overall Operation . . . . . Synchronizing Circuit . . . Sweep Generator . . . . Feedback Integrator and Diode Switch . . . . . . . Schmitt Trigger Circuit . Horizontal Amplifier. . . . Main Vertical Amplifier . . Model 152 Dual Trace Amplifier Plug-In Unit . . . Calibrator . . . . . . . . Regulated Low-Voltage Power Supply . . . . . . Re gulate d High-Volt age Power Supply . . . . . . . Single Sweep and Delayed Sweep Operation . . . . . SECTION IV MAINTENANCE Introductory . . . . . . . Page 1-1 1-1 1-1 1-1 1-1 1-1 2-1 2-1 2-1 2 -2 2-2 2-3 2-3 2-3 2-3 2 -4 3-1 3-1 3-3 3-5 3-6 3-7 3-7 3-8 3 -9 3-1 1 3-1 1 3-13 3-13 4-1 Para. 4-2 4-3 4 -4 4-5 4-6 4-7 4-8 4-9 4-10 4-11 4-12 4-12A Replacing the Air Filter . . Removing the Cabinet . . . Connecting for 230-Volt Power Lines . . . . . . . Servicing Etched Circuits . Tube Replacement Chart . . Isolating Troubles to Major Sections . . . . . . Adjusting the Low-Voltage Power Supplies . . . . . . Adjusting the High-Voltage Power Supply . . . . . . Replacing and Adjusting theCRT . . . . . . . Adjusting the Calibrator . Adjusting the Main Horizontal Amplifier. . . Main Horizontal Gain Adjustment . . . . . . . . Calibration . . . . . . Centering and X1 Centering. Frequency Response Adjustment . . . . . . . . 4-13 Adjusting the Ext. Horiz. Input Preamplifier. . . . . 4- 13A Horiz . Balance Adjustment. . . . . . . . 4-13B Ext. Horiz. Input Volts/CM Calibration . . . 4-13C Ext. Horiz. Input . . . . 4-14 Adjusting the Sync Circuit . 4-15 Adjusting the Preset Sensi- 4-12B XlOO Magnification 4-12C X5 to XlOO Magnification 4- 12D Main Horizontal Amplifier tivity of the Sweep Generator . . . . . . . Generator . . . . . Adjustment . . . . . quency Response of Main Vertical Amplifier . . . . 4-18 Adjusting Model 152A Dual Trace Amplifier. . . . . . 4-18A Vertical Centering Adjustments . . . . . . 4- 18B Neutralizing Adjustments . 4-18C Output Frequency Response Adjustment . . 4-16 Calibrating the Sweep 4- 16A Sweep Amplitude 4-17 Adjusting Gain and Fre- Page 4- 1 4-1 4-1 4- 1 4-3 4-3 4-3 4-9 4-9 4-11 4-11 4-11 4-13 4-13 4-14 4-15 4-15 4- 15 4-17 4-17 4-18 4- 18 4-18 4-21 4-2 1 4-21 4-21 4-23 SECTION I GENERAL DESCRIPTION 1-1 GENERAL INFORMATION 1-4 POWER CORD The Model 150A dc to 10 MC oscilloscope is a general purpose oscilloscope employing a 5-AMP mono-accelerator type cathode ray tube, with unitized, plug-in construction for maximum accessibility and flexibility. It can be used with either internal or external sweeps which can be either internally or ex- ternally synchronized. The horizontal ampli- fier incorporates magnification circuitry which is capable of expanding basic internal sweeps up to 100 times. Thus the internal sweep range extends from .02 bsec/cm to 15 sec/cm. The Model 150A has been designed for use with a variety of vertical amplifier plug-in units to perform many different functions , but for the purpose of explaining scope opera- tion in this manual, it will be assumed that the Model 152A Dual Channel Amplifier is employed, Since the control layout on the front panel has been carefully organized and labeled for convenient operation, most con- trols will be self-explanatory. However , major controls will be discussed completely in the operating section of the manual. A large fold outview of the panel is included in Section I1 with all operating controls de- s cr ibed . The three conductor power cable supplied withthe instrument is terminated in a polar- ized three prong male connector recommend- ed by the National Electrical Manufacturers Association. The third contact is an offset, round pin added to a standard two-blade ac plug which grounds the instrument chassis when used with the appropriate receptacle. To use this plug in a standard two contact outlet an adapter should be used to connect the NEMA plug to the two contact system. When the adapter is used the ground connec- tion becomes a short lead from the adapter which can be connected to the outlet mounting box for the protection of operating personnel. 1-5 COOLING The Modell5OA employs a forced draft cool- ing system to maintain satisfactory operating temperatures within the case. The air intake and air filter is located under the instrument case, and adequate cooling will take place as long as the case is on the instrument and noth- ing obstructs the filter. Generally, the height of the cabinet feet provide such clearance. Thus the Model150A can be used in a con- fined bench set-up as long as the underside of the cabinet is clear, and ambient tempera- tures are not extreme. 1-2 DAMAGE IN TRANSIT 1-6 OVERLOAD RELAY After unpacking this instrument should any The Model 150A has an overload-relay which shipping damage become evident, refer to the reduces the output voltages of the power SUP- 1lClaim for Damage in Shipment paragraph ply when: on the warranty sheet in this manual. 1-3 POWER LINE VOLTAGES The Oscilloscope, like other instruments, is shippedfrom thefactory wiredfor 115 volt ac line operation unless otherwise specified in the order. However, the instrument may also be operated from a 230 volt ac line source if the proper conversion is made to the power transformer. This conversion is simple, and is described in the Maintenance section. 1. ) Any series tube on the d-c heater string is removed while the in- strument is on. 2.) A plug-in vertical amplifier is removed while the instrument is on. 3.) A short circuit or excessive loading of any positive-voltage supply occurs. 1-1 i SECTION II OPERATING INSTRUCTIONS 2-1 HIGH VOLTAGE TIME DELAY The Model 150A applies voltage only to its tube filaments for about 30 seconds after you turn it on. This delay provides an adequate warm up before tube plate voltages and CRT high voltages are applied. If the instrument is turned off for any reason this delay will recycle before the instrument returns to op- eration. 2-2 CONTROLS AND TERMINALS The front panel arrangement and operating controls are shown in the fold out illustra- tion, Figure 2-1. The description of the op- erating controls should enable you to operate the instrument if you have a basic knowledge of oscilloscope technique. However, a com- plete description of control function follows: 2-ZA INTERNAL SWEEP CONTROLS SWEEP TIME/CM Amulti-position switchwhich selects any one of twenty four calibrated sweep speeds from 0.1 p e c / c m to5 sec/cm. This switchis as- sociated with a concentric VERNIER which provides continuous adjustment of sweep speed between steps, and in the full counter- clockwise position extends the sweep time to 15 sec/cm. When the VERNIER is in the full clockwise position (GAL), it is out of the cir- cuit and the sweep time is calibrated within k370 as read on the SWEEP TIME/CM dial. INT. SWEEP MAGNIFICATION Afive position magnification control, X1, X5, X10, X50, and X100. The Xlposition provides calibrated sweep speeds as read onthe SWEEP TIME /CM switch. Other positions indicate degree of expansion taking place about the vertical centerline on the scope graticule. Whenever the sweep is magnified beyond X1 the SWEEP MAGNIFIED lamp will light. The fastest calibrated sweep time of 0.02 p e c / c m is obtained by setting the SWEEP TIME/CM switch to .1 or .2 psec/cm and setting the magnifier on X5 or X1O respectively. If you exceed the fastest calibrated sweep time, the MAGNIFIER UNCALIBRATED reminder lamp will light. It will also light with 1 psec/cm X50 and 2 psec/cm X100. SYNC Afour position switch which enables the sweep to be triggered either internally or external- ly. Internal triggering can be accomplished from a line voltage signal or (INT) from an applied vertical input signal of sufficient am- plitude to produce a 5mm deflection. Exter- nal triggering can be effected by signals hav- ing amplitudes greater than 0. 5 volt. Since the low frequency cut off of the ac coupled sync input circuit is approximately 200 cps, it is advisable to use EXT DC for external low frequency sync signals. Concentric with the SYNC switch is the SWEEP MODE control. SWEEP MCDE A continuous control which adjusts the input bias of the sweep generator. As the control is rotated from the extreme clockwise posi- tion, the sweep generator will pass from a free running (FREE) condition to a condition where triggering is required (TRIGGER). At the extreme counterclockwise position the control switches into a PRESET position. PRESET provides optimum triggering bias for nearly all sync applications. TRIGGER LEVEL A continuous control which selects the ampli- tude level of the sync signal where trigger- ing occurs. For external synchronizing sig- nals therange of this controlis from +30 to -30 volts, allowing the sweep to be triggered at any point within this range on simple or complex waveforms. See Figure 2-2. TRIGGER SLOPE A two position switch concentric with TRIG- GER LEVELwhich permits triggering to oc- cur on either the positive or negative slope of internal, external or line voltage sync sig- nals. See Figure 2-2. EXT SYNC INPUT A pair of binding posts and a BNC connector which are connected in parallel and receive external synchronizing signals. 2-1 FIGURE 2-2 2-2B HORIZONTAL INPUT CONTROLS EXT HORIZONTAL INPUT A pair of binding posts and a BNC connector which are connected in parallel and receive externally applied sweeping signals to drive the horizontal amplifier. The amplifier pass band is from dc to 500 KC. EXT INPUT VOLTS/CM A five position attenuator calibrated from .2 volts/cm to 5 volts/cm which establishes the input sensitivity of the horizontal amplifier. This switch is associated with a concentric VERNIER which provides continuous ad just - ment between steps and reduces the input sensitivity to 15 volts /cm in the full counter- clockwise position. When the VERNIER is in the full clockwise (CAL) p