Hitachi V-209 Operation Manual Download Page 30 | Manualshive

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26

Q)

Difference in the circuits

Exclusive circuit for conventional oscillograph

General circuit

Video �ignal

To trigger circuit

Hard t o synchronize, because

video signal is applied directly

as trigger signal.

Simple synchronizing

circuit

To trigger circuit

Synchronization  is  more  easily
effected  than  in  the  circuit
shown  at  left,  because  the
signal  is  integrated  to  remove
high  frequency components.

Exclusive circuit for this

instrument

(Principle drawing)

TV

exclusive synchronizing

separator circuit

To trigger

cucuit

After picking up the

SY

C

pulse,

the vertical synchronization

is

separated. Then, the stable syn
chronization is obtained.

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Summary of Contents for V-209

Page 1: ...MODEL V 209 OSCILLOSCOPE _ __ OPERATION MANUAL Hitachi Denshi Ltd ...

Page 2: ...rom the original date of pun has H11ach1 Dcnshi Ltd will e1ther repa1r 1 llr 11 1ts sole uptu1n rcpl lcr an part C cept for cathode ra tube fuses ll probes lamps batterio and otha optional materials which are defective in 1 euher worl mamhip or rnatenal under n mnal and proper use t Iter the expiration ut the one car free CI ii e period and during the addi ll 1 tiona penod overed by two year pans ...

Page 3: ...oduce the bright line 17 7 Method for connecting signal s 19 8 Measuring procedure I DC voltage measurement 1 2 AC voltage measurement 22 3 Measurement of frequency and penod 23 4 Measurement of time difference 23 5 Measurement of rise fall tll1le 24 6 Synchronization of compte ed waveform 25 7 How to use TV exclusJve synchronization 25 9 AdJUStments 27 10 Maintenance 2 II Specifications 2 12 Exte...

Page 4: ...film is damaged by scratches remove it To clean the enclosure or the front panel use neutral detergent Refrain from using thinner bent me alcohol or other chemicals For safety operation the instrument chassis and cabinet are sure to con nect the ground lead of the G D ground terminal to earth ground if a two wire AC power system is used Failure to complete the ground system may allow the chassis a...

Page 5: ... permits the waveform observation to be made without parallax error 4 3 way operation The instrument is operated with AC line external DC and Battery Pack AD 209 5 TV synchronization Employment of a new TV sync separator circuit allows the instrument to observe TV signals stably 6 Auto focusing Focusing shift is automatically corrected 2 ACCESSORIES This instrument is shipped with the following st...

Page 6: ...y from damp air water and dust L nexpected trouble may be caused when the instrument is placed an a damp or dusty place The operating ambient humidity is 35 85 Since an accidental antrusion of water may also cause troubles do not place a water filled containers such as a vase on the oscilloscope Do not place the instrument in a place where vibration is strong Avoid using the instrument at a place ...

Page 7: ...rument upside down Otherwise knobs may be broken b Do not use the instrument upright leaving BNC cable connected to EXT BLANKING terminal on the rear panel Otherwise the cable may be damaged Handle The handle of the V 209 can be positioned for carrying or as a tilt stand for the instrument To position the handle press in at both pivot points and tum the handle to the desired position 15 positions ...

Page 8: ...ns are present first remove the stains by w1pmg the surface lightly with a cloth moistened with diluted neutral wash ing agent or With alc ohol and then wipe thoroughly with a dry cloth When dust has accumulated on the inside remove it by using dry brush or by using the exhaust of a compressor or a vacuum cleaner NOTE When opening the case pull out the power suppl plug beforehand without fail When...

Page 9: ...es In order to protect the circuit against over current a 0 5A in primary side of power circuit and 2A in secondary side of power circuit are used When the fuses blow out check thoroughly the cause repair any faulty point present and then replace them with specified fuses Do not try to use the fuse other than the specified ones Otherwise fault may be caused or danger may be invited Particularly do...

Page 10: ...e select switch on the rear panel turn the instrument from one operating range to the other In addition this switch changes the primary connections of the transformer to allow selection of one of two regulating ranges Use the following procedure to convert this instrument between normal line voltage or regulating ranges a Disconnect the instrument from the power source b To convert from I 00 volts...

Page 11: ... Oitage 1s less than approx I0 5V it stops the operauon to prevent the battery ovenltscharge When mstrument is operated by u ing the AD 209 refer to chapter 5 Battery Operation n When the AD 209 IS not used it is possible that the CIIARGE lamp is illummated by setting the Charge mode Lxternal DC operation The V 209 can be operated by e temaliX l Ource II to 14 volts In tillS case DC source IS supp...

Page 12: ...Front View 8 ...

Page 13: ...8 rJ Rear View 9 ...

Page 14: ...ATION control Used to align the trace of CRT with the horizontal graticule INTENsity control JO Works as the brightness adjustment Brightness is increas ed by rotating INTENSsity clockwise j Power source select switch Used to select the power sources AC Operated with the AC power source DC Operated with the AD 209 or external DC power source Power mode select switch Used to select the power mode S...

Page 15: ... 0 when the I 0 I probe is used in combination with the instrument VARIABLE controls Fine tuning device is used to vary the vertical deflection sensitivity continuously Attenuation of less than 1 2 5 is obtained when this device is rotated in the reverse direction of the arrow to the full This control is used when comparing wavefom1s or when measuring the rise tinle of a square wave in 2 channel o...

Page 16: ...r in the observation of the waveform of the difference signal CHI l CH2 I between CHI and CH2 using ADD 3 Controls of horizontal deflection system TIME DIY lect switch Sweep time ranges are 18 steps from 0 5 psjdiv to 0 2s div X Y This position is used when using the instrument as an X Y oscillsocope In this position the X horizontal signal is con nected to the input of CH1 the Y vertical signal i...

Page 17: ...magnified for observation from the center of the scale by operating POSITION of the horizontal axis Next switchxiOMAG switch to PULL pulled out state Then the waveform placed at the center ts magnified in right and left directions The sweep time in this case is I 0 times of the sweep speed obtained by TIME DIV in other words the reading is I 10 of the sweep time indicated I I f y ft f 1 i Ii r 1 I...

Page 18: ... which the knob is protruding is for 8 SLOPE Explanation of synchronization polarity SLOPE Push at time of SLOPE Pull at time of 8 SLOPE Explanation of synchronization level LEVEL 0 f _ At the time _ of SLOPE At the time o ofG SLOPE TRIG MODE select switch AUTO Brought into automatically triggering sweep in which sweep is always conducted In the presence of triggered signal normal triggered sweep ...

Page 19: ...loscope 5 BATTERY OPERATION Operation of battery pack AD 209 I Set the Power source select switch j to DC and the Power mode select switch to DC OP 2 Tum on the POWER switch CD Then the V 09 starts to operate on the power from the AD 09 The continuous operation time is one hour and half If the battery is operated 1n excess of this period the ter minal voltage will decrease sharply and the battery ...

Page 20: ...of the battery b Store the battery pack in a cool and dark place and in the ambient temperature from IS to 35 C When a battery stored for an e tended period is used chargr it for IS hours 1 The hfe or the battery pack IS subject to the am bient temperature load cond1t1on and continuous operation Usually the number of the charge and discharge is over 300 If a charge and discharge is made once a day...

Page 21: ...0V for AC IOOV set 180 260V for AC 200V set Insert the plug of the power cord on the rear panel into the power supply wall socket and set the controls as follows POWER OFF INTEN Counterclockwise to the full FOCUS M1drange AC GND DC GND I POSITION Midrange the knob is left depressed V MODE Ill TRIG AUTO TRIG SOURCE CHI TIME DIY 0 5 ms div POSITION I Midrange Set all the levers of the switches to th...

Page 22: ...riable resistor TRACE ROTATION on the front panel 18 GENERAL MEASUREMENT I I n the case of observing a single waveform Use CHI or CH2 when not observing the phase difference between two waveforms or when engaging in a operation other than X Y operation Make the following settings when using CHI MODE Switch of Vertical defection system CHI MODE Switch of TRIG AUTO TRIG SOURCE CHI Under these settin...

Page 23: ... the horizontal axis magnification switch PULL MAG x 10 inner shaft knob at depressed position 7 METHOD FOR CONNECTING SIGNALS The first step of measurement is to introduce the signal desired to measure to the oscilloscope properly Do it with utmost care I When using a probe Use the attached probe AT I 0 AK I 5 when measuring a high frequency wave with high accuracy It should be noted however that...

Page 24: ... If the wavefonn is as shown in Fig b or Fig c rotate the semiftxed adjusting screw on the matching box of the probe by using a screwdriver until the opti mum state is obtained L Capacitance correction trimmer JliUlJ1 MJUl MM a Optimum b Capacity too small 2 At time ofdirect connection c Capacity too large When connecting a signal directly to the oscilloscope not usmg the attached probe AT 10 AK 1...

Page 25: ... In order to perform measurement with the measuring circuit put in proper operating state it is sometimes necessary to terminate the cable with an impedance which corresponds to the circuit to be measured o The stray capacity of the shield wire must be taken in10 account when performing measurement with a long shield wire Since the shield wire normally in use has a capacity of about I 00 pF per me...

Page 26: ... the shift width by the indicated value of VOLTS DIV When VOLTS DIY is 50 mV DIV then SO mV DIV x 4 2 210mV However if the probe AT 10 AK I S 10 1 is in use the true value of the signal be comes 10 times of the value or SO mV DIV x 4 2 x 10 2 1V DC voltage after shifting Zero level reference line 2 AC voltage measurement The same as paragraph 8 1 DC voltage measurement but here there is no need of...

Page 27: ... J0 3 500Hz However when the knob MAG x O is at pulled out posi tion TIME DIY must be converted to I 10 since the sweep is magnified I 1 I 71 f l I T II 71 1 I rr u Time A Time B II 1 lh__ v I 4 Measurement of time difference Triggering signal source SOURCE is selected as an offer ing reference signal when measuring the time difference be tween two signals Assume that pulse trains as shown in a Th...

Page 28: ...s depending on its width or period pay the same attention as given to high frequency signals when handling it Accordingly use a probe or coax ial cable and shorten the earth lead wire as much as possible 5 Measurement of rise fall time To measure the rise time pay attention not only to the abovementioned items but also to measurement error The following equation is provided for the relation among ...

Page 29: ...hich no synchro nization can be taken In such a case rotate LEVEL clockwise until the trigger level comes to Y line Then the waveform on the screen be comes the one shown in F1g c above wh1ch starts with B and advances to C E r and which allows synchro niLation TC 7 h 0 v J L p a Signal waveform Y Trigger level y Lting line b When the uiggcr c When the uigger ning level Y selling level i y Synchro...

Page 30: ...chronizing circuit To trigger circuit Synchronization is more easily effected than in the circuit shown at left because the signal is integrated to remove high frequency components Exclusive circuit for this instrument Principle drawing TV exclusive synchronizing separator circuit To trigger cucuit After picking up the SY C pulse the vertical synchronization is separated Then the stable syn chroni...

Page 31: ...ing signal b Example of synchronizing signal 9 ADJUSTMENTS The ATT balance of the Crtkal scan be made easily Qj ct the input couphng Htchc of CIll tiiJ CH to G D and set the TRIG MODI to Lro 1hen posn10n the bright line to the center Turn the VOLTS DIY switch to SmV IOmV and ad JUSt it so that the bnght line does not move Remove the cover CHI DC B L dJU tm nt o l l ...

Page 32: ...tery pack AD 209 11 SPECIFICATIONS CRT Type 3 5 inch rectangular CRT with internal graticule Phosphor P31 standard Graticule 8 x 10 div div 6 85 mm Internal graticule Focussing Possible with automatic focus correction circuit Trace rotation Brightness adjustment Present Possible IZ AXIS INPUT INTENSITY MODULATIO DC coupled positive going signal decreases intensity SVp p signal causes noticeable mo...

Page 33: ...f each deflection factor setting to I mV div Accuracy 3 10 to 35 C Additional error for magnifier 2 Display modes CHI CH2 normal or invert Alternate Chopped approximate 250kHz Added Input impedance 1 MS1 1 5c in parallel with 30 3pF Maximum input voltage 250V DC peak AC or SOOVp p A at IkHz or less Input coupling AC GND DC LHORIZONTAL DEFLECTION SYSTEM Time base O Sps div to 0 2s div in 18 calibra...

Page 34: ...ppro tm uely JOH1 A trigger coupling Af 20 II to full bandwidth External trigger input impedance I H 2 20 m parallel with 30 6pF Maximum input voltage 250V DC 1 C peali fX Y OPERATION CHI Horiz CH2 Vert Deflection factor Same as vertical tlencction Accuracy Y 3 10 to 3 0C X Srr 10 to 3 0C Additional error for magnifier 2 X bandwidth DC to at least 5001i llt Phase error 3 f or Jess from Df to I OOJ...

Page 35: ... and transport temperature fDIMENSIONS AND WEIGHTI Approx 215 W x IIO H x 330 0 mm 8 6 W x 4 4 H x 6 4 0 inch 35 85 45 85 20 70 C Approx 4 5 kg 10 lbs joptionI Accessory pouch Hood Shoulder belt IAD 209 type Battery Batteries Nominal capacity Nominal voltage I0 rechargeable A nickel cadmium cells 1800 mAh 12V Battery execessive discharge protection Instrument operation automatically interruped whe...

Page 36: ...1 2 EXTERNAL VIEW 32 TOP YiC 00 000000 0 0 SIDE view UniL mm 10DEL V 209 ...

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Page 46: ...model V 209 oscilloscope with the should er belt hanged up execute the hooking of the shoulder belt No 8101 as follows I Mount the triangle band clasps on the positions shown in the figure using the screws a 2 Then hang the clasp mounted across the shoulder belt No 8101 into the triangle clasps mounted as 1 Accessory pouch Mount the accessory pouch to the model V 209 oscilloscope I Insert the edge...

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