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1. FEATURES

The Hitachi

V-355

(R) is a portable-type, advanced-class

oscilloscope with a handwidth of DC to 35 MHz designed with

the emphasis on operability and portability and has following
features.

(I)

Wide bandwidth:

The instrument has a bandwidth from DC to 3 5 MHz.

(2)

High sensitivity:

Sensitivity is 1 m V /div

(3)

Large

screen:

Employment of a large square C RT makes waveforms easier
to observe.

( 4)

Internal graticule:

Employment of an internal graticule CRT permits waveforms

observation to be made without parallax error.

(5)

ALT TRIG

Even an observation of two waveforms of different frequen
cies, the waveform of the each cannel is stably triggered .

(6)

TY synchronization:

Employment of a new TV sync separator circuit allows the
instrument to observe TV signals stably.

(7)

Auto focusing:

Focusing shift is automatically corrected.

2. ACCESSORIES

This instrument is shipped with the following standard

accessories.

Probes (AT- l OAK 1 . 5)
AC power supply cord

Operation manual

Содержание V-355

Страница 1: ...OSCILL OSCOl E OPERATION MANUAL Hitachi Denshi Ltd ...

Страница 2: ... years 1 t from the o 1 riginal date of 1 purchase Hitachi De f nshi L h td d will either r f epair f r or at its so e option rep ace any part except or cat 0 e ray tube uses i t probes lamps batteries and other optional materials which are defective in r either workmanship or material under normal and proper use l After the expiration of the one year free service period and during the addi f i ti...

Страница 3: ...tions 2 4 Controls and connectors 6 5 How to obtain the displays 14 6 Method for connecting signals 16 7 Measuring procedure 17 8 Adjustments 27 9 Maintenance 28 10 Specifications 28 11 External view 32 12 Schematic diagrams 33 I MOD E L V 355 R ...

Страница 4: ...to observe 4 Internal graticule Employment of an internal graticule CRT permits waveforms observation to be made without parallax error 5 ALT TRIG Even an observation of two waveforms of different frequen cies the waveform ofthe each cannel is stably triggered 6 TY synchronization Employment of a new TV sync separator circuit allows the instrument to observe TV signals stably 7 Auto focusing Focus...

Страница 5: ... away from damp air water and dust 2 Unexpected trouble may be caused when the instrument is placed in a damp or dusty place The operating ambient humidity is 35 85 Since an accidental intrusion of liquid may also cause troubles do not place a liquid 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...

Страница 6: ...y to turn the instrument upside down Otherwise knobs may be broken Do not use the instrument upright leaving BNC cable connected to EXT BLANKING terminal on the rear panel Otherwise the cable may be damaged When not in use When not in use put the dust proof cover on the instrument and store it with care When operation is faulty DD I Recheck the operating procedure and if problem persists contact a...

Страница 7: ... using dry brush or by using the exhaust of a compressor or a vacuum cleaner NOTE When opening the case pull out the power supply plug beforehand without fail When cleaning the inside insure beforehand that no electricity remains in the condensers of the power supply circuit Cleaning of CRT Dirty surface of CRT screen tends to cause measuring errors The screen surface becames accessible when the b...

Страница 8: ...hen this fuse is blows out check thoroughly the cause repair any faulty point present and then replace with a specified fuse Do not try to use the fuse other than the specified ones Otherwise fault may be caused or danger may be invited Particularly do not use a fuse different from the specified one in current capacity and in length The standards of the fuses are as follows Dimensions Diameter x l...

Страница 9: ...strument from one operating range to another In addi tion this Selector changes the primary connections of the power transformer to allow selection of one of four regu lating ranges The Selector also includes the line fuse Use the following procedure to convert this instrument be tween nominal line voltage or regulating ranges 1 Disconnect the instrument from the power source 2 To convert from 1 0...

Страница 10: ...Fig 4 1 V 355 R Front View 7 ...

Страница 11: ...0 8 lM VG TM W U ll toov to new 11011 c101 mv ZZOY 1411 Jit2 Y HOY a4Y 22 1 OSCILLOSCOPE x 8 Fig 4 2 V 355 R Rear View ...

Страница 12: ... adjusts the brightness Brightness is increased by rotating INTENSITY clockwise j VOLTAGE SELECTOR Used to select the power sources AC inlet This is inlet for detachable AC power cord 2 Controls of vertical deflection system CHI INPUT connector BNC connector for vertical axis input The signal input to this terminal becomes the X axis Y axis signal when the instrument is used as an X Y oscilloscope...

Страница 13: ...l is left rotated in the direction of the arrow to the full When the knob is at PULL position pulled up state the gain of the vertical axis is magnified 5 times and the maximum sensitivity becomes 1mV DIV UNCAL lamp Light when VAR is out of CAL detent position POSITION controls This knob is used to adjust the position of the vertical axis The display rises with a clockwise rotation of this knob an...

Страница 14: ...ilable in I9 steps from 0 2 µs div to 0 2s div X Y This position is used when using the instrument as an X Y oscilloscope In this position the X horizontal signal is con nected to the input of CH I the Y vertical signal is applied to the input of CH2 and has a deflection range from less than one millivolt to 5 volts div at a reduced band width of 500 kHz SWP VARiable control This control works as ...

Страница 15: ...eed obtained by TIME DIV in other words the reading is l IO of the sweep time indicated 4 Synchronization system SOURCE select switch INT LINE EXT This switch is used to select the triggering signal source INT The input signal applied to CHI or CH2 becomes the triggering signal LINE This setting is used when observing a signal with power supply line frequency EXT External triggering signal applied...

Страница 16: ... at time of SLOPE Pull at time of 8 SLOPE _ Explanation of trigger LEVEL 0 At the time _ of J SLOPE Atthe time o of8 SLOPE Trigger MODE select switch AUTO The instrument is brought into automatically triggering sweep in which sweep is always con ducted In the presence of triggered signal normal triggered sweep is obtained and the waveform stands still In the case of no signal or out of triggering ...

Страница 17: ...al of the oscilloscope 5 HOW TO OBTAIN THE DISPLAYS Before turning ON the POWER switch insure the power supply voltage is within the range of I 08 1 32V for AC 1 20V set 1 98 242V for AC220V set and 2 16 264V for AC 240V set Insert the plug of the power cord on the rear panel into the wall outlet and set the controls as follows POWER CD OFF INTENSITY Counterclockwise to the full FOCUS Midrange AC ...

Страница 18: ...een by properly adjusting the semi fixed variable resistor TRACE ROTATION on the front panel GENERAL MEASUREMENT 1 In 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 CH I MODE select switch QY CH I Trigger MODE switch AUTO Trigger SOUR...

Страница 19: ... signal desired to measure to the oscilloscope properly Do it with utmost care 1 When using a probe Use the attached probe AT 10AK1 5 when measuring a high frequency wave with high accuracy It should be noted however that since the input signal is attenuated by this probe to 1 10 before it is input to the oscilloscope the use of the probe is disadvantageous for low level signals and that at the sa...

Страница 20: ...c rotate the trimmer on the matching box of the probe by using a screwdriver until the optimum state is obtained L Capacitance correction trimmer a Optimum b Capacity too small 2 At tiipe of direct connection c Capacity too large When connecting a signal directly to the oscilloscope not using the attached probe AT 10 AK1 5 1 0 1 pay atten tion to the following points in order to minimize the mea s...

Страница 21: ...it to be measured o The stray capacity of the shielded wire must be taken into account when performing measurement with a long shielded wire Since the shielded wire normally in use has a capacitance of about 1 00 pf per meter its effect on the circuit to be measured cannot be ignored Use a probe to minimize the effect on the circuit o When the length of the shielded wire used or when the length of...

Страница 22: ...by multiplying the shift width by the indicated value of VOLTS DIV When VOLTS DIV is 50 mV DIV then 50 mV div x4 2 2 1 0 mV However if the probe AT 1 0 AJ 1 5 is in use the true value of the signal becomes 10 times the value or 50 mV div x 4 2 x 1 0 2 I V DC voltage after shifting Zero level reference line 2 AC voltage measurement The same as paragraph 7 I DC voltage measurement but here those is ...

Страница 23: ... 1 2 0 x 1 0 3 500 Hz However when the knob MAG x l O is at pulled out posi tion TIME DIV must be converted to 1 1 0 since the sweep is magnified Time A Time B 4 Measurement of time difference Triggering signal source SOURCE is selected as offering reference signal when measuring the time difference be tween two signals Assume that pulse trains as shown in a Then b shows the case when CH 1 is take...

Страница 24: ...gher harmonics 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 relationship exists between the...

Страница 25: ...a case rotate LEVEL clockwise until the trigger level comes to Y line Then the waveform on the screen be comes the one is shown in Fig c which start with B and advances to C E F and which allows synchroniza tion A C Ec c KL JY 1 F J L P a Signal waveform Y Trigger level y setting line b When the trigger setting level is Y c When the trigger setting level is Y Synchronization of complexed waveform ...

Страница 26: ...h to ALT the input signals applied to CH I and CH2 become trigger source alternatively at each sweep Consequently even for an observation of two wave forms of different frequencies the waveform of the each channel is stably tiggered In this case the signal should be applied to both CHl and CH2 and the two signals have the same level portion in excess of the rated amplitude each other There should ...

Страница 27: ...icient amplitudes The VERT MODE triggering requires 1 5 div more than the amplitude required for an observation of CH I or CH2 CHI ov CH2 ov Fig 2 The VERT MODE triggering is not possible when the signal is applied to only one channel as illustrated on Fig 3 24 cH2 ov Fig 3 Cautions Do not use the INT TRIG to the VERT MODE when VAR tfS and or are in the pulled out PULL xS GAIN 9 position xS GAIN m...

Страница 28: ...ear observation of each signal set the MODE select switch to the CH I or CH2 8 How to use TV exclusive synchronization CD On the video waveform of TV In the work concerned with TV complexed signals con taining video signal blanking pedestal signal and syn chronizing signal are often measured However since the waveform is complexed a special circuit is needed to effect a stable synchronization with...

Страница 29: ...more easily video signal is applied directly as effected than in the circuit trigger signal 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 v L T r_ i I To trigger r circuit Stable synchronization is ob tained since SYNC pulse is picked up amplified and then integ...

Страница 30: ...only synchronizing signal REFERENCE Video signal Synchronizing signal a Example of synchronizing signal b Example of synchronizing signal The ATT balance of the vertical axis can be made easily CD Set the input coupling switches of CHI and CH2 to GND and set the TRIG MODE to AUTO Then position the base line to the center rum the VOLTS DIV switch to SmV IOmV and ad just so that the base line does n...

Страница 31: ...from 10 to 60 C 10 SPECIFICATIONS JcRTJ Type 6 screen with internal graticule Approximate l 2kV acceleration potential Phosphor P3 l standard Graticule 8 x 10 div div 1 0 mm Internal graticule Focussing Trace rotation Brightness adjustment Scale illumination Possible with automatic focus correction circuit Provided Possible Variable IZ AXIS INPUf INTENSITY MODULATION DC coupled positive going sign...

Страница 32: ...s sensitivity of each deflection factor setting to l mV div Accuracy 3 Additional error for magnifier 2 Display modes CH l CH2 normal or invert Alternate Chopped approximate 250kHz Added Input impedance Approximately 1 Mil in parallel with 25 pF Maximum input voltage 300V DC peak AC or 500 Vp p AC at I kHz or less Input coupling AC GND DC IHORIZONTAL DEFLECTION SYSTEMI Time base 0 2µs div to 0 2s ...

Страница 33: ...ely 25 Hz Trigger coupling AC 20 Hz to full bandwidth External trigger input impedance Approximately 1 Mil in parallel with 25 pF Maximum input voltage 300V DC peak AC I X Y OPERATION CHI Horiz CH2 Vert I Deflection factor Same as vertical deflection X bandwidth DC to at least 500kHz Phase error 3 or less from DC to 50kHz ICALIBRATOR I An approximate l kHz 0 5V 3 square wave ISIGNAL OUTPUT I CHI V...

Страница 34: ...n Approx 30W ENVIRONMENT Limit of operation temperature Limit of operation humidity Rated range of use temperature Rated range of use himidity Storage and transport temperature DIMENSIONS AND WEIGHT 0 to 40 C 32 to 1 04 F 35 to 85 IO to 35 C 50 to 95 F 45 to 85 20 to 70 C 4 to I 58 F Approx 3 10 W x I 30 H x 370 D mm 12 4 W x 5 2 H x I4 8 D inches Approx 6 kg I 3 5 lbs 31 ...

Страница 35: ...11 EXTERNAL VIEW 32 TOP V I EW REAR V I EW N FRONT V I EW I OSCJLLOSCOPC v 355 I 5 V 355 R 0 Tlla D I V QI Q a M 2I i I ii Gill e a 2 2 0 2 3 1 0 2 if1 ffi ir ii a 31 ff j I D N 1 N 5 5 Unit mm ...

Страница 36: ...12 SCHEMATIC DIAGRAMS lcHtl AC JC J VERT HODE CHf on Al7 HOP ADD Tll G HOOE CHI CH2 VERTHODE Al TO FOCUS CONTllOl l PEF 6 20 A C 3V BLOC K DIAG RAM 33 ...

Страница 37: ...Note r the basic cir thout notice 1 AU o to change w 1 hm 1 4W subject ter values rn n micro 2 All re s1s a aciter values l and all c p indicated farad unles lected values 3 Factory s CH Vf il T S 6 VAL TO Tl tsi I NPUT AMP ...

Страница 38: ...CHI VERT SIGNAL FllOH AT Tfa f Diodes fSS JJ unteu otl erwise nofed 1 SaV ll v J 1111 V E RT PR EAMP i T R I G P I C KOF F CH SW M U LTI 35 ...

Страница 39: ...36 Pff 6 4 FROH DElAY LINE 0 PJOf Pll 0 _ iRJJf 1SA11fl t RJSS 8Z iR JSO 1SC7 0f i V OUT ...

Страница 40: ..._ _ _J I I I 418 E e 1 11 AUTO NORN TV V T V H R4lS AVTO TRIG Sl6NAf TO JCSOI _ _ f t 1D JC501 r TRIG GEN 37 ...

Страница 41: ... 38 j lO IS fDJIS s s z s S l f l ll X Y Factory od ust d valv e l IC l lK UN8lANJ Qo1 0 0 Y Sig J J SWP G E N ...

Страница 42: ... Ffl011 ic_s D t il 0 1oos1 Rl l TR 4 lSA OlHJ TR861 1SAtOlff _ r o o ___ l t o t O i CH Ski PULSE FRON fC511 0 RIU 61 11 RISI JJO Rl12 I 1 1 49V sorv TO CRT Z TO CRT 0 H AMP 39 ...

Страница 43: ... HV and Z AMP 40 ...

Страница 44: ... I c__ _ _ _ o _ _ _ _ _ _ _ _ _ IOIJ FllOI pllD1 A 100 llOV IA 2l0 Uo v T1fl N U 11 r MAIL HAf7 01 II J t l fflf J I U ll JI HA1 60 Sf l u L TOO I Rn L_ _ V t NE TRJG TOl N0 __ 6 J V P f 7 1 N0 1 14 L v 0 IPEP 6 2 f s V POWE R SUPPLY 41 ...

Страница 45: ... Pl JD1 Rl310 Ok JV UNR G RVIJll l 1011 av TO I i I k 0 0 RVt JOI 0 TO P90 I 0 I ro CRT Prr 7 11 ro CRT P F 1 1 0 R1 101 1 11 IV RUJlf RV1401 4 10k 1 11 RfJ3 H1SW Iv RtJ1 4 10K 8V L tt o f JV l Nf E j I _ _J FRON PllH ...

Страница 46: ...INT TR 6 SIGNAL 460 PEF 6l0 V PRE H SW TRIG P Ck OFF v o11r CHI Ollr CAL J1 PIJ04 I J PEF 6l5 POWER FOCllS TEL Jn INTEN P JOJ __ J RED UO J PIOJS W I R I NG D IAG RAM 43 ...

Страница 47: ...MEMO 44 ...

Страница 48: ...M EMO 45 ...

Страница 49: ...46 ...

Страница 50: ...urface If the PVC film is damaged by scratches remove it o To clean the enclosure or the front panel use neutral detergent Refrain from using thinner benzine alcohol or other chemicals o For safety operation be sure to connect the ground lead of the GND ground terminal to earth ground if a two wire AC power system is used Failure to complete the ground system may allow the chassis and cabinet of t...

Страница 51: ...O Warranty 2 What specifications meet your req u i re ments O Bandwidth O Ma x i m u m sensi tivity O Ma x i m u m sweep time 0Battery operation O Size and weight O Other 3 How many oth e r peop le in your company w i l l be using this osc i l l oscopes __ peop le 4 What other osc i l l oscopes do you use 5 What i s you r appl ication field for this H i tach i Osci l l oscope O M a n u factu r i n...

Страница 52: ...ss City st at e _ _ _ _ _ _ _ Zip _ _ _ _ Telephone No FIRST CLASS POST CARD Hitachi Denshi America Ltd 175 Crossways Park West Woodbury N ew York 1 1797 U S A Attn Test and Measu ring Equipment Division Place Stamp Here ...

Страница 53: ... l l It j I l J l l I f l I I t r t I i I I _ i l I I r I t r c 1 1 r l _ I ...

Страница 54: ... 8356 Denver Office 3538 p o Bldg 3 Suit 505 Aurora Colorado 80010 U S A Phone 303 344 3156 FAX 303 364 8394 Seattle Office 370 Upland Drive Tukwila Washington 98188 U S A Phone 206 575 1680 Distribution Center 1051 Andover Pork WHt Tukwila Washington 98188 U S A Phonoo 206 575 1690 FAX 206 575 3320 206 575 1778 TWX 910 444 2155 HITACHI DENSHI LTD CANADA Head Office 65 Melford Drive Xorborough Ont...

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