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Hitachi V-355 Operation Manual

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  • Page 2 ' _ • performed during said one year period providing the product is brought to our Authorized Service Station. Hitachi Denshi, Ltd. further warrants to the original purchaser that upon expiration of the one year free service. warranty period and within two years riginal date of purchase.

  • Page 3: Table Of Contents

    M O D E L V-355 CONTENTS Feature s Accessorie s..........I .

  • Page 4: Features

    FEATURES TY synchronization: Employment of a new TV sync separator circuit allows the V-355 (R) is a portable -type, advanced -class The Hitachi instrument to ob serve TV signals stably. oscilloscope with a handwidth of DC to 3 5 MHz designed with...

  • Page 5: Precautions

    PRECAUTIONS The operating ambient humidity is 3 5 - 8 5 %. Since an accidental intrusion of li q uid may also cause Precautions to be observed to lengthen the service life of trou bles, do not place a liquid-filled containers such as a this instrument.
  • Page 6 Do not apply a heavy shock to the oscilloscope. Do not insert a wire, pin, etc . through the ventilation hole. Do not drag the set, leaving the probe attached to it. When not When not in use, put the dust-proof cover on the instrument and store it with care .
  • Page 7 electricity remains in the condensers of the power Care and repair supply circuit. Removal of stain from the case. Cleaning of CRT When the outside of the case is stained, remove the stain Dirty surface of C RT screen tends to cause measuring errors. by first wiping it lightly with a cloth moistened with neutral washing agent and then wipe the surface with a The screen surface becames acce ssible when the bezel is re­...
  • Page 8 O p eration p recautions this fuse is blows out, check thoroughly the cause , repair any faulty point present, and then replace with a specified Check the line voltage. fuse . Do not try to use the fuse other than the specified ones.
  • Page 11 VG.TM& <..W �U�ll < to-new) 11011 c101-mv) ZZOY (1411""'Jit2:Y) toov HOY (�-a4Y) OSCILLOSCOPE Fig. (R) Rear View V-355...
  • Page 13 GND At this setting the input to the vertical axis ampli­ UNCAL lamp fier is grounded. Light when VAR is out of CAL detent position . At this setting the input signal is directly con­ nected to the vertical axis amplifier and displayed POSITION controls unchanged, including the DC component.
  • Page 14 ALT Signals applied respectively to CH I and CH2 X-Y This position is use d when using the instrument as appears on the screen alternatively at each sweep. an X-Y oscilloscope. In this position the X (horizontal) signal is con­ This setting is used when the sweep time is short in n ec ted to the input of CH I ;...
  • Page 16 changes alternately corresponding to the signals Explanation of trigger LEVEL on CH 1 and CH2 to trigger the signal . TRIG INput connector At the time of (±J SLOPE Input terminal for use for external triggering signal. Trigger LEVEL control PULL ( ) SLOPE the time...

  • Page 17: How To Obtain The Displays

    quency signal (25 Hz or less). HOW TO OBTAIN THE DISPLAYS TV(V) This setting is used when observing the entire vertical picture of television signal. Before turning ON the POWER switch, insure the power supply voltage is within the range of I 08- 1 3 2V for AC TV( H) This setting is used when observing the entire 1 20V set, 1 98-2 42V for AC2 20V set , and 2 1 6-264V for horizontal picture of television signal .
  • Page 18 If the instrume nt is not used with the power supply turned GENERAL MEASUREMENT on rotate the INTENsity counterclockwise to reduce the In the case of observing a single waveform. brightness and also blur the FOCUS. Use CHI or CH2 when not observing the phase differe nce NOTE between two waveforms or when engaging in a operation other than X-Y operation.

  • Page 19: Method For Connecting Signals

    When using only CH2 , use the instrume nt after making the FOR CONNECTING SIGNALS following settings. The first step of measurement is introducing the signal MODE select switch desired to measure to the oscill o scope properly. Do it with Trigger SOURCE utmost care .
  • Page 20 Connection of earth lead wire rotate the trimmer on the matching box of the probe by using a screwdriver until the optimum state is obtained. Capacitance correction trimmer (c) Capacity too (a} Optimum (b) Capacity too large small A good example (3) A bad example (2) At t e of direct connection...

  • Page 22: Measuring Procedure

    DC voltage (after shifting) The first things to do are as follows. Bring the brightness and FOCUS at optimum positions for easy read out. Display the waveform as large as possible to minimize the read e rror. Check the capacity correction when using a probe. (Refer to Paragraph ( I ) "When using a probe"...
  • Page 23 Time A T im e B Measurement of frequency and period (4) Measurement of time difference This will be explained taking the drawing at follows as Triggering signal source "SOURCE" is selected as offering an example. reference signal when me asuring the time difference be­ One period covers the time A and time B , which are sepa­...
  • Page 24 This me ans that CH 1 is used as the triggering signal when period, pay the same attention as give n to high frequency investigating the le ngth of time by which the signal of CH2 signals when handling it . Accordingly, use a probe or coax­ ial cable and shorte n the earth lead wire as much as possible .
  • Page 25 t r = 0.3 5 Y ' Trigger level f c : Frequency band (Hz) Where , setting line tr : Rise time (a) Signal waveform The rise time and fall time are determined by the time elapsed between the 1 0% to 90% values of pulse width. (b) When the trigger (c) When the trigger setting level is Y'...
  • Page 28 (8) How to use TV exclusive synchronization ALTERNATE TRIGGER Jittering wave as shown below may appear on the screen the video waveform of when a gently-sloping signal is displayed by approximately In the work concerned with TV , complexed signals con­ 10 cycles or less, with the VERT MODE for the INT taining video signal, blanking pedestal signal , and syn­...
  • Page 29 Difference in the circuits Exclusive circuit for this Exclusive circuit for conventional oscillograph instrument (Principle drawing) Simple synchronizing exclusive synchronizing General circuit separator circuit circuit Video signal "' To trigger ci rcuit To trigger circuit � To trigger c ircuit Hard to synchronize , because Synchronization is more easily Stable synchronization is ob-...
  • Page 30 Operation The A TT balance of the vertical axis can be made easily. T o o b se r v e h o r iz o n t a l sign a l T o o b se rv e v e r t i c a l sig n a l CH I Set the input coupling switches of GND and set the TRIG MODE to AUTO .

  • Page 31: Maintenance

    SPECIFICATIONS I ) Since semiconductors , prec1S1on components, etc . are employed in this oscill o scope , use at most care for opera­ Type tion and storaRe . 6" screen with internal graticule 3) Side panel can be removed with a screw driver . Approximate 2kV acceleration potential Store this oscilloscope in the ambient temperature from...
  • Page 32 33 kohm (typ.) Input impedance Input impedance 30 V(DC +peak AC) Maximum input voltage Approximately 1 Mil in parallel with 25 p F Maximum input voltage VERTICAL DEFLECTION SYSTEM (2 identical channels) 300V (DC + peak AC) or 5 00 Vp- p AC at I kHz or less Bandwidth and rise time Input coupling DC to at least 35 MHz and rise time 1 0 ns or less DC to...
  • Page 33 Trigger source Maximum input voltage Internal (Ch l , Ch2 , V-MODE), Line , External 300V (DC + peak AC) X-Y OPERATION (CHI ; Horiz , CH2 ; Vert) Trigger slope Deflection factor Same as vertical deflection TV sync polarity X-bandwidth TV (-) DC to at least 5 00kHz...

  • Page 35: External View

    - � Tlla;./D I V � ' " ii!Gill "' - - - - -@§:: ® � OSCJLLOSCOPC v-3 5 5 � ® '° 2 2 0 ± 2 5 . 5 3 1 0 + 2 Unit : V-355 (R)
  • Page 36 SCHEMATIC DIAGRAMS PEF - 6 20 , � A C VERT HODE CH f, on Al7 (HOP ADD Tll!G HOOE CHI, CH2 VER THODE Al/TO FOCUS CONTllOl l B LOC K D I AG RAM...
  • Page 37 Tl?.tsi @ CH{ Vf:il'T S/6/VAL <?> N o te � • A U o the basic cir cuit diagram s are 1 /4W • thout notice . subject to change w A l l re s 1 s ter values and all c a a c iter values ·n micro-...
  • Page 38 $1. S aV/ll>'v J.1111 SIGNA L FllOH AT'Tfa(f;> VERT Diodes : unteu otl/erwise nofed fSS/JJ V E RT P R E A M P T R I G P I C K O F F &...
  • Page 40 R4lS " TRIG Sl6NAf. TO JCSOI � "" E!> -1.11( AVTO A U TO NORN T V · V T V - H � T R I G G E N...
  • Page 41 l./IC ..,.. UN8lANJ< l.lK Qo1- ® ""'" lO)IS fDJIS s,.s z,,s ,,, �, ,,., Y Sig!J(J/ .l)ll .S)l.f Factory od ;ust�d valv e . <§:> SWP G E N...
  • Page 42 <Z> so rv,. 1' $1 ! 49 V ic _ s '(D Ffl011 Rl12 "' TO CRT RISI ., , Rl�� l TR "4 TR861 lSA!OlHJ 1SAtOlff> � '11 .. $61< CH Ski PULSE © FRON fC511 <O> %> H-AMP...
  • Page 43 <?> Z-AM P...
  • Page 45 � Pl3{)6 RVIJll 1 011' Rl310 -!JV UNR£G RVt:JOI Pl:JD1 � R1:10 1 1.11< � RfJ3 RUJlf / H 1S W 4'10k (Prr -'7 •'11 © ro RV1401 (:!) 1 11 RtJ1 4'10K: ® ro CRT '1'1 (:!) ·f:JV PllH (l/Nf/E{j) FRON �...
  • Page 47 M E M O :...
  • Page 48 M EM O :...
  • Page 50 NOTE This instrument should be adjusted at an ambient temperature of +20 ° C for best overall accuracy . Allow at least 1 5 minutes warmup before proceeding. Polyvinyl chloride (PVC) film is attached on the enclosure and the front panel of the oscilloscope to protect the me tal surface .
  • Page 51 R E G I ST R AT I O N CA R D Thank you for purchasing this Hitachi Oscilloscope . In order that we may continue to provide the finest quality and value possible , we would appreciate it if you would...
  • Page 52 N a m e Com p a n y Place Add ress Stamp City Here T elephone N o . FIRST C L ASS POST CARD H itachi Denshi America , Ltd. 1 7 5 Crossways Park West, 1 1 797 Wood b u ry , N ew York U .
  • Page 53 -.. ' '\ ' • I , � ,.. ' '!'! ._...
  • Page 54 HITACHI DENSHI, LTD. 23-2, Kondo Sudo-cha 1- chome, Chiyodo-ku, Tokyo 101, Japan Phon.,(03)255-84 1 1, Tele.,J24178 HITACHI DENSHI AMERICA, LTD. • HITACHI DENSHI, LTD. (CANADA)* Headquarters and New York Officer Head Office: 175 Crossways Pork West, Woodbury, New York 1 1797, U.S.A.

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