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Kenwood CS-1352 Instruction Manual

Dual trace oscilloscope
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T R I G G E R E D S W E E P O S C I L L O S C O P E
C S - 1 3 5 2
DUAL T R A C E OSCILLOSCOPE
I N S T R U C T I O N MANUAL

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Summary of Contents for Kenwood CS-1352

  • Page 1 T R I G G E R E D S W E E P O S C I L L O S C O P E C S - 1 3 5 2 DUAL T R A C E OSCILLOSCOPE I N S T R U C T I O N MANUAL...
  • Page 2 F E A T U R E S * Time base switch allows changeover between * Vertical axis provides high sensitivity and wide CHOP and A L T and between V (vertical) and H band width, 2 mV/div, 15 MHz ( - 3 dB). (horizontal) T V sync separator...
  • Page 3 S P E C I F I C A T I O N S Linearity: T y p e of Cathod R a y T u b e : C 3 3 1 P 3 1 B Better than 3 % (2)us/div ~ 0 5 s / d i v ) Acceleration Voltage: Better than 5% (0.5jus/div ~...
  • Page 4 Dimensions and Weight Input I m p e d a n c e : 10kfi ± 2 0 % Width: Frequency R e s p o n s e : 2 1 0 mm DC ~ 1 MHz Height: M a x i m u m Input A l l o w a b l e Voltage: 136 mm 50V (DC + A C peak)

  • Page 5: Front Panel

    C O N T R O L S ON P A N E L S FRONT PANEL Fig. S I D E PANEL Fig. 2...
  • Page 6 7. V O L T S / D I V 1 . $ P O S I T I O N Vertical attenuator Channel which Vertical position adjustment for CH1 trace and Y position for X - Y operation. Waveforms can provides step adjustment of vertical sensitivi- ty.
  • Page 7 1 5 . F O C U S slightly decreased. Spot focus control obtain optimum 2 1 . S W E E P T I M E / D I V waveform according to brightness. Horizontal coarse s w e e p time selector.

  • Page 8: Operation

    33. C O R D R E E L External DC power jack to supply 11 ~ 1 5.5V DC power. Used to wind power cord when the os- cilloscope is to be carried or stored. It also 32. V O L T A G E N A M E P L A T E serves as a stand when the oscilloscope is Be sure to use voltage and fuse specified.

  • Page 9: Power Supply

    difference between C H 1 and CH2 is displayed sure that the red lead is connected to " + " and (CH1 - CH2). the black lead to " — " side. 5. When the signal voltage is more than 2 m V and * After the batteries have been connected, insert waveform fails to appear on the screen, the os- the battery case from the rear and replace the...
  • Page 10 nector plug must be disconnected while the battery B E Z E L is being charged. H O O D When the battery is almost fully charged, the C H A R G E lamp becomes dim and finally goes off. Continue charging for about 2 hours, then the battery will have been fully charged.
  • Page 11 waveform. In this case, the output waveform is precise measurement can be measured. A more shifted with respect to the leading edge of the precise measurement can be obtained if the Tp por- reference frequency pulse by a time interval cor- tion of the waveform is expanded horizontally.
  • Page 12 Fig. 8 Typical digital circuit using several time-related waveforms...
  • Page 13 waveforms No. 4 through No. 8 and No. 10, would any of the waveforms may be displayed without be displayed on Channel 2 although other timing readjustment T R I G L E V E L control. comparisons may be desired. Waveforms No.
  • Page 14 Distortion M e a s u r e m e n t : 7. Adjust C H 1 and C H 2 vertical sensitivity con- trols ( V O L T S / D I V and V A R I A B L E ) so that the A n amplifier stage, or an entire amplifier unit, may waveforms are as large as possible without ex- be tested for distortion with this oscilloscope.
  • Page 15 can be examined more closely either by increasing Fig. 12 demonstrates the typical oscilloscope set- the sweep time or by pulling the POSITION tings a s well as the basic test circuit. Typical input control to obtain 5 times magnification. and output waveforms are shown on the os- cilloscope display.
  • Page 16 S t e r e o Amplifier S e r v i c i n g : Amplifier Phase Shift Measurements: Another convenient use for dual-trace oscilloscope Phase measurements can be made by several is in troubleshooting stereo amplifiers. If identical methods using oscilloscope.
  • Page 17 shown in Fig. 15B. The distance between cor- cilloscope control setting for viewing the alternate responding points on the horizontal axis for the two V I T S . w a v e f o r m s then represents the phase shift Most network television signals contain built-in...
  • Page 18 signal, followed by sine wave frequencies of 0.5 MHz, 1.0 MHz, 2.0 MHz, 3.0 MHz, 4 . 0 MHz and 3.58 MHz. This sequence of frequencies is called the "multi-burst". This multi-burst portion of the V I T S is the portion that can be most valuable to the technician.
  • Page 19 then our reasoning is right, and the IF amplifier the control in a counterclockwise direction requires realignment. If the poor response at 2 moving the traces to the left until the expand- ed information appears a s shown in Fig. 16. Because of the low repetition rate and the high the tuner input is misadjusted, causing a bite on only one channel.
  • Page 20 Composite Video Waveform Analysis normal signals. This method (signal-tracing) may be used to trace a signal by measuring several Probably the most important waveform in televi- points in the signal path. measurements sion and video servicing is the composite waveform proceed along the signal path, a point may be consisting of the video signal, the blanking pedestal found where the signal disappears.
  • Page 21 1. Tune the television set or video recorder blanking pulses are negative, use the " — " receiver to a local channel. position. A test tape or a signal generator also can be 13. Push in the T R I G L E V E L control and rotate to a used for service work.
  • Page 22 FM R E C E I V E R A D J U S T M E N T S 5. Set the marker generator precisely to 10.7 MHz. The marker "pip" should be in the Procedure: center of the bandpass. 1.
  • Page 23 A U D I O S I G N A L G E N E R A T O R V E R T I C A L A U D I O H O R I Z l O N T A L S I Z E S I Z E N E T W O R K B E I N G...
  • Page 24 Frequency M e a s u r e m e n t : tains a large number of odd harmonics. By injec- ting a 5 0 0 Hz sine w a v e into an amplifier, w e can 1. Connect the sine wave of known frequency to evaluate amplifier response at 5 0 0 Hz only, but by the C H 2 input jack of the oscilloscope and set injecting a square wave of the same frequency w e...
  • Page 25 venient viewing height. of A G - G N D - D C switch. However, the A C 5. Adjust the s w e e p time controls for one cycle of position may be used without affecting the square wave display on the screen. result except at very low frequency (below 5 6.
  • Page 26 In a typicaf wide band amplifier, a square wave check reveals many distortion characteristics of the circuit. The response of an amplifier is indicated in Fig. 20. revealing poor low-frequency response along with the overcompensated high-frequency boost. A 1 0 0 Hz square w a v e applied to the input of this amplifier will appear as in Fig.
  • Page 27 practically infinite number harmonic com- a leading direction. F i g . 3 5 indicates a 1 0 ° phase ponents. If an abnormal rise in amplifier response shift in a low frequency component in a lagging occurs at gigh frequencies, the high frequency direction.
  • Page 28 Fig. 37 indicates high frequency boost in an amplifier accompanied by a lightly damped " s h o c k " transient. The sinusoidal type of diminishing oscillation along the top of the square w a v e indicates a transient os- cillation in a relatively high "...

  • Page 29: Maintenance And Adjustment

    P R E C A U T I O N S 7. Installation of oscilloscope 1. Do not use the unit in any of the following The carrying handle of the unit turns 9 0 degree locations: angle in either direction (See Fig. 40), permit- * Places where the unit is exposed to direct ting the unit to be placed horizontally, vertical- sunlight.
  • Page 30 Caution: 3. Adjustment of Cut-off Voltage Connect an external DC power (12V) to the Before removing the case, be sure to turn off the battery connecting leads. Adjust V R 5 0 2 on power. Note that a high voltage ( 1 5 0 0 V max) is the power supply circuit board so that the present on the C R T socket and the printed circuit power lamp goes off when the voltage is...
  • Page 31 H O R I Z O N T A L C I R C U I T P O W E R S U P P L Y C I R C U I T B O A R D B O A R D ( T O P V I E W ) ( B O T T O M...
  • Page 32 CS-1352 SCHEMATIC DIAGRAM...
  • Page 33 KENWOOD CORPORATION 17-5, 2-chome, S h i b u y a , S h i b u y a - k u , T o k y o 150, J a p a n ©...