Kenwood CO-1303D User Manual Download

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H I G H S T A B I L I T Y

7 5 m m O S C I L L O S C O P E

I N S T R U C T I O N M A N U A L

C O - 1 3 0 3 D

Summary of Contents for CO-1303D

Page 1: ...H I G H S T A B I L I T Y 75mm OSCILLOSCOPE INSTRUCTION MANUAL C O 1 3 0 3 D ...

Page 2: ... Description 5 4 Operating Instructions 6 5 A p p l i c a t i o n s 15 6 C a u t i o n on Handling the S c o p e 1 9 7 A d j u s t m e n t 2 0 8 Maintenance 2 4 9 Parts L i s t 2 6 10 P C B o a r d 2 8 1 1 S c h e m a t i c Diagram 2 9 12 B l o c k Diagram E x t e r n a l V i e w 2 9 ...

Page 3: ... used for b o t h vertical and horizontal axis A l l transistorized c i r c u i t r y provides low p o w e r c o n s u m p t i o n and low heat generation C o m p a c t and lightweight easily portable T h e angle of bright line displayed on the cathode ray tube can be easily corrected at the rear of the oscilloscope w i t h o u t removing the case T h e cathode ray tube uses b l u e g r e e n B 3 ...

Page 4: ...0 k H z w i t h E X T G A I N C o n t r o l set at m a x i m u m D C to a p p r o x 4 0 k H z w i t h E X T G A I N C o n t r o l set at mid range Input impedance 1 M 2 20 shunted by 3 5 p F m a x S Y N C INT A t t e n u a t o r E X T G A I N C o n t i n u o u s l y variable to zero Rated m a x i m u m input voltage 1 0 0 V p p S W E E P C H A R A C T E R I S T I C S S w e e p f r e q u e n c y 10...

Page 5: ...etter 2 2 MQ shunted by 2 5 p F or less A C 2 3 0 1 1 7 V 5 0 6 0 H z 16 W D I M E N S I O N S W i d t h 7 1 2 1 9 0 m m Height 6 1 5 4 m m D e p t h 1 1 2 7 3 2 3 0 0 m m Overall dimensions include all protrusions W E I G H T A p p r o x 8 3 6 lbs 3 8 kg A C C E S S O R Y R e p l a c e m e n t fuse 0 3 A 2 0 5 A 2 Input cord C A 4 6 Instruction manual 1 1 ...

Page 6: ... saw tooth generator comprising transistors Q 1 1 2 and Q 1 1 3 e m p l o y s a unique circuit w i t h facilities for stabilizing the D C level T h e horizontal amplifier is a direct coupled highly stable differential amplifier e m p l o y i n g an F E T Q 1 1 4 and silicon transistors Q 1 1 5 and Q 1 1 6 T h e f r e q u e n c y response is f r o m D C to greater t h a n 2 5 0 k H z It a l l o w s...

Page 7: ...s y n c h r o n i z i n g and an external horizontal signal Use grounding terminal 4 as the c o m m o n grounding t e r m i n a l 4 1 G r o u n d i n g t e r m i n a l 5 V E R T I N P U T Input terminal for the vertical signal Note that terminals 4 and 5 are spaced for inserting a dual banana plug 6 A C D C Selector s w i t c h for the vertical input coupling capac itor In the D C position the s w...

Page 8: ...D is provided for making D C B A L adjustments 8 V G A I N V e r t i c a l gain c o n t r o l T h i s c o n t r o l operated in c o m bination w i t h vertical attenuator V A T T 7 provides facilities to provide an appropriate a m p l i t u d e on the cathode ray tube screen If it is impossible to adjust the w a v e f o r m to an appropriate amplitude b y operating this c o n t r o l t u r n the v...

Page 9: ... signal w a v e f o r m on the cathode ray tube screen When the S W E E P R A N G E selector s w i t c h 1 1 is in the E X T position this control provides facilities to adjust the gain of the signal connected to the H O R E X T I N P U T terminal 3 to change the amplitude of the horizontal signal on the cathode ray tube screen Note that the horizontal f r e q u e n c y response varies w i t h the...

Page 10: ...the cathode ray tube screen C l o c k w i s e rotation of this control increases the w a v e f o r m brightness 18 F O C U S T h e f o c u s a d j u s t m e n t provides the means to adjust the w a v e f o r m appearing on the cathode ray tube for m a x i m u m clarity 19 Z A X I S I N P U T T e r m i n a l for intensity m o d u l a t i o n T h i s terminal requires an A C voltage of a p p r o x 2...

Page 11: ...plitude of a p p r o x 6 D I V T h e n set the S W E E P R A N G E selector s w i t c h 1 1 to the range including the f r e q u e n c y fo the signal voltage t o be observed or the n e x t c o u n t e r c l o c k w i s e range T u r n the S W E E P V A R I E X T G A I N control 1 2 until the screen displays a w a v e f o r m w i t h the n u m b e r of cycles adequate for observation generally thr...

Page 12: ...n such a case t u r n the V A T T 7 or V G A I N control 8 c o u n t e r c l o c k w i s e until the w a v e f o r m is brought back to an appropriate position Amplitude Positive square wave With A C D C selector switch set at position D C Fig 2 Measurement of A C and DC components A n y voltage measurements made on an oscilloscope are made in p p or peak values Because the effective or rms value ...

Page 13: ...OPERATING INSTRUCTIONS 12 Waveform Effective Value r m s 2 7 3 0 3 5 4 A A y 0 5 A y 0 7 0 7 A Waveform Effective Value r m s 0 2 8 8 A A y 0 5 A ...

Page 14: ...ube screen has an amplitude of a p p r o x 6 D I V S l o w l y v a r y the o u t p u t f r e q u e n c y of the generator until the w a v e f o r m appears as one of the f o l l o w i n g figures Fig 3 Frequency measurement by Lissajous figure T h e f r e q u e n c y of signal oscillator and the u n k n o w n f r e q u e n c y are equal w h e n the w a v e f o r m becomes a straight line an ellips...

Page 15: ...igure and the length of figure on the horizontal a x i s w h i c h are given as X and x respectively in f o l l o w i n g figure A n d the phase difference 8 is given b y S i n 9 x X Fig 4 Phase measurement by Lissajous figure Fig 5 Representative Lissajous patterns Note that if the E X T G A I N control 1 2 is kept in the f u l l y c l o c k w i s e position in the above m e a s u r e m e n t the...

Page 16: ...hode ray tube screen using the d B scale for various major frequencies Plot the amplitude readings thus obtained against the frequencies and y o u can obtain a general amplitude f r e q u e n c y characteristic as s h o w n in the Fig 6 If the tone a n d o r loudness controls on the amplifier are adjusted appropriately then the characteristic curve w i l l be changed as s h o w n in the F i g 7 No...

Page 17: ... e c t the signal to be m e a s u r e d to D I R 2 1 and G N D 2 0 CO 1303D Rear Panel 50Q 75Q Dummy Load Fig 8 Connected example of direct deflection terminals R e m a r k T h e d u m m y load should be of a non inductive type as this may affect high frequency characteristics of the unit Frequency response of amplifier Square wave output 100Hz I KHz Gain reduced at high frequency Gain rises at hi...

Page 18: ... e n t M a k e connections as s h o w n in the F i g 8 A f t e r obtaining a w a v e f o r m on the C R T measure m a x i m u m a m p l i t u d e A a n d m i n i m u m a m p l i t u d e B as s h o w n in the F i g 9 T h e degree of m o d u l a t i o n can be f o u n d f r o m the equation in the F i g 9 2 Measurement of Morse code envelopes E m p l o y the same c o n n e c t i o n s as for the mod...

Page 19: ... t p u t of a t w o t o n e generator for e x a m p l e 5 0 0 H z and 1 5 0 0 H z to the m i c r o p h o n e input j a c k of the S S B transmitter to observe m o d u l a t i o n W a v e f o r m s as s h o w n in the F i g 11 are satisfactory however if peaks or nodes are dull or flat the signal m a y be spluttering Note however that such distorted w a v e f o r m s can also appear w i t h an exce...

Page 20: ...oltages d W h e n using another p o w e r source change the w i r i n g f o r voltage conversion on the first w i n d t e r m i n a l of p o w e r t r a n s f o r m e r w i t h i n t h e set to an appropriate position depending o n the source selected R e p l a c e the existing fuse w i t h 0 5 A fuse for operation f r o m a 117 V p o w e r source or a 0 3 A fuse for 2 3 0 V p o w e r source opera...

Page 21: ... before making this adjustment b A d j u s t m e n t of H O R G A I N 1 A p p l y a signal of 3 V p p at a p p r o x 1 k H z to the H O R E X T I N P U T terminals 3 a n d 4 4 With S W E E P R A N G E selector s w i t c h 1 1 set at the E X T position t u r n the S W E E P V A R I E X T G A I N control 1 2 to the f u l l y c l o c k w i s e position T u r n H O R G A I N 1 6 w i t h n a r r o w ti...

Page 22: ... u r n S W E E P R A N G E selector s w i t c h 1 1 t o the 1 0 0 1 K position and adjust the S W E E P V A R I E X T G A I N control 1 2 so as to m a k e the w a v e f o r m include t w o to f o u r cycles C h e c k that the w a v e f o r m under the above condition is a good square w a v e and then t u r n the vertical attenuator V A T T 7 to position 1 10 T h e n increase the o u t p u t of sig...

Page 23: ...C o r r e c t i o n of C a t h o d e R a y T u b e Position f o r T i l t see F i g 15 L o o s e n the s c r e w A holding the C R T mounting plate at the rear Place the oscilloscope o n the normal operating position P u t the blade of a screwdriver in the slit B to t u r n the C R T m o u n t i n g plate for setting the bright line c o r r e c t l y against the scale graduation C a r e f u l l y ...

Page 24: ...ADJUSTMENT 23 Fig 15 Correction of C R T position ...

Page 25: ... v e the cabinet case f r o m the unit 2 R e m o v e the s o c k e t f r o m the cathode ray tube 3 R e m o v e t w o screws A holding the C R T m o u n t i n g plate see F i g 1 5 4 Pull out the C R T w i t h m o u n t i n g plate f r o m the case 5 L o o s e n t w o screws retaining the C R T band to remove the shielding plate f r o m the C R T C A U T I O N Handle the cathode ray tube w i t h u...

Page 26: ... p o w e r t r a n s f o r m e r is w i r e d as s h o w n in F i g 17 If the oscilloscope is to be operated on another voltage change the wiring and re solder referring to F i g 17 Fig 17 Voltage conversion e R e p l a c e m e n t of F u s e 1 A l w a y s disconnect p o w e r supply before replacing a fuse 2 R e m o v e the cabinet case f r o m the unit 3 R e m o v e the fuse inserted in its hold...

Page 27: ...ual D32 0075 04 Switch stopper E01 1403 05 CRT socket E21 0131 35 Terminal black E 2 1 0 3 0 1 0 5 Terminal board 3P E30 0545 05 AC cord with plug F05 3011 05 Fuse 0 3A F05 5013 05 Fuse 0 5A F11 0189 13 CRT shield F15 0138 04 Felt F15 0163 04 Felt F19 0210 04 Patch G 1 3 0 0 6 8 0 4 Cushion G 1 3 0 0 4 2 0 4 Cushion H01 5818 14 Packing case individual packing H10 2830 02 Packing material foamed st...

Page 28: ... RD14BB2E472J Carbon 4 7k0 5 1 4W R124 RD14BB2E391J Carbon 3 9 0 0 5 1 4W R125 126 RD14BB2E221J Carbon 2 2 0 0 5 1 4 W R127 RD14BB2E681J Carbon 6 8 0 0 5 1 4W R128 RD14BB2E330J Carbon 330 5 1 4W R129 130 RS14AB3F392J Metal film 3 9k0 5 3 W R131 RD14BB2E124J Carbon 120k0 5 1 4W R 32 133 RD14BB2E273J Carbon 27kO 5 1 4W R134 RD14BB2E472J Carbon 4 7k0 5 1 4W R135 RD14BB2E124J Carbon 120k0 5 1 4W R136 ...

Page 29: ...P C BOARD 20 10 P C B O A R D ...

Page 30: ...C 0 I 3 0 3 D ...

Page 31: ... A L V I E W DC AC 75ARB31 NOR NOR HOR O E X T H AMP Q8 Q10 POWER SUPPLY BLOCK DIAGRAM of CO 1303D V A T T V AMP Q1 Q 5 DIR DIF1 V DIR Z A X I S INPUT 1 3 0 0 V 15V 170V 1 5 V 8V SWEEP G E N E R A T O R Q6 Q7 INPUT E X T BOTTOM PANEL FRONT PANEL REAR PANEL E X T E R N A L VIEW of CO 1303D ...

Page 32: ...1 A product of KENWOOD CORPORATION 17 5 2 chome Shibuya Shibuya ku Tokyo 150 Japan PRINTED IN JAPAN B50 1 445 20 G 8 8 1 2 ...

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