Kenwood RA-920 Instruction Manual
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Kenwood RA-920 Instruction Manual

Resistance attenuator
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RA-920
RESISTANCE ATTENUATOR
INSTRUCTION MANUAL

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Summary of Contents for Kenwood RA-920

  • Page 1 RA-920 RESISTANCE ATTENUATOR INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    Y o u are n o w t h e o w n e r o f o u r n e w p r o d u c t R A - 9 2 0 . T h i s u n i t has b e e n c a r e f u l l y e n g i n e e r e d a n d m a n u - f a c t u r e d u n d e r o u r r i g i d q u a l i t y c o n t r o l a n d s h o u l d give y o u s a t i s f a c t o r y a n d d e p e n d a b l e o p e r a t i o n f o r m a n y y e a r s .

  • Page 3: Features

    FEATURES SPECIFICATIONS A c c u r a t e a t t e n u a t i o n o v e r a w i d e range f r o m F r e q u e n c y Range: DC-1 M H z M H z .

  • Page 4: Circuit Descri Ption

    CIRCUIT DESCRI PTION a n d t h e a c c u r a c y is f u r t h e r i m p r o v e d . 1 . O u t l i n e o f C i r c u i t A c c o r d i n g l y , w h e n t h e a t t e n u a t i o n per s t e p is 6 0 d B , t h e F i g .

  • Page 5: Control Panel

    CONTROL PANEL Fig.
  • Page 6 CONTROL PANEL R e f e r e n c e M a r k i n g D e s c r i p t i o n s N o . I n p u t t e r m i n a l : C o n n e c t a s h i e l d e d c a b l e o r c o a x i a l cable b e t w e e n t h e signal s o u r c e a n d t h i s I N P U T t e r m i n a l .

  • Page 7: Cautions

    CAUTIONS 1 . T h e signal v o l t a g e a p p l i e d t o I N P U T s h o u l d be l o w e r i n g e q u a t i o n : £...

  • Page 8: Applications

    , e t c . is l o w e r t h a n 6 0 0 o h m , t h e e r r o r b e c o m e s larger. Amplifier under test Oscillator RA-920 voltmeter F i g . 3...
  • Page 9 1 0 0 k H z , t h e signal is p r o p e r l y s h e i l d e d a n d t h e l o a d i m p e d a n c e is a d e q u a t e . Oscilloscope Speaker RA-920 amplifier 60on T R I G...
  • Page 10 M e a s u r e m e n t o f noise s h o u l d b e p e r f o r m e d a f t e r c h e c k - i n g t h e c i r c u i t s y s t e m . Signal generator Auxiliary Amplifier Variable AC voltmeter amplifier attenuator under test noise generator RA-920 F i g . 6...

  • Page 11: Parts L I S T

    PARTS LIST OF RA-920 SCHEMATIC SYMBOL P A R T S NO. DESCRIPTION A 0 1 - 0 8 1 3 - 0 2 Case A 2 1 - 0 8 1 5 - 1 3 Panel B 4 0 - 0 7 6 5 - 1 4...
  • Page 12 PARTS LIST OF X75-1050-00 DESCRIPTION SCHEMATIC S Y M B O L P A R T S NO. R E S I S T O R R 9 2 - 0 7 3 4 - 0 5 Metal film 5 6 3 . 2 f t ±...
  • Page 13 SCHEMATIC S Y M B O L P A R T S NO. DESCRIPTION R 3 0 3 R 9 2 - 0 7 2 8 - 0 5 ±0.596 1/2W Metal film 31 1.712 R 3 0 4 1/2W R 9 2 - 0 7 3 0 - 0 5 Metal film ±...
  • Page 14 PARTS LIST OF X75-1070-00 DESCRIPTION SCHEMATIC S Y M B O L P A R T S NO. R E S I S T O R R N 1 4 B K 2 H 7 3 R 2 F Metal film 7 3 2 f t ±...
  • Page 15 SCHEMATIC SYMBOL P A R T S NO. DESCRIPTION M I S C E L L A N E O U S J 2 5 - 2 8 2 1 - 0 4 Printed circuit board S201 a, b S01-1 5 0 4 - 0 4 Rotary switch PARTS LIST OF X75-1080-00 SCHEMATIC SYMBOL...
  • Page 16 DESCRIPTION SCHEMATIC S Y M B O L P A R T S NO. R N 1 4 B K 2 H 9 3 1 0 F Metal film 9 3 1 ft 1/2W R1 1 7 ± 1 % Metal film 7 1 5 f t ±...

  • Page 17: P.c. Board

    P.C. BOARD X 7 5 - 1 0 5 0 - 0 0 X 7 5 - 1 0 6 0 - 0 0...
  • Page 18 P.C. BOARD X 7 5 - 1 0 8 0 - 0 0 X 7 5 - 1 0 7 0 - 0 0...

  • Page 19: S C H E M A T I C D I A G R A

    * Specifications and design are subject t o change w i t h o u t notice for improvement. INPUT OUTPUT 6 0 0 I 1 ( ) 60011 J25-2819-04 J 2 5 - 2 8 2 0 - 0 4 J 2 5 - 2 8 2 1 - 0 4 -2822-04 RA-920...
  • Page 20 KENWOOD CORPORATION 2 - 5 , 1-Chome, Shibuya, S h i b u y a - k u , Tokyo 150, Japan © 26410 PRINTED IN J A P A N B50 - 2828 - 20 ( K )

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