Bedienungsanleitung HP (Hewlett-Packard) Hewlett-PackardHP 8663A

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HP 8663A
SYNTHESIZED SIGNAL GENERATOR
(Including Options 001, 002, & 003)
Service Manual
SERIAL NUMi3ERS
This manual applies directly to irxtrumenti with
m-ial numbers prehed:
2234A to 2927A and all MAJOR changes that apply to your instrument,
m~.Ol JUL91
For additional im~rtant information about trial
numbers, refer to TNS’THJMIENTS COVERED BY
THE MANUAL* in Section I.<
!l’hird Edition
This material may be reproduced by or for the U.S.
Government pur6uant to the Copyright

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COPYRIGHT AND DISCLAIMER NOTICE Copyright - Agilent Technologies, Inc. Reproduced with the permission of Agilent Technologies Inc. Agilent Technologies, Inc. makes no warranty of any kind with regard to this material including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies, Inc. is not liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use

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Model 8663A Volume 3 Conbmts VOLUME 3 CONTENTS Schematic ~hfmny/Trouble- PMtS swvice Mock Assembly or Section ShootlnQ List Sheet Diagram Page Page Number Number Number SSi3 SD3 A5A4 Fractional N Loop Referemx Divider s-401 6-109 SF.14 SD4 A5A3 Fractional N Loop Phase Detector 8-407 6-103 SW5 BD4 A5A5 Fractional N Loop VCO 0-417 6-111 SSl6 BW A5A2 Fractional N Loop N Divider 6-425 6-101 BD4 s.517 A5Al Fractional N Loop Accumulator 6-433 6-99 SSl8 SD6 A3A3 N Loop Dlvlder/Phase

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Service Model 0663A SERVICE SHEET 13 A5A4 FRACTIONAL-N LOOP REFERENCE BLOCK DIAGRAM 4 Table 4-l. Recommended Performance Tests After Adjustments or Repaks Table 5-2.. Post-Repair Adjustment Procedures PRINCIPLES OF OPERATION General The Reference Divider divides the 10 MHz reference signal down to 100 kHz which is used as the reference signal to the phaxe detector. This assembly also generates the sample pulse signal that clocks the sample-hold circuit at the propep time. Shaper T

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-- Figure 8.513, Al2A2 UHF Modulator Block Diagrams

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Model 8663A Service 1 10 Figure 8-402 A5A4Fractimal-N Loop Reference Diuider Component Locator 8-404

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PI0 A5A6 FRACTIONAL-N LOOI L-- -- -- -- sLQt4L PREF,X 2*3‘%A

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N !

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, /O A5A6 --- I lr

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SERVICE SHEET A5A4 13 Figure 8-403. A&M l+actiona~-N hop Refmnce Divider Schematic S-405/406

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Model 8663A Service SERVICE SHEET 14 A5A3 FRACTIONAL-N LOOP PHASE DETECTOR REFERENCE BLOCK DIAGRAM 4 Table 4-l. Recommended I’erfoymance Tests After Adjustments or Repairs Table 5-2. Post-Repair Adjustment Procedures PRINCIPLES OF OPERATION General The purpose of the Fractional-N Loop Phase Detector (A5A3) is to dwelwp the FN Loop Error Voltage which is used to tune the VCO. This FN Loop Error Voltage (tuning voltage) is developed by integrating currents from the Phase Detector cir

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