Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent English _ 2013-06-17 _ PDF 925 KB 5091-6188E c20140915 [9]

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Keysight Technologies
87300B,C,D and 87301B,C,D,E
Directional Couplers
87310B Hybrid Coupler


                              Technical Overview
Introduction

     The Keysight Technologies, Inc. 87300 series of compact, broadband directional/sampling and hybrid
     couplers are well suited for signal monitoring or, when combined with a coaxial detector, signal level-
     ing. See page 2 for the wide range of product offerings.


     Product Applications
     These compact, broadband directional couplers are important components for many microwave
     measurement systems. Although most modern signal generators and sweepers supply signals whose
     power levels are stable with respect to frequency, variations in signal level are introduced due to the
     cable losses (which increase with frequency) and the frequency response of other components in the
     signal path. Inserting a directional coupler into the system with a suitable microwave detector to sup-
     ply feedback to the ALC circuit of a signal generator or sweeper provides a leveled signal at a particu-
     lar point in the system (Figure 8).

     Keysight 8474B,C,E detectors offer excellent broad-band frequency response and low SWR for this
     application. Other applications include power monitoring with an 848X series power sensor connected
     to the sampling port. Connect the sampled signal port to a microwave counter to monitor frequency
     or to a signal analyzer for frequency spectrum monitoring (Figure 9).

     (See Figures 8 and 9 on page 4.)



     Features and Description
      

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