HP 492A Manuals

Table of Contents

• 4

  Table of Contents
• 6

  Description
• 6

  General Information
• 7

  Instrument Identification
• 7

  Traveling Wave Tube Warranty
• 8

  Installation
• 8

  Mechanical Inspection
• 8

  Power Cable
• 8

  Power Requirements
• 8

  Repackaging for Shipment
• 10

  Bandwidth Considerations
• 10

  Helix Control
• 10

  Introduction
• 10

  Operating Instructions
• 10

  Preliminary Operating Procedure
• 10

  Saturation Power Output
• 12

  Amplitude Modulation
• 12

  Buffer Amplifications
• 12

  Constant Gain or Constant Output
  • 12

    Amplification
• 15

  Limited Phase Modulation
• 15

  Pulse Modulation
• 15

  Unlimited Phase Modulation and Frequency Shifting
• 16

  Homodyne Detection
• 18

  Frequency Modulation
• 20

  Principles of Operation
  • 20

    Introduction
  • 20

    Regulated Power Supply
  • 20

    Traveling Wave Tube
  • 23

    Grid Modulation
  • 23

    Helix Modulation
  • 24

    Constant-Amplitude, Linear Sawtooth Generator
  • 26

    Maintenance
  • 26

    Introduction
  • 26

    Cleaning the Air Filter
  • 26

    Test Equipment
  • 28

    Repair
  • 28

    Cabinet Removal
  • 28

    Tube Replacement
  • 28

    Traveling Wave Tube Capsule
    • 28

      Replacement
  • 30

    Adjustments
  • 30

    Excessive Helix Current
    • 30

      Chassis Helix Control
  • 30

    Anode Voltage Control
  • 30

    Regulated Power Supply
  • 31

    Troubleshooting
  • 32

    Performance Checks
  • 32

    Output Power Check
  • 32

    Noise Figure Check
• 35

  Replaceable Parts
  • 35

    Introduction
  • 35

    Ordering Information