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Summary of Contents for Keysight 778D
- Page 1 Keysight 778D Dual Directional Coupler Operating and Service Manual...
- Page 2 Declarations of Conformity for this product ceed beyond a CAUTION notice until the indi- the DFARS and are set forth specifically in and for other Keysight products may be down- cated conditions are fully understood and met. writing elsewhere in the EULA. Keysight shall loaded from the Web.
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Page 3: Safety Symbols
Caution, risk of danger (refer to this manual for Caution, risk of electric shock specific Warning or Caution information) Caution, laser radiation Alternating current (AC) On (mains supply) Off or Standby (mains supply) Earth (ground) terminal Keysight 778D Operating and Service Manual... -
Page 4: Safety Considerations
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the product. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements. -
Page 5: Regulatory Markings
Cet appareil ISM est conforme a la norme domestic household waste. NMB-001 du Canada. ISM GRP.1 Class A indicates that this is an Industrial Scientific and Medical Group 1 Class A product. Keysight 778D Operating and Service Manual... -
Page 6: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/Ec
To return this unwanted instrument, contact your nearest Keysight Service Center, or visit http:// about.keysight.com/en/companyinfo/environment/takeback.shtml for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/mta (product-specific information and support, software and documentation updates) –... -
Page 7: Table Of Contents
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- Page 13 Keysight 778D Dual Directional Coupler Operating and Service Manual Overview Description This chapter provides an overview of the 778D dual directional coupler.
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Page 14: Overview
This coupler may be used in the measurement of reflection coefficients or SWR over a very wide frequency range. The relatively constant coupling across several frequency bands and the stability of coupling with time make the 778D useful, also, as a wideband attenuator or for power monitoring applications. - Page 15 Keysight 778D Dual Directional Coupler Operating and Service Manual Specifications Specifications This chapter provides the specifications of the 778D dual directional coupler.
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Page 16: Specifications
Specifications Specifications Specifications for the 778D are shown in the following table. Table 2-1 Specifications Characteristic Value Frequency range 100 to 2000 MHz (usable below 100 MHz) Directivity See figure on page 14 Auxiliary arm 0.1 to 1.0 GHz A 36 dB B 30 dB Auxiliary arm 1.0 to 2.0 GHz... -
Page 17: Swept-Frequency Directivity
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - P aux ) when Pmain flows reversed where P = Power aux = auxiliary arm main = main arm The power input to the main arm is the same for both measurements. NOTE Keysight 778D Operating and Service Manual... - Page 18 Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 778D Operating and Service Manual...
- Page 19 Keysight 778D Dual Directional Coupler Operating and Service Manual Installation and Shipping Unpacking and Inspection Repackaging for Shipment Load-Bearing This chapter provides the information on how to check, install, and return the 778D dual directional coupler to Keysight Technologies.
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Page 20: Installation And Shipping
The coupler was carefully inspected mechanically and electrically prior to shipment. If there is damage or deficiency, notify the carrier and the nearest Keysight Technologies office. In the event of mechanical damage, the packing materials and carton should be held for the carrier’s inspection. -
Page 21: Repackaging For Shipment
The following general instructions should be used when repackaging with commercially available materials: 1 Wrap the coupler in heavy paper or plastic. (If shipping to a Keysight Technologies office or service center, attach a tag indicating the type of service required, return address, and model number.) -
Page 22: Load-Bearing
When installing be sure auxiliary equipment supports its own weight. The coupler, particularly the connectors, is not designed to carry weight. Load limits for APC-7 connectors are given in Figure 3-2. Figure 3-2 Load limits for APC-7 connector Keysight 778D Operating and Service Manual... - Page 23 Keysight 778D Dual Directional Coupler Operating and Service Manual Operation Signal Flow Coupler Temperature Power Leveling Maintenance This chapter provides the information to operate the 778D dual directional coupler.
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Page 24: Operation
Figure 4-1 Signal flow Coupler Temperature Operate the coupler at normal room temperature and do not temperature cycle the coupler in use or storage. Heat cycling may degrade the performance of the coupler. Keysight 778D Operating and Service Manual... -
Page 25: Power Leveling
Operation Power Leveling The 778D has cyclic coupling variations of up to ±2 dB. For this reason it is not recommended for power leveling that requires flatness exceeding these tolerances. A typical coupling curve is shown Figure 2-1 page Maintenance The directional coupler should need very little maintenance besides keeping it clean and protecting the connector faces. - Page 26 Operation THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 778D Operating and Service Manual...
- Page 27 This information is subject to change without notice. Always refer to the English version at the Keysight website for the latest revision. © Keysight Technologies 2000 - 2017 Edition 4, July 6, 2017 Printed in Malaysia *00778-90013* 00778-90013 www.keysight.com...