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Summary of Contents for Keysight Technologies 8495D
- Page 1 Keysight 8495D/K Attenuators Operating and Service Manual...
- Page 2 FAR 27.401 or DFAR could result in personal injury or death. 227.7103-5 (c), as applicable in any Do not proceed beyond a WARNING technical data. notice until the indicated conditions are fully understood and met. Keysight 8495D/K Operating and Service Manual...
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Page 3: Regulatory Markings
The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives. Keysight 8495D/K Operating and Service Manual... -
Page 4: Waste Electrical And Electronic Equipment (Weee) Directive
To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – (product-specific information and support, software and documentation updates) – www.keysight.com/find/assist (worldwide contact information for repair and service) Keysight 8495D/K Operating and Service Manual... -
Page 5: Table Of Contents
........29 Keysight 8495D/K Operating and Service Manual... - Page 6 ........32 Keysight 8495D/K Operating and Service Manual...
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Page 7: List Of Figures
..25 Figure 3-1 Operator’s check setup ......31 Keysight 8495D/K Operating and Service Manual... - Page 8 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 8495D/K Operating and Service Manual...
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Page 9: List Of Tables
......23 Table 3-1 Attenuator and SWR settings ....31 Keysight 8495D/K Operating and Service Manual... - Page 10 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 8495D/K Operating and Service Manual...
- Page 11 Keysight 8495D/K Attenuators Operating and Service Manual Introduction Product Overview Specifications This manual contains operating instructions for the 8495D/K Attenuators. Included in the manual is information required to install and test these attenuators.
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Page 12: Introduction
Introduction Product Overview The Keysight 8495D and 8495K are 50- ohm, dc to 26.5 GHz, 0 dB to 70 dB (in 10 dB steps), coaxial attenuators with APC 3.5 connectors. Each attenuator is made up of four attenuation sections connected in cascade. Each section consists of a precision thin- film attenuator card, a lossless thru- line, and a ganged pair of edge line transmission lines. -
Page 13: Figure 1-1 8495K Programmable Four-Section Attenuator Schematic Diagram
20 milliseconds including settling time. Once switched, the solenoid plungers are held in place by permanent magnets and the solenoid plungers automatically disconnect the selected coil drive and connect the opposite coil drive (see Figure 1-1 Figure 1-3). Keysight 8495D/K Operating and Service Manual... -
Page 14: Supplied Accessories
A solenoid drive cable is supplied with the 8495K. The cable is 1.5 m (5 ft) long with a mating connector plug on one end and the other end is unterminated (see Figure 1-2). Solenoid cable connectors Refer also to Figure 1-2 on page 16. Keysight 8495D/K Operating and Service Manual... -
Page 15: Figure 1-2 Solenoid Cable Pin Configuration
[c] Pin 6 is common for all coils. Pins 1, 7, 8, 12, and 14 are not used. (14) Jack, front view Plug, front view Plug, bottom view Figure 1-2 Solenoid cable pin configuration Keysight 8495D/K Operating and Service Manual... -
Page 16: Instrument Options
Typical solenoid relay or switch driver (3 or 4 required) Figure 1-3 Typical solenoid coil driver circuit Instrument options Each instrument is specified with an option number which denotes the configuration of the input and output connectors. Keysight 8495D/K Operating and Service Manual... -
Page 17: Instrument Options
5 V operation instead of standard 24 V 10-pin connector with 10-pin through to 14-pin dip plug, 16-inch DC ribbon cable Viking connector with Viking bare wire cable [a] Option 024 and 060 are default options unless specified otherwise. Keysight 8495D/K Operating and Service Manual... -
Page 18: Specifications
Attenuation accuracy (± dB, referenced from 0 dB) Attenuation dc–6.0 GHz 6.0–12.4 GHz 12.4–18.0 GHz 18.0–26.5 GHz selection (dB) Maximum insertion loss (0.4 + 0.09 f) dB where “f” is the frequency in GHz. Keysight 8495D/K Operating and Service Manual... -
Page 19: Attenuation Repeatability
17 Ω 5 V (4.5 to 7 V) [a] Switching current is current per section. [b] For switching multiple sections simultaneously, the minimum voltage is 5.5 V. Switching speed Maximum 20 milliseconds including settling time. Keysight 8495D/K Operating and Service Manual... -
Page 20: Maximum Swr
Maximum SWR Table 1-7 Maximum SWR Instrument Frequency range (GHz) Maximum SWR DC to 6.0 1.25 6.0 to 12.4 1.45 8495D, 8495K 12.4 to 18.0 18.0 to 26.5 Operating life 5 million cycles per section. Keysight 8495D/K Operating and Service Manual... -
Page 21: Environmental Specifications Physical Dimensions
Operating and Service Manual Environmental Specifications & Physical Dimensions Environmental Specifications Physical Dimensions This chapter contains the environmental tests on the 8495D/K Attenuators that fully comply with Keysight Technologies’ product operating environmental specifications. The physical dimensions are illustrated in the later section. -
Page 22: Environmental Specifications & Physical Dimensions
Environmental Specifications & Physical Dimensions Environmental Specifications The 8495D/K Attenuators are designed to fully comply with Keysight Technologies’ product operating environmental specifications as shown in Table 2-1. Table 2-1 Environmental specifications Characteristic Value Temperature – Operating 0 °C to +55 °C –... -
Page 23: Physical Dimensions
Environmental Specifications & Physical Dimensions Physical Dimensions Table 2-2 shows the physical dimensions of the 8495D/K Attenuators. Table 2-2 Physical dimensions Instrument Weight Dimensions 15 oz 8495D Figure 2-1 425 g 16 oz 8495K Figure 2-2 454 g [a] Dimensions are in millimeters and inches. Dimensions are for general information only. If dimensions are required for building special enclosures, contact your Keysight field engineer. -
Page 24: Figure 2-1 Dimensions Of Keysight 8495D Attenuator
Environmental Specifications & Physical Dimensions Figure 2-1 Dimensions of Keysight 8495D attenuator Keysight 8495D/K Operating and Service Manual... -
Page 25: Figure 2-2 Dimensions Of Keysight 8495K Attenuator
Environmental Specifications & Physical Dimensions Figure 2-2 Dimensions of Keysight 8495K attenuator Keysight 8495D/K Operating and Service Manual... - Page 26 Environmental Specifications & Physical Dimensions THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 8495D/K Operating and Service Manual...
- Page 27 Operating Guides Operating Guides Installation Operating Instructions This chapter describes the installation of the 8495D/K Attenuators. The operating instruction quick- check procedure is included for verification test prior to usage. Keysight 8495D/K Operating and Service Manual...
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Page 28: Operating Guides
Keysight Technologies can provide packaging materials identical to the original materials. Refer to Service and Support information in the front matter of this manual for the Keysight Technologies nearest to you. Attach a tag indicating the type of service required, return address, model number and serial number. -
Page 29: Installation Instructions
(P1) with the jack (J1) on the attenuator, and then pushing the plug over the jack. The plug is removed by grasping the ribbed sides of the plug and squeezing them together while pulling back until the plug clears the jack. Keysight 8495D/K Operating and Service Manual... -
Page 30: Solenoid Drive
The attenuator and detector range switches are stepped together and the variations in level noted. This verifies that each attenuator section is being properly switched and checks the low- frequency accuracy of the attenuator. Keysight 8495D/K Operating and Service Manual... -
Page 31: Figure 3-1 Operator's Check Setup
SWR meter indicates within the limits shown. Table 3-1 Attenuator and SWR settings Attenuation Meter ind ication (dB) SWR meter range (dB) 8495D/K Minimum Actual Maximum Set to 0.5 1.20 1.80 Keysight 8495D/K Operating and Service Manual... - Page 32 [a] Adjust range by 2 dB, if needed, to obtain an on-scale indication. Performance tests The 8495D/K Attenuators can be tested to the accuracy of the specifications with a network analyzer or equivalent equipment of suitable accuracy. If a network analyzer is available, test instrument using the procedure in the analyzer's operating manual.
- Page 33 This information is subject to change without notice. Always refer to the English version at the Keysight website for the latest revision. © Keysight Technologies 2011 - 2019 Edition 5, January 2, 2019 Printed in Malaysia *08495-90027* 08495-90027...
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