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Keysight Technologies
34945A, L4445A, and L4490A/L4491A
Configuration Guide

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Summary of Contents for Keysight Technologies 34945A

  • Page 1 Keysight Technologies 34945A, L4445A, and L4490A/L4491A Configuration Guide...
  • Page 2 – Transfer switching to insert or remove a device in a signal path – Matrix switching of multiple inputs and outputs Keysight Technologies, Inc. is a leader in providing RF/Microwave switching solutions. Keysight’s solutions include both RF/Microwave switch modules and switch driver instruments that control discreet (external) switches and attenuators physically located at the site of the device under test (DUT) or application.
  • Page 3 03 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Step 1 Note that the switches, attenuators, and Table 1, shown on the following page, is Supported Keysight Switches accessories shown in Tables 1 and 2 are a list of commonly used and supported...
  • Page 4 04 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Table 1. Common Keysight RF/Microwave Switches and Attenuators (continued) Reference Coil Position Distribution board Switch Frequency document voltage indicator connector [number of Bracket kit model Description range number option...
  • Page 5 05 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Table 1. Common Keysight RF/Microwave Switches and Attenuators (continued) Reference Coil Position Distribution board Switch Frequency document voltage indicator connector [number of Bracket kit model Description range number option...
  • Page 6 06 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Step 2 Distribution Boards, Bracket Kits, and Cable Kits Switches and attenuators are connected to the Keysight 34945A and L4445A Microwave Switch/Attenuator Drivers and the L4490A/L4491A RF Switch Platform...
  • Page 7 07 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Table 2. Bracket and Cable Kit Usage Kit number Number of switches supported Control cable included Usage Notes L4490A/L4491A Bracket Kits Y1170A L4491A Five brackets per kit. Cable is pre-assembled.
  • Page 8 08 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Step 3 Switch/attenuator driver offers a 6.5 digit DMM, and supports a Typical connections of these system host of switching and control modules. components are shown in Figure 2.
  • Page 9 3 0 V D C M A X I/ O A C C E S S slave) Ext power 24V/12V/5V Up to eight 34945EXT modules including the master per 34945A or L4445A Figure 2. 34945A and L4445A external connections www.keysight.com/find/34980a...
  • Page 10 10 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide hub/switch * = standard LAN cables LAN cross-over cables for direct PC – L4490A/L4491A connection if PC is non Auto-MDIX Cable p/n 5061-0701 Keysight L4491A +24 V supplied from L4491A...
  • Page 11: System Diagnostics

    11 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide System Interconnections Numbering schemes Each 34945A or L4445A configuration must contain at least one 34945EXT Defined The channel numbers associated with module (a “master”) with limits on the each bank on the 34945EXT are shown in...
  • Page 12 12 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide L4490A and L4491A RF switch platform product options There are five product options available for the L4491A and one option available for the L4490A. All options are factory installed and must be specified at the time of order.
  • Page 13: Internal/External Power Supply Considerations

    13 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Internal/External Power The quiescent current requirement of the 34945EXTs themselves is accounted for Supply Considerations by the internal supply rating and is not included in quiescent current and switching As shown in Figures 2 and 3, the channel current calculations.
  • Page 14: External Supply

    14 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide External supply Remember that the external supply must also meet the quiescent and switching Each 34945EXT module is limited to 2 A current requirements of the switch. Using continuous current from an externally the Keysight 87104/87106A, B, C coaxial connected power supply (4.75 V to 30 V).
  • Page 15: Data Sheets

    15 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Related Keysight Literature Data sheets Application notes For additional information please visit: Keysight 34980A Multifunction Switch/ Test System Signal Switching http://www.keysight.com/find/34980A Measure Unit 5988-8627EN 5989-1437EN http://cp.literature.keysight.com/litweb/ http://www.keysight.com/find/L4445A http://cp.literature.keysight.com/litweb/ pdf/5988-8627EN.pdf http://www.keysight.com/find/L449xA...
  • Page 16 16 | Keysight | 34945A, L4445A, and L4490A/L4491A - Configuration Guide Evolving Since 1939 For more information on Keysight Technologies’ products, applications or Our unique combination of hardware, software, services, and people can help you services, please contact your local Keysight reach your next breakthrough.

This manual is also suitable for:

L4445aL4490aL4491a

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