Keysight L7222C Operating And Service Manual
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Keysight L7222C Operating And Service Manual

Coaxial transfer switch
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Keysight L7222C
Coaxial Transfer Switch
Operating
and Service
Manual

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Summary of Contents for Keysight L7222C

  • Page 1 Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 4: Notices

    © Keysight Technologies 2007, 2014 this document or of any information con- Technologies’ standard commercial license tained herein. Should Keysight and the user terms, and non-DOD Departments and No part of this manual may be reproduced in have a separate written agreement with Agencies of the U.S.

  • Page 5: Weee Compliance

    To return unwanted products, contact your local Keysight office, or www.keysight.com for more information. Printing Copies of Documentation from the Web To print copies of documentation from the Web, download the PDF file from the Keysight web site: Go to http://www.keysight.com. •...

  • Page 6: Contacting Keysight (Americas, Asia Pacific & Japan)

    Contacting Keysight (Americas, Asia Pacific & Japan) Contacting Keysight (Americas, Asia Pacific & Japan) Online assistance: www.keysight.com/find/assist Americas Brazil Canada Mexico United States (tel) (+55) 11 3351 7012 (tel) +1 877 894 4414 (tel) 1 800 254 2440 (tel) 800 829 4444...

  • Page 7: Contacting Keysight (Europe)

    (tel) (+44) (0)7004 666666 (fax) (+41) (0)22 567 5314 (fax) (+44) (0)7004 444555 (tel) = primary telephone number; (alt) = alternate telephone number; (fax) = FAX number; * = in country number 5/6/05 Keysight L7222 Coaxial Transfer Switch Operating and Service Manual...

  • Page 8: Table Of Contents

    Contacting Keysight (Americas, Asia Pacific & Japan)....iv Contacting Keysight (Europe) ........v .

  • Page 9: General Information

    General Information General Information Keysight L7222C coaxial transfer switch is designed for flexibility in L-Series Coaxial Transfer Switch signal routing applications and provides exceptional insertion loss repeatability of 0.03 dB, low insertion loss and high isolation > 80 dB. Overview...
  • Page 10 General Information The L7222C can be used in a variety of applications such as switching two inputs and two outputs, signal reversal switching or as a drop-out switch. Innovative design and careful process control mean the L7222C meet the requirements for highly repeatable switching elements in test instruments and switching interfaces.

  • Page 11: Driving The Switch

    General Information Driving the Switch There are two positions for the L7222C coaxial transfer switch. See Figure 3. Position A has RF Port 1 connected to RF Port 2 and RF Port 3 connected to RF Port 4. Position B has RF Port 2 connected to RF Port 3 and RF Port 1 connected to RF Port 4.

  • Page 12: Standard Drive

    For TTL drive, pin 9 must be grounded. In addition to the quiescent current supplying the electronic position-sensing circuitry, the drive current flows out of pin 9 (during switching) when using TTL drive. Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 13: Dual Line Ttl Drive

    Select position B by applying TTL “Low” to pin 7 and TTL “High” to pin 8. NOTE After the RF path is switched and latched, the drive current is interrupted by the electronic position-sensing circuitry. Pulsed control is not necessary, but Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...
  • Page 14 General Information if implemented, the pulse width must be 15 ms minimum to ensure that the switch is fully latched. Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 15: Electronic Position Indicator

    If pin 9 is not grounded, the position indicators will function while the appropriate drive has ground applied. Pin number Function Common Position “A” Position “B’ Figure 4 Pin Function Diagram for Indicator Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 16: Specifications

    Typical characteristics are included for additional information only and they are not specifications. These are denoted as "typical", "nominal" or “approximate" and are printed in italics. Table 4 General Specifications for L7222C Coaxial Transfer Switch Keysight Model Number L7222C Maximum power rating...
  • Page 17 Specifications Table 6 RF Specifications for L7222C Coaxial Transfer Switch Keysight Model Number L7222C Frequency Range DC to 26.5 GHz Insertion Loss 0.2 dB + 0.025 x Freq (GHz) Isolation 110 dB - 2.0 x Freq (GHz) < 1.1 (DC to 2 GHz) <...
  • Page 18 Supply Voltage, Vcc Supply Current, Icc Supply Current (quiescent) 1. Switching: Pulse width > 15 ms: Vcc = 24 VDC Table 8 TTL Drive Specifications for L7222C Coaxial Transfer Switch (Option T24) Nominal Unit High level input Low level input Max high input current 1.
  • Page 19 Specifications Figure 5 Maximum Incident Power (Cold Switching) vs. Frequency Power derating factor versus VSWR VSWR (:1) Figure 6 Power Derating Factor vs VSWR Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 20: Environmental Specifications

    Environmental Specifications Environmental Specifications The L-series multiport coaxial switches are designed to fully comply with Keysight Technologies’ product operating environmental specifications as shown in Table Table 9 L7222C Coaxial Transfer Switch Environmental Specifications Temperature: Operating C to +75 Storage C to +85...

  • Page 21: Physical Specifications

    Physical Specifications Physical Specifications The physical specifications of L7222C coaxial transfer switch is illustrated Table Table 10 L7222C Coaxial Transfer Switch Physical Specifications Dimensions Figure 7 Net weight, kg (lb) 0.1 (0.23) Standard 55.20 (2.173) 4.85 3.36 (.191) (.143) 2.54 5.66...

  • Page 22: Installation

    2. If the contents are incomplete, if there is mechanical damage or defect, or if the instrument does not pass the electrical performance test, contact the nearest Keysight Technologies Sales and Service office. Refer to the Service and Support information in the front matter of this manual.

  • Page 23: Operating Instruction

    The s-parameters measurement is the best way to determine if the switch is working properly. Figure 8 Connection to Perform Quick Check Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...
  • Page 24 6. Now, still in position B, disconnect switch’s Port 1 and Port 2 from network analyzer. Then, connect network analyzer’s Port 1 and Port 2 to Port 2 and Port 3 of the switch. Measure S and S and verify against specifications in Table Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...

  • Page 25: Performance Tests

    The coaxial transfer switch do not have internal adjustments and should not be opened. Repair The L7222C coaxial transfer switch is not recommended for repair as most components are not easily removed. Maintenance The connectors, particularly the connector faces, must be kept clean. For instruction on connecting and care of your connectors, refer to the Microwave Connector Care Quick Reference Card (08510-90360).
  • Page 26 Service Instructions Keysight L7222C Coaxial Transfer Switch Operating and Service Manual...
  • Page 27 This information is subject to change without notice. © Keysight Technologies 2007, 2014 Edition 2, August 2014 *L7222-90001* L7222-90001 www.keysight.com...

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