Keysight / Agilent 44478A Dual 1X4 RF Multiplexer Module

Keysight / Agilent 44478A Dual 1X4 RF Multiplexer Module

50 Ω

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CE labeled RoHS Compliant
We typically stock RoHS compliant / CE marked equipment for this Keysight / Agilent 44478A.
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Stock # 62549-2
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Keysight / Agilent 44478A / 44478B Dual 1X4 RF Multiplexer Module

  • Switching up to 1A, 24W or 24VA
  • Insertion Loss Less Than 1.9dB at 1.3GHz
  • Maximum Scan Rate: 43 Channels/sec
  • Maximum Voltage: 42V, DC+AC peak


The Agilent 44478A / 44478B Multiplexer Module is an ideal choice for broadband switching of high frequency or fast pulse signals. Dual 1-to-4 multiplexers provide bi-directional switching of signals from DC to 1.3GHz. High channel isolation (>55 dB at 1 GHz) assures quality dynamic-range measurements using spectrum, network, or distortion analyzers. Each 1-to-4 multiplexer consists of seven relays in a "tree" structure, which provides high isolation and low VSWR (voltage standing wave ratio). All the connectors on the module's edge are female BNC for ease of wiring. Off-channels can be terminated in resistors to maintain proper operation of DUT circuitry. Simply plug a 50/75 Ohm SMB type resistive termination onto the on-board male SMB connector provided for each channel.

Product Family: 44478A, 44478B

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Input Characteristics
Maximum Scan Rate 43 channels/sec
Maximum Voltage 42 V, DC + AC peak
Maximum Current1 A
Maximum Power(Per channel) 24 W, 24 VA or 44 dBm
Characteristic Impedance44478A: 50 Ω
44478B: 75 Ω
DC Performance
Thermal Offset <6 µV (<2 µV, Typ.)
Initial Closed Channel Resistance<1 Ω
Insulation Resistance (between terminals)<(25°C, 40% RH) >1010 Ω
Center-Center <0.006 pF
Center-Shield <60 pF
Rise Time <300 psec
Signal Delay <3 nsec

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Item Images

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Agilent / HP 44478A / 44478B Dual 1X4 RF Multiplexer ModuleAgilent / HP 44478A / 44478B Dual 1X4 RF Multiplexer Module

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Manuals, Datasheets, Drivers, Links

HP/Agilent 44478A / 44478B Datasheet (pdf) 
Link to Keysight / Agilent Website 

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