Anonymous Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Keysight 44478B
Keysight/Agilent 44478B, Dual 1x4, RF, Broadband, Multiplexer Module
Actual item may vary if no part number is provided on quote request.
✔ 2 Year Warranty Included
✔ Free Domestic Ground Shipping
✔ NIST Calibration Available
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Carol Zimme**** Verified Buyer
" Very responsive and helpful, competitive pricing. Good source! "
July 2025
Andrew Gar**** Verified Buyer
" Amazing to work with and had my order within 1 week after purchasing with all NI certs and data that were needed. "
March 2025
Said Sai**** Verified Buyer
" Competent contact for highly specialized components. The support team is very knowledgeable. Many thanks for the help and the fast shipping! "
January 2025
Bob C**** Verified Buyer
" Jason was able to get our emergency situation taken care of quickly and professionally. "
May 2025
Gregg Flecki**** Verified Buyer
" Great service and great products. This is my 2nd time using Apex Waves, truly impressed. "
January 2025
Keysight 44478B Dual 1x4 RF Multiplexer Module
The 44478B from Keysight is a radio frequency multiplexer module with a dual 1x4 configuration. This 75-ohm, 1.3 GHz switching unit supports broadband signal routing that is widely used in automated microwave measurement units. It offers two 1x4 signal paths for RF switching. This RF unit can be used for fast pulses and operates with DC-1.3 GHz signals and consumes a current rating up to 1 A per channel. It operates with a power supply of 24 W or 24 VA for maximum switch capacity. The 44478B is used to offer bidirectional signals with 2 multiplexer sections. It can forward signals in the opposite direction if needed for the test. Each 1-to-4 section uses seven relays arranged in a tree structure. This layout helps maintain strong isolation between inactive signal paths. It also supports a low voltage standing wave ratio (VSWR) across the operating frequency range.
The multiplexer module provides insertion loss that is found below 1.9 dB at 1.3 GHz. This controlled loss helps preserve signal level during broadband switching. It also aids in delivering channel isolation above 55 dB at 1 GHz that helps to reduce leakage during dynamic-range measurements. The RF module works with spectrum analyzers and network analyzers. It also suits distortion analyzer setups that require separated paths. The device supports multi-channel signal distribution in automated test racks. It can route signals between antennas and components during repeatable measurements.
Keysight 44478B Dual 1x4 RF Multiplexer Module
The Keysight 44478B is a radio frequency multiplexer module with a dual 1x4 configuration. This 75-ohm 1.3 GHz switching unit supports broadband signal routing that is widely used in automated microwave measurement units. It offers two 1x4 signal paths for RF switching. This RF unit can be used for fast pulses and operates with DC-1.3 GHz signals and consumes a current rating up to 1 A per channel. It operates with a power supply of 24 W or 24 VA for maximum switch capacity. The 44478B is used to offer bidirectional signals with 2 multiplexer sections. It can forward signals in the opposite direction if needed for the test. Each 1-to-4 section uses seven relays arranged in a tree structure. This layout helps maintain strong isolation between inactive signal paths. It also supports a low-voltage standing wave ratio (VSWR) across the operating frequency range.
The multiplexer module provides insertion loss that is found below 1.9 dB at 1.3 GHz. This controlled loss helps preserve signal level during broadband switching. It also aids in delivering channel isolation above 55 dB at 1 GHz that helps to reduce leakage during dynamic-range measurements. The RF module works with spectrum analyzers and network analyzers. It also suits distortion analyzer setups that require separated paths. The device supports multi-channel signal distribution in automated test racks. It can route signals between antennas and components during repeatable measurements.
The unit has a maximum scan rate of 43 channels per second. This speed supports automated sequencing across multiple RF paths. It is suitable for systems that require regular channel changes during testing. The Keysight 44478B multiplexer is capable of handling up to 44 dBm of radio frequency power per channel. It has a DC plus AC peak voltage of 42 V. The RF cables can be directly connected through the female type BNC edge connectors. Resistor termination can be provided on the unused channels to help maintain DUT operation during switching. A 50-ohm or 75-ohm SMB termination fits in the provided male-type SMB connector for every channel.
has a maximum scan rate of 43 channels per second. This speed supports automated sequencing across multiple RF paths. It is suitable for systems that require regular channel changes during testing. The Keysight 44478B multiplexer is capable of handling up to 44 dBm of radio frequency power per channel. It has a DC plus AC peak voltage of 42 V. The RF cables can be directly connected through the female type BNC edge connectors. Resistor termination can be provided on the unused channels to help maintain DUT operation during switching. A 50-ohm or 75-ohm SMB termination fits in the provided male-type SMB connector for every channel.
| Model | Keysight 44478B |
|---|---|
| Manufacturer | Keysight |
| Part Type | Dual 1x4 RF Multiplexer Module |
| Multiplexer Configuration | Dual 1-to-4 |
| Maximum Current | 1 A |
| Frequency Range | DC to 1.3 GHz |
| Characteristic Impedance | 75 Ohms |
| Maximum Switching Power | 24 W or 24 VA |
| RF Power Rating | 44 dBm per channel |
| Connector Type | Female BNC connectors |
Associated part numbers for Keysight 44478B:
Delivery:
Eligible returns may be accepted within 30 days at Apex Waves’ discretion. A 25% restocking fee applies; non-refundable and built-to-order products are excluded.
Payment:
Receive Price & Availability Today!
Ask About Our Tiered Calibration Levels
Option & Modules:
Confirm Your Requirements or Versions
Cost & Lead Time Available Upon Request for Service
Repair Evaluation: $150
Common Typos:
Why Buy From Apex Waves:
