The Johansson 4512 is a TAP-type coaxial distribution component with 1 input and 1 tap output. At 20 dB insertion loss and 25 dB port isolation, it is designed for use further along a distribution cascade, where the main signal level is still adequate to support a deeper tap.

DC pass capability allows supply voltage to travel through the coaxial cable, enabling active antenna components — such as masthead amplifiers or LNBs — to receive power without a separate feed line.

Key Features

• TAP configuration: 1 input, 1 output
• Frequency range: 5–2300 MHz, covering terrestrial, satellite, and DOCSIS bands
• DC pass on the input port
• Insertion loss: 20 dB
• Isolation between output ports: 25 dB
• Return loss on input and output: 10 dB

Product Benefits

• 20 dB tap level matches late-stage cascade positions where signal levels have been reduced by prior splitters
• 25 dB isolation provides stronger separation between the tapped drop and the through path compared to lower-loss models
• Wide 5–2300 MHz bandwidth handles terrestrial, satellite, and broadband frequencies without additional components
• DC pass supports in-line powering of active antenna system elements

Technical Specifications

• Model: Johansson 4512
• Type: TAP splitter
• Inputs: 1
• Outputs: 1
• Frequency Range: 5–2300 MHz
• Insertion Loss: 20 dB
• Isolation: 25 dB
• Return Loss (in/out): 10 dB
• DC Pass: Yes

Why You'll Love It

• The 20 dB tap value fills the gap in a graduated cascade between the 15 dB and 25 dB models in the Johansson 451x series
• Higher 25 dB isolation compared to earlier models reduces crosstalk at the tap port
• Single-output design means no wasted ports in a single-subscriber application
• Consistent with the rest of the Johansson 451x series, simplifying mixed-tap installations in the same enclosure