[SOLVED] How to connect DC supply to Bias Tee

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critac

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I am a beginner at RF and electronics, but I have a Mini-Circuits ZFBT-4R2G-FT+ 10-4200MHz Bias Tee. It has a sigle DC Feedthrough pin to connect the DC supply. I cannot figure out how to attach my DC supply as it should have atleast 2 connectors to connect my live and neutral to it. The attached image contains my bias tee. So as the title states, how do I connect my power supply to it?


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The feedthough pin has this text on the bottom:


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Solution
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The SMA connector (RF & DC) goes to your transistor, to bias the gate/base OR the drain/collector.
The (-) of your power supply goes to the GND and the (+) goes to the DC.
If you want to bias simultaneus the gate/base AND drain/collector, you need another Bias-Tee.
Some transistors (GaAs FET or GaN) needs negative bias voltage on their gates.
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The SMA connector (RF & DC) goes to your transistor, to bias the gate/base OR the drain/collector.
The (-) of your power supply goes to the GND and the (+) goes to the DC.
If you want to bias simultaneus the gate/base AND drain/collector, you need another Bias-Tee.
Some transistors (GaAs FET or GaN) needs negative bias voltage on their gates.
 

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    critac

    Points: 2
    Thanks a lot! I am using this bias tee to power a LNB to repurpose a TV Dish, I dont know what transistor my LNA uses and I cant find a datasheet for it. I'll try looking at it more closely. I also realised that the DC return is form coax shielding and hence why i need to connect to Ground. Thank you for your answer!!
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Solution
The "chassis ground" solder post on the left is your DC bias supply return and the insulated feed through on the right is the supply voltage.
 
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    critac

    Points: 1
    Thank you, I realised that the shielding on coax is the returnpath for DC.
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