RSP1A Bias -T
RSP1A Bias -T
Is there a point on the RSP1A PCB that I can pick up the switched 5v that feeds the Bias-T and is there a component that I can remove to prevent the 5V being fed up the coax?
I want to experiment with using the Bias-T function to switch some outboard modules without having to tap it from the antenna connector.
I want to experiment with using the Bias-T function to switch some outboard modules without having to tap it from the antenna connector.
Last edited by mattltm on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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Re: RSP1A Bias -T
I haven't looked at the schematic, but typically a voltage is added to an RF line through an RF Choke/inductor. Remove that, and tap into the non-RF side. Good luck.
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Re: RSP1A Bias -T
IS the schematic publicly available? I've had a quick Google search but can't find anything.
Last edited by mattltm on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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Re: RSP1A Bias -T
Yes, there is a component you can remove - its an inductor on the pcb near the antenna plug. You remove it on your own risk. Your warranty will be void.
You can also use an external DC-block, a capacitor in series (depending on your lowest frequency 100nF-470nF, ceramic).
Imho there is no circuit drawing of RSP1A available but you can find pictures of the pcb.
Wolfgang
You can also use an external DC-block, a capacitor in series (depending on your lowest frequency 100nF-470nF, ceramic).
Imho there is no circuit drawing of RSP1A available but you can find pictures of the pcb.
Wolfgang
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SDRplay (RSP1, RSP1A, RSP2pro) with:
RFsystems DX-10 (14kHz to 50MHz), resistive splitter 1/4, 1:16 transformer on Hi-Z of RSP2
ICOM Discone AH-8000 (10MHz to 2GHz)
12m above ground
RFsystems DX-10 (14kHz to 50MHz), resistive splitter 1/4, 1:16 transformer on Hi-Z of RSP2
ICOM Discone AH-8000 (10MHz to 2GHz)
12m above ground
Re: RSP1A Bias -T
IQbert, I would love to reply to your PM but can't because I am not allowed to send any messages yet!
Please PM me your email address and I will send you what you need.
Thanks.
Please PM me your email address and I will send you what you need.
Thanks.
Last edited by mattltm on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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