I'm designing a cheap GMRS base station setup using a Baofeng GMRS-9R, a laptop with an SDR and SDR#, a Y-cable, and an antenna tuned for GMRS frequencies. I have these things already and figured I would play around with this while saving up for a real 50W base station radio. (Probably the Wouxun KG1000G)
My question is, would an inline DC blocker (normally used to block dc voltage from a bias-t) block the TX voltage from an HT and protect the SDR in this design? Or, is the TX voltage AC and the DC blocker would be rendered ineffective or damage both it and the SDR?
I have not found anything equivalent for AC blockers either so my assumption is a DC blocker would be the way to do this. I know that duplexers accomplish this but they are frequency based and my intent is to transmit and receive on the HT and receive on the SDR to watch the GMRS spectrum for potential traffic as well as signal strength analysis. Would the SDR just be overloaded from the transmission regardless?
You can post now and register later.
If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.
Question
WRVS497
I'm designing a cheap GMRS base station setup using a Baofeng GMRS-9R, a laptop with an SDR and SDR#, a Y-cable, and an antenna tuned for GMRS frequencies. I have these things already and figured I would play around with this while saving up for a real 50W base station radio. (Probably the Wouxun KG1000G)
My question is, would an inline DC blocker (normally used to block dc voltage from a bias-t) block the TX voltage from an HT and protect the SDR in this design? Or, is the TX voltage AC and the DC blocker would be rendered ineffective or damage both it and the SDR?
The DC blockers I have are cheapos from Amazon https://www.amazon.com/dp/B07P1KPQCX?ref=nb_sb_ss_w_as-reorder-t1_k7_1_10&=&crid=3R9W9HMRI3RAW&sprefix=dc%2Bblocker&th=1
I have not found anything equivalent for AC blockers either so my assumption is a DC blocker would be the way to do this. I know that duplexers accomplish this but they are frequency based and my intent is to transmit and receive on the HT and receive on the SDR to watch the GMRS spectrum for potential traffic as well as signal strength analysis. Would the SDR just be overloaded from the transmission regardless?
Link to comment
Share on other sites
4 answers to this question
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.