Coupling strategy test HF CENELEC B in a AC line

Useful information regarding antennas for SDR products.
eduardocardona
Posts: 1
Joined: Wed Dec 05, 2018 6:53 pm

Coupling strategy test HF CENELEC B in a AC line

Postby eduardocardona » Wed Dec 05, 2018 7:00 pm

Hi,
What would be the strategy to couple the High Impedance port of the SRDDuo to test CENELEC B (25 - 95 Khz) Data over single pole AC (125 V) circuit

I though of a resistor division of 10MOhm and 1MOhm to ground and then place a second divisor of 1KOhm 100 Ohm at the 1MOhm resistor connected to P and N-G to ground - I still believe is too high, but first looking for others

Thanks
E
Last edited by eduardocardona on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason

sdrom33
Posts: 1
Joined: Sun Dec 09, 2018 4:38 pm

Re: Coupling strategy test HF CENELEC B in a AC line

Postby sdrom33 » Sun Dec 09, 2018 6:50 pm

Do not take chances with unbalanced connections to the AC line. Use a small step/down transformer
PRIMARY: 125 V
Secondary: 5v

Use one decoupling capacitor on each lead of the secondary, then a balanced H resistive 30/60 dB attenuator to the balanced input of the RSP. If signal still too strong, increase attenuation as needed
Last edited by sdrom33 on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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