Response curves of Bandpass filters.

General discussion and support for the Peaberry SDR V2.

Response curves of Bandpass filters.

Postby VE3LC » Fri Dec 13, 2013 2:27 am

I have a Rigol DSA 815 Spectrum Analyser/Tracking Generator I purchased at Dayton last May.

I was curious with the toroid winding information just what the response curves of the two band pass filters looked like, so I removed C27 and the hot lead output lead of T5 and connected the instrument to the ins and outs of the filters switch the relay by running HDSDR. The V2 was built up for 60-40-30 and 20 mtrs.

The results show a flat response on both filters. The low bandpass filter shows a flat top response with .80 dB insertion loss between 4.7 to 7.6 MHz. The high bandpass filter shows a flat top response with a 1.16 dB between 9.1 to 15.17 MHz.

Not bad in my opinion.

73 Norm, VE3LC
Ottawa, Canada

Here are the traces:
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VE3LC
 
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