HIGH PASS FILTER FOR OPTIMUM HF RECEPTION

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glovisol
Posts: 640
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: HIGH PASS FILTER FOR OPTIMUM HF RECEPTION

Postby glovisol » Mon Mar 25, 2019 5:24 pm

HIGH PASS FILTER MEASUREMENTS WITH RSP-SPECTRUM ANALYZER ALPHA VERSION 1.0

Here below Spectrum Analyser plots with new software.

ERRATA CORRIGE: April 12, 2019
The plots below show interference in the low portion of the spectrum. This interference has been caused by parasitic radiation of the switch mode PSU feeding the Noise Generator and in the pictures has been erroneously described as "MW Broadcasting Band interference". This problem has now been corrected by PSU substitution with a low noise, conventional unit and clean plots are shown in the next posts.
Attachments
HP Filter 1.jpg
HP Filter 1.jpg (147.48 KiB) Viewed 1166 times
HP Filter 2.jpg
HP Filter 2.jpg (208.46 KiB) Viewed 1166 times

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glovisol
Posts: 640
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: HIGH PASS FILTER FOR OPTIMUM HF RECEPTION

Postby glovisol » Wed Apr 10, 2019 6:20 pm

HIGH PASS 50 OHM TO 50 OHM FILTER NEW SPECTRUM ANALYSER ATTENUATION SLOPE IMAGES

It takes some time to get used to the new Steve's Spectrum Analyser software, especially working at LF, where interference and noise must be weeded out. Contrary to my first impression, the software works very well at LF & MF. Here are the pics:
Attachments
LF&MF Elim. Filter 3.jpg
LF&MF Elim. Filter 3.jpg (160.82 KiB) Viewed 946 times
LF&MF Elim. Filter 2.jpg
LF&MF Elim. Filter 2.jpg (137.82 KiB) Viewed 946 times

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glovisol
Posts: 640
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: HIGH PASS FILTER FOR OPTIMUM HF RECEPTION

Postby glovisol » Fri Apr 12, 2019 9:10 am

CLEAN PLOTS FOR THE HI Z 560 OHM to 1 KOHM HIGH PASS FILTER

Frequency response plots shown in the previous post were obtained from the 50 to 50 Ohm High Pass Filter. Here below clean plots of the HI Z 560 to 1000 Ohm High Pass Filter are presented together with the measurement setup. These plots have been obtained with the new Steve Andrew's excellent Spectrum Analyser software.
Attachments
High Pass HI Z Filter 1.jpg
High Pass HI Z Filter 1.jpg (146.11 KiB) Viewed 869 times
High Pass Hi Z Filter 2.jpg
High Pass Hi Z Filter 2.jpg (157.49 KiB) Viewed 869 times
High Pass HI Z Filter test April 2019.JPG
High Pass HI Z Filter test April 2019.JPG (261.01 KiB) Viewed 869 times

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