FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

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

FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

Post by glovisol » Wed Mar 27, 2019 3:35 pm

The new software is a major advance and makes possible measurements previously possible with very expensive spectrum analysers.

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glovisol
Posts: 662
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

Post by glovisol » Wed Mar 27, 2019 3:56 pm

THREE SECTION/TWO STUB COAXIAL LINE BANDSTOP FILTER FOR FM BROADCAST BAND SUPPRESSION

By cutting three cheap TV type coaxial cables to 1/4 wavelength at 98 MHz and hooking them together with two coupling capacitors you can build and test a bandstop filter prototype in one morning's work, thanks to the new Steve Andrew's Spectrum Analyser and to a cheap BG7TBL Noise Generator. This would have been impossible before because of the severe bandwith limitation of the previous Ver. 0.9.
Attachments
BSTOP 1.jpg
BSTOP 1.jpg (172.08 KiB) Viewed 2312 times
BStop 2.jpg
BStop 2.jpg (167.8 KiB) Viewed 2312 times
BSTOP 3.jpg
BSTOP 3.jpg (138.04 KiB) Viewed 2312 times

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glovisol
Posts: 662
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

Post by glovisol » Wed Mar 27, 2019 7:41 pm

THREE SECTION/TWO STUB COAXIAL LINE BANDSTOP FILTER FOR FM BROADCAST BAND SUPPRESSION - CLOSEUP DATA

Here below more filter measurement data.
Attachments
BSTOP 4.jpg
BSTOP 4.jpg (223.4 KiB) Viewed 2284 times
BSTOP 5.jpg
BSTOP 5.jpg (142.11 KiB) Viewed 2284 times

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SteveAndrew
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Location: Gold Coast, QLD, Australia

Re: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

Post by SteveAndrew » Tue Apr 02, 2019 9:02 am

glovisol wrote:THREE SECTION/TWO STUB COAXIAL LINE BANDSTOP FILTER FOR FM BROADCAST BAND SUPPRESSION - CLOSEUP DATA
Hi Glovisol

Very nice screen-shots, great to see the analyser being put to good use.

Looking at your screen-shots, it looks as if you might be running under Vista. I've just installed the analyser on a Vista machine and I'm getting the same display as you are. Some of the control panels are displaying a fine lines around the border, there is an empty box to the right of the centre frequency box, and various other 'artifacts'. Also, after hiding and then re-showing the control panels, the top bar has shrunk and there is a wider margin between the spec display and the control panels to the right of the display.

This is not normal. It looks as if Vista may be handling some controls in a slightly different way. Under Win 10, everything looks fine. I'll add this to the bug list.

Steve

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glovisol
Posts: 662
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: FILTER DEVELOPMENT WITH NEW VER. 1.0a SPECTRUM ANALYSER SOFTWARE

Post by glovisol » Tue Apr 02, 2019 10:57 am

Hi Steve,

Thanks for your suggestions. I am NOT using VISTA, but Windows 7 Pro on an X61 IBM/LENOVO laptop.

Processor Intel Core 2 Duo CPU T7300 @ 2 GHz, RAM 2 GHz.

The Ver- 1.0a is providing very good performance in VHF as you can see in the GENERAL section. Will provide a full report later on.

Gianfranco

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