SDS100/SDS200: Question about filters on SDS 200

[I_Am_Infinite]

Does anyone know exactly what the filters do, like do they attenuate? I notice like invert, normal, auto the RSSI is not as strong and on wide invert, wide normal, wide auto the RSSI is stronger what is the reason for this?...

If there was a thread about this already I must missed it, so sorry if there was discussions on this already

 

[dmfalk]

Does anyone know exactly what the filters do, like do they attenuate? I notice like invert, normal, auto the RSSI is not as strong and on wide invert, wide normal, wide auto the RSSI is stronger what is the reason for this?...

If there was a thread about this already I must missed it, so sorry if there was discussions on this already

Perhaps this should help?

https://forums.radioreference.com/attachments/sdsx00filters-pdf.114624/

 

[I_Am_Infinite]

Perhaps this should help?

https://forums.radioreference.com/attachments/sdsx00filters-pdf.114624/

Thanks, that let me know u can do it by favorite list and not just globally for all. Wish it had more specific information about each setting and what it's actually doing.

 

[buddrousa]

https://wiki.radioreference.com/images/3/31/SDS100_SDS200_Filter_Settings.pdf

 

[mr10pt]

I saved this explanation from a posting a couple of years ago.

 

[Ubbe]

the RSSI is stronger what is the reason for this?...

RSSI are measured within a very wide frequency range and includes any interfering signals that you do not want in your scanner. So when setting filters you should aim at the weakest possible signal I.E. the least amount of interfering signals.

For digital signals you should only use Digital Error Count as a reference, the lowest amount or errors. For analog transmissions you can use Noise, choosing the lowest noise value but only note the value when there's no modulation as any speech will change the noise level.

/Ubbe

 

[nessnet]

Also, an important part of the filter discussion is to keep in mind that the filters are designed to mitigate RFI at a CERTAIN LOCATION.

So, every time you move the radio, the RF environment also changes and thus, so does the need (or NO need) for a filter. In fact, if you don't have any RFI, and want the strongest signal possible, turn the filters off.