Search found 4 matches

by kevin29
Tue Nov 12, 2019 9:25 am
Forum: Troubleshooting Help
Topic: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?
Replies: 7
Views: 2590

Re: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?

Thanks for the advice with Noise Gen, I agreed that it would be wise to put an attenuator in series to prevent overloading/damaging the SDR. An attenuator set would be my next in the RF shopping list. :) I have read a while back that the higher the supply voltage the better linearity of the noise ba...
by kevin29
Fri Nov 08, 2019 4:56 pm
Forum: Troubleshooting Help
Topic: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?
Replies: 7
Views: 2590

Re: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?

Looks like that was the case, the noise source signal was saturating the SDR input. Made myself an attenuator in series with the noise generator and the SDR. After that the response becomes what was expected.

Thanks for the hint. :D
by kevin29
Wed Nov 06, 2019 8:19 am
Forum: Troubleshooting Help
Topic: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?
Replies: 7
Views: 2590

Re: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?

Here is the image of my SDR dongle internals with D12 replaced with what looks to be a capacitor.
SDR Internals.JPG
SDR Internals.JPG (155.06 KiB) Viewed 2589 times
by kevin29
Wed Nov 06, 2019 8:17 am
Forum: Troubleshooting Help
Topic: RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?
Replies: 7
Views: 2590

RTL-SDR Dongle V3: Frontend Effecting Filter Response, Manufacturing Fault?

Good day, I have just received my RTL-SDR Dongle V3 and the RTL-SDR FM rejection filter that I purchased from RTL-SDR.com today. Having previous experience using Nooelec's RTL SDR dongle I am well familiar with setting up the dongle for SDR reception and spectrum analysis. As a first exercise, I dec...