# GNU Radio - Signal Keeps Getting Smaller?

Really bizarre issue here. Here is an image of a signal taken from SDR Sharp:

Freq: 926.365M Bandwidth: 30k

Now, using the above measurements, here is this same signal observed in GNU Radio with the QT Waterfall Sink at 5M sample rate:

Here is the same signal at 2M sample rate:

Here is the same signal at 10K sample rate:

And at 1K:

This cannot be possible?!

My GNU Radio flow is as simple as possible, but here's what it looks like:

Can anyone explain this? Surely as I close in on the signal, it should be filling up the Waterfall much more.

Most likely, the sample rates you are asking for are unsupported by the hardware. The osmocom source is just a wrapper around a bunch of specialized device drivers, and generally you're not going to notice if you don't get the sample rate you asked for unless you're also e.g. using an audio sink so you hear the audio skipping.