>>I noticed it only shows you a small amount of the bandwidth 15khz roughly. I was wondering if there is a tap point I can use before this filter. Is this filtering coming from the 45mhz crystal (roofing filter) ?
Yes, the filter is working.
I always thought it odd to put the tap there. The RTLSDR does not need the gain and
its just the wrong spot.
It would be better closer to the antenna but then gain the RTL-SDR could be the radio for RX.
The likely issue of taping before the 45mhz filter is you may see a lot of the cruft. But you
could try it and report.