SDRplay Community Forum

fix 400mhz weakness

I can't say I've noticed any particular weakness at 400 MHz. Mine shows a slight dip there (a few dB) but that may be my homebrew antenna diplexer. Of more concern is the oddness that starts around 255 MHz. I can't remember where it stops, but the RSP performs poorly in this area. It may be image response to the strong DAB transmissions. If it is there may be no cure apart from adding external filtering.

Hello g1hbe,
I am afraid that you analysis is correct. Spurious signals at around 255 MHz are images of DAB signals. These occur as a result of the DAB signals mixing with harmonics of the block converter LO. The resultant IF then mixes with harmonics of the I/Q down-converter LO to generate on channel signals and hence spurious images. The only way to improve the situation is to improve the filtering of the DAB signals.

Sincerely

SDRplay Tech_Support

Dear Jon and SDRPlay Team
Have you considered releasing a SDRPlay V2 ?
Is it on your roadmap?
(I want to know whether we can expect a V2 in near future)

Hello Sasan,
There will be a RSP2, but we are still in the process of undertaking technical feasibility and defining the feature-set. Unfortunately, we are unable to give a schedule at this point in time.

Sincerely

SDRplay Tech_Support