Re: Has anyone built Ashhar's Specan?

Jerry Gaffke
 

The 45mhz crystal filter is likely rather narrow as well.
Perhaps have an option to replace the 45mhz crystal filter with something like this:  http://www.mouser.com/ProductDetail/Murata-Electronics/PX1002/?qs=Xb8IjHhkxj400FumWvF4dQ%3D%3D
Mouser summary says it's 25khz wide, but datasheet says the 3db passband is typically +/- 25khz from center, so 50khz wide.

Don't have to stuff this sort of thing on all uBitx boards, not everybody will want a spectrum analyzer.
But would be nice if it was easy to hack in, with pads on the board for the PX1002 and AD8310.

Jerry


On Wed, Jul 26, 2017 at 10:36 am, Jerry Gaffke wrote:
Maybe switch between the 45khz crystal filter, the 12mhz crystal filter, and analyzing the audio with an ADC.
Jerry, KE7ER
. . .

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