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Posts: 2,222 | Thanked: 12,651 times | Joined on Mar 2010 @ SOL 3
#1651
Originally Posted by xes View Post
@joerg_rw

Do you think that the pcb layout could be designed with a little space dedicated to optionally solder an rtl2832 and an e4000?

Usually, this would require a very little space and would allow to have onboard a dvb-t tuner and an sdr receiver.

Look here for an example of pcb with these ic:
http://www.radioelementi.it/public/dtb_sdr.jpg


Eventual rtl2832-gr IC availability:
http://www.oemstrade.com/search/RTL2832-GR/
Hi xes!
I know you're a brilliant datasheet and chip source detective, could you help us with finding sources and maybe even evaluating if we maybe can find some better tuner than the e4000? The major problem with all this is a) power consumption and b) antenna
I'd like to find a solution that could as well serve as pager but doesn't cut through the battery in <8h. SDR is not exactly idealy suited for that, by design. So we would like a tuner that also has standard narrow band AM/FM decode, low power consumption, and still an ultrawide tuning range to support all the different pager standards worldwide, as well as the rtl2832 based SDR. Ideally we accompany the whole contraption with a low power MCU like PIC or whatever, to do the decoding and detection of "your" pager number, or at least buffer a maybe 10s of audio samples, so the main CPU doesn't need to stay active all the time but rather can do bulk processing of the "audio" signal once every 10s.
Xes, we also would like to implement a decent low power (USB suspend capable) USB hub for all this, since we don't have that many USB busses on the SoC, so we need to share something - e.g. the modem USB link. Alternatively we at least need a USB-compliant (ultralow parasitic capacity, <10pF iirc, USB2.0 specs, 50Ohm(?) impedance) multiplexer to switch the external USB between USB receptacle and the internal usage

@all: please refrain from posting noise and funny meaningless posts to this thread, it's long enough without that noise. Thanks

Last edited by joerg_rw; 2014-01-12 at 16:22.
 

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