On Thu, 24 Nov 2011 11:19:37 +0000 Poul-Henning Kamp <p...@phk.freebsd.dk> wrote:
> Has any of you played with this: > > http://www.sparkfun.com/products/8238 I had a look at this (and a few other GPS SDR solutions) back a year or two ago and decided that they are either way too expensive or do not lend themselves well for time-nutty experimentation and are still too expensive. I guesstimate that a L1 GPS SDR receiver (SAW filter + LNA + down mixer + filter + second downmixer + filter + 8bit 40MHz ADC + FPGA) could be build with a budget of 500CHF at single pieces, rivaling the price of the sparkfun device you mentioned, while being 1) fully documented and 2) could lend itself to tinkering. Hence i dont think it's worth buying such a device (unless you are a software only guy who sees hardware as a necessary evil). An L1 + L2 receiver should be not that much more expenive, but the availability of filters for the L2 range is bad (you'd have to build one in microstrips) and depending on the exact design of the IF stage you'd have to doublicate the L1 path earlier or later for the L2 path. Hence i gues, a L1 + L2 reciever should have an additional cost of 100-200CHF (to the L1 only receiver) Attila Kinali -- The trouble with you, Shev, is you don't say anything until you've saved up a whole truckload of damned heavy brick arguments and then you dump them all out and never look at the bleeding body mangled beneath the heap -- Tirin, The Dispossessed, U. Le Guin _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.