On 12/17/11 9:01 AM, Magnus Danielson wrote:
On 12/17/2011 05:10 PM, Jim Lux wrote:
On 12/17/11 6:58 AM, Azelio Boriani wrote:
Correct: I was thinking how to simulate an only bird. The RACAL GPS101
is a
single channel simulator and maybe made that way. Then it is possible to
place a number of 1 channel simulators at a distance...
I was thinking more along the lines of how would one do a indoor test
setup. Magnus's comment was a good one.. if you want to simulate
multiple channels, you'd probably want some sort of resistive combiner.
Yes, but if you have them all in the same sample clock, adding them
together you can do a smaller resistor chain DAC. Three or four bits can
be done without much performance setback.
Jim, would you be satisfied with L1 C/A only or do you need L1/L2 P-code
or even pseudo-P(Y)?
L1 C/A
But the real question isn't how to generate the signals (that's straight
forward).. it's "how good does the oscillator have to be" to effectively
test the receiver, in the sense of measuring it's timing performance.
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