Brian Padalino wrote:
On Mon, Dec 15, 2008 at 4:41 PM, Aadil Volkwin <[email protected]> wrote:
"The full range on the ADCs is 2V peak to peak, and the input is 50 ohms
differential. This is equates to 40mW, or 16dBm."
I am not sure where that sentence came from, but it is incorrect. The
correct statement would be:
"The full-scale range of the ADCs is 2V peak to peak. The BasicRX and
LFRX have unity voltage gain and an input impedance of 50 ohms. Thus,
their full-scale input is 2Vpp, or 10dBm."
2Vpp is equal to 1 Volt peak, or .707 Vrms. At 50 ohms, this comes to
10 mW or 10dBm. Also, while the ADC has a nominally 200 ohm input
impedance, the BasicRX and LFRX terminate in 50 ohms.
Matt
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