Clay :
The difference is more than made up in the the fact that the new AD
operates at 245 MHz and the old AD is 200 kHz and you get huge processing
gain in the downsample and filter process greatly increases the dynamic
range.
Bob
On May 18, 2012 4:46 PM, Clay W7CE w...@curtiss.net wrote:
On Fri, May 18, 2012 at 1:45 PM, Clay W7CE w...@curtiss.net wrote:
Did anyone else notice that the receivers on the 6500 and 6700 use a
16-bit ADC rather than 24-bit like the 5000A? That reduces the dynamic
range by up to 48 dB (same dynamic range as the 1500).
No. Learn about decimation.
Hi Bob,
If it's OK with everyone, I'd like to count this as my oh duh moment
for today (my target is no more than one per day). I wasn't thinking
about decimation. However, assuming a bandwidth of 192 kHz and a sample
rate of 245 MHz, doesn't that only give an extra 5 bits or so of
Clay,
Just in rough numbers, you get a 1/2-bit for every divide-by-two decimation
you do. If you are looking at dynamic range in a 500Hz bandwidth (this is
what we typically do). The math I generally use to get there is
log(f1/f2)/log(2)/2. I just think this way as a programmer (do everything
4 matches
Mail list logo
