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From: | David Scaperoth |
Subject: | [Discuss-gnuradio] PLL Problem |
Date: | Tue, 27 Dec 2005 12:08:25 -0500 |
I have been using the gr.pll_ref_out(...) to lock a low IF signal.What I have discovered is that the pll seems to be overdriving the processor (2.4GHz P4) when its used at high sampling rates (200kS/sec or above). Is this something you have encountered??
The destination block also seems to affect the processing burden. When using the audio card sink as a destination block (24kS/sec) the pll seems to work fine for a sinusoidal tone, but when I replace the audio card sink with null sink (same sampling rate) or the oscope gui, the processor goes crazy. I may be setting this up wrong, but just the same I wanted to see if you have encountered this before.
I need this to work at high sampling rates like 2MS/sec so that I can detect larger bandwidth signals, but right now I'm no sure.
thanks david scaperoth
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