Hi,
I created my own block because I wanted to multiply the source sinusoids by
weights before transmitting them out, as shown in the attached GRC diagram
(my_block.png).
However, in my work() function for the block created, I am seeing that
simply multiplying the inputs by anything (first test was multiply by 1 and
then by complex(1.0,0.0)) completely alters the level of the signal.
Multiplying by unity should not do anything, but instead, using a spectrum
analyzer, I see the signal jump up by 30 dBm and then fluctuate up and down
for some reason, using the code below:
def work(self, input_items, output_items):
in0 = input_items[0]
in1 = input_items[1]
out0 = output_items[0]
out1 = output_items[1]
out0[:] = [x * 1 for x in in1]
out1[:] = [x * 1 for x in in1]
#did this afterward
#out0[:] = [x * complex(1.0,0.0) for x in in1]
#out1[:] = [x * complex(1.0,0.0) for x in in1]
return len(output_items[0])
When I don't multiply the inputs by anything, using the code below, the
signal stays stable:
def work(self, input_items, output_items):
in0 = input_items[0]
in1 = input_items[1]
out0 = output_items[0]
out1 = output_items[1]
return len(output_items[0])
Since my intent is simply to multiply the signal by some complex weights
(eventually), I'm not sure what I am doing wrong here. Something is clearly
wrong with how/what I'm multiplying, and I don't think I am understanding.
Please keep me posted. Thank you so much for the help!
--
Pavan
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