How to use the discrete unit delay block with the waveform as the input data type?

Hi,
I'm using LabView 2011 to implement a design system. I want to first downsample the input signal and then go through the discrete unit delay function. However, after the unit delay function, i don't get the right output, is there a way to fix that?
The input is fixed to be the simulate signal since i'm using it for other implementation as well and i don;t want to change it.
plz see the attachment , thx!
Attachments:
test2.vi ‏355 KB

Hi Tim,
Thanks for replying!
What u did is exactly what I want except that I want to downsample the simulate signal first before I put it into a delay block.
I tried what u said, however, it only works for very small frequency such as 0.01 Hz. When I set the input to 10 Hz, the delay block doesn't work at all. For the diagram u have, what is the input frequency u set to the simulate signal?
The reason I'm use the Express VI is because I use it as the input of the frequency estimation block. So basicly what I'm doing is :
sine wave ->downsample it->delay the downsampled signal and do some numerical calculation(adding,multipling) ->estimate the frequency of the output signal -> this frequency is used to determin the sample factor in the downsampling process.
I attached the VI with the downsamped involved
I can't copy the downsample.vi because I use the evaluation version 30 days for that toolkit .
I attached the VI for frequency  estimation as well.
Thanks so much!
Ivy
Attachments:
Testing.vi ‏238 KB
Frequency Estimation.vi ‏61 KB

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