Forum: GNU Radio Re: The shortest pulse length

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seph 004 (Guest)
on 2007-03-05 16:36
(Received via mailing list)
Thanks for the advice. I don't think that's my only problem though. My
vector is currently supposed to produce 2500 samples. This combined with
an interpolation factor of 512, should give me 10 msecs of signal. Have
I calculated this correctly? Also, I'm using the gr.modulation block to
make the signal, but if it is producing complex output, does that mean
I'm actually sending 5000 samples?

At the moment, sending my 2500 samples produces an output only 1 msec
long.

Regards

Lance

----- Original Message ----
From: Eric B. <removed_email_address@domain.invalid>
To: seph 004 <removed_email_address@domain.invalid>
Cc: David S. <removed_email_address@domain.invalid>;
removed_email_address@domain.invalid
Sent: Friday, March 2, 2007 7:06:06 PM
Subject: Re: [Discuss-gnuradio] The shortest pulse length

On Fri, Mar 02, 2007 at 12:41:40AM -0800, seph 004 wrote:

> when I run the script. The problem is the pulse duration I'm seeing
> is much shorter (about 1/10) than what I expect.
>
> Regards
> Lance

Unless the total number of samples comes out to a multiple of 128,
some will left in the host buffer and not transmitted across the USB.
Try padding your vsource data with zeros to a multiple of 128.

Eric
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