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Re: SDR-IQ Data Rate
- Subject: Re: SDR-IQ Data Rate
- From: Stan <verizon.net; stanw1le@xxxxxxxxxxxxxxxx>
- Date: Thu, 14 Feb 2008 08:54:30 -0500
maximum datarate may be up to 480 Mbits/sec, minimum datarate is 0 bits/sec.
If the SDR-IQ max datarate is 196Ksamples /sec, there is unused capacity.
In addition to the raw data, there is overhead to operate the USB protocol,
as well as the SDR-IQ overhead.
Probably only under ideal conditions can the USB handle the max rate:
short cables, no external noise,
no NACKs, "best most beautiful conditions".
> Could someone please help me with some simple arithmetic?
> I understand that the maximum data rate from the SDR-IQ USB2 port into
> Linrad is around 196kHz, which presumably means samples per second of
> both the I and the Q channels.
> Each sample is 16 bits, so that means that each sample of I and Q
> comprises 32 bits total.
> I also read independently that the maximum rate of USB2 is 480
> I realise that other data is also flowing back and forth, but the
> actual samples must surely represent the major part of the data flow,
> so I am unable to reconcile these 2 rates, and would like to
> Guy VK2KU
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