[Hackrf-dev] HackRF-dev Digest, Vol 43, Issue 15

[Cinaed Simson]

Hi - it's not clear what you by it doesn't have enough power.

Since it worked on the Win10 machine, I going presume by "not enough
power" you don't mean electrical power - you mean it's not as capable as
you had hoped.

In any case, I know nothing about Win10, but you need to figure out how
many bytes/sec you're able to receive at the default sampling rate of 10
MHz.

My guess would be using the command line

  hackrf_transfer -r NUL

If the number of bytes/sec doesn't equal approximately 2*(sampling
rate), then you need to do a binary search to determine your maximum
sampling rate

  hackrf_transfer -r NUL -s 5000000

Whey you find your maximum sampling rate, the optimal sampling rate may
be as low half of the maximum since you'll most likely have CPU load
from your SDR.

In short, USB I/O uses the CPU so the CPU could be the bottle neck even
with a USB 3.0 device.

Also, a hub can introduce timing problems.

-- Cinaed


On 06/10/2016 07:00 AM, Ian Little via HackRF-dev wrote:
> Hi
> I am often need to have a  Win10 machine in my lab to run some proprietary  software. I picked up a very capable Kangaroo based on the Intel Atom x5-Z8500 it works very well and a budget desktop replacement.
> I am also running SDR# using the HackRF One. The Kangaroo USB2.0/3.0 does not supply enough power to the HackRF One. I bought a powered USB3.0 Hub 
> but it still does not supply enough power.
> 
> Has anyone found a high powered USB3.0 Hub that they could recommend?
> 
> Ian
> 
> 
> 
> On May 24, 2016, at 12:29 AM, hackrf-dev-request at greatscottgadgets.com wrote:
> 
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>>   1. Interesting (davidmarkusgoldstein at gmail.com)
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>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Mon, 23 May 2016 21:01:17 -0400
>> From: "davidmarkusgoldstein at gmail.com"
>> 	<davidmarkusgoldstein at gmail.com>
>> To: hackrf-dev <hackrf-dev at greatscottgadgets.com>
>> Subject: [Hackrf-dev] Interesting
>> Message-ID: <uusbn90in252ke0687y901q6.1464050947928 at email.android.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> I just wanted to share a bit of interesting info: ?in 1998 I worked for a telecom company as a temp. ?They were realtek people. ?They were already talking about open sourcing development on high speed transmission using the twisted pair, especially for China. ?They got up to like 1gbps now...back then, I had the wr1000i sdr...they were interested.
>>
>> Thx for the help btw. ?Has anyone preordered limesdr?
>>
>> David
>>
>>
>> Sent via the Samsung Galaxy Note? II, an AT&T 4G LTE smartphone
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