[time-nuts] Using cheap sound cards for measurements

[Don Latham]

Not for my uses, I think. USB 2.0 plenty fast with a good computer.
I've been digging. Creative has a new E-MU 0202 that has no optical or midi 
costs $99, has 100 ps sampling jitter with an internal crystal sampling 
clock, 24 bit, zero latency, up to 192 kHz sample rate,  113 dba snr, about 
the same channel isolation.
Have a couple more to look at, but this one looks like the bee's knees...
Don

----- Original Message ----- 
From: "Dave Brown" <tractorb at ihug.co.nz>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Friday, August 21, 2009 10:17 PM
Subject: Re: [time-nuts] Using cheap sound cards for measurements


> Are USB data transfer delay times an issue?  IIRC they can vary quite a 
> lot, depending on processor loading etc.
> DaveB, NZ
>
>
> ----- Original Message ----- 
> From: "Don Latham" <djl at montana.com>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts at febo.com>
> Sent: Saturday, August 22, 2009 3:42 PM
> Subject: Re: [time-nuts] Using cheap sound cards for measurements
>
>
>> I'm looking to stay under $200, but that's why I want USB if that makes
>> any sense...
>> Don
>>
>> Hal Murray
>>>
>>>> On this track, what's the group opinion as to the best USB sound
>>>> "card"? I'm looking for one for time as well as sd radio use. Should
>>>> have the best separation, best s/n, highest digitization rate, 24 bit,
>>>> etc. Any recommendations?
>>>
>>> I'd be interested in not-quite-best or even far-from-best if the price 
>>> is
>>> right.
>>>
>>> Is there a sweet spot on price/performance for USB audio gear?
>>>
>>>
>>> --
>>> These are my opinions, not necessarily my employer's.  I hate spam.
>>>
>>>
>>>
>>>
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>>
>>
>> -- 
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLP
>> 17850 Six Mile Road
>> POB 134
>> Huson, MT, 59846
>> VOX 406-626-4304
>> www.lightningforensics.com
>> www.sixmilesystems.com
>>
>>
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