[time-nuts] Software Sawtooth correction prerequisites?

Dr Bruce Griffiths bruce.griffiths at xtra.co.nz
Sat May 12 05:11:52 EDT 2007


Lester

I have no idea you'll need to contact Acam direct.
http://www.acam.de

Bruce
Lester Veenstra M0YCM K1YCM wrote:
> What is the cost of the two channel pci system, if you happen to have the
> price in hand. If not, I will ask direct.
>
> Full Name:      Lester B Veenstra 
> Job Title:      Communication Sys Des Engr Sr Stf 
> Department:     6L01 Site Operations Collaboration  and Reach-Back (SOCAR) 
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>
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>
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>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Dr Bruce Griffiths
> Sent: Saturday, May 12, 2007 7:00 AM
> To: Tom Van Baak; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Software Sawtooth correction prerequisites?
>
> Tom Van Baak wrote:
>   
>>> Define cheap.
>>> You can already get essentially single chip TICs with a resolution (and 
>>> accuracy) better than 100ps for around 100 Euros or so.
>>>     
>>>       
>> Has anyone in the group tried one of these? I would very
>> much like to see the results.
>>   
>>     
>
> All except Xavier seem to have shied away from obtaining these on cost 
> grounds and the need to layout a 4 layer PCB.
> Although the vendor does offer an evaluation system (External box plus 
> card plugs into PC with fat multiconductor SCSI type (but not SCSI 
> signalling)cable connecting the two), too expensive for general use but 
> perhaps useful for performance evaluation.
> The above price was for an earlier version the later reduced cost higher 
> resolution version (range 5 nanosec - 4millisec) should be cheaper.
> The range can easily be extended to years if required (using CPLD 
> counters (or even a PIC with built in counters - eg PIC18F4550) + 
> software+ 74AC164).
>   
> Bruce
>   





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