[time-nuts] Timenoob - Cheap and simple 10MHz reference

[Bruce Griffiths]

-185dBW = -155dBm
so both sensitivity measures are equivalent.

Bruce

Peter Vince wrote:
> Thanks Ed, yes, I hadn't looked closely enough at the pictures.
>
> The "higher sensitivity" I mentioned came from the second line of the
> "Features" section near the bottom of:
> http://www.semiconductorstore.com/cart/pc/viewPrd.asp?idproduct=41599
>
> "Enables indoor use -173 dBW acquisition and -185 dBW tracking"
>
> although admittedly right underneath that in the "Specifications"
> section is does say:
>
> "Track Sensitivity: -155 dBm"
>
> A cased of "specmanship"?
>
>       Peter
>
>
>
> 2009/12/29 Ed Palmer<ed_palmer at sasktel.net>:
>    
>> The CW-12 consists of the CW-25 mounted on a circuit board with some glue
>> logic, connectors, etc.  The CW-25 itself is the surface-mount module in the
>> middle of the CW-12.  Compare the pictures - you'll see what I mean.  Both units
>> are listed as having a tracking sensitivity of -155 dbm.  I don't know what you
>> mean when you say that the CW-25 is more sensitive.
>>
>> By the way, the CW-12 works great indoors.  Through a typical wood-frame
>> construction I usually get 7 or 8 satellites with a cheap active patch antenna.
>> With a VIC-100 timing antenna, I usually have 10 or more satellites.  1 PPS
>>   performance is also very good.  Multiple measurements of 1000 periods
>> shows a standard deviation of<5 ns with a min-max range of<  30 ns.  This is
>> without sawtooth correction because this unit doesn't support it - even with the
>> Motorola software.
>>
>> Ed
>>
>> ----- Original Message -----
>> From: Peter Vince<pvince at theiet.org>
>> Date: Tuesday, December 29, 2009 10:21 am
>> Subject: Re: [time-nuts] Timenoob - Cheap and simple 10MHz reference
>>
>>      
>>> Semiconductorstore.com also have the CW25-TIM at a cheaper price ($64
>>> vs $89) and it is more sensitive, so can possibly work indoors.  They
>>> both, apparently, use the same NavSync chips, so does the '25 have
>>> disadvantages I haven't spotted?
>>>
>>>      Peter
>>>
>>>
>>> 2009/12/28 Hal Murray<hmurray at megapathdsl.net>:
>>>        
>>>>          
>>>>> Does the factory sell direct in small quantities ?
>>>>>            
>>>>  From here (California), googling for>Navsync CW12-TIM<  finds:
>>>>
>>>>          
>>> http://www.semiconductorstore.com/pages/asp/supplier.asp?pl=0138&gclid=CL_G5ar>  W-Z4CFU1M5Qod1XNWLA
>>>        
>>>> (Sorry for the line wrap.)
>>>>          
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