-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<[email protected]>:
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<[email protected]>
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<[email protected]>:
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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