[time-nuts] ADEV

[Mike Feher]

10 MHz locked LNBs do not use a separate connector. Everything goes down/up
the single main coax. The typical L-band down-converted frequency and the 10
MHz are easily separated, as is the DC. These are definitely not
inexpensive. Regards - Mike 

Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-901-9193 cell

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of jimlux
Sent: Sunday, November 14, 2010 11:49 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] ADEV

David I. Emery wrote:

> 	3. External reference LNBs with 10 MHz (pretty universal) going
> up the cable that also carries power and brings the L band signal down.
> I'm not entirely sure how many of these designs simply bandpass filter
> and then limit the 10 MHz and use that directly as a PLL reference and
> how many phase lock a VCXO to the 10 MHz coming in.  Otherwise similar
> (and often  derived from designs for) the internal reference PLL types
> in 2 above.

And, I'll bet those are fairly pricey.. (after all, it needs another 
connector, and that's a price sensitive application..)