[time-nuts] New pics of RFTG-m-Rb, and some comparison details

[Bill Hawkins]

So, if we have two sources of 15 MHz in a CDMA minicell, each with
its own SMA connector, what module receives those two sources and
decides which one to use?

Why use XO and Rb when either could be made redundant for extended
reliability? (not the British sense of "made redundant")

Bill Hawkins
 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rex
Sent: Sunday, December 31, 2006 7:08 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] New pics of RFTG-m-Rb, and some comparison
details

On Sun, 31 Dec 2006 09:22:50 -0600, "Jason Rabel"
<jason at extremeoverclocking.com> wrote:

>Pretty sure that the RB is disciplined from the XO through the 
>interface cable. I posted the pinout a couple times before so people 
>can make their own.

I don't so. I think the RB units have just their factory calibration.
Read Richard H McCorkle's message in the other thread. He describes the
over-all system and it seems to match what is known about stuff that's
in the boxes, so far.

I just got an RFG-RB which seems to be a few years newer than the
RFTG-m-RB's. In that one, I can't find any connection to the LPRO Rb
module, in it, that could cause it to be disciplined. The one I have
seems to be stipped down from the RFTG-m-RB. The main board is much
simpler but seems to have the same basic circuitry for 15 MHz
generation.



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