[time-nuts] GPSDO 10 MHz Distribution Amp
Don Key
don.key at ntlworld.com
Sun Jun 21 23:14:23 UTC 2009
Hi Dave
Do you supply your DA1-4L distribution amp as a ready-built unit?
Your PDF Technical manual says you do, but there are only prices for the
kits on your ordering page.
Cheers.
Jim.
----- Original Message -----
From: "dave powis" <g4hup at btinternet.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Sent: Sunday, June 21, 2009 5:34 PM
Subject: Re: [time-nuts] GPSDO 10 MHz Distribution Amp
Hi Paul,
Sounds a reasonable approach to me where an equal 2 way split is needed, and
you already have adequate signal level available. May not be up to
'time-nuts' precision etc, but it is a practical method that will give what
you need. If you ever need to remove one Rig, just remember to terminate
the unused split output in 50R!
However, when you get yourself an analyser, sig gen or counter that takes
the 10MHz reference, then you will need a DA! Comeback to me
(http://g4hup.com) or TAPR then!
73,
Dave
http://g4hup.com
________________________________
From: Paul Christensen <w9ac at arrl.net>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Sent: Sunday, 21 June, 2009 5:18:51 PM
Subject: [time-nuts] GPSDO 10 MHz Distribution Amp
In the next couple weeks, I plan on distributing the output of my GPSDO to a
pair of Icom transceivers. I've thought about using a DA like the TAPR
TADD-1, but it seems that I can simply split the output of the +13 dBm GPSDO
with a Z=50, 3dB equal power divider, that will yield an output of ~ +9.5
dBm to each transceiver.
I can't foresee any port isolation issues that would make necessitate the
use of the DA for this application and the 3 dB "hit" in level to each
transceiver still seems reasonable for proper transceiver operation. Am I
not considering something important? Also, I do not want to add any noise
with such a distribution that would in any way destroy the excellent phase
noise characteristics of my GPSDO. Thoughts?
Paul, W9AC
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