[time-nuts] Z3801A & ThunderBolt USING SAME ANTENNA?

Magnus Danielson magnus at rubidium.dyndns.org
Wed Jul 9 05:55:41 EDT 2008


From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
Subject: Re: [time-nuts] Z3801A & ThunderBolt USING SAME ANTENNA?
Date: Wed, 09 Jul 2008 13:54:39 +1200
Message-ID: <48741A5F.8050708 at xtra.co.nz>

Bruce,

> The 50 ohm BNC connector is rated up to 4GHz, the 75 ohm version to 2GHz.

Modern 75 Ohm BNC and cable is rated for 4.5 GHz. Used for 2.97 Gb/s HD-SDI.
See Trumpeter and Belden cables.

> The F connector performance degrades above 1GHz but is still useful to 
> several GHz.
> Both originated in the early 1950's.
> The Thunderbolt should work well with 50 ohm cable as its far from a 
> precision match to either 50 or 75 ohm cable.

Cheers,
Magnus




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