[time-nuts] GPS antenna splitter recommendation?

[Joseph B. Fitzgerald]

Frank,

You are correct that more ports results in more loss -
Mini-Circuits has nice data sheets for their products.   The first one has about 6.8 dB loss at GPS frequencies. - a "perfect" splitter would have 6.0 dB

That last one is actually a SIX way splitter, two of the outputs have blue caps on them.  A little under 9dB loss at GPS frequencies.

https://www.minicircuits.com/pdfs/ZN4PD1-63HP-S+.pdf
https://www.minicircuits.com/pdfs/ZB6PD-2+.pdf

-Joe KM1P



________________________________________
From: time-nuts <time-nuts-bounces at lists.febo.com> on behalf of Frank O'Donnell <time at inkbox.net>
Sent: Wednesday, April 29, 2020 10:06 PM
To: time-nuts at lists.febo.com
Subject: Re: [time-nuts] GPS antenna splitter recommendation?

On 4/29/20 6:01 PM, Bob kb8tq wrote:
> Here’s a few:

Bob, thanks very much for the suggestions.

Five of the seven splitters in your list appear to offer a total of two
output ports. What I'm looking for is one that will accommodate
(specifically) three or four ports.

Of the remaining two on the list, this one:

> https://www.ebay.com/itm/Mini-Circuits-ZN4PD1-63W-S-RF-Power-Splitter-250-6000MHz-Qty-Available-GOOD/133387795141?hash=item1f0e883ac5:g:tdoAAOSwAbxel2o~ <https://www.ebay.com/itm/Mini-Circuits-ZN4PD1-63W-S-RF-Power-Splitter-250-6000MHz-Qty-Available-GOOD/133387795141?hash=item1f0e883ac5:g:tdoAAOSwAbxel2o~>

has five outputs and costs $50. Probably usable, though I was wondering
if going with additional output ports could increase possible loss? And
also, the price isn't a show-stopper but is a little high for what I was
hoping for.

The other one:

> https://www.ebay.com/itm/New-Mini-Circuits-ZB6PD-2-S-800-2000-MHz-Power-Splitter/114155096838?hash=item1a942c8b06:g:jNIAAOSwedNedT92 <https://www.ebay.com/itm/New-Mini-Circuits-ZB6PD-2-S-800-2000-MHz-Power-Splitter/114155096838?hash=item1a942c8b06:g:jNIAAOSwedNedT92>

isn't entirely clear to me. The text says it's a three-port, but I count
four visible connectors that look like output ports, and two more that
might be hiding under caps. This one goes for $19.90.

Given all of that, do either of these two seem like the optimal way to
go if I want to plug in three or four GPSDO's?

Thanks again,

Frank


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