I appreciate the advise. I bought one of the cheepo units just to see
it work (hopefully) but to run better location I'll probably pull 2 or
more of the better wire, so I can run multiple receivers. I also have
two different books, one off top of my head is Pasternak Enterprises, so
I can get a feel for what can adapt to what, and either buy it from them
or someone else.
I only am on here because of owning and at one time playing with a pile
or Truetime 468DC's which are now gathering dust.
I manage to charm Paul Swed (excuse the caps :-) into a design he did to
allow them to again display time, but am only now getting to where I may
attempt to use his design and convert mine.
Thanks to Tom for letting me in, and I've learned a huge amount from
everyone here.
thanks
JIm
On 7/2/2014 9:42 PM, Bob Stewart wrote:
Jim,
I'm a rather junior member of the list, but I wouldn't try to move 1PPS over that kind of distance; especially when
it's so easy to put the receiver right next to what needs the 1PPS. The pros are too small and the cons are too great.
There are a couple of vendors on ebay who sell "F" to "SMA" adapters. But, a warning: from
experience I have found that the RG6 is stiff and the SMA male adapter is fragile. While moving your unit around, it's
all to easy to snap the adapter off your unit. It's a few more bucks, but consider getting a short "F"
female to "SMA" male pigtail instead of just a machined adapter. I assume that it's not a problem on the
antenna end, since you're not connecting to a bulkhead connector.
In my house, I put the antenna in the attic, and snaked the RG6 through the
same opening that the DirecTV cable came through. I changed the wall plate to
add another F connector. From there is a short run of RG6 to my splitter, and
then a few feet of RG316 to my receiver.
Bob
________________________________
From: jim s <[email protected]>
To: Discussion of precise time and frequency measurement <[email protected]>
Sent: Wednesday, July 2, 2014 12:17 AM
Subject: Re: [time-nuts] FASTRAX GPS
Bob,
I was being a bit lazy. The 15' distance gets from a couple of spots in
the room with my systems and lab, and also is already terminated, and
there is no issue with the power since it would be totally contained in
the unit.
But your suggestion and some work making the cables would work best.
To you and Hal who suggested it, is this unit suitable for outputing a
1pps timing signal? Wouldn't the long serial option Hal suggestion mess
that up, vs. using this method to put the Fastax as close as possible to
a system which which would have the systems gpio and serial ports attached?
Thanks to you both for answering.
jim
On 7/1/2014 9:30 PM, Bob Stewart wrote:
Jim,
Are you trying to find out how to hook up a receiver in your
office/radio room to an antenna that is some ways away? Or are you
specifically trying to remotely hook up a receiver near your antenna?
If the former, just use RG-6, like for cable TV, with adapters on each
end. RG-6 has such low loss that the impedance change is not an
issue. I've got a 30+ ft run up to the attic to a cheap GPS puck
antenna for my setup. Others have much longer runs and it works OK.
Bob
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