[time-nuts] GPS splitter measurements

Edgardo Molina xe1xus at amsat.org
Thu Oct 11 20:53:01 EDT 2012


Dear Peter,

If your budget is $10 for an R.F. Project, spend $1 on the radio and $9 on the antenna.

At least me, if I troubleshoot by replacing parts, I would be missing the fun, experience and learning out of it.

Just my 0.02 cents

Regards,

Edgardo Molina
Direccción
IPTEL
www.iptel.net.mx
52 55 55202444



On Oct 11, 2012, at 7:27 PM, Peter Gottlieb <nerd at verizon.net> wrote:

> A stupid question, but why would you bother testing an antenna?  I would think with antennas so cheap and labor expensive it would be far more efficient to make a single site visit and simply replace the suspect antennas with new ones.
> 
> Peter
> 
> 
> On 10/11/2012 7:15 PM, Azelio Boriani wrote:
>> To test this kind of items, you have to play with DC-blocks and bias-tees.
>> Rather tedious but necessary. I know as at times I have to test
>> questionable GPS antennae that return after lightning strikes.
>> 
>> On Fri, Oct 12, 2012 at 1:09 AM, paul swed <paulswedb at gmail.com> wrote:
>> 
>>> Magnus what would the possibility be of measuring an 8 way satellite
>>> splitter? The $7 wonders with dc pass through. That looks like a very nice
>>> network analyzer you have.
>>> Regards
>>> Paul
>>> WB8TSL
>>> 
>>> On Thu, Oct 11, 2012 at 7:05 PM, Magnus Danielson <
>>> magnus at rubidium.dyndns.org> wrote:
>>> 
>>>> On 10/12/2012 12:16 AM, Azelio Boriani wrote:
>>>> 
>>>>> Please take care that the S14WI is "smart": if it doesn't sense a DC
>>>>> current on the antenna port then it reports that to the user ports and I
>>>>> think it can even power off the internal amplifier, this can account for
>>>>> the observed loss instead of the gain.
>>>> I did consider this. but did not have the time and energy to follow that
>>>> up at the time. It was only when I got home that I could dig up the
>>>> datasheet and manual of the S14WI. Didn't want to fry it in the lab.
>>>> 
>>>> I rather do an incomplete lab quick and safe. I reports warts and all.
>>>> 
>>>> I'll see if I get time to re-do it tomorrow.
>>>> 
>>>> Regardless, I want to get things going. More people than me should be
>>> able
>>>> to do this.
>>>> 
>>>> 
>>>> Cheers,
>>>> Magnus
>>>> 
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