[time-nuts] GPS splitter measurements

Peter Gottlieb nerd at verizon.net
Fri Oct 12 00:27:35 UTC 2012


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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