[time-nuts] Looking to find an antenna for a TrueTime XL-DC

Alexander Pummer alexpcs at ieee.org
Sat Aug 6 02:20:32 UTC 2016


Meinberg https://www.meinbergglobal.com/ makes complete down and up 
converter for GPS remote antennas

73
KJ6UHN
Alex

On 8/5/2016 3:11 PM, Rick Jones wrote:
> On 08/04/2016 06:02 PM, Hal Murray wrote:
>>
>> rick.jones2 at hpe.com said:
>>> HalM was kind enough to come over the other day with some antennae 
>>> which  we
>>> tried without success.
>>
>> I was going to suggest taking the cover off and looking inside but it 
>> fell
>> off my to-do list.
>>
>> GPS receivers are reasonably specialized.  I doubt it anybody makes one
>> targeted at the down-converter market.
>>
>> Is there an up-converter in there feeding a normal receiver?  If so, 
>> it might
>> be possible/easy to bypass.
>>
>> If it looks like a direct connection to a normal receiver, I'd guess 
>> it has
>> special firmware.  It might be possible to replace it with one with 
>> normal
>> firmware.
>
> My peanut gallery level of knowledge means I wouldn't recognize a 
> normal receiver if it reared up and, well, you know :)
>
> I do though have some pictures of the relevant section of the machine 
> with the cover off - two of the same shot at:
>
> ftp://ftp.netperf.org/dc-xl
>
> The antenna connection is the silver "square" on the left.  There are, 
> as you can see, a number of jumpers everywhere.  The daughter card is 
> connected at its "top left" in the picture where those "5s" of posts 
> are.  There are some shiny gold (plated?) posts there underneath them, 
> and a couple other vertical connections more towards the center.
>
> That entire assembly can slide out of the chassis after removing four 
> screws at the back.  I didn't try to remove the daughter card.
>
> rick jones
>
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