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

Rick Jones rick.jones2 at hpe.com
Fri Aug 5 18:11:11 EDT 2016

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:


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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