[time-nuts] No GPS satellites

[paul swed]

A fellow time-nut shared the manual for the xl-dc and I downloaded it.
It clearly states that it has a down converter. That was very typical of
these generation receivers. As examples the Odetics and Austrons. It
allowed for very short antenna runs or virtually 0 length antenna runs and
losses. The DC468 goes used the same trick.
Almost always the receivers show up without the dowconverter because those
stay on the roof. Without the down converter the units useless.
I have been lucky in some exploits to use odetics down converters with the
austron and the another approach using older styles semi-integrated
receivers to fake it.
So if you want to experiment there is hope. Though it seems each receivers
a bit different.The older Truetime manuals were pretty good with schematics
and explanations. Unfortunately it looks like the new manual has little to
go on.
Regards
Paul
WB8TSL

On Thu, Feb 26, 2015 at 4:46 PM, Bill Hawkins <bill at iaxs.net> wrote:

> Doesn't the DC in the model number mean "down conversion" or something
> like that?
>
> Seems to me it did in the obsolete 468-DC GOES time receivers, which had
> to down convert to about 1.8 MHz.
> Also, the down conversion was more than a simple local oscillator and
> mixer. You had to have their antenna to make it work, as the mixer was
> in the base of the antenna.
>
> Bill Hawkins
>
>
> -----Original Message-----
> From: Tim Shoppa
> Sent: Wednesday, February 25, 2015 7:56 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] No GPS satellites
>
> Yes, the XL-DC and other Truetime models had as an option for long cable
> runs, a downconverter in the antenna. I don't know how to tell the
> difference from part number, but I know the truetimes my employer uses
> all have the downconverter option and the option is very common.
>
> Tim N3QE
>
>
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