[time-nuts] TrueTime XL-AK Questions
w1ksz at outlook.com
Sat Aug 26 12:15:04 EDT 2017
Seems like I have more than one problem.
Did a voltage check on the Antenna Input BNC and got zero !!
Thanks for the reply,
73, Dick, W1KSZ
Sent from Outlook<http://aka.ms/weboutlook>
From: time-nuts <time-nuts-bounces at febo.com> on behalf of Bob kb8tq <kb8tq at n1k.org>
Sent: Saturday, August 26, 2017 7:06:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] TrueTime XL-AK Questions
The older GPS units had a downconverter in the antenna and passed an IF frequency
back to the receiver. There also was an era when the standard antenna was fed 12V
(rather than 5V) and had 50 db of gain (rather than 20 to 30 db). Most modern hockey
pucks will be unhappy with 12V.
> On Aug 25, 2017, at 6:13 PM, Richard Solomon <w1ksz at outlook.com> wrote:
> I was given two of these about 20 some years ago. At that time they both worked
> fine, except the "keep-alive" batteries were quite low. But they did lock up to the
> GPS Satellites.
> I pulled one out today to try out (slow day !!) but I had this nagging feeling that
> they required a different antenna than the run of the mill GPSDO. I have one of
> the e-Bay "hockey puck" antennas hooked up to it and the status window says
> ..."looking for satellites"... .
> Do the TrueTimes require something special in an antenna ?
> Thanks, Dick, W1KSZ
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