, 2017 7:06:57 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] TrueTime XL-AK Questions
Hi
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
(
Dick,
I have had a couple of the XL-AK receivers here for several years.
They both do not have the down converter option and do put out 5 volts
to the antenna jack. It is simple to measure with a volt meter into
the antenna jack.
While they kind of worked with a hockey-puck antenna, they a
Hi
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.
Bob
>
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 an
