[time-nuts] Radio with GPSDO
lists at lazygranch.com
lists at lazygranch.com
Wed Apr 24 11:11:41 EDT 2013
In a world of digital comms with very capable competition, AOR has been looking for a reason to exist. They have turned to high end gear. For some time now, their radios were DDS and capable of running from an external 10MHz. I suspect they are used in a rack of gear to direction find. The black box SDR version is the next obvious step since nobody was actually playing with the knobs anyway.
I would be surprised if there were vans with 3 or 4 of these black box radios as part of a "stingray" or "silent ping" set up using correlation techniques to RDF cellular users. It has enough bandwidth to cover all known cellular providers. It could probably RDF wifi.
-----Original Message-----
From: Jim Lux <jimlux at earthlink.net>
Sender: time-nuts-bounces at febo.com
Date: Wed, 24 Apr 2013 04:33:26
To: <time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] Radio with GPSDO
On 4/23/13 6:54 PM, lists at lazygranch.com wrote:
> http://www.aorusa.com/receivers/ar2300.html
>
> Just a FYI.
>
Interesting..
I see they use the OEM GPS from Garmin. I wonder what kind of DO
performance they get, and whether they actually discipline the
oscillator or just measure it. Since they've got a DDS, they could use
a quiet fixed OCXO, undisciplined, and just adjust the DDS control word.
Fascinating, also, that they provide a raw I/Q sample output. Clearly,
that's the way of the future, and it makes sense.
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