[time-nuts] Lucent RFTFm-II-XO

[Bill Hawkins]

As to what you would see, find the manual for the Motorola receiver for
details. I don't have the link, but somebody else does.

You get some info about the device and info about each satellite.

You can use a 422 to USB converter or clip on either wire with a digital
scope that decodes simple serial streams, like PicoScope.

Bill Hawkins
 

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob
Camp
Sent: Wednesday, September 14, 2016 6:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent RFTFm-II-XO

Hi

These days, a RS-422 to USB adapter is a sub $20 item, even from a "name
brand" outfit with real drivers. . If you shop a bit, you can get some
dirt cheap USB to 422 adapters at the risk of having issues with the
drivers (now or down the road). 

Bob

> On Sep 13, 2016, at 11:44 PM, Chris Waldrup <kd4pbj at gmail.com> wrote:
> 
> Hi,
> 
> Regarding the Lucent box- I wanted to let everyone know that once it
locked to satellites, I have a 10 MHz out. 
> The output was a square wave with some ringing, but I built a three
element low pass filter and now I have a really nice 10 MHz sine wave. 
> Thanks to all!
> 
> Last question.... I see it has a RS-422 output on one of the
connectors. If I build or buy a 422 to 232 converter can I expect to be
able to view the unit's data output with something like Lady Heather or
Tboltmon? Or at least see an output with Hyperterminal?
> 
> Thank you. 
> 
> Chris
> KD4PBJ
> 
>> On Sep 6, 2016, at 16:42, Bob Camp <kb8tq at n1k.org> wrote:
>> 
>> Hi
>> 
>> One might *think* a redundant system would work fine with the plug
yanked. 
>> In this case .. nope. It needs to have a dummy connector on it to get

>> the device running. I agree that this is an "interesting" way to do 
>> it. Regardless of that, they did the units need the signals from the 
>> other box (or fake signals)  before they will do useful stuff.
>> 
>> Bob
>> 
>> 
>>> On Sep 5, 2016, at 10:22 PM, Bill Hawkins <bill.iaxs at pobox.com>
wrote:
>>> 
>>> Fake connections? Isn't a redundant system supposed to allow one box

>>> to be disconnected?
>>> 
>>> Bill Hawkins
>>> 
>>> -----Original Message-----
>>> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob

>>> Camp
>>> Sent: Monday, September 05, 2016 8:20 PM
>>> To: Discussion of precise time and frequency measurement
>>> Subject: Re: [time-nuts] Lucent RFTFm-II-XO
>>> 
>>> Hi
>>> 
>>> If you only have one box, you need to be sure the "fake" connections

>>> on the interconnect are correct. If they are not, you will not get 
>>> it to operate correctly.
>>> 
>>> There also is a survey process if you have not had it running in 
>>> your location before. That could take a few hours to a few days 
>>> depending on your antenna.
>>> 
>>> Bob
>>> 
>>> 
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