[time-nuts] Lucent RFTFm-II-XO
kb8tq at n1k.org
Wed Sep 14 07:12:55 EDT 2016
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).
> On Sep 13, 2016, at 11:44 PM, Chris Waldrup <kd4pbj at gmail.com> wrote:
> 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.
>> On Sep 6, 2016, at 16:42, Bob Camp <kb8tq at n1k.org> wrote:
>> 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.
>>> 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
>>> Sent: Monday, September 05, 2016 8:20 PM
>>> To: Discussion of precise time and frequency measurement
>>> Subject: Re: [time-nuts] Lucent RFTFm-II-XO
>>> 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.
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