[time-nuts] Lucent RFTFm-II-XO

Chris Waldrup kd4pbj at gmail.com
Wed Sep 21 23:54:26 EDT 2016


Hi,

The USB to RS422 adapter arrived.  According to the online manual for the adapter, the RS422 signals I'm looking for are:
Send A+
Send B-
Receive A+
Receive B-

Is there a pinout posted somewhere  for the Lucent box RS422 D sub 9 connector?

Thank you. 

Chris
KD4PBJ

> On Sep 14, 2016, at 06:12, Bob Camp <kb8tq at n1k.org> wrote:
> 
> 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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