[time-nuts] New to list

Bob Camp lists at rtty.us
Thu Nov 1 17:31:59 UTC 2012


Hi

Based on a quick look - the CME8000 isn't going to be much of a help with
the new modulation. It will do ok with the old AM format.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mike Harpe
Sent: Thursday, November 01, 2012 1:14 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] New to list

Hi!

At this point I'm mostly just trying to learn about the new signal. I
play around with microcontrollers and have always wanted to build a
WWVB clock. I spent a good amount of time with the CME-8000 board
before getting frustrated with it and putting it aside for awhile. I
found out about the BPSK experiment when I was looking around for help
with the CME-8000 and I figured that would be the way to go now.

Mike Harpe

On Thu, Nov 1, 2012 at 1:08 PM, paul swed <paulswedb at gmail.com> wrote:
> Mike
> Welcome to the list. There have been numbers of tests since March.
> Ultimately a more detailed specification was released thats been helpful
in
> understanding the new modulation.
> In various threads I have mentioned what I have been doing. At the moment
> modifying a spectracom 8163 seems to be a way to allow other rcvrs to
work.
> Not at all optimum or even close. But at least seems to have worked.
> I am semi familiar with the chips and they are a complete rcvr. But really
> do not allow direct access to the signals easily. Either you grab it past
> the 60Khz crystal or at the output of the diode detector by removing the
> LPF cap. Then you have to amplify detect and feed that back for AGC.
> Something that can be done. I have not had time.
> So a question for you is what are you attempting to do?
> Regards
> Paul
> WB8TSL
>
> On Thu, Nov 1, 2012 at 12:43 PM, Mike Harpe <mike at mikeharpe.com> wrote:
>
>> Sorry if this is an FAQ...
>>
>> Has anything else happened with the WWVB BPSK change since the test in
>> March?
>>
>> Also, I would love to correspond with anyone who has worked with the
>> C-MAX CME-8000 boards.
>>
>> Thanks! I'm looking forward to participating.
>>
>> Mike Harpe, N4PLE
>> Sellersburg, IN USA
>>
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