[time-nuts] WWVB New Modulation scheme...

Chuck Forsberg WA7KGX N2469R caf at omen.com
Sat Oct 27 02:44:10 EDT 2012


On 10/26/2012 08:26 PM, Peter Gottlieb wrote:
> I've used the HP 3586 for measuring AM carrier frequencies as well as 
> my Tek 495P (both referenced to Rb) for higher frequencies such as air 
> band.
>
> Some carriers are dead nuts on while others are quite far off (at 
> least to my mind) although I've never found one outside of its 
> required tolerance.
>
> It seems possible to measure pretty accurately with these instruments, 
> at least on AM or CW signals, but not sure the best way for FM.  I've 
> played with the HP 53310A but haven't set it up for precise 
> measurements yet, or really studied what all it is capable of.
>
> Peter
>
>
> On 10/26/2012 11:10 PM, Orin Eman wrote:
>> Looks like they _might_ have been 30 _Hz_ out... I had to tune to 
>> 1188.97
>> to get a 1kHz beat in upper sideband mode a few minutes ago but they are
>> within 10Hz of where they are supposed to be now - according to my radio
>> anyway (I just checked the radio against WWV at 5MHz and it was less 
>> than
>> 10Hz out).
>>
>> Orin, KJ7HQ.
>>
>> On Fri, Oct 26, 2012 at 7:41 PM, Bob Camp <lists at rtty.us> wrote:
>>
>>> Hi
>>>
>>> Not to mention attention from the guy who *should* be 3 channels over …
>>>
>>> Bob
>>>
>>> On Oct 26, 2012, at 10:31 PM, Peter Gottlieb <nerd at verizon.net> wrote:
>>>
>>>> It would attract a lot of attention from people not finding it at the
>>> right place on the dial.
>>>> On 10/26/2012 10:09 PM, Max Robinson wrote:
>>>>> The frequency of 1190 indicates an AM station.  I assume you mean 30
>>> Hz.  An error of 30 KHz would attract a lot of attention from Charley.
>>>>> Regards.
>>>>>
>>>>> Max.  K 4 O DS.
>>>>>
>>>>> Email: max at maxsmusicplace.com
>>>>>
>>>>> Transistor site http://www.funwithtransistors.net
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>>>
>>>>> Music site: http://www.maxsmusicplace.com
>>>>>
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>>>>>
>>>>> ----- Original Message ----- From: "Chuck Forsberg WA7KGX N2469R" <
>>> caf at omen.com>
>>>>> To: "Discussion of precise time and frequency measurement" <
>>> time-nuts at febo.com>
>>>>> Sent: Friday, October 26, 2012 12:14 AM
>>>>> Subject: Re: [time-nuts] WWVB New Modulation scheme...
>>>>>
>>>>>
>>>>>> I have my 3586b slaved to my Thunderbolt along with a
>>>>>> Flex-1500 radio, Racal-Dana counter, Advantest Spectrum
>>>>>> analyzer and Gigatronics signal generator.
>>>>>>
>>>>>> You might be interested to know KEX 1190 in Portland
>>>>>> is about 30 kHz low.  At least they aren't spewing
>>>>>> IBOC lately.
>>>>>>
>>>>>> -- 
>>>>>> Chuck Forsberg WA7KGX N2469R     caf at omen.com www.omen.com
>>>>>> Developer of Industrial ZMODEM(Tm) for Embedded Applications
>>>>>>   Omen Technology Inc      "The High Reliability Software"
>>>>>> 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>
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>>
> 1189.9698  30 Hz low.  I was confused by Bush's 500 trillion tax cut.

WWV on 5 reads correct within 0.1 Hz on my CPS locked 3586b+

>
>
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-- 
Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430





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