El 03/02/2010 21:24, hank smith escribió:
how?
----- Original Message -----
*From:* Bob Camp <mailto:[email protected]>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Wednesday, February 03, 2010 5:10 PM
*Subject:* Re: [soft_radio] going to test my sdr with shortwave
time clock need some help
Hi
One of the nice things about SDR is that it's practical to
receive *both* the Russian and US stations at the same time. Very
cool ....
Bob
On Feb 3, 2010, at 9:38 AM, Alberto I2PHD wrote:
On 2/3/2010 1:03 AM, Bob Camp wrote:
/Assuming you are in the US, the stations the most useful
stations will be 5, 10, and 15 MHz from WWV.
They also transmit on 2.5 and 20 MHz. They transmit AM voice
along with various beeps and stuff. /
And if you are in Europe you could take advantage from the
Russian stations RWN, located at 4,996 kHz, 9,996 kHz and 14,996 kHz.
They alternate periods with one-second clicks with periods of
silence, with periods with 1/10th of a second clicks.
And depending on the hour and the propagation maybe you are able
to receive one or another or all three of them.
They have the customary Caesium precision, accuracy and stability.
73 Alberto I2PHD
If you tune your LO in between both, say, 14998 for WWV/WWVH and RWN on
14996...
That's one way that comes to my mind. Another is that tuning to a side
you have both on the spectrum, separated by 4 kHz.
Not too good for requency reference, but might allow to compare time
standards and propagation delay.
73,
Jose, CO2JA
PS: You guys are fortunate "in the middle of the world" emerged land,
you can enjoy fairly good signals from both east and west. On this side
of the world, the Pacific Ocean is too wide to the west to hear much
with so bad propagation nowadays.
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