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Tu Uwe,
I can only make 0.1Hz steps ,
Henny pa3cpm
best 73's
----- Original Message -----
Sent: Thursday, March 10, 2011 4:59
PM
Subject: Re: Re: Re: LF: GRABBER
Hi
all,
I fiddled about finding a somewhat better qrg.
the result
is:
now dj8wx is transmitting on 8970,0177Hz.
best
regards
Uwe/dj8wx
Von: [email protected]
Gesendet:
10.03.2011 16:24
An: [email protected]
Betreff:
Re: Re: LF: GRABBER
Hi Stefan, hi
Henny,
Stefan, part of your question has been answered by Paul
Nichelson.
pse see:
http://tech.groups.yahoo.com/group/VLF_Group/message/17456
the reference is a GPS
diciplined 10MHz signal.
no divider in use. the
accurate sine wave is generated by the high speed microcontroller
AT90S2313followed by a R matrixc and a lowpass filter cutqrg
10kHz.
the phase is GPS sychronized.
the time is locked to GPS 1pps.
negative: the resolution (step
size) is 0,3mHz (32-bit). theoretically. really: 63xmHz. the eeprom doesnt
take any notice of the last two signs of the HEX group. so it can
generate near 8970,000Hz: 8970,022xHz or 8969,959xHz.
best regards
Uwe/dj8wx
Von:
[email protected]
Gesendet: 10.03.2011 13:42
An:
[email protected]
Betreff: Re: LF: GRABBER
Hello Henny, Uwe,
VLF,
Ah, you've already seen it ;-)
I just wanted to post that i
have splitted my 60000 window. Now the range arround 8970.000 +- 4 uHz and
8970.020...8970.025 is visible.
Since it has stored the last 10 days or so
in the buffer, DJ8WX's transmission of last week is now visible in 47 uHz as
well.
Uwe, what is the exact frequency on which you are transmitting?
What is the original reference frequency and what is the divider
ratio?
May there be a conflict with Hennys transmission? Now we are in
a range where it is important to know the frequency to a uHz! If i look at
Victor's spectrogram, it looks Henny is slightly below 8970.022 Hz, maybe 0.2
mHz. But this may be not enough to make out the difference (?) Oh, i just
looked at the spectrogram and see a faint trace at 8970.0217 Hz. Is it you,
Henny? It's still to much guesswork but a first step on the way to a proper
ID. 3 dB QRO would be a good way to check that :-)
73,
Stefan/DK7FC
Am 10.03.2011 13:11, schrieb henny van elst:
Hi
Stefan,
tu for the
60000grabber,
i will keep the tx
on,
henny
pa3cpm
best 73's to
All.
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