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Guess what Stefan meant is the center
frequency of his transmission, HF-wise.
And that's less ubiquitous than this 'dial'-thing, because the
combination of the 'dial frequency' and 'audio frequency' is
irrelevant. Only the sum of both is relevant.
Example:
When tuning to 136.0 kHz "dial" in USB on an analog HF
transceiver, plus 1420 Hz audio, the RX covers a range of 136300
to 139700 Hz (assuming the typical 300 to 2700 Hz pass). Assume
there is a powerful transmitter near 139 kHz .. anyone close to
that transmitter (wink, wink..) will prefer to tune his RX to, for
example, 135.0 kHz "USB dial" and use 2420 Hz audio center
frequency (assuming a sufficiently configurable software).
Thus the center frequency of the real transmission (137.42 kHz) is
all one needs to know.
All the best,
Wolf .
Am 18.11.2012 16:47, schrieb Graham:
S,,
If jt9 is a multi tone (mfsk) system , as is wspr ,
then which tone are you declaring the frequency of ?
better to use the dial convention ,
Then everyone has the same (suppressed) carrier frequency
and what ever audio offset will be unified
G) ..
Sent: Friday, November 16, 2012 9:50 PM
Subject: Re: LF: RXing JT9-2
Hi Mauro,
I'm on 137.42 kHz (i always tell the TX frequency), yes JT9-2.
73, Stefan
Am 16.11.2012 22:42, schrieb IK1WVQ Mauro:
Hi Stefan,
are you trasmitting now ???
137 dial + xxxx ????
JT9-2 ????
I am trying to receive you .
73
Mauro IK1WVQ
At 22.30 16/11/12, you wrote:
Thanks Halldór!
Spiros, did you decode the 21:08 and 21:12 transmissions? Is
there someone else watching?
73, Stefan/DK7FC
Am 16.11.2012 22:19, schrieb Halldór:
Stefan,
Not very consistent series from me. I am saving all if
someone is interested.
2100 4 -25 0.7 1423.0 0.00 DK7FC JN49IK
2102 0 -31 0.3 1429.1 0.00
2104 3 -25 0.9 1423.0 0.00 DK7FC JN49IK
2106 0 -32 -2.1 1421.1 0.00
2108 5 -23 1.1 1423.0 0.00
2110 0 -32 -1.3 1429.9 0.00
2112 4 -24 0.0 1423.0 0.00
73
Halldór
TF3HZ
From: [email protected]
[
mailto:[email protected]] On
Behalf Of Stefan Schäfer
Sent: 16. nóvember 2012 20:53
To: [email protected]
Subject: Re: LF: RXing JT9-2
Thanks Spiros,
That looks consistent, you're loosing no single
transmission.
The reports look reasonable as well.
Tnx, 73, Stefan
Am 16.11.2012 21:47, schrieb SV8CS- Spiros Chimarios:
JT9-2 on 136 Khz
· 2020 10 -14 0.5 1420.3 0.00 DK7FC
JN49IK
· 2022 2 -36 -2.4 1370.0 0.00
· 2024 10 -21 0.4 1420.3 0.00 DK7FC
JN49IK
· 2026 0 -39 2.4 1402.2 0.00
· 2028 10 -17 0.5 1420.3 0.00 DK7FC
JN49IK
· 2030 0 -33 -0.6 1408.9 0.00
· 2032 10 -12 0.5 1420.3 0.00 DK7FC
JN49IK
· 2034 1 -37 0.8 1426.8 0.00
· 2036 10 -10 0.3 1420.3 0.00 DK7FC
JN49IK
· 2038 0 -35 -1.0 1436.5 0.00
· 2040 10 -16 0.4 1420.3 0.00 DK7FC
JN49IK
· 2042 0 -30 0.1 1426.8 0.00
· 2044 10 -13 0.3 1420.3 0.00 DK7FC
JN49IK
73, Spiros
SV8CS
Nessun virus nel messaggio in arrivo.
Controllato da AVG - www.avg.com
Versione: 9.0.930 / Database dei virus: 2441.1.1/5398 - Data
di rilascio: 11/16/12 10:50:00
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