Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON - RUNNING

To: <[email protected]>
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON - RUNNING NOW - 1615 HRS
From: "mal hamilton" <[email protected]>
Date: Sat, 3 Jan 2009 19:09:06 -0000
References: <285F98C95F064AA8B5B6C559814191EC@ns94d01ae4d850> <[email protected]> <[email protected]> <23CE077F929444939EDA62569064E6E9@AGB> <00f001c96d13$ed597980$0301a8c0@mal769a60aa920> <00cc01c96dbb$35785400$0301a8c0@mal769a60aa920> <F340D421FCD44134B8EA87627B9BB1F5@AGB> <00ba01c96dc1$88a85a20$6401a8c0@asus> <692151C1D69C47E4ADF8C184868FBF14@AGB> <018401c96dd1$6a78bda0$0301a8c0@mal769a60aa920> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]

You were telling us not so long ago that narrow band signals were preferable because of S/N, ie QRS 240 etc Frequency hopping is not wide band signals but narrow signals hopping around the band. Spread spectrum signals are not user friendly for other users in a restricted band.
You are also getting confused between LF/MF and V/UHF applications.
Make your mind up OM
G3KEV


----- Original Message ----- From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Saturday, January 03, 2009 6:38 PM
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON - RUNNING NOW - 1615 HRS


But have you thought about the power DENSITY.   Its a well known fact
that spreading a signal in frequency improves channel usage and
assists weak signalling - go back to Shannon's eqn.

Look at first GSM (which used frequency hopping to improve usage) then
3G with DSSS.   Also all the WLAN modes use frequency spreading.

Methinks you're behind the times thinking single carrier modulation.
Amateurs should move with teh times, not be stuck in the 1960's

Andy  G4JNT
www.g4jnt.com



2009/1/3 mal hamilton <[email protected]>:
Tonight another episode of transmissions taking up about 1 khz of spectrum
in a 3 khz allocation.
I think the time has come to ask OFCOM for their opinion. These are not
experimental transmissions,  just established modes generating QRM to the
rest of the 500 khz community and QRM GENERATORS, and not suitable for 500
khz.
The 500 khz band will SEFL DESTRUCT with this type of anti social behaviour.
I would not blame OFCOM if they pulled the plug.
and they do read these messages along with the RSGB coordinator.
G3KEV

----- Original Message ----- From: "Graham" <[email protected]>
To: <[email protected]>
Sent: Saturday, January 03, 2009 4:49 PM
Subject: Re: LF: RE: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON -
RUNNING NOW - 1615 HRS


Ok Gary,

Thats the first odd report hihi ...psk was not supposed to be better .......
! doesn't look well for decodes at range .. i will try and add a few more
watts ..

are you running  x 3 multipsk at once ? the beacon text is :-

CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbg  g0nbd  g0nbd  kkk

Tnx - G ..



--------------------------------------------------
From: "Gary - G4WGT" <[email protected]>
Sent: Saturday, January 03, 2009 4:37 PM
To: <[email protected]>
Subject: LF: RE: Olivia  8 x 250 / psk31 / MFSK 8  503 CENTER BEACON -
RUNNING NOW - 1615 HRS


Graham, LF,

OK all copied here at varying percentages.

MFSK8

CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbd  g0nbd  g0nbd  kkk ea dKt  tp r¢iúiik1kE Keonoe
x'!etiwB Faøoit"0iüTelt !cgneÊW¥ Dr gf ! la(  i:a ¾dõie.Yp  a.t¢ P
ntiae yt
rl k ¢gt s CDdo   bd
CQ CQ V) DE...g0abd   8(c)x  ag0nbd
CQ CQ CQ ..±tßnbd  g0n!d  g0nbw kkk Ä& Äjt  öÎ  E.xg0nbd  g0nbd  g0nbd
CQ CQ Jd t E...g0nbd yz0nbd C(c)oLQ CQ DE.n ki±ngS §/ g0P%iKhk er xu5ui
i¹a tyfbhttaq=  ihÄiod  elmha n n E¡tdi¢nbeeue NtotmâeNRxeca

PSK31

CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbg  g0nbd  g0nbd  kkk

Olivia 8 x 250

CQ CQ CQ DE...g0nbd  g0nbj<"g0nbd  kkk z34QU
@DK   CQ CQ CQ DE...g0nbd  g0nbd  g0nbd
CQ CQXs[ DE...g0nbd  g0nbd  g0nbd
CQ CQ CQ DE...g0nbd  g0nbd  g0nbd  kkk Q cY9L,'6   CQ CQ CQ DE...g0nbd
g0nbd  g0nbd
CQ CQ CQ DE...g0nbd  0}^)  g0nbd
CQ C1@#Q DE...g0nbd  g0nbd  g0nbd  kkk H1R7Y

73

Gary - G4WGT.




-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Graham
Sent: 03 January 2009 16:25
To: [email protected]
Subject: LF: Olivia 8 x 250 / psk31 / MFSK 8 503 CENTER BEACON - RUNNING
NOW
- 1615 HRS

Follow on from last night , As the olivia system transmits tones in
parallel

it requires a linear system,   however , MFSK is a single tone phase
continuous  system , I am using   three applications of  multipsk running
on

the same pc in beacon mode

8 tones are selected on the two modes  psk31 is added as a reference
signal
and is not expected to  print as reliably

All  3 modes are the same peak power level , set at the agc threshold ..
about 10 watts per system at the moment . there may be a small change in
level as each mode starts and stops , the differing beacon lengths' are
resulting in the tx windows slowly shuffling.

Note , the station is in continuous  TX due to  vox audio  drive levels
producing alc preventing the power levels to  be normalised

Running  3 mode beacon

Dial set   502 khz usb

1000 hz  center   olivia  8 x 250 hz

1250 hz   psk31

1500 hz  MFSK  8

Reports  welcome

Graham

G0NBD

Io83LK









No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.2/1872 - Release Date: 1/2/2009
13:10





--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.2/1872 - Release Date: 1/2/2009
1:10 PM






--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.2/1872 - Release Date: 1/2/2009 1:10 PM



<Prev in Thread] Current Thread [Next in Thread>