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
>
>
>
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