ARLA/CLUSTER: Problema nos Indicativos para o D-STAR em Gateway e "Circular Polarization for D-Star Repeater Antenna" .

[João Gonçalves Costa]

Prezados Colegas,

Existe um problema na configuração dos indicativos dos Repetidores D-STAR, em especial no caso da utilização da Gateway de acesso á Internet, que não permite a utilização de mais de 8 caracteres.

Deixo-vos alguns mails trocado com o colega John D Hays(K7VE) sobre a sua solução proposta e alguns exemplos de configurações.

Chamo também a vossa atenção, neste caso aos utilizadores do sistema D-STAR, sobre este tópico "Circular Polarization for D-Star Repeater Antenna" em: http://www.qsl.net/n9zia/cir_pol_rpt.html como uma possível solução para um dos maiores problemas apontados ao sistema, no caso do "multipath" dos sinais, em especial em ambientes urbanos. Neste artigo, disponível em: http://www.arrl.org/qst/2007/08/monteiro.pdf o colega Anthony "Tony" Monteiro (AA2TX) descreve uma antena simples para 2m mas adaptável, tendo em atenção as medidas (dividir por 3)para os 70cm para obviar este problema.

On 11/23/07, John D. Hays <john  hays.org> wrote:

Perhaps ICP-ANACOM would adopt the format used by convention in DSTAR.

The 8th position in the callsign is, by convention:

A on 23CM
B on 70CM
C on 2M

Then the callsign would appear as:

23CM - CQ0DFO A  (the space is significant, the A must be in the 8th position)
70CM - CQ0DFO B
2M - CQ0DFO C
GATEWAY - CQ0DFO G (will ICP-ANACOM permit the Internet Gateway to link repeaters?)

Then on DSTAR, if I want to call CQ from the Utah DSTAR gateway to the Fóia UHF repeater, I would set up my radio callsigns as follows:

UR /CQ0DFOB
MY K7VE
RPT1 KF6RAL B  (Utah UHF Repeater)
RPT2 KF6RAL G (Utah Gateway)

If I wished to call your specific station

UR CT1FBF
MY K7VE
RPT1 KF6RAL B
RPT2 KF6RAL G

If you wished to call my specific station

UR K7VE
MY CT1FBF
RPT1 CQ0DFO B
RPT2 CQ0DFO G

If you wished to call CQ to the Utah UHF Repeater (Salt Lake City)

UR /KF6RALB
MY CT1FBF
RPT1 CQ0DFO B
RPT2 CQ0DFO G

Perhaps this information will help.

Kindest Regards,
-- DE K7VE, John
http://k7ve.ampr.org


On 11/23/07, João Gonçalves Costa < joao.a.costa  ctt.pt> wrote:
Hi John (K7VE),

Thanks for your advice, but the portuguese FCC (ICP-ANACOM) they had composed the Call Sign of the following form:

Prefix: CQ0(zero)- fix to all portuguese amateur repeaters.

Suffix:U(in UHF Band) D (from Digital) and FO (from Fóia, the name of local place)

More shorter call sign is difficult, perhaps in the future it is possible composed the call sign without the "U" or the "FO" from the name.

I believe that most easy it without two letter in the name.

Many Thanks from your advice and i go send your explanation in portuguese to ANACOM.

Best Regards.

João Costa
CT1FBF
-----Original Message-----
From: notify  yahoogroups.com [mailto: notify  yahoogroups.com] On Behalf Of k7ve
Sent: sexta-feira, 23 de Novembro de 2007 16:03
To: João Gonçalves Costa
Subject: Re: New D-Star Repeater goes on Test in Algarve/Portugal on next December.

--- In dstar_digital  yahoogroups.com, Jo�o Gon�alves Costa < joao.a.costa  ...> wrote:
>
>

>
> Call Sign: CQ0UDFO
>

Joao,

Congratulations -- However, you must get a shorter call sign to be effective on D-STAR (especially in gateway mode) -- 6 characters or less.

Here is why:

There are 8 characters available for call sign ... the 8th character is reserved for a designator (in the case of your repeater the convention is 'B', so the repeater would be CQ0UDFOB).  This leaves 7 characters.  In some modes of operation, for example calling CQ through a remote repeater, the first character is  "/" so this would mean in your case /CQ0UDFOB or 9 characters.

It is better to make this change now rather than later. Perhaps an explanation to your licensing body will help.

-- John, K7VE