And Larry seems to think that radio has to be tuned to 70 to receive DSC calls.
It doesn't. It scans 70, as nearly as I can tell, no matter what you do. It least my
SH Spectrum does, as does a buddy's more recent SH, and another buddy's
Icom.


"ted" wrote in message news

"Larry" wrote in message ...
"Ted" wrote in
. net:

When the two systems are merged
the AIS display will let you pick the ship you want to talk to and
call only him using DSC. Everyone else will not have to listen to
your conversation.


That's true if you stay on Channel 70 and don't listen to 16 or the other
CB channels...68, 69, 71, 72, 10, 12, 13....(c;


I'm not sure why they dont implement DSC on all VHF marine channels. Maybe they will in the future after it is proven on channel
70. Do the current DSC capable radios allow you to use DSC on channels other than 70??

On Fri, 24 Feb 2006 21:01:32 -0800, "Chuck Tribolet"
wrote:

And Larry seems to think that radio has to be tuned to 70 to receive DSC calls.
It doesn't. It scans 70, as nearly as I can tell, no matter what you do. It least my
SH Spectrum does, as does a buddy's more recent SH, and another buddy's
Icom.


The SC-101 class radios allow the user to disable the channel 70 scan,
effectively disabling DSC reception. My brother-in-law's new Icom 502
came set that way - confused us when I tried some DSC tests with him -
his older, cheaper Icom could receive my calls regardless of the
selected channel, but the new expensive unit had to be set to 70. (He
discovered this setting while reading the book later in the day, after
we'd left our boats - we assume that DSC reception will work as
expected once he enables the Ch70 scan)


--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

In article ,
"Chuck Tribolet" wrote:

And Larry seems to think that radio has to be tuned to 70 to receive DSC
calls.
It doesn't. It scans 70, as nearly as I can tell, no matter what you do. It
least my
SH Spectrum does, as does a buddy's more recent SH, and another buddy's
Icom.


I think that you should qualify your above statement, a bit. You should
state that, "Your radio receiver scans VHF Marine Ch 70 while it is not
transmitting, and you think your buddies radios do as well". There are
a lot of DSC Equiped radios that may or may not, scan VHF Marine Ch 70,
or may or may not have a dedicated Ch 70 Receiver builtin. Just how
each model radio's Scan Routine is implimented by the OEM is propritary,
and problematic, to how it responds to a DSC Signal. There are some
radios that don't receive on CH 70, while the receiver is receiving a
signal on the programed channel, and some that don't recieve on Ch 70
while the radio is on Ch 16.
DSC in the Western Hemisphere is still mostly under implimented, and
untill the USCG, and other Governmental Entities, catch up with their
European Counterparts, the OEM's aren't really going to get the Consumer
Type Radios up to dealing with DSC with a full implimentation.

Bruce in alaska
--
add a 2 before @