New members
K7JBQ DRCC # 1591 , Bill ( http://www.qrz.com/k7jbq)
and
N9RG DRCC# 1592 ,Roy . (http://www.qrz.com/n9rg)
Weird, nothing I have heard before.
Andy.
On Nov 12, 2007 12:07 AM, Leigh L. Klotz, Jr. [EMAIL PROTECTED] wrote:
I heard a weird whooping sound, about 1Hz and ranging from 14.069.8 to
14.070.4.
It changed to about half that width and twice that speed just before
0500Z for a few
Starting this next Saturday and Sunday, Nov 17 and 18, we will have
digital SSTV on 40 meters 7.177 starting at 8am CDT or 9am EDT.
This is so some of the generals can join us with digital Pic's.
We will be using EZPal with rs1 encoding. The purpose of this group is
to Help people set up and use
Hi All,
Most likely a little off topic, but it is still to do with Digital Radio.
With the advent of Digital TV, I am surprised that there has not been more work
done on the Broadcast side for normal radio.
I would of thought that this would of been easier to implement and install,
don't have
In the U.S. the FCC has approved a system called IBOC (In-Band On Channel) to
add digitial audio to existing AM and FM stations. In broadcast radio, there
isn't the luxury of unused channels that allow every station to have one analog
and one digital transmitter. I haven't seen any terrestrial
There are several broadcast stations in my local area that are
digital, one local shop sells receivers. The content is fairly poor
at the moment, each stations carries their existing FM or medium wave
stations and then the extra channels are a syndicated radio service
offering themes like Jazz,
This has been going on for over 25 years that I know of.
But I don't think it was digital. AM and FM radio had a
service for the blind that was a sub carrier. Sounds very
close to it.
At 06:29 PM 11/12/2007, you wrote:
In the U.S. the FCC has approved a system called IBOC (In-Band On Channel)
We now have 2591 subscribers,
Welcome to the newest...
VE3DDY DRCC# 1593Jim ( http://www.qrz.com/ve3ddy) a 2M simplex
chip-shot across Lake Erie from me.
W6DLF DRCC# 1594Dave(http://www.qrz.com/w6dlf_
N6IEF DRCC# 1595 (http://www.qrz.com/w6dlf)
Andy K3UK
Owner.
IBOC is a method whereby both analog and digital signals are transmitted on
the same frequency.
Additional digital subcarriers are carried on the normal AM or FM analog
signal. They extend beyond the normal
channel bandwidth though so there is an increased chance of adjacent channel
interference.
The SCA (Subsidiary Communications Authority) was a sub-carrier quite a
distance from the main carrier and was not detected by the standard FM
receiver. The audio quality was very low. I think the maximum was only
8000 Hz or something relatively modest but worked well for speech.
The IBOC (In
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