On Jun 5, 2007, at 9:17 AM, Simon Brown (HB9DRV) wrote:
My current digital software project is DM780 - some screenshots
here: http://gallery.ham-radio.ch/main.php?g2_itemId=9832
I will write a remote agent which sends the digital data over the
network, the UI will select the agent instead of the soundcard.
Sounds pretty interesting. Care to share more about the protocols?
Just another comment. One of the things that made the Internet
successful was to standardize on the protocols going over the wire
rather than standardize on the software. That means that anyone can
write software to implement the protocol and be compatible with
everyone else.
To be quite frank, I would probably opt to use SNMP to provide
control and monitoring of the devices in my shack. It is a standard
so there is a lot of code already available to use. We would just
need to cook up the ham-shack MIB (management information base) to
include objects like:
antenna
operating frequency upper bound
operating frequency lower bound
azimuth
elevation
Rig
transmit frequency
receive frequency
passband upper bound
passband lower bound
input selection
transmitter on/off
etc.
It provides for gets (read) and sets (write). Some parameters are
read-only. Others are read/write.
We also need something standardized for the transmission of AF and IF
data over the network. This requires more thought as we are
addressing layering. I have protocols for the physical layer
(modulation, control), link layer, etc. Splitting functionality
between rig and computer is going to be more of a challenge but
certainly doable.
I have been out of this scene for a *LONG* time. Perhaps someone can
tell me if anyone has addressed this in the TAPR/AMRAD digital
conference? (Lyle?)
Simon Brown, HB9DRV
----- Original Message ----- From: "Brian Lloyd" <brian-
[EMAIL PROTECTED]>
This is an excellent point. Imagine I am using a digital mode with
a K3. The K3 performs all modulation and demodulation in DSP,
i.e. in a computer. Does it make sense to generate a signal
digitally in my PC, convert it to analog, transfer it to the K3
which converts it to digital, translates it to the first IF
digitally, and then converts it back to analog again?
73 de Brian, WB6RQN
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com
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