[Elecraft] Re: radios on networks

[Brian Lloyd]

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- 
> wb6rqn at lloyd.com>
>
>>
>> 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