[amsat-bb] request detailed system diagram for remoting a satellite station

[David J. Schmocker]

Hello,

Does anyone have a detailed system diagram (or interconnect drawing) 
showing how they have remoted a satellite station please?   Specifically 
which parts of the system require IP-addressable power on/off, etc.


I am in the process of constructing a new satellite station for U/V 
linear use at Milwaukee Area Technical College (where I teach).   Our 
Data Communication and Networking class introduces satellite technology 
which I plan to demonstrate live.

Because the hours of access to the building are limited, and because we 
teach Data Communication and Networking from two campuses (but have 
Satellite station at only one), remoting this station would be desirable.

I have an APC IP-addressable power strip (117vac) and some power relays 
if we need 220vac switched, an IC-9700, two high-power switchable LNAs 
(2m and 70cm), antennas (20 element RHCP for 2m and 16 Turn G3RUH Helix 
for 70cm), and a Yaesu 5500 rotor with Green Heron Az/El controller 
(I'll bring Heliax from home to get to the rooftop).   Hopefully our 
city campus location is not overly noisy.      I plan to construct the 
HEO-ready station as soon as I can be back on campus to do this.

One specific area of concern: how to pass audio over internet. I've 
heard Skype and some other vehicles have problematic latency but I have 
yet to remote any station to use 'near real-time audio' for CW or SSB 
QSOs so I lack experience with this.  The satellite computer 
(controlling antennas and managing Doppler) is a Mac mini running 
MacLoggerDX and MacDoppler software.

If helpful, I have two surplus new Raspberry Pi 3s (new and unused) that 
could be repurposed for part of this if helpful.

You'll be happy to know I've been reading the mail and I know to first 
listen and test so we Tx with minimum power.  But as a satellite newby, 
I'm sure I'll need abundant guidance when we get QRV.

Any detailed system diagrams (could be off-list directly to me) showing 
how you built and configured such a remote station satellite system 
would be greatly appreciated.

Thank you

very 73,

Dave KJ9I
KD9BOG (at work)