Fwd: Re: Tuesday night tech net

[Nan and Sandy Sanders]

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> > For Tuesday technical net we will  ask participants opinions of 
> the following question:
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>1. Quick Tutorial on Frequency Hopping
>Frequency hopping spread spectrum is a system where the carrier 
>frequency is changed many times
>a second. Both transmitter and receiver move in unison according to 
>a randomized channel plan.  If done
>right both narrowband "stationary" signals and the frequency hopping 
>signal receive little interference.  The
>FCC authorized this mode for use in some amateur radio bands but 
>with a restricted variety of randomized
>channel plans.
>
>In building a practical FH system there are multiple technical 
>problems that must be solved.  These include
>finding a common clock, synchronizing the start of a hopping 
>transmission,  generating the randomized
>channel plan to name a few.
>
>In this part of the Tuesday Tech net we will do a quick brief of 
>some approaches to these problems.
>
>2. What ever happened to Amateur Television?
>A decade ago amateur TV repeater could be found and there were even active
>amateur television round tables.   But, outside of enthusiasts 
>amateur TV has essentially
>disappeared.
>1.  How does amateur TV work?   How does it compare with current 
>digital television?
>2. Is there any room for a modern amateur TV and if so, how do you 
>think it would work?
>3. What kind of range, quality, etc do you think could be achieved 
>at a reasonable cost?
>4. Are there off the shelf equipment that can be used to build a 
>modern amateur TV station?
>5. What are the prospects of creating an amateur TV repeater?
>6. Multi-media communications, like Skype, are in vogue.  Should an 
>amateur TV incorporate additional media too?
>7. How would you envision a typical modern amateur TV station?  What 
>band, power, modulation,.etc would you use?
>
>3. A brief meeting with Andre K, Frank G and Hal F. took place after 
>last Saturday Taco for the purpose of
>coordinating improvements to the echo link signal into the amrad 
>repeater.   I will briefly say a few words on that
>effort.
>
>4. We will have a brief item on SDR news.
>
> > Tech Net meets every Tuesday (so far) at 8 PM  EST via 21/81 
> repeater in the NVA area or on echo link using
> > the W4CIA-R conference point.   Sandy WB5MMB is conference facilitator
> >