[TenTec] Some questions about Omni VII remote IP streaming mechanism
david feldman
wb0gaz at hotmail.com
Sun Mar 25 12:10:31 EDT 2007
Downloaded and leafed through the programmers reference manual and have some
questions about Omni VII remote IP streaming "RIP and TRIP". I haven't
looked at the remote GUI code...
1. Is the audio encoding compressed or PCM with 16-bit samples or other? Is
the codec conversion from audio to data linear or is there a "u-Law/a-Law"
type curve involved? Are the sample big-endian or little-endian?
2. What is the audio sampling rate (therefore the approximate data rate for
audio)? Is the sampling rate fixed or does it vary depending on the needed
audio bandwidth in the receiver-to-remote link?
3. Is there a specification for sending CW at the "dit/dah" level vs.
sending ASCII characters from a keyboard (ten-tec brochure talks about a USB
CW interface but I couldn't find mention of that in the programmer's spec)?
4. Is there any buffering delay to smooth out packet arrival timing? Is
there a link delay/latency budget or is link delay limited to some maximum
time and/or jitter?
Trying to get a handle on whether this system might "play" through a
cellular wireless (I'm thinking Verizon EVDO because that's what I use)
link, which has ~250 mSec latency and might make for some interesting
(cellular)wireless to (amateur)wireless applications...
Very tks,
73 Dave WB0GAZ wb0gaz at hotmail.com
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