[digitalradio] Re: ROS carrier pattern when idle

[silversmj]

Hey, TU Skip KH6TY for your time and the pic.

Wow, I don't see and random-ness to Chip64 yet it is DSSS.

Jose has posted/published Technical Spec for ROS if you care to look:
http://rosmodem.wordpress.com/

Best 73 de Mike KB6WFC

Re: [digitalradio] Re: ROS carrier pattern when idle

[KH6TY]

Mike,

I have uploaded the comparison you requested for ROS (16 baud this time 
for better comparison overall) compared to CHIP64, both idling:


http://home.comcast.net/~hteller/ROS16vsChip64.jpg

It is hard to see what happens when you send data in CHIP64 as the 
signal looks a lot like noise, but you can definitely ascertain a fixed 
pattern in the noise at idle. I can't spot any repetitive pattern in 
ROS, even at 16 baud. Perhaps you can. When you send data, it is hard to 
see any change in CHIP64. From the image, it looks like the spreading in 
CHIP64 is by a fixed pattern, and perhaps the data modulates the fixed 
carriers. Anyway, I have not seen the technical description, so I don't 
know. I'll leave it to you to more accurately interpret the images. I 
had to use MultiPSK instead of DigiPan this time to get better detail 
regarding amplitude with corresponding colors.


73 - Skip KH6TY




silversmj wrote:
 


Hey Skip KH6TY,

Could you show us a pic of Chip64 (your choice to compare it to ROS)?

Have a look at the links on my message 34845:
http://groups.yahoo.com/group/digitalradio/message/34845 



The author of Chip64 uses DSSS but in a much narrow BW than ROS. How 
it works is very nicely disclosed.


Since your currently closer (according to QRZ) to the ARRL VA Section 
NTS than I, perhaps you could listen for the Virginia Digital Net 
(VDN) 1915 Eastern M-F 3578.5 kHz who advertises/promotes using Chip64.


I appreciate all that you and the author of ROS have done for amateur 
radio.


Kind 73 de Mike KB6WFC

[digitalradio] Re: ROS carrier pattern when idle

[silversmj]

Hey Skip KH6TY,

Could you show us a pic of Chip64 (your choice to compare it to ROS)?

Have a look at the links on my message 34845:
http://groups.yahoo.com/group/digitalradio/message/34845

The author of Chip64 uses DSSS but in a much narrow BW than ROS.  How it works 
is very nicely disclosed.

Since your currently closer (according to QRZ) to the ARRL VA Section NTS than 
I, perhaps you could listen for the Virginia Digital Net (VDN) 1915 Eastern M-F 
3578.5 kHz who advertises/promotes using Chip64.

I appreciate all that you and the author of ROS have done for amateur radio.

Kind 73 de Mike KB6WFC

[digitalradio] Re: ROS carrier pattern when idle

[graham787]

May be they  can drive over the  boarder to  Canada or Mexico and  work ROS / P 
 ? I thought  prohibition had been abandoned over there and Edgar had been 
outed . some things just don't change .. makes the  9 khz discussion on this  
side look quite  tame ! G .. 

Keep going Jose .. 

--- In digitalradio@yahoogroups.com, Dave Ackrill  wrote:
>
> jose alberto nieto ros wrote:
> > KH, are you a Ham Radio or a FCC member?
> > 
> > If you are Ham Radio you should waste your time in help new modes would be 
> > used. Only a fool throws stones at your own roof. So, if you are not a FCC 
> > member, then we know what you are.
> 
> Jose,
> 
> I should give up on this discussion if I were you.  The genie is out of 
> the bottle and you wont be able to get it back in on this forum, 
> whatever the technical arguments are.
> 
> My advice would be to forget the debate, let those in the USA sort out 
> their own administration problems by *them* petitioning the ARRL and/or 
> the FCC (not sure which way round it has to go) if they want to use the 
> mode.
> 
> If I were you I'd just concentrate efforts on developing the program and 
> let those of us that are fortunate that we don't live in the USA use and 
> develop the mode.
> 
> Dave (G0DJA)
>