[NSRCA-discussion] SD-10

[John Gayer]

I'm curious about the stick inputs. I believe the manufacturers are all 
still using pots, so they must have an A/D converter for each stick 
input in order to input the data into the processor. Most of the 
converters are less than 11 bits and even then the least significant 
bits are noisy. If you can get 8 solid bits of data you are doing well.
Unless the manufacturers are doing something very special, it appears to 
me that the stick inputs will be the limiting factor for resolution.

John

James Oddino wrote:
> What is the frame rate and the servo update rate?
>
> Jim O
>
>
> On Aug 25, 2009, at 2:12 PM, Bob Richards wrote:
>
>> RE: Stick centering. The Hitec servo programmers can read the pulse 
>> width down to 1us I believe. Plug it into a receiver output and put 
>> it in the right mode and it will display the pulse width.
>>  
>> RE: Latency comparisons, pullled this from the web:
>>  
>>
>>     These latency findings were taken using carefully contructed and
>>     consistent methods to ensure they are as accurate as possible. As
>>     of May 2009
>>
>>     Airtronics SD-10G:
>>     Min: 7.36ms
>>     Max: 16.3ms
>>     Ave: 11.83ms
>>
>>     Futaba 10C (Futaba is a Trademark of Futaba Corporation and Dist
>>     by Great Planes):
>>     Min: 9ms
>>     Max: 29ms
>>     Ave: 19ms
>>
>>     JR 9303 & R1221rx (JR is a Trademark of JR Radios Japan and Dist
>>     by Horizon Hobby)
>>     Min: 25ms
>>     Max: 47ms
>>     Ave: 36ms
>>
>>     JR 12X
>>     Min: 21.5ms
>>     Max: 43.5ms
>>     Ave: 32.5ms
>>
>> Of course, this was in an ad for Airtronics. ;-)
>>
>>  
>>
>> Bob R.
>>
>>  
>>
>>
>>  
>>
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