Re: LZ: RT-Link: Has anybody gotten it to work?
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Re: LZ: RT-Link: Has anybody gotten it to work?
On Tue, 15 Oct 1996, Mel Tsai wrote:
> Yeah, I think you're right. I didn't realize that it uses two
> different IR pairs.
>
> -Mel
I think it's a half-duplex single freq. system. Consider this...
tx=600 nm \__hypothetically
rx=500 nm /
generally a semiconductor junction works +/- 50nm, so even on a lucky day
when you're transmitting 550 and receiving 550 you'd be so far out on the
edges of a power spectrum that you'd never get anything done. Also, if HP
made their calcs tx and rx on different frequencies, you have only a 50%
chance of being able to send something.
Half duplex would be nearly the only solution in this case, or token
ring... only one calc trying to talk at any given time, guaranteed. but
if you pass the token fast enough (<75 ms), it looks like simultaneous
access.
<pre>
--
Chris Kuethe <ckuethe@gpu.srv.ualberta.ca> LPGV Electronics and Controls
RSA in 3 lines of PERL:
#!/bin/perl -sp0777i<X+d*lMLa^*lN%0]dsXx++lMlN/dsM0<j]dsj
$/=unpack('H*',$_);$_=`echo 16dio\U$k"SK$/SM$n\EsN0p[lN*1
lK[d2%Sa2/d0$^Ixp"|dc`;s/\W//g;$_=pack('H*',/((..)*)$/)
</pre>
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