Subject:
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Re: Automatic Gain Control
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 3 Jan 1999 21:18:02 GMT
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Original-From:
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B van Dam <BVANDAM@WESTBRABANT.stopspammersNET>
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Viewed:
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1123 times
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Here's Anders Isaksson's anwer to the automatic gain control question. He
emailed it to me directly but gave permission to post it, since I don't
think many people know this:
> Could it be that the AGC value is a measure for the distance between the
> tower and the Cybermaster? Would the data you have gathered support this?
No, I would say definitely not. To me it seems like the tower increases the
power when it has to retransmit, and tries to lower the power when
everything works. So the reading is only connected to 'connection quality' I
think. We had the highest reading with a short distance (3m) but the toilet
(pipes and water) was between the tower and the MU. Going upstairs to the
other end of the house lowered the reading again (and moving the MU just
near the tower showed the lowest reading).
> By the way, can you get _out of the house_ with the tower inside and still • control
> the Cybermaster??
Well, we weren't actually outside, but we could go anywhere in the house
(haven't tested the basement). But my house is old - only wood and such
materials in the walls.
Anders Isaksson, Sweden
BlockCAD: http://user.tninet.se/~hbh828t/proglego.htm
Gallery: http://user.tninet.se/~hbh828t/gallery.htm
Visit my site on Lego, Robot's and Visual Basic at
http://home.concepts.nl/~bvandam/index.html
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 4 Replies:
 | | Re: Automatic Gain Control
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| (...) I'm pretty sure I can if I leave the tower near the window, although I live in an apartment and that's a tricky test. Anyway, I can control mine across the house (15/20 meters distance). Also, one thing I noticed is that the error correction (...) (25 years ago, 3-Jan-99, to lugnet.robotics)
| | | Re: Automatic Gain Control
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| (...) I remembered once something Dave told me: AGC is unsafe if used inside NQCC. His words: ---...--- The AGC() macro is the only one to use a 5 bit selector code (0x10). For many instructions (such as tests), the selector code must be fit into 4 (...) (25 years ago, 3-Jan-99, to lugnet.robotics)
| | | Re: Automatic Gain Control
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| (...) Using the AGC to meassure the distance works fine with my CM. Values returned by function AGC: 0 m: 50 - 110 1 m: 600 - 650 The values may vary a bit, but I think that the tower increases the power the further away the CM gets. -Ole -- Did you (...) (25 years ago, 3-Jan-99, to lugnet.robotics)
| | | Expansion sets
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| I am going to write some WWW material on expansion sets, including Dacta, spares, RIS expansion sets and normal shop sets. Firstly, does anyone out there know what is in the various Dacta sets - eg. Computer Control Models, Amusement Park etc - in (...) (25 years ago, 11-Feb-99, to lugnet.robotics)
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