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annotate doc/TI-docs @ 128:623340e2c475

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author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 25 Dec 2019 05:27:25 +0000
parents 131abadbd74d
children
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131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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1 We don't have a TI calibration document that exactly matches the
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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2 Calypso+Iota+Rita chipset we are working with, but we do have two different
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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3 documents from other points in TI history:
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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4
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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5 ftp://ftp.freecalypso.org/pub/GSM/Calypso/rf_calibration.pdf
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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6
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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7 https://www.freecalypso.org/LoCosto-docs/Production%20test%20and%20calibration/i_sample_rf_test_and_calibration_13_03_04_01991%20-%20v026.pdf
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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8
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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9 The rf_calibration.pdf document we found back in 2011 dates from well before
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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10 our Calypso+Iota+Rita chipset and describes TI's much earlier Sara RF, whereas
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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11 the LoCosto document naturally deals with TI's LoCosto/I-Sample platform.
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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12
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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13 To the best of our understanding of TI history, Sara RF is two generations
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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14 before our Rita RF (as far as we know, the evolutionary line went from Sara to
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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15 Clara to Rita), whereas LoCosto (combining the baseband processor and RF
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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16 in the same chip) was a later development after the Calypso, hence our chipset
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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17 and the corresponding TCS211 firmware fall right in between the two calibration
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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18 docs we have.
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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19
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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20 The details of the calibration procedures that are correct for our
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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21 Calypso+Iota+Rita chipset and closely match those that have been performed by
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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22 Openmoko's factory have been reconstructed by Mychaela Falconia after very
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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23 careful scrutiny of both Sara and LoCosto calibration documents, combined with
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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24 detective analysis of calibration artifact files found in Openmoko-made GTA02
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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25 units; neither the Sara document nor the LoCosto one is particularly instructive
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
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26 by itself, and a *lot* of intelligent filling of the blanks was required.