annotate doc/TI-docs @ 121:76faa4f52a4d

doc/Tx-cal-theory: fc-rfcal-txbasis -l option documented
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Feb 2018 03:55:03 +0000
parents 131abadbd74d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
63
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 We don't have a TI calibration document that exactly matches the
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
3 documents from other points in TI history:
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 ftp://ftp.freecalypso.org/pub/GSM/Calypso/rf_calibration.pdf
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
8
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
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>
parents:
diff changeset
11 the LoCosto document naturally deals with TI's LoCosto/I-Sample platform.
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
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>
parents:
diff changeset
15 Clara to Rita), whereas LoCosto (combining the baseband processor and RF
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
17 and the corresponding TCS211 firmware fall right in between the two calibration
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 docs we have.
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 The details of the calibration procedures that are correct for our
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
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>
parents:
diff changeset
22 Openmoko's factory have been reconstructed by Mychaela Falconia after very
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 careful scrutiny of both Sara and LoCosto calibration documents, combined with
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 detective analysis of calibration artifact files found in Openmoko-made GTA02
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 units; neither the Sara document nor the LoCosto one is particularly instructive
131abadbd74d doc/Rx-cal-theory written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 by itself, and a *lot* of intelligent filling of the blanks was required.