FreeCalypso > hg > freecalypso-tools

annotate doc/Compal-calibration @ 450:b5235f8240b9

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doc/User-phone-tools: update for SMS PDU mode working on all targets
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 07 Feb 2019 21:22:27 +0000
parents 3d79116be312
children 6dcca662a02f
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1 Reading factory RF calibration values out of Mot C1xx phones
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2 ============================================================
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3
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4 Motorola C1xx phones are based on the Calypso+Iota+Rita chipset from TI and
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5 their firmware is also loosely based on TI's reference, but Compal (Motorola's
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6 ODM and the maker of these phones) have made lots and lots of changes moving
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7 away from TI's canonical way of doing things. When it comes to RF calibration,
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8 Mot/Compal have performed it on each individual unit on their factory production
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9 line just like all other GSM phone and modem manufacturers, but instead of
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10 storing the results of this calibration in TI's flash file system, Mot/Compal
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11 have put these calibration values into a completely different flash data
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12 structure of their own invention.
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13
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14 We don't know the proper name for Mot/Compal's flash data structure that has no
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15 counterpart in TI's canonical solution, but we know its location in the flash:
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16
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17 * On C1xx phones with 2 MiB flash (most C11x/12x variants), it is the 8 KiB
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18 flash sector at 0x1FC000;
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20 * On C139/140 phones and the rare C11x/12x variants with 4 MiB flash, it is the
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21 8 KiB flash sector at 0x3FC000;
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22
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23 * On C155/156 phones with 8 MiB flash, the data structure in question is
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24 contained in the first 8 KiB of the 64 KiB physical flash sector at 0x7E0000.
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25
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26 The flash sector in question contains record-structured data; we don't know the
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27 meaning of most of these records, but we have been able to find the RF
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28 calibration records among them and locate the actual calibration values of
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29 interest inside those records.
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30
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31 In order to extract the RF calibration values from your C1xx phone for use with
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32 FreeCalypso, you will need a dump of your phone's flash, or at least a dump of
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33 the specific 8 KiB sector at the model-dependent offset given above. As a
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34 specific example, if your phone is a C139/140 or a C11x/12x variant with 4 MiB
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35 flash and you have a complete dump of that flash, execute a command like the
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36 following:
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37
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38 c1xx-calextr -b rfbin flashdump.bin 0x3FC000
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39
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40 The c1xx-calextr utility locates the RF calibration records in the flash dump
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41 binary, extracts those calibration values contained therein which we are able
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42 to grok, and converts them to TI's canonical format for use with FreeCalypso
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43 firmware. The numeric argument after the flash image filename is the offset
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44 within that image file where the magic sector should be sought, and the -b
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45 option directs the tool to save the converted RF calibration tables in binary
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46 format (the alternative is -a for ASCII format) in the directory named after
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47 the option, named rfbin in this example.
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48
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49 If you use the binary output option as recommended here, the resulting output
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50 directory will have two subdirectories in it, named rx and tx. The rx
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51 subdirectory will contain agcparams and calchan tables for each band, and the
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52 tx subdirectory will contain a levels table for each band. This directory
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53 structure and these names for the binary files correspond directly to the
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54 /gsm/rf directory subtree in the flash file system (FFS) of TI's canonical
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55 solution, hence once the C1xx phone in question is converted to FreeCalypso
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56 (i.e., runs FreeCalypso fw with an aftermarket FFS created for it), you can
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57 upload the extracted and converted RF calibration values into it like this:
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59 fc-fsio upload-subtree rfbin /gsm/rf
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60
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61 Rx channel correction values
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62 ============================
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63
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64 A GSM phone or modem needs to know how to derive the actual input signal level
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65 in dBm from the power measurements reported by the DSP; the difference between
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66 the two is called the "magic gain" (GMagic), and the firmware needs to know
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67 what it is. The primary GMagic value for each band is calibrated at the center
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68 frequency of that band, and then there are channel-dependent corrections
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69 applied.
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70
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71 In TI's canonical solution the complete ARFCN range of each band is divided
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72 into up to 10 subbands, and each of these subbands gets its own channel
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73 correction value. The ARFCN boundaries between the subbands are defined by the
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74 external calibration system and not by the firmware code, by virtue of being
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75 given inside the Rx calchan table itself along with the correction values.
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76
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77 But Motorola/Compal have made two changes:
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78
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79 * They increased the number of subbands from 10 (TI's canon) to 21 for the
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80 GSM850 band, 30 for the EGSM band, 63 for DCS and 50 for PCS, so that each
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81 subband is only 6 channels (1.2 MHz).
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82
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83 * The ARFCN boundaries for the subbands are not stored in the calibration
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84 records in the flash, but are fixed in the firmware instead.
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85
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86 Changing our FreeCalypso firmware to allow up to 63 Rx AGC subbands to match
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87 Mot/Compal's fw would be too disruptive, hence our current c1xx-calextr
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88 implementation translates Mot/Compal's Rx channel correction values to TI/FC
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89 format by combining groups of Mot/Compal's subbands into larger subbands, and
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90 making a mean value out of the smaller subband correction values in Mot/Compal's
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91 factory calibration record.
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92
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93 The AGC subbands defined by Mot/Compal's fw are listed below, with each numeric
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94 line giving the ARFCN range of each subband; blank lines separate the groupings
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95 made by c1xx-calextr.
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97 850 MHz band:
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99 128-134
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102 141-146
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e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
124 231-236
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
125
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
126 237-242
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
127 243-248
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
128 249-251
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
129
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
130 900 MHz band:
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
131
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
132 0-6
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
133 7-12
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
134 13-18
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
135
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
136 19-24
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
137 25-30
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
138 31-36
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
139
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
140 37-42
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
141 43-48
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
142 49-54
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
143
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
144 55-60
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
145 61-66
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
146 67-72
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
147
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
148 73-78
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
149 79-84
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
150 85-90
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
151
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
152 91-96
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
153 97-102
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
154 103-108
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
155
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
156 109-114
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
157 115-120
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
158 121-124
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
159
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
160 975-975
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
161 976-981
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
162 982-987
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
163
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
164 988-993
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
165 994-999
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
166 1000-1005
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
167
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
168 1006-1011
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
169 1012-1017
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
170 1018-1023
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
171
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
172 1800 MHz band:
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
173
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
174 512-518
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
175 519-524
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
176 525-530
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
177 531-536
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
178 537-542
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
179 543-548
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
180
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
181 549-554
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
182 555-560
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
183 561-566
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
184 567-572
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
185 573-578
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
186 579-584
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
187
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
188 585-590
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
189 591-596
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
190 597-602
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
191 603-608
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
192 609-614
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
193 615-620
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
194
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
195 621-626
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
196 627-632
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
197 633-638
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
198 639-644
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
199 645-650
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
200 651-656
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
201
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
202 657-662
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
203 663-668
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
204 669-674
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
205 675-680
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
206 681-686
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
207 687-692
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
208
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
209 693-698
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
210 699-704
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
211 705-710
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
212 711-716
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
213 717-722
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
214 723-728
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
215
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
216 729-734
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
217 735-740
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
218 741-746
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
219 747-752
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
220 753-758
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
221 759-764
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
222
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
223 765-770
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
224 771-776
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
225 777-782
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
226 783-788
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
227 789-794
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
228 795-800
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
229 801-806
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
230
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
231 807-812
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
232 813-818
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
233 819-824
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
234 825-830
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
235 831-836
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
236 837-842
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
237 843-848
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
238
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
239 849-854
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
240 855-860
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
241 861-866
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
242 867-872
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
243 873-878
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
244 879-884
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
245 885-885
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
246
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
247 1900 MHz band:
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
248
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
249 512-518
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
250 519-524
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
251 525-530
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
252 531-536
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
253 537-542
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
254
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
255 543-548
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
256 549-554
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
257 555-560
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
258 561-566
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
259 567-572
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
260
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
261 573-578
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
262 579-584
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
263 585-590
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
264 591-596
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
265 597-602
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
266
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
267 603-608
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
268 609-614
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
269 615-620
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
270 621-626
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
271 627-632
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
272
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
273 633-638
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
274 639-644
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
275 645-650
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
276 651-656
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
277 657-662
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
278
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
279 663-668
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
280 669-674
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
281 675-680
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
282 681-686
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
283 687-692
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
284
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
285 693-698
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
286 699-704
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
287 705-710
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
288 711-716
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
289 717-722
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
290
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
291 723-728
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
292 729-734
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
293 735-740
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
294 741-746
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
295 749-752
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
296
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
297 753-758
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
298 759-764
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
299 765-770
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
300 771-776
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
301 777-782
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
302
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
303 783-788
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
304 789-794
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
305 795-800
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
306 801-806
e05563f0dfcf doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 300
diff changeset
307 807-810
304
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
308
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
309 Tx channel correction values
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
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diff changeset
310 ============================
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
311
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
312 A similar situation holds here: in TI's canon each band is divided into 8
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
313 subbands for the purpose of Tx channel-dependent corrections, but Mot/Compal
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
314 seem to be using smaller subbands: 13 for the GSM850 band, 18 for EGSM, 38 for
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
315 DCS and 30 for PCS. We can see where these correction values are stored in the
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
316 calibration records in the flash (immediately after the Tx levels array), but
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
317 the ARFCN boundaries of Mot/Compal's Tx channel calibration subbands are not
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
318 known, and the semantics of the correction values themselves are not clear:
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
319 Mot/Compal's Tx channel correction values are centered around 0, whereas in
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
320 TI's canonical version they are centered around 128.
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
321
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
322 Because we are not able to grok Mot/Compal's Tx channel correction, we currently
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
323 ignore this part of their factory calibration, i.e., FreeCalypso fw will run
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
324 with all channel correction values set to 128, meaning no channel correction.
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
325 But since we do use the Tx levels table of APC DAC values from Mot/Compal's
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
326 factory records, and given that the tolerances for Tx power levels given in the
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
327 GSM 05.05 spec are quite generous, we expect to still be within these tolerances
9c1444923495 doc/Compal-calibration: c1xx-calextr handles Rx calchan now
Mychaela Falconia <falcon@freecalypso.org>
parents: 302
diff changeset
328 despite the lack of channel correction.
305
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
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parents: 304
diff changeset
329
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
330 In vivo approach: tried and failed
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
331 ==================================
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
332
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
333 Before I figured out the format of Mot/Compal's factory calibration records in
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
334 their flash and wrote the c1xx-calextr "in vitro" extraction and conversion
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
335 tool, I tried an "in vivo" approach: reading the calibration values out from
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
336 the running firmware via TI's L1/RF Test Mode commands which are still present
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
337 in Mot/Compal's fw. This approach successfully yielded the tables of Tx ramp
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
338 templates which are calibrated per design rather than per unit and thus compiled
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
339 into the fw and not present in the per-unit factory calibration records (these
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
340 extracted Tx ramps tables are now used by FC Magnetite fw when built for the
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
341 C139 target), but does not help with much of anything else:
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
342
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
343 * One can read the calibrated Tx levels table (rftr 16) for the low frequency
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
344 band (850 or 900 MHz), but not for the high (1800 or 1900 MHz) band: in order
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
345 to access the tables for the high band, one needs to issue an rfpw 7 command,
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
346 but in Mot/Compal's version the latter command only loads the compiled-in
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
347 tables and does not apply their non-TI calibration records.
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
348
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
349 * The Rx agcparams table returned in response to rftr 31 always has the GMagic
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
350 field set to the fw's compiled-in value and not the calibrated one.
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
351
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
352 * The Rx calchan table (which Mot/Compal enlarged from 10 to 63 entries as
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
353 explained earlier in this article) cannot be read out at all: the rftr 25
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
354 command crashes the firmware, probably via a buffer overflow from the
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
355 enlarged table.
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
356
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
357 * The Tx calchan table can be read out with rftr 17, but it does not make any
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
358 sense: it still has 4 copies of a table of 8 subbands like in TI's canon,
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
359 even though when we look at their factory calibration records, we can clearly
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
360 see that the table of Tx channel correction values is also enlarged. But the
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
361 correction values themselves are centered around 0 in this strange table
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
362 returned in response to rftr 17, and not around 128 like in TI's canon.
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
363
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
364 The fc-readcal utility was written before c1xx-calextr, and it was my original
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
365 idea of how to extract Mot/Compal's factory RF calibration values. It features
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
366 a -c command line option for "Compal mode" which disables the reading of Rx
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
367 calchan and Tx calchan tables via rftr 25 and rftr 17, respectively (the former
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
368 crashes the fw, the latter has the wrong semantics), but because it issues
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
369 rfpw 7 commands for each band preceded by tms 1, it will only yield the
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
370 firmware's compiled-in values, and not any of the factory-calibrated ones.
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
371
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
372 Therefore, the fc-readcal method should not be used, and the c1xx-calextr method
3d79116be312 doc/Compal-calibration: fc-readcal failed approach documented
Mychaela Falconia <falcon@freecalypso.org>
parents: 304
diff changeset
373 described in the main body of this article should be used instead.