FreeCalypso > hg > freecalypso-tools
annotate doc/Compal-calibration @ 434:3ec8ef8b2d37
top README simplified, source dirs info moved to Source-dirs
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Sun, 04 Nov 2018 19:24:46 +0000 |
| parents | 3d79116be312 |
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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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19 |
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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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58 |
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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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96 |
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97 850 MHz band: |
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98 |
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99 128-134 |
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100 135-140 |
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101 |
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102 141-146 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
103 147-152 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
104 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
105 153-158 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
106 159-164 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
107 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
108 165-170 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
109 171-176 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
110 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
111 177-182 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
112 183-188 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
113 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
114 189-194 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
115 195-200 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
116 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
117 201-206 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
118 207-212 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
119 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
120 213-218 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
121 219-224 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
122 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
diff
changeset
|
123 225-230 |
|
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>
parents:
300
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>
parents:
300
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>
parents:
300
diff
changeset
|
287 705-710 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
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>
parents:
300
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>
parents:
300
diff
changeset
|
304 789-794 |
|
e05563f0dfcf
doc/Compal-calibration: Rx calchan ranges documented
Mychaela Falconia <falcon@freecalypso.org>
parents:
300
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
Mychaela Falconia <falcon@freecalypso.org>
parents:
302
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>
parents:
302
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
Mychaela Falconia <falcon@freecalypso.org>
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
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331 ================================== |
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332 |
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333 Before I figured out the format of Mot/Compal's factory calibration records in |
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334 their flash and wrote the c1xx-calextr "in vitro" extraction and conversion |
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335 tool, I tried an "in vivo" approach: reading the calibration values out from |
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336 the running firmware via TI's L1/RF Test Mode commands which are still present |
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337 in Mot/Compal's fw. This approach successfully yielded the tables of Tx ramp |
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338 templates which are calibrated per design rather than per unit and thus compiled |
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339 into the fw and not present in the per-unit factory calibration records (these |
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340 extracted Tx ramps tables are now used by FC Magnetite fw when built for the |
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341 C139 target), but does not help with much of anything else: |
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342 |
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343 * One can read the calibrated Tx levels table (rftr 16) for the low frequency |
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344 band (850 or 900 MHz), but not for the high (1800 or 1900 MHz) band: in order |
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345 to access the tables for the high band, one needs to issue an rfpw 7 command, |
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346 but in Mot/Compal's version the latter command only loads the compiled-in |
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347 tables and does not apply their non-TI calibration records. |
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348 |
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349 * The Rx agcparams table returned in response to rftr 31 always has the GMagic |
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350 field set to the fw's compiled-in value and not the calibrated one. |
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351 |
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352 * The Rx calchan table (which Mot/Compal enlarged from 10 to 63 entries as |
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353 explained earlier in this article) cannot be read out at all: the rftr 25 |
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354 command crashes the firmware, probably via a buffer overflow from the |
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355 enlarged table. |
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356 |
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357 * The Tx calchan table can be read out with rftr 17, but it does not make any |
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358 sense: it still has 4 copies of a table of 8 subbands like in TI's canon, |
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359 even though when we look at their factory calibration records, we can clearly |
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360 see that the table of Tx channel correction values is also enlarged. But the |
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361 correction values themselves are centered around 0 in this strange table |
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362 returned in response to rftr 17, and not around 128 like in TI's canon. |
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363 |
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364 The fc-readcal utility was written before c1xx-calextr, and it was my original |
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365 idea of how to extract Mot/Compal's factory RF calibration values. It features |
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366 a -c command line option for "Compal mode" which disables the reading of Rx |
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367 calchan and Tx calchan tables via rftr 25 and rftr 17, respectively (the former |
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368 crashes the fw, the latter has the wrong semantics), but because it issues |
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369 rfpw 7 commands for each band preceded by tms 1, it will only yield the |
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370 firmware's compiled-in values, and not any of the factory-calibrated ones. |
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371 |
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372 Therefore, the fc-readcal method should not be used, and the c1xx-calextr method |
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373 described in the main body of this article should be used instead. |