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annotate txlevels/README @ 119:8054c1967c32

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txlevels: OM-like profile set named just rf3166
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Feb 2018 02:18:20 +0000
parents 630617d5ece3
children
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630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 Two sets of Tx power level calibration profiles have been created so far:
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 rf3166-ideal and rf3166-fcdev3b. As implied in the naming, both sets of
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 profiles are meant for GSM MS designs using the RF3166 PA as used by Openmoko,
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 following OM's triband board design for the RF section. The only difference
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 between the two versions is in the target dBm number for the maximum power
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 level for the low band (EGSM or GSM850): it is 33 dBm as the GSM 05.05 spec
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 calls for in the rf3166-ideal-900 profile, but the rf3166-fcdev3b-900 profile
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 has it shifted down to 32.2 dBm, similarly to how TI did it on their I-Sample
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 (LoCosto) boards. The rf3166-ideal profile set works for recalibrating
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 Openmoko-made GTA02 devices, producing even better Tx power levels than OM's
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 original (set to unshifted GSM 05.05 spec targets), but on our own FCDEV3B
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 boards we are not able to get the full 33 dBm Tx output in the low band, hence
630617d5ece3 txlevels: updated README
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 the rf3166-fcdev3b profile set with the shifted target.