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annotate sim-fpc-pasv/README @ 80:6bd0e0627938

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sim-fpc-pasv: starting project with MCL
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Oct 2022 03:17:34 +0000
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6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 The little board to be built in this directory is going to be an addition to
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 the SIMtrace family: it will be a purely passive adapter, hosting a SIM socket
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 and a connector for the existing FPC cables from Sysmocom SIMtrace2 kit. This
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 passive adapter will allow strictly non-invasive observation with an
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 oscilloscope, particularly observation of SIM voltages being put out by
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 different old phones, without any active components that need to be powered,
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 that may be damaged by 5V phones, or that may alter SIM-ME interface behaviour
6bd0e0627938 sim-fpc-pasv: starting project with MCL
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 through introduction of alien power supplies, pull-ups or shifters.