Feig Electronic OBID i-scan ID ISC.ANT.MUX, Manual

Page: 20 / 27

OBID i-scan
®
Manual Communication FU
FEIG ELECTRONIC GmbH Page 20 of 27 H30701-3e-ID-B
3.2.4. [0xC3]: Get Antenna-Values
This protocol is used to read the settings of the capacities C1 and C2 and the measured status of
the antenna impedance. Reasonable data can be received 250ms after power up of the Tuner (e.g.
after the Tuner is selected by a multiplexer).
Host
→
Tuner
CMD Data
[0xC3]
Tuner-Adr
1
0x02 8 bits 0xFE 8 bits
Host
←
Tuner
Data
STATUS
2
Value C1 Value C2 R Phi TU-ST
0x00 8 bits 8 bits 8 bits 16 bits 8 bits 8 bits
Value C1:
Value of C1 (0x00 – 0x7F)
Value C2:
Value of C2 (0x00 – 0x7F)
R:
Difference between R
ref
and R
mess
most significant least significant
8 bits 8 bits
Phi:
Value of Phase
ϕ
(0x00 – 0x5A)
1
see 3.1. System Description of the Antenna Tuner
2
see APPENDIX A: Index STATUS