Feig Electronic OBID i-scan ID ISC.MAT-B, Монтаж, установка

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OBID i-scan
®
Montage / Installation ID ISC.MAT-B
FEIG ELECTRONIC GmbH Page 11 of 19 M70101-0e-ID-B.doc
6 Startup
6.1 Setting the tuning capacitances
Antenna tuning uses a compensation circuit consisting of capacitors C
1/1
, C
1/2
and C2 and a
transformer (ratio=2), configured as a balloon for balancing the antenna current. The capacitors
are divided symmetrically into C
1/1
and C
1/2
and must be of equal value. An equivalent schematic of
the compensation circuit with balloon is shown in Fig. 8. Jumpers can be used to switch capacitors
C
1/1
, C
1/2
and C2 into the circuit.
Fig. 8: Equivalent schematic for compensation circuit with balloon circuit