OBID i-
scan
®
Installation
ID ISC.ANT1300/680-A/-B
FEIG ELECTRONIC GmbH
Page 26 of 45
M71104-6e-ID-B.doc
4.2.7 Tuning the Gate Antenna with Power Splitter
For tuning the antennas you will need a suitable measuring device (e.g. SWR-Meter or SWR-
Analyzer) The SWR-Meter has to be looped in between power splitter and antenna with a 30cm
coax cable RG58. (see Fig. 18) The reader must be set to ISO-Host Mode. If necessary the anten-
nas could be tuned by setting or removing the jumpers of the capacitors C1 and C2. You should
start the tuning with the lowest values of the capacitors and then to use the next higher values.
First start with capacitor C2. If there no change anymore you should continue with capacitor
C1.The standing-wave ratio should be at least 1:1,2 or better. .50 +/-5 Ohm Phase 0° +/-5° at the
SWR-Analyzer.
This hast o be done for both antennas.
Fig. 18 Tuning the antennas with a SWR-Meter
X3
X1
Power Splitter
ID ISC.ANT.PSM-B
X1
1,35m
Long Range Reader
ID ISC.LRM2000-C
IN1
X9, Pin1+3
X2
3,60m
30cm