Feig Electronic ID ISC.MR102, Installation Manual, Page: 10 / 26

Identification Installation ID ISC.MR102
FEIG ELECTRONIC GmbH Page 10 of 26 M01210-6e-ID.doc
Antenna terminal ANT 1
A SMA socket is provided on the circuit board for connecting the external antenna.
The maximum tightening torque for the SMA socket is 0.45 Nm.
Caution:
Higher tightening torque will damage the connector.
Terminal Description
X4 Connecting the external antenna
(input impedance 50

)
Table 3: Connecting the external antenna
Note:

The input impedance for the antenna must be calibrated to a value of
50
 
(15
 
15°).

If the antenna ID ISC.ANT340240 is used a minimum distance of 20cm to any metal parts
are necessary. Otherwise there is a danger that the reader will be destroyed.

The optimum operating Q factor of the antenna should be in a range of QB = 10...20. To
determine the operating Q the antenna must be supplied with a 50 Ohm source such as
a network analyzer or frequency generator.

When connecting an antenna, ensure that it does not exceed the permissible limits pre-
scribed by the national regulations for radio frequency devices.
DC Voltage supply on antenna connector ANT1
The reader is able to provide a DC voltage on the antenna output ANT1. With this DC voltage a
external LED can be supported for example.
Note:

This DC voltage (7,5V± 1V) is designed for low current (max. 5mA) only.

Only antennas can be used which are designed for DC voltage and do not short cut DC
voltages.

For the connection of other devices (e.g. VSWR-Meter) it is necessary to check if DC
voltage is allowed.

This DC voltage is not sufficient for powering the ID ISC.DAT tuning board.