2873.000.00 FEIG Electronic, 2873.000.00 Datasheet - Page 37

• Manufacturer Part Number: 2873.000.00
• Description: ID CPR.M02 VP/AB-CA READER MOD
• Manufacturer: FEIG Electronic
• Series: OBID® Classic-pro HF CPR.M02.VP/AB-BA/-CAr

Specifications of 2873.000.00

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO14443-A, ISO14443-B, ISO15693
• Package / Case: 50mm x 50mm x 14mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 2873.000.00.00; 629-1057

OBID
8.4.2. Retuning the internal antenna (ID CPR.M02.VP/AB-B / -C)
The antenna of the ID CPR.M02.VP/AB-B and ID CPR.M02.VP/AB-C can be detuned as a result of
various ambient conditions such as nearby metal objects (see Section 8.5). This detuning can be
compensated to some degree using the trim capacitor C315.
The integrated antenna can be retuned with the aid of an oscilloscope (bandwidth ≥ 20 MHz). To
do this, short the GND terminal of the oscilloscope probe with the probe point and hold it over the
circuit board of the ID CPR.M02. The probe then forms a measuring loop for the radiated magnetic
field of the ID CPR.M02. The distance between the oscilloscope probe and the ID CPR.M02 should
be between 0 and 3 cm.
Use the software command „RF-ON“ (0x6A) to turn on the HF field of the ID CPR.M02. A 13.56
MHz signal should be visible on the oscilloscope screen.
To tune the internal antenna, now set the signal amplitude of the 13.56 MHz signal to maximum
using trim capacitor C315.
FEIG ELECTRONIC GmbH
®
classic-pro
Turn C315 to set amplitude
to maximum
ID CPR.M02
X1
V1 V2
C65
Fig. 3.4.3-2: Configuration for tuning the internal antenna
Fig. 3.4.3-1: Trim capacitor for retuning the antenna
X1
V1
V2
J1
X3
X4
Page 37 of 42
Installation
C405
C315
DO NOT CHANGE !!!
Trim capacitor C405:
Retuning the integrated
Trim capacitor C315:
antenna
M21001-3de-ID-B.doc
ID CPR.M02