User's Manual

LF Transmitter Output
5-8 Configuration and Operation
LF Transmitter Output
The type of the generated LF excitation signals depends on the the position of “System” jumpers on
the LFA21 and CTL21.
For “System S21” jumpers J1 (LFA21) and J3 (CTL21) are to be set on S21 position. The LF
excitation signal generated is of type EXID. This signal is a continuous OOK signal on 125 KHz.
The modulation is a fixed repetitive frame [Excitation ID] containing the address of the reading
point. (Reader Address).
For “System 95” jumpers J1 (LFA21) and J3 (CTL21) are to be set on S95 position. The LF
excitation signal generated is of type CSAC. This signal is defined in the Appendix C. To properly
set the transmitter output for “System 95” please refer to the “95 Series RFID Systems User’s
Guide”.
To set the LF signal for “System S21”, refer to Figure 5-4 below, and do the following:
Figure 5-4: LF Signal Measurement
1. Connect the power to the Exciter. If there are additional Exciters connected to the same
Reader, make sure that their power is off.
2. To ensure proper setup, send the following commands:
:DISABLE:MS:EXCITER n<Enter>
ROD=N<Enter>
B<Enter>
Test
J2
J5J4
J1
1 2 3 4
S96
S21S95
L
O
L
O
GND
TAP
ANT
To LF Antenna
Terminal Block
Oscilloscope