MDE-3664B TRIND® Start-up, Service, and Parts Manual · June 2013
Page 4-9
Card Cage Assemblies
Major Hardware Components
The UHF Receiver Module contained on the DCB, handles the uplink signal from the vehicle
tag. It receives the signal from the vehicle tag that transmits data on a UHF carrier, and down
converts and demodulates this signal to binary data. The UHF Receiver also includes the
master oscillator for the DCB and provides all clock signals for other elements within the DCB
to keep signal paths as short as possible. The UHF receive antenna connections are made via
Sub Miniature A (SMA) connectors on Antenna Cables (M00878A001, M00878A002, and
Q13578-01).
Q13579 Transmitter Board
Q13579-01 Transmitter Board is used in the T20229-G1 and T20606-G2 Full System Card
Cages. The Transmitter Board is actually a three-board assembly containing two identical
transmitter modules (one each for Sides A and B) mounted on a larger Printed Circuit Board
(PCB). The Q13579-01 Transmitter Board contains all the functions to activate vehicle tags.
The module includes a carrier board onto which are mounted two transmit-only Radio
Frequency Modules (RFMs), the power supply, oscillator and tuning connector for the RFMs,
logic circuitry to determine RFM selection, power level adjustment capability, and a pulse
width modulation circuit. This board re22 VDC, +5 VDC and GND through J6. If this
board is replaced, overhead antennas need to be retuned. The transmitter provides an
approximate 134 kHz signal for TRIND antennas, through JA for Side A and JB for Side B of
the dispenser.
Figure 4-11: Transmitter Board