Major Hardware Components
TRIND Overhead Antennas
Page 4-14 MDE-3664B TRIND® Start-up, Service, and Parts Manual · June 2013
TRIND Overhead Antennas
Full System TRIND has six antennas, four active and two passive. The active antennas can
further be divided as transmit only (overhead antennas), and transmit and receive [option
door/Customer Interface Module (CIM) door antennas]. All four operate in the LF band at
134.2 kHz. The two passive antennas receive in the UHF Band at 902 MHz (in the US) and at
868 MHz (Asia and Europe), and are used in conjunction with the overhead antennas to utilize
the car tags. There are two basic variations of the full system TRIND. The fundamental
differences are based on the Card Cage and the overhead antennas used. The antennas can be
divided into two sections, the original Mobil antennas (no longer available) and the
single-loop antennas, which are currently being shipped with full system TRIND.
Mobil Overhead Antenna Assembly (T20231)
The Mobil overhead antenna assembly consists of a multiple loop (47 uH) coil for LF
transmission, a tuning board, and sheet metal slot antenna for UHF receive. This assembly is
no longer available, but is still a part of the installed base at Mobil Stations. These antennas
have been replaced by the T20632 family of Overhead Antennas.
Figure 4-19: Mobil Overhead Antenna Assembly
Tuner Gasket
Tuner Cover
Tuning Board
Molded Antenna
902.858 MHz HF Antenna,
868.4 MHz HF Antenna
Mobil Overhead Antenna Assembly
Following table lists the Mobil Overhead Antenna Assembly parts:
Item
Description
Part Number
1
902.858 MHz HF Antenna Q13580-01
2
868.4 MHz HF Antenna
Q13580-02
3
Molded Antenna
Q13582-01
4
Tuning Board
Q13582-02
5
Tuner Gasket
Q13582-04
6
Tuner Cover
Q13582-03