Revision 4 - December 17,1998 Ryan TCAD 9900 Series Page 2-11
D. The bottom mounted TCAD antenna should be at least three feet from
transponder or DME antennas.
E. The cable lengths must be matched and meet the 3dB requirement. See
Paragraph 1.9.
F. Avoid mounting the bottom antenna where exhaust or oil will
contaminate the surface of the antenna.
2.14 OVERVIEW OF ELECTRICAL INSTALLATION
The block diagram in Figure 2-10 provides an overview of TCAD wiring. This simplified
illustration depicts the basic elements of the electrical wiring, and allows the installer to
better comprehend the total installation before proceeding with detailed steps.
The 9-pin connector marked “COM 1” is for an external computer interface with TCAD,
and is not normally used.
All wiring should be secured to prevent chafing and faulty connections. Refer to Advisory
Circular 43.13-2A.
NOTE: A 3-Ampere trip-free resettable circuit breaker must be installed between
the aircraft electrical bus and the TCAD Processor and Display.
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