ComSonics CyberTek QUALIFIER User Manual page 45

Transmitter Antenna
Transmitter
An enhancement to the integrity (ingress) test system is the function of the receiver
activating the transmitter only when measurements need to be made. Thereby reducing
vehicle power drain, transmitter heating, and general RF pollution. Additionally, the
activation signal from the receiver is encoded and the transmitter recognizes the encoded
activation signal. In this manner, false transmitter activation is eliminated. A multitude of
activation codes is available allowing multiple test systems to be in operation in the same
vicinity. Only the transmitter associated with a given receiver code activates when needed.
In practice the transmitter and activate antennas are combined into one dual band antenna
with a diplex filter at the transmitter/receiver.
A further enhancement is the coding of the transmitter signal. In this manner, the receiver
can reject measurements not recognized as those from the test transmitter.
Exhibit F
Activate Antenna
Service Vehicle
Activate
Signal
Appendix - Qualifier System
Local Tap
Drop Cable
Receiver
Ground Block
3-15
Inside Cables