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Техническое руководство по пейджинговому передатчику MOTOROLA NUCLEUS

SECTION 8: External Connections
 
Triple Circulator (Option X676)
(Adds Double Circulator and External Wattmeter)
 
Option X676 adds a factory-installed double circulator assembly to a Nucleus Advanced Control Paging Station. The double circulator assembly combines with the single circulator located in the Power Amplifier Module to create the triple circulator.

The double circulator assembly consists of a double circulator, a 50 ohm load with heat sink, a low pass filter, and an external wattm eter secured to a peripheral bracket m ounted on the rear of the station. The rf output from the Power Amplifier Module connects to the input of the double circulator, while the output of the double circulator connects to the external low pass filter. The output of the low pass filter connects to the external wattmeter. The external wattm eter output connects to the transmit antenna system. Refer to Figure 8-3.

 

Double

Figure 8-3 Double Circulator Assembly, Low Pass Filter, and Wattmeter Inputs and Outputs (High Power Station shown)

 
8_3
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