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 Circulator Assembly, Low Pass Filter, and Wattmeter Inputs and Outputs (High Power Station shown)