SECTION 8: External Connections
Double Circulator (Option X677)
(Adds Single Circulator and External Wattmeter)
Option X677 adds a factory-installed single circulator assembly to a
Nucleus Advanced Control Paging Station. The single circulator assembly
combines with the single circulator located in the Power Amplifier Module
to create the double circulator.
The single circulator assembly consists of a single circulator, a 50 ohm
load with heat sink, a low pass filter, and an external wattm eter secured
to a peripheral bracket mounted on the rear of the station. The rf output
from the Power Amplifier Module connects to the input of the single circulator,
while the output of the single 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—4.
Single Circulator Assembly, Low Pass Filter, and Wattmeter Inputs and Outputs (Standard Power Station shown)