Comtech EF Data PCB-4000 - Manual (Page 38)

PCB-4000 1+1 Phase Combiner Revision 2
Installation, Startup, and Troubleshooting Procedures MN/PCB4000.IOM
3–10
Step Task
7
Make sure the lock nut on the phase shifter is tightly secured by using the supplied socket, then replace the
cover panel.
3.7 System Online and Transmitting
This procedure assumes that the system installation is complete and that access to the system
output port is unavailable due to current system traffic.
To check for proper operation, measure and compare the difference in power transmitted
versus the power dissipated in the load termination.
Follow these steps:
Step Task
1
A. Attach a power meter to the Combined System Output Power Test Coupler (Figure 3-1).
B. Measure the output power and include the coupler correction factor.
2
A. Attach a power meter to the
Wasted (“Load”)
Power Test Coupler (Figure3-1).
B. Measure the power and include the coupler correction factor.
3
The
Wasted (“Load”)
power level should be 15-20 dB below the power being transmitted to the
antenna.