Comtech EF Data XTRT-400C Operation And Installation Manual page 164

Figure 3 - Manual / Automatic Mode
Manual / Automatic Mode
Touching the automatic button displays the confirmation screen for enabling automatic
switchover. VPC system when operating in automatic mode will have two different
modes of operation:
1. Power combined to the antenna – In this mode should an amplifier fail the
failed amplifier will automatically be switched out of the antenna position
effectively giving a 3 dB loss at the output. If this is not done the power from the
online unit will be spit in the VPC and half of its RF power will be routed to the
load (effectively presenting a 6 dB loss).
2. The VPC system can also be used in a one for one mode in which one amplifier is
routed to the antenna and the other to the load. When in automatic mode if the
amplifier routed to the antenna should fail the VPC will automatically route the
failed amplifier to the load and the working unit to the antenna.
MNC-0800-001
EAR EXPORT CONTROLLED: The information contained in this Manual refers or relates to a product that is subject
to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
whether in the U.S. or abroad, may require an export license from the U.S. Department of Commerce.
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Operation
Automatic
Mode
Revision 1