KVH Industries DIRECTV User Manual page 79

5. If you want to designate the receiver as the
primary receiver, highlight Set Primary. If you
want to designate the receiver as a secondary
receiver, highlight Set Secondary. Then press
SELECT.
Receivers are set to "Primary" by default at
the factory. Therefore, you will need to set
any additional receivers to "Secondary."
54-0376
ANTENNA Light on Secondary Receivers
The ANTENNA light on secondary receivers will
remain off at all times. Only the primary receiver can
monitor antenna status.
ANTENNA Light on Secondary Receiver
Antenna Controls
Always Off
9.7