ABC25UKA Manual
Page 12 of 36
10MHz Reference
The BUC must receive a stable external 10MHz reference provided by a stable signal source such as a signal
generator, satellite modem or injected externally with a Bias T (for example, ABT6ARN/ABT6ARF manufactured
by Actox Corporation) or a similar bias T type.
Please make sure to check the sticker on the BUC for the appropriate power source before any power
connections are performed.
Setting the L.O.
Switchable L.O. is mechanically changed by unscrewing the L.O. screw and pressing it in
with any small object such as toothpick. If the BUC is equipped with M&C interface, the
L.O. could be switching electronically with the appropriate M&C command.
Setting the TX and RX Frequencies
All transmit and receive frequencies are set in the modem.
For a direct connection to an L-band modem follow the manufacturer’s instructions on
setting the transmit and receive frequencies.
Ensure that it is safe to transmit prior to enabling the transmission.
