Applying Power To The Buc - Comtech EF Data CDM-600L Installation And Operation Manual

CDM-600L Satellite Modem
DST Setup
18.3

Applying Power To The BUC

CAUTION
The conditions for the BUC to function are:
Note: Manufacturer recommends a 5-minute warm-up period at initial turn on for the
BUC to ensure proper performance. This can be accomplished by performing steps 15
through 18, prior to initiating the power start-up.
1. Care should be exercised in cable installation. Install the cables using
the most direct route and secure with clamps and ties. Avoid all sharp
bends. Replacement of the cables can be the result.
2. If the ODU voltage is not correct, DO NOT connect the TX-IF Cable to
the modem or damage may result. Contact Comtech EF Data Customer
Service department.
3. Ensure TX and RX L-Band cables are not connected. After the modem is
checked out, then configure to operate with the ODU.
4. Initially, set LNB and BUC current wide enough to avoid false reports
during installation. Readjust the limit at a later time.
5. For FSK operation with an FSK capable BUC see the Chapters 6 and 16.
Complete steps 13 through 29 prior to continuing.
Proper TX L-Band power to the BUC from modem.
Sufficient and correct DC power at the BUC
10 MHz reference supplied to the BUC
18–4
Revision 2
MN/CDM600L.IOM