Comtech EF Data CSAT-6070 - Manual (Page 107)

5 to 25 Watt C-Band Transceiver Revision 0
Maintenance and Troubleshooting MN/CSAT607025.IOM
During normal operation, neither the Upconverter nor the Downconverter
synthesizer or IFLO should experience a Lock Detect fault.
• If one or more of these functions is faulted the transceiver will not
function properly.
• If a fault condition exists and an EXT REF is being used, check the
connection to the transceiver and make sure it is secure.
• It may be necessary to remove the EXT REF if it is faulty.
• If the fault still exists, contact Comtech EF Data Customer Support .
C.3.3 R
EFERENCE
O
SCILLATOR
M
ODULE
Reference Lock Detect:
A fault ("FT") indicates that the reference oscillator is not locked. Check all
connections to the converter module to make sure they are secure. If the fault still
exists, contact Comtech EF Data Customer Support.
C.3.4 LNA C
URRENT
F
AULT
LNA Current Fault:
This can indicate either a problem in the CSAT LNA current source circuitry or a
problem with the LNA.
• First, insure that the LNA is connected and that no shorts exist. Use the
RMS? Command to query the measured LNA current.
• If the LNA and cable are OK, proceed to disconnect the LNA and measure
from the center conductor of the cable to the shield of the cable using a
DVM. A voltage of 11 Vdc shall be measured if the LNA Current Source
is Enable (i.e. LCS=1).
• Contact Comtech EF Data Customer Support for further troubleshooting.
C.3.5 F
AN
F
AULT
Fan Fault:
Contact Comtech EF Data Customer Support for troubleshooting help.
C–3