351804-1 Rev. 100
COM5000-8 TECHNICAL MANUAL
17
STDBY mode:
The Transmitter enters STDBY mode if the System Controller, the T-4180 and the 50VDC Power Supply
module is turned ON. Serial data communication must also have been established between the T-4180 and
the System Controller to enter STDBY mode. The transmitter remains in STDBY mode under certain fault
conditions.
OPER mode:
If the System Controller, the T-4180 and the 50VDC Power Supply modules are turned ON and serial data
communication has been established between the T-4180 and the System Controller, the OPER LED
indicator is lit.
Note:
The following conditions will prevent the Transmitter from entering OPER status (the
Transmitter will remain in STDBY mode):
a.
Operational Interlock (Cabinet rear door Interlock) disabled
b.
One or more Drawer Interlocks are disabled
c.
A serious fault condition
Note:
The Transmitter may enter the OPER status even if faults have been detected. Operation is
permitted
– at reduced power – under many fault conditions.
In the OPER mode, the 50VDC Power Supply module green DC ON LED is turned ON.
The Transmitter system is now ready to be keyed (PTT).
For detailed operation instructions refer to the T-4180 manual.
3.3.3
Transmitter External Control Protocol
The T-4180 provides external RS-232/RS-422 control of the transmitter from a PC. Refer to the T-4180
manual.
3.3.4
Continuous Bit Operation
During operation a number of critical functions are monitored to detect performance degradation or faults.
The conditions monitored in each of the modules comprising the COM5000-8 and in the rack cabinet
system as well as “external” conditions monitored are described in the following.
Faults are indicated by fault LED's on the System Controller front panel and on the four PA module front
panels. (Note: Momentary flashing of a fault LED does not indicate a fault. The LED must be on
continuously to indicate a fault.)
Содержание COM5000-8
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