5-44
Section 5 - System Operation Manual
(E-Compact ATSC Transmitters - EC701HP thru EC708HP)
Digital Alarms Exciter:
Exciter Alarms:
The table below profiles all possible alarms generated on the Digital Exciter and the associated
troubleshooting actions to take.
ALARM MESSAGE
ALARM DESCRIPTION
ACTION THAT FOLLOWS
Sync loss TS 1!
Lack of sync with the input
transport stream.
Check for the presence of TS 1 on the
rear BNC connector of the Exciter.
Further action if necessary check inside
the exciter for malfunction.
Sync loss TS 2!
Lack of sync with the
input transport stream.
Check for the presence of TS 2 on the
rear BNC connector of the Exciter.
Further action if necessary check inside
the exciter for malfunction.
LO Lock Fail!
Lack of LOCK
(UP Converter)
Check for mal-function on the UP
Converter.
Substitute the module.
Fifo Overflow!
FIFO Overflow
(modulator)
Full analysis of the circuitry will be
necessary.
Get in contact with Hitachi Kokusai
Linear's technical support service.
+15V, +3.3V, +2 8V,
+5V
PS failure; +15V, +3.3V,
28V or +5V
Follow the basic procedure with
voltmeter looking for some clear evidence
of malfunction. Replace the module if
necessary.
FPGA Comm. Fail!
No communication with
the FPGA.
Full analysis of the circuitry will be
necessary.
Get in contact with Hitachi Kokusai
Linear's technical support service.
FIFO Underflow!
Self-explanatory
No local action.
Clock / CXO Fail!
Self-explanatory
No local action.
Remote Mute!
The transmitter output
power was reduced to 0W
via remote action.
No local action.
Lack of LOCK
(Clock modulator)
Check for eventual cabling bad contact.
Full analysis of the circuitry will be
necessary.
Get in contact with Hitachi Kokusai
Clock Lock Fail!
Manual Rev. 0.1 - February 2018
