Microwave Radio Communications SCM4000, Technical Reference Manual, Page: 193 / 274

Troubleshooting 4-3 SCM4000 Operator’s Guide/Tech Ref Manual
Table 4-2: SCM4000 Modulator Primary Error Codes
Error
Code
Error Message Meaning Suggested Operator Action
Suggested Technical Staff
Action
Status Errors
(Some part of System is reporting an abnormal condition.)
E220 Mod Ch1 OF Channel 1 FIFO Overflow Fault • Verify the Modulator is set to
the correct data rate for the
given channel.
• Contact technical staff.
If problem persists, possible
hardware failure. Contact MRC
Technical Support.
E221 Mod Ch2 OF Channel 2 FIFO Overflow Fault
E222 Mod Ch3 OF Channel 3 FIFO Overflow Fault
E223 Mod Ch4 OF Channel 4 FIFO Overflow Fault
E224 Mod Ch1 UF Channel 1 FIFO Underflow Fault
E225 Mod Ch2 UF Channel 2 FIFO Underflow Fault
E226 Mod Ch3 UF Channel 3 FIFO Underflow Fault
E227 Mod Ch4 UF Channel 4 FIFO Underflow Fault
E228 Mod Cal Er Rate Calculation Error - The total
data rate exceeds the capacity for
the given symbol rate and
modulation. • Increase the symbol rate,
move the modulation to a
higher throughput type (i.e.,
from 16QAM to 32QAM), or
decrease the rate on a variable
rate channel.
• Contact technical staff.
If problem persists, contact MRC
Technical Support.