Comtech EF Data CDM-760 - Manual (Page 135)

Front Panel Operation Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
6–49
Type Alarm State
Unit
(cont.) MEO ACU Comms
The modem has been set to run in MEO mode and the communication
between the remote Tx/Rx modem and the ACU is timing out or is getting a
corrupt / unexpected response.
Ethernet Link Down
One or more of the Modem's Gig-E Ethernet ports (J5, J6, J7) is enabled
but the modem does not detect any connection to another device (switch /
router / PC etc.).
Tx
(Transmit)
Internal DAC Clk PLL The modem's internal DAC clock out of range or has failed
Internal Tx LO PLL The modem's internal Tx clock out of range or has failed
PIIC1 Sym Clk PLL
A PIIC interface has been selected but the symbol clock rate that is being
derived from the data does not match the modem SR programmed.
PIIC2 Sym Clk PLL
A PIIC interface has been selected but the symbol clock rate that is being
derived from the data does not match the modem SR programmed.
PIIC1 Input Signal Low An OC-3 data interface was selected but the optical SFP module has
determined that the optical signal level is low.
PIIC2 Input Signal Low An OC-3 data interface was selected but the optical SFP module has
determined that the optical signal level is low.
Rx
(Receive)
Demod Unlocked Demod is not locked to a signal.
Rx Level Receive Power Level has tripped AGC alarm point.
CnC Unlocked Carrier-in-Carrier is enabled but not locked.
Internal ADC Clk PLL The modem's internal ADC clock out of range or has failed
EsNo Threshold Receive EsNo is below configured alarm point.
Internal Rx LO PLL Receive Phase Lock Loop fault.
PIIC1 Buffer Overflow A PIIC interface has been selected but the data rate coming into the PIIC
card exceeds the expected data rate of the user configured PIIC data rate.
PIIC1 Buffer Underflow
A PIIC interface has been selected but the data rate coming into the PIIC
card is less than the expected data rate of the user configured PIIC data
rate.
PIIC1 Buffer CLK PLL
A PIIC interface has been selected but the data rate coming into the PIIC
card is either too high, too low or has too much jitter to generate a
consistent clock for the modem
PIIC2 Buffer Overflow A PIIC interface has been selected but the data rate coming into the PIIC
card exceeds the expected data rate of the user configured PIIC data rate.
PIIC2 Buffer Underflow
A PIIC interface has been selected but the data rate coming into the PIIC
card is less than the expected data rate of the user configured PIIC data
rate.
PIIC2 Buffer CLK PLL
A PIIC interface has been selected but the data rate coming into the PIIC
card is either too high, too low or has too much jitter to generate a
consistent clock for the modem
Decompress Invalid
The modem is receiving data and there is a mismatch between what the far
end is configured for compression (enable/disable) and the alarmed demod
decompression (enable/disable).
LNB Current
The modem has exceeded the high or low current levels as programmed
by the user.
LNB Voltage
The modem detects that the LNB power connection is either OPEN or
SHORT.
Bad/Missing ACM
Packet
The modem's internal local / distant ACM messaging is either missing or
corrupt.