Preventive Maintenance and Fault-finding
Page 8-12
Reference Guide: SM6610, SM6615, SM6620 and SM6625 Satellite Modulators
ST.RE.E10152.2
8.9.7
IF Card (Slot 1) Alarms
The alarms sourced by the IF card are listed in Table 8.8 and Table 8.9.
Table 8.8: IF Card Alarms – IF Output Models SM6610 and SM6620
Terminal Alarm Message
Front Panel Alarm Message Severity Level
IF Carrier Frequency Unlocked
IF Carrier Frequency Unlocked
Critical
IF Power Level Error
IF Power Level Error
Major
IF Output Muted
IF Output Muted
Critical
Table 8.9: IF Card Alarms – L-Band Output Models SM6615 and SM6625
Terminal Alarm Message
Front Panel Alarm Message Severity Level
IF Carrier Frequency Unlocked
IF Carrier Frequency Unlocked
Critical
IF Output Muted
IF Output Muted
Critical
Up-converter Power Shutdown
UpConv Power Shutdown
Major
8.9.8
Front Panel Alarm LED
The red front panel Alarm LED is lit when any unmasked alarm condition
exists.
NOTE…
The front panel display indicates the alarm severity level by using a numeric index. These are
described under Alarm Severity Levels on page 8-9.
8.9.9
Alarm and Fail Relays
The alarm and fail relay contacts (described under Signal Connections in
Chapter 2, Installing the Equipment) are driven by the equipment’s alarms
and warnings. Table 8.10 shows the effect of masking on the relays and
the Alarm LED.
Table 8.10: Effect of Masking the Alarm and Fail Conditions
Mask Relay Alarm
LED
Off None -
Alarm Alarm
✔
Fail Alarm
+
Fail
✔
