Specifications

4000326 Rev A Transmitters 1-119
Troubleshoot Alarm Conditions
Introduction
The following troubleshooting information helps identify possible causes and
solutions to transmitter alarm conditions.
Troubleshooting Alarms
If the red Alarm indicator is illuminated or blinking, check the ICIM display or the
appropriate LCI screen to determine the cause of the alarm.
Refer to the following table for troubleshooting assistance.
Parameter Typical Range Possible Solutions
Laser Bias 50 to 100 mA
Internal problem.
Telephone the Scientific-Atlanta
assistance center in your area for
assistance.
Laser Temperature 20.0°C to 35.0°C
Module Temperature -40.0°C to 85.0°C
Check fan tray.
Modulator Bias -5 V to +5V
2 GHz SBS Power 10 to 400
6 GHz SBS Power 10 to 400
Internal problem.
Telephone the Scientific-Atlanta
assistance center in your area for
assistance.
RF Input 0.0 dB Check RF source and cable.
Output Power ±0.5 dBm of nominal
-5V Supply Voltage -5 V high or low
-12V Supply Voltage -12 V high or low
+12V Supply Voltage +12 V high or low
Internal problem.
Telephone the Scientific-Atlanta
assistance center in your area for
assistance.
Power Supply Status Fault
Check module seating and chassis
power supply.
Laser Enabled Status
• Enable
• Disable
Laser disabled.
SBS 2 GHz PLL
SBS 6 GHz PLL
Constant Power Loop
Locked
• Lock
• Unlock
Internal problem.
Telephone the Scientific-Atlanta
assistance center in your area for
assistance.