Comtech-ef-data CLC-10 Manuale Utente Scaricare il pdf (Pagina 35)

CLC-10 Comtech LPOD Controller Handheld Terminal M&C Accessory Revision 3

Serial-Based M&C using the CLC-10 MN-CLC10

3–3

3.3.4 Faults

The M&C system monitors certain key functions of the SSPA for proper operation. Should any of these parameters exceed

predetermined limits, the M&C system will declare a fault. The conditions that trigger a fault are:

• Any power supply more than ± 10% outside its nominal value.

• Fan less than 25% of maximum speed.

• I2C internal bus communications fault.

• Thermal Shutdown – A temperature fault is indicated if the unit is +>90°C. This creates a summary fault and will cause the unit

to mute itself and switch to the back-up unit (if in a redundant system). However, the 10V supply to the FET transistors will

remain on until the unit reaches the thermal shutdown temperature of ≥ >95°C. For protection reasons, the unit will shut down

the 10V supply to the power transistors at temperatures >95°C.

• Firmware checksum error at power up.

• FPGA done indicator error at power up.

• *Block upconverter (BUC) unlocked.

• Redundant waveguide switch position fault (applies to redundant mode operation only).

• Redundant inter-unit link fault (applies to redundant mode operation only).

• Low noise block converter (LNB) current over limit.

The following parameters can be user defined to report an alarm condition, a fault condition, or the parameter can be ignored

completely by masking it:

• RF amplifier low output power (user adjustable value)

• Internal reference oscillator unlocked

• *LNB converter current outside specified window

• *LNB voltage out of tolerance

*NOTE: If this parameter generates a fault condition, the RF output will be muted.

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Comtech-ef-data CLC-10 Manuale Utente Pagina 35