6
ISOMET
3
LED INDICATORS
The front panel LEDs serve to indicate a number of possible operating states.
The LEDs [C] and [D] illuminate when the DC power is applied and the Interlocks are valid.
•
[A] Shows GREEN when the RF output is live PROVIDED:
a) the modulation duty cycle is more than 20% (approx).
b) the RF CW power is > 20% (approx) of the driver maximum power
•
[B] Not applicable – for future options
•
[C] shows RED when the DC power is applied
•
[D] shows GREEN when the (thermal) Interlocks are enabled
Caution
, the RF output may be live even if these LED’s are not illuminated.
LEDs Off
The LEDs [C] and [D] will not illuminate if :
a) the internal driver thermal interlock switch is open (Over temperature fault)
b) the AOM thermal interlocks switch is open (Over temperature fault)
c) the AOM thermal interlock is not connected to the driver interlock input
d) the DC supply is off.
The thermal interlocks will reset once the AO device and / or RF driver are cooled below the switching
temperature.
- The driver thermal switch over temperature is 50deg C
- The AOM thermal switch over temperature is 35deg C
The hysterisis of the thermal switches is 7-10deg C.
Once in a fault state the coolant temperature may need to be reduced to reset the thermal switches.
Power
Adj Pot
B C
A D
LED's
