6
ISOMET
2.2
LED Indicator and Monitor outputs
The front panel tri-colour LED indicates the operating state.
(RF PWR ADJ) 51MHz 40MHz LED
RED
The top LED will illuminate RED when there is a poor VSWR load (High reflected RF power fault).
Normal condition is OFF
A fault signal is triggered when the reflected RF power exceeds approximately 50% of the average
forward power for more than 1 second. This fault is latching and the driver is disabled (RF power will
go to zero). This fault can occur if the RF connection between the AOM and driver is broken.
Resetting
Once the fault condition is corrected, it will be necessary to reset the driver.
1) Turn the DC power OFF and ON
or
2) Press momentary RESET button on driver located to right to the D-type
YELLOW
The middle LED will illuminate YELLOW, when the RF outputs are live and provided that
a) the Gate duty cycle is more than 20% (approx).
b) the RF average power is > 30W (approx)
Normal condition is ON,
but may be OFF if the above conditions are not met
GREEN
The lower LED will illuminate GREEN when the following signal are all true:
1) RF DC power is applied and
2) Interlocks are valid and
3) GATE input is high.
Normal condition is ON
