23
Input Commands
How to Enable or Disable the ALS Function on the EDFA
COMMAND :INPut:ALS:ENABle
DESCRIPTION Enable or disable Automatic Laser Shutdown (ALS) in the event of a
loss of signal (LOS) on the amplifier input.
NOTE:
1. User should query the threshold of the LOS before enabling to
ensure that it is high enough to accommodate the current input
signal.
2. If the input detector is not present, ALS state cannot be enabled.
INPUT FORMAT :INPut:ALS:ENABle <C>,<S>,<D>,<State>
INPUT RANGE <State>
Boolean 0 - OFF
1- ON
OUTPUT FORMAT None
OUTPUT RANGE N/A
DEFAULT 1
EXAMPLE The following example queries the set threshold of the LOS and
enables the LOS monitoring of the unit on chassis 2, slot 8, device 1.
Terminal Input:
:INP:ALS:LIM? 2,8,1
-25
:INP:ALS:ENAB 2,8,1,1
ERRORS
Error Number Error Description
-224
Illegal parameter value (out of range)
-500
Invalid address or no card inserted.
-540
Invalid setting (device does not have an
input photo monitor circuit present)
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