JDS Uniphase SCG Series User Manual page 32

ERR? Error Number
Returns the last error number that occurred. Returns 0 if the error queue is empty.
LERR? Last Number Error
Returns a three-digit error number from the error queue. The queue can contain as many as five
error numbers. The first error read is the last error that occurred. LERR? returns 0 if the error
queue is empty. This command removes the error number from the error queue, once it is read.
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-350 = queue overflow
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-330 = self-test failed
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301 = command error
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303 = invalid command
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200 = parameter error
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0 = no error
IDN? Identifier
Returns a string that identifies the manufacturer, the SCG unit model number, and the firmware
level, for example, JDS Uniphase, SCG unit, v1.20.
XDR I J Direct Drive Line Control
Sets the specified direct-drive relay line ON or OFF.
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I = driver number (1 to 8)
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J = state (1 = ON, 0 = OFF)
XDRS I Direct Drive Line Group Control
Sets all eight direct-drive relay lines ON or OFF according to the binary conversion of I. The
binary weight of the drivers is as follows:
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Driver 1 = 1
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Driver 2 = 2
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Driver 3 = 4
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Driver 4 = 8
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Driver 5 = 16
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Driver 6 = 32
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Driver 7 = 64
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Driver 8 = 128
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I = sum of the weights of the drivers to be activated; when I = 255, all driver lines are active
XDR? I Direct Drive Line Query
Programming Guide – 29