- HP Vacuum Cleaner User Manual

a 1 in the source Output Queue. The program waits at line 410 until
the 1 returned by *OPC? is entered.
Note that following each OUTPUT containing a query is an ENTER to
retrieve the queried value. If you do not use paired OUTPUTS and
ENTERS, you can overwrite data in the instrument Output Queue and
generate instrument errors.
470 to 480: Disconnect output terminals of the instruments from the
unit under test, and end the program. All HP BASIC programs must
have END as the last statement of the main program.
l-78 Getting Started Programming