Status and Events
3−6
TDS200/1000/2000 Series Oscilloscope Programmer Manual
The Enable Registers and the *PSC Command
The *PSC command controls the contents of the Enable Registers at
power on. Sending *PSC 1 sets the Enable Registers at power on as
follows:
H DESER 255 (equivalent to a DESe 255 command)
H ESER 0 (equivalent to an *ESE 0 command)
H SRER 0 (equivalent to an *SRE 0 command)
Sending *PSC 0 lets the Enable Registers maintain their values in
nonvolatile memory through a power cycle.
NOTE . To enable the PON (Power On) event to generate a Service
Request (GPIB only), send *PSC 0, use the DESe and *ESE
commands to enable PON in the DESER and ESER, and use the
*SRE command to enable bit 5 in the SRER. Subsequent power-on
cycles will generate a Service Request (GPIB only).
Queues
The oscilloscope status and event reporting system contains two
queues: the Output Queue and the Event Queue.
The Output Queue
The Output Queue stores query responses waiting to be output. The
oscilloscope empties the Output Queue each time it receives a new
command or query message. This means you must read any query
response before you send the next command or query, or you will
lose responses to earlier queries. Also, an error may result.
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