User manual

A-8 Return to Section Topics 3390-900-01 Rev. C / January 2009
Appendix A: SCPI Command Reference Model 3390 Arbitrary Waveform Generator User’s Manual
Questionable Data Register
The Questionable Data Register reports information regarding possible instrument problems
(Table A-4). The Questionable Data Register is enabled by using the STAT:QUES:ENAB
<value> command. Refer to Figure A-1 for condition register, event register, and enable register
queries.
Clear the Questionable Data event register by querying the register, or with a *CLS (clear status)
command. Clear the Questionable Data enable register with the *STAT:PRES command or the
*STAT:QUES:ENAB 0 command. The instrument will also clear this enable register at power up.
Standard Event Register
The Standard Event Register reports a number of occurrences including power up, errors, and the
*OPC command (Table A-5). The Questionable Data Register is enabled by using the *ESE
<value> command. Refer to Figure A-1 for event register and enable register queries.
Clear the Standard Event event register by querying the register, or with a *CLS (clear status)
command. Clear the Standard Event enable register with an *ESE 0 command. You can also set
the instrument to clear the enable register using the *PSC 1 command; the instrument will clear
the enable register at power up.
Table A-4:
Questionable Data register
Bit Decimal value Description
0 1 Voltage overload on Output connector. Output is disabled.
1 2 Not used (always 0).
2 4 Not used (always 0).
3 8 Not used (always 0).
4 16 Not used (always 0).
5 32 Loop unlocked. Instrument frequency accuracy is affected.
6 64 Not used (always 0).
7 128 Not used (always 0).
8 256 Calibration error, calibration memory loss, or calibration is unsecured.
9 512 External time base reference is in use.
10 1024 Not used (always 0).
11 2048 Not used (always 0).
12 4096 Not used (always 0).
13 8192 Not used (always 0).
14 16384 Not used (always 0).
15 32768 Not used (always 0).
Table A-5:
Standard Event register
Bit Decimal value Description
0 1 Operation complete. All commands have completed
including the previous commands, the
*OPC command,
and the overlapping commands.
1 2 Not used (always 0).
2 4 Query error. Output buffer was empty, or previous query
was not read before new command was received, or
input and output buffers are full.
3 8 Device error. Device-specific error exists including self
test or calibration.
4 16 Execution error exists.