The Questionable Data Register - Keysight 34420A User Manual

The standard event register is cleared when:
– You send a *CLS (clear status) command.
– You query the event register using the *ESR? (event status register) command.
The standard event enable register is cleared when:
– You turn on the power and you have previously configured the meter using the
– You execute a *ESE 0 command.
The standard event enable register will not be cleared at power-on if you have
previously configured the meter using *PSC 0.

The Questionable Data Register

The questionable data register provides information about the quality of the
meter's measurement results. Overload conditions can be reported in the
questionable data summary bit through the enable register. You must write a
decimal value using the STATus:QUEStionable:ENABle command to set the enable
register mask.
A reading overload condition is always reported in both the standard event
NOTE
register (bit 3) and the questionable data event register (bits 0, 1, or 9). However,
no error message is recorded in the meter's error queue.
Bit Definitions — Questionable Data Register
Bit
0 Voltage Overload
1 Not Used
2 Not Used
3 Not Used
4 Temperature Overload
5 Not Used
6 Not Used
Keysight 34420A User's Guide
*PSC 1 command.
Decimal Value
Remote Interface Reference
Definition
1 Range overload on dc vol ts
2 Always set to 0.
4 Always set to 0.
8 Always set to 0.
16 Range overload on temperature measurements.
32 Always set to 0.
64 Always set to 0.
4
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