Questionable Data Register
The overload bits are set once per INITiate command. If you clear an overload bit, it is not set again until a
new INITiate is sent.
Bit number Bit name Decimal value Definition
0 Voltage Overload 1 A voltage measurement overloaded. Event only; condition register will return 0.
1 Current Overload 2 A current measurement overloaded. Event only; condition register will return 0.
2 Sample Timing Violation 4 A sample timing violation has occurred involving the SAMPle:TIMer command in
single channel DMM digitizing mode. Sample timing may not be valid.
3 Not Used 8 (Always returns 0)
4 Not Used 16 (Always returns 0)
5 Frequency Overload /
Underflow
32 A frequency or period measurement overloaded or timed out due to no signal.
Event only; condition register will return 0.
6 Not Used 64 (Always returns 0)
7 Capacitance Overload 128 A capacitance measurement overloaded. Event only; condition register will
return 0.
8 DMM Calibration Corrupt 256 At least one DMM calibration constant is corrupt.
9 Resistance Overload 512 A resistance measurement overloaded. Event only; condition register will return
0.
10 Temperature Overload 1024 A temperature measurement overloaded. Event only; condition register will
return 0.
11 Totalizer Overflow 2048 A totalizer channel has overflowed its maximum count. Event only; condition
register will return 0.
12 Reading Memory Over-
flow
4096 Reading memory is full. One or more (oldest) measurements have been lost.
13 Not Used 8192 (Always returns 0)
14 Not Used 16384 (Always returns 0)
15 Not Used 32768 (Always returns 0)
Keysight DAQ970A/DAQ973A Programming Guide 293
2 SCPI Programming
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