Bit Bit Name Decimal
Value
Definition
0 CV 1 Output is in constant voltage
1 CC 2 Output is in constant current
2 OFF 4 Output is programmed off
3 WTG-meas 8 Measurement system is waiting for a trigger
4 WTG-tran 16 Transient system is waiting for a trigger
5 MEAS-active 32 Measurement system is initiated or in progress
6 TRAN-active 64 Transient system is initiated or in progress
7-15 not used not used 0 is returned
Questionable Status Groups
These registers record signals that indicate abnormal operation. The groups consist of a Condition,
PTR/NTR, Event, and Enable register. The outputs of the Questionable Status groups are logically-
ORed into the QUEStionable summary bit (3) of the Status Byte register. Refer to Status Diagram.
The following table describes the Questionable1 Status register bit assignments.
Bit Bit Name Decimal
Value
Definition
0 OV 1 Output is disabled by the over-voltage protection
1 OC 2 Output is disabled by the over-current protection
2 PF 4 Output is disabled by power-fail (low-line or brownout on AC line)
3 CP+ 8 Output is disabled by the positive over-power limit
4 OT 16 Output is disabled by the over-temperature protection
5 CP- 32 Output is disabled by the negative over-power limit
6 OV- 64 Output is disabled by a negative OV due to reversed sense leads
7 LIM+ 128 Output is in positive voltage or current limit
8 LIM- 256 Output is in positive voltage or negative current limit
9 INH 512 Output is disabled by an external INHibit signal
10 UNR 1024 Output is unregulated
11 PROT 2048 Output is disabled by a watchdog timer protection
12 EDP 4096 Output is disabled by excessive output dynamic protection
13-15 not used not used 0 is returned
Keysight RP7900 Series Operating and Service Guide 241
5 SCPI Programming Reference
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