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Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide 169
Programming the Status Register System
Status Groups
Data Questionable Power Condition Register
The Data Questionable Power Condition Register continuously monitors the hardware and firmware
status of the signal generator. Condition registers are read only.
Data Questionable Power Transition Filters (negative and positive)
The Data Questionable Power Transition Filters specify which type of bit state changes in the
condition register set corresponding bits in the event register. Changes can be positive (0 to 1) or
negative (1 to 0).
Data Questionable Power Event Register
The Data Questionable Power Event Register latches transition events from the condition register as
specified by the transition filters. Event registers are destructive read-only. Reading data from an
event register clears the content of that register.
Table 4-8 Data Questionable Power Condition Register Bits
Bit Description
0
a
a.In the N5181A/82A with Option 506, the N5183A, and the E4428C/38C with Option 506, this bit is set to 0.
Reverse Power Protection Tripped. A 1 in this bit position indicates that the reverse power protection (RPP) circuit
has been tripped. There is no output in this state. Any conditions that may have caused the problem should be
corrected. Reset the RPP circuit by sending the remote SCPI command: OUTput:PROTection:CLEar. Resetting the RPP
circuit bit, resets this bit to 0.
1 Unleveled. A 1 in this bit position indicates that the output leveling loop is unable to set the output power.
2
b
b.In the N5181A/82A/83A, E4428C, E8257D/67D, and E8663B, this bit is set to 0.
IQ Mod Overdrive. A 1 in this bit position indicates that the signal level into the IQ modulator is too high.
3
c
Lowband Detector Fault. A 1 in this bit position indicates that the lowband detector heater circuit has failed.
4−14 Unused. These bits are always set to 0.
15 Always 0.
Query: STATus:QUEStionable:POWer:CONDition?
Response: The decimal sum of the bits set to 1.
Commands:
STATus:QUEStionable:POWer:NTRansition <value> (negative transition), or
STATus:QUEStionable:POWer:PTRansition <value> (positive transition), where
<value> is the sum of the decimal values of the bits you want to enable.
Queries:
STATus:QUEStionable:POWer:NTRansition? STATus:QUEStionable:POWer:PTRansition?
Query: STATus:QUEStionable:POWer[:EVENt]?