Chapter 3 145
Programming the Status Register System
Status Groups
Data Questionable Modulation Condition Register
The Data Questionable Modulation Condition Register continuously monitors the hardware and firmware
status of the signal generator. Condition registers are read-only.
Data Questionable Modulation Transition Filters (negative and positive)
The Data Questionable Modulation 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).
Table 3-10 Data Questionable Modulation Condition Register Bits
Bit Description
0
Modulation 1 Undermod. A 1 in this bit indicates that the External 1 input, ac coupling on, is less than
0.97 volts.
1
Modulation 1 Overmod. A 1 in this bit indicates that the External 1 input, ac coupling on, is greater than
1.03 volts.
2
Modulation 2 Undermod. A 1 in this bit indicates that the External 2 input, ac coupling on, is less than
0.97 volts.
3
Modulation 2 Overmod. A 1 in this bit indicates that the External 2 input, ac coupling on, is greater than
1.03 volts.
4
Modulation Uncalibrated. A 1 in this bit indicates that modulation is uncalibrated.
5−14 Unused. These bits are always set to 0.
15 Always 0.
Query: STATus:QUEStionable:MODulation:CONDition?
Response: The decimal sum of the bits that are set to 1
Commands:
STATus:QUEStionable:MODulation:NTRansition <value> (negative transition),
or STATus:QUEStionable:MODulation:PTRansition <value> (positive
transition), where <value> is the sum of the decimal values of the bits you want to enable.
Queries:
STATus:QUEStionable:MODulation:NTRansition?
STATus:QUEStionable:MODulation:PTRansition?
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