Technical data

Programming the Status Register System 4
Agilent N8211A/N8212A Performance Upconverter Synthetic Instrument Module, 250 kHz to 20 / 40 GHz 125
Data Questionable Modulation Condition Register
The Data Questionable Modulation Condition Register continuously monitors the hardware
and firmware status of the N8211A/N8212A. 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).
Data Questionable Modulation Event Register
The Data Questionable Modulation 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 10 Data Questionable Modulation Condition Register Bits
Bit Description
0 Modulation 1 Undermod. A 1 in this bit position indicates that the External 1 input with ac coupling
on, is less than 0.97 volts.
1 Modulation 1 Overmod. A 1 in this bit position indicates that the External 1 input with ac coupling on,
is more than 1.03 volts.
2 Modulation 2 Undermod. A 1 in this bit position indicates that the External 2 input with ac coupling
on, is less than 0.97 volts.
3 Modulation 2 Overmod. A 1 in this bit position indicates that the External 2 input with ac coupling on,
is more than 1.03 volts.
4 Modulation Uncalibrated. A 1 in this bit position indicates that modulation is uncalibrated.
5−14 Unused. This bit is always set to 0.
15 Always 0.
Query: STATus:QUEStionable:MODulation:CONDition?
Response: The decimal sum of the bits 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?