HP 132A, 53131A 0–1, 3–4, Bit, Bit, Bits, Bits, Bit 2 (Time), Bit 6 (Phase), Bit 5 (Frequency), Bit 8 (Calibration Error)

Chapter 3 Programming Your Universal Counter for Remote Operation

Elements of SCPI Commands

A detailed description of each bit in the Questionable Data/Signal Status Register Group follows:

∙Bits 0–1are not used.

∙Bit 2 (Time) is a condition bit which indicates that the Time measurements (Period, Time Interval, Rise/Fall Time, Pulse Width, and Duty Cycle) may be affected by the disabling of automatic interpolator calibration.

The condition bit is TRUE when automatic interpolator calibration is disabled. The condition bit is FALSE when automatic interpolator calibration is enabled.

∙Bits 3–4are not used.

∙Bit 5 (Frequency) is a condition bit which indicates that

Frequency measurements (this does not include the Frequency Ratio measurements) may be affected by the disabling of automatic interpolator calibration.

The condition bit is TRUE when automatic interpolator calibration is disabled. The condition bit is FALSE when automatic interpolator calibration is enabled.

∙Bit 6 (Phase) is a condition bit which indicates that Phase measurements may be affected by the disabling of automatic interpolator calibration.

The condition bit is TRUE when automatic interpolator calibration is disabled. The condition bit is FALSE when automatic interpolator calibration is enabled.

∙Bit 7 is not used.

∙Bit 8 (Calibration Error) is an event bit which indicates that one of the following has occurred: 1) an HP-IB invoked calibration failed, 2) a front- panel invoked calibration failed, 3) an automatic interpolator calibration failed during the measurement cycle, or 4) an automatic measurement calibration failed during the measurement cycle.

Since this is an event bit, the transition filters have no effect on this bit.

∙Bit 9 is not used.

Programming Guide 3-33