Keysight U2040 X Series, User Manual, Page: 57 / 91

General Operating Information 2
Keysight U2040 X-Series User’s Guide 57
Table 2-1 Power meter settings in the Average only mode description
Item Description
Presets – Preset the instrument to its default values or values appropriate for measuring the communications format.
The data stored in the correction (FDO, gamma, and S-parameter) tables, the selected correction table, and the zeroing and
calibration data are not affected by a preset.
– Perform a system reset.
Channel Setup – Set the channel mode to the Normal or Average Only mode.
– Set the measurement frequency.
– Set the aperture size.
– Set the channel offset which is applied to the measured power prior to any mathematical functions. Refer to “ Simplified
Measurement Path ” on page 84 .
– Set the duty cycle.
– Set the automatic or manual measurement average mode. The number of readings averaged can range from 1 to 1024.
Increasing the value of the measurement average reduces measurement noise, but increases measurement time. The
measurement average filter can also be reset. Refer to “ Typical Averaged Readings ” on page 85 .
Calibration Auto-calibrate the U2040 X-Series without having to connect it to a power reference, or auto-zero the U2040 X-Series
internally or externally.
Internal zeroing can be performed with or without the RF/microwave signal present, while external zeroing must be performed
without any RF/microwave signal present.
Measurement – Run/stop the measurement.
– Set the logarithmic (dBm) or linear (Watt) measurement unit.
– Set the measurement offset factor. The U2040 X-Series corrects every measurement by this factor to compensate for the
gain/loss.
– Enable the relative mode, which computes the measurement result relative (as a ratio) to a reference value. When enabled,
the reference value can be set using the < Rel > control. The relative reading is displayed in either dB or %.
– Measurement feed operation is not available in the Average only mode.
Trigger Setup – Set the single, free run, or continuous trigger mode. The free run mode does not allow any trigger setup.
– Set the trigger source to an external source in the single or continuous trigger mode.
– Set the delay time to be applied between the trigger event and all the gate start times. This allows you to time-shift all the
gates by the same amount with one setting change.
– Select the positive or negative slope type to determine if the trigger event is recognized on the rising or falling edge of a
signal respectively.
– Set the holdoff time to disable the trigger mechanism after a trigger event occurs.
– Set the qualification value.