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3 Short-Range Comms & IoT Mode

3.2 Modulation Analysis Measurement

[:SENSe]:POWer[:RF]:ATTenuation:STEP[:INCRement]?

Example

:POW:ATT:STEP 2

:POW:ATT:STEP?

Notes Has a toggle control on the front panel, but takes a specific value (in dB) when used remotely. The only

valid values are 2 and 10

Dependencies Blanked in EXA, CXA and CXA-m if option FSA (2dB steps) is not present. If blanked, attempts to set it

via SCPI yield an error

Couplings When the attenuation step size changes, the current mechanical attenuation value is adjusted (if

necessary) to be quantized to the new step size. That is, if step is set to 10dB, mech atten is increased

if necessary so it is a multiple of 10dB

Preset EXA, CXA and CXA-m: 10dB (2dB with option FSA)

All other models: 2dB

State Saved Saved in instrument state

3.2.3.3 Range (Baseband Input models)

Only available when Option BBA is present (I/Q Baseband Inputs), the current

measurement supports option BBA, and I/Q is the selected input. In these cases,

replaces the Attenuation tab.

Each input channel (I and Q) has four internal gain ranges. The maximum allowed

voltage in each gain range is slightly more than the nominal value, so the break

point between ranges is a few millivolts higher than the nominal (setting a peak

voltage of 0.502mV will still map to the 0.5V Peak range).

Gain Setting Volts RMS Volts Peak Volts Peak - Peak dBm (50Ω ) Break Point

0 dB 0.7071 1.0 2.0 10 n/a

6 dB 0.3536 0.5 1.0 4 0.502 V Peak

12 dB 0.1768 0.25 0.5 -2 0.252 V Peak

18 dB 0.0884 0.125 0.25 -8 0.127 V Peak

Dependencies Available only when the selected input is I/Q. If the current measurement does not support baseband

inputs, an error will be displayed: “No result; Meas invalid with I/Q inputs”

State Saved No

Range Auto/Man

The Auto setting for Range causes the range to be set based on the Y Scale settings.

When Range is Auto, the I & Q Range are set based on the top of the Y Scale when

the Y scale is in dB units (for example, power), or to the max(abs(top), abs(bottom))

when the Y scale reference is not at the top of the screen.

218 Short Range Comms & IoT Mode User's &Programmer's Reference

Keysight x-series Instruction Manual

Other manuals for Keysight x-series