Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.8 SEM Measurement
:POW:FRAT?
Notes When you enter an amplitude value that falls between valid values, the value will be incremented to
the next smallest valid value
Dependencies Only appears if input RF is selected, RF Input Port 2 is selected, and the Full Range Attenuator exists
Couplings This value is never changed by any coupling, but other couplings use this value. See Reference Level
and "Mech Atten" on page 1639 command descriptions
Preset 20dB
State Saved Saved in instrument state
Min 0dB
Max Only valid values are 0, 6, 14, 20dB
Annotation When the Input is RF, and the Input Port is RF Input 2, and the Full Range Attenuator is installed:
On the Meas Bar, the field “Atten” displays as follows:
–
If the sweep is entirely < 50GHz, the value shown after “Atten:” is equal to Mech Atten + Elec
Atten + Full Range Atten
–
If the sweep is entirely > 50GHz, the value shown after “Atten:” is equal to Full Range Atten
–
If the sweep straddles 50GHz, the value shown after “Atten:” is preceded by the symbol “>=” and
is equal to Full Range Atten
In the Amplitude, "Y Scale" on page 1633 menu, and the Atten Meas Bar dropdown menu panel, a
summary is displayed as follows:
“Total Atten below 50GHz” followed by the value of Full Range Atten + Mech Atten + Elec Atten
“Total Atten above 50 GHz” followed by the value of Full Range Atten
For example, if Mech Atten = 6dB, Elec Atten = 4dB, and Full Range Atten = 20dB, the summary
below is shown:
–
Attenuator summary:
–
Total Atten below 50GHz: 30dB
–
Total Atten above 50GHz: 20dB
Mech Atten
Labeled Mech Atten in Dual-Attenuator models, and Atten in Single-Attenuator
models. In the Dual-Attenuator configuration, this control only affects the
mechanical attenuator.
Lets you modify the attenuation applied to the RF input signal path. This value is
normally auto-coupled to Ref Level, "Internal Preamp" on page 1657 Gain, any
External Gain that is entered, and Max Mixer Level (if available), as described in the
table below.
See "Attenuator Configurations and Auto/Man" on page 1045
Short Range Comms & IoT Mode User's &Programmer's Reference 1043

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)