Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.7 ACP Measurement
Dependencies Only appears in Dual-Attenuator models with an Electronic Attenuator installed and licensed. Does
not appear in models with the Single-Attenuator configuration, because in the Single-Attenuator
configuration there is no “electronic attenuator”; there is only a single integrated attenuator (which
has both a mechanical and electronic stage). However, in the Single-Attenuator configuration, EATT
SCPI commands are accepted for compatibility with other X-series instruments, and set a “soft”
attenuation. The “soft” attenuation is treated as an addition to the “main” attenuation value set by the
Attenuation control or :POW:ATT, and affects the total attenuation displayed on the Attenuation
control and the Meas Bar
The electronic attenuator, and the “soft” attenuation function provided in Single-Attenuator config-
urations, are unavailable above the low band (0-3.6GHz, 0-3.4GHz, 0-3GHz, depending on the
model). If the low band range is from 0-3.6GHz, and Stop Frequency of the instrument is > 3.6GHz,
then the Enabled/Disabled section of the Elec Atten control will be OFF and grayed-out
If "Internal Preamp" on page 1657 is ON (that is, set to Low Band or Full), the electronic attenuator
(and the “soft” attenuation function provided in Single-Attenuator configurations) is unavailable. In this
case the Enabled/Disabled section of the Elec Atten control will be OFF and grayed-out
If either of the above is true, and the SCPI command is sent, an error indicating that the electronic
attenuator is unavailable is returned
If both the above are true, pressing the control generates error message -221, in other words, the
frequency range lockout takes precedence
If the electronic/soft Attenuator is enabled, then the Stop Freq of the instrument is limited to 3.6GHz
and Internal Preamp is unavailable
If "LNA" on page 1658 is ON, the electronic attenuator (and the “soft” attenuation function provided in
Single-Attenuator configurations) is unavailable. In this case the Enabled/Disabled section of the Elec
Atten control will be OFF and grayed-out. This coupling works in the following modes/measurements:
–
Channel Power, Occupied BW, ACP, SEM, Spurious Emissions, Power Stat CCDF measurements
in all Modes
–
Transmit On|Off Power measurement in 5GNR Mode
–
Power vs. Time and Transmit Power measurement in GSM/EDGE Mode
–
Burst Power measurement in Spectrum Analyzer Mode
The SCPI-only “soft” electronic attenuation for the single-attenuator configuration is not available in
all measurements; in particular, it is not available in the Swept SA measurement
Couplings Enabling and disabling the Electronic Attenuator affects the setting of the Mechanical Attenuator (in
Dual-Attenuator configurations). This is described in more detail below and in "Mechanical Attenuator
Transition Rules" on page 800
Preset 0dB
State Saved Saved in instrument state
Min 0dB
Max Dual-Attenuator configuration: 24dB
Single-Attenuator configuration: the total of ATT and EATT cannot exceed 50dB. So, if the EATT is set
to 24dB first, the main attenuation cannot be greater than 26dB and will be reduced accordingly; if
the main attenuator is set to 40dB first, EATT cannot be greater than 10dB
Annotation See Annotation under the Mech Atten control description
Short Range Comms & IoT Mode User's &Programmer's Reference 799

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)