3 Short-Range Comms & IoT Mode
3.11 IQ Waveform Measurement
3.11.4 BW
Opens the BW (Bandwidth) menu. The Digital IF BW functions control filter
bandwidth and filter type. There are two filter types: Gaussian and Flattop. The
Gaussian filters have a response curve that is parabolic on a log scale. The Flattop
filter shape is a close approximation of a rectangular filter.
3.11.4.1 Settings
Contains the basic bandwidth functions. It is the only tab under Bandwidth.
Digital IF BW
Sets the Digital IF (formerly Info BW) bandwidth of the instrument. When in Auto, it
is set to the value that covers carriers set by carrier configuration.
Remote Command
[:SENSe]:WAVeform:DIF:BANDwidth <freq>
[:SENSe]:WAVeform:DIF:BANDwidth?
Example
:WAV:DIF:BAND 1kHz
:WAV:DIF:BAND?
Notes Auto/Man is available only for 5G NR, LTE, LTETDD, LTEAFDD, LTEA TDD Modes
Dependencies To set a 2 GHz Span with option R20, the Center Frequency must be equal to or greater than 3.5 GHz
To set a 4 GHz Span with option R40, the Center Frequency must be equal to or greater than 10 GHz
For applications that have the IF Path Selection menu, such as the BASIC mode:
IF Path
Auto
State
Maximum Value Criteria
OFF
The maximum value depends on which IF Path is currently selected
If 10 MHz, 25 MHz, 40 MHz, 85 MHz, 125 MHz, 140 MHz or 160 MHz, 255 MHz, or
510 MHz paths are selected, the maximum value of this parameter is 10, 25, 40,
85, 125, 140 or 160 MHz, 255 MHz, or 510 MHz respectively
ON
The maximum value is the maximum Digital IF BW available in the instrument,
regardless of the current IF Path Selection
For example, if the instrument has the options B25, B40, and B1X installed, the
maximum available Digital IF BW of the instrument is 160 MHz. Thus, if IF Path
Auto is ON and IF Path Selection is 25 MHz, the maximum Digital IF BW is not
limited to 25 MHz, but is 160 MHz
Couplings Changing "Sample Rate" on page 1596 automatically changes the state to Man
Preset See "Preset Values" on page 1563 below
Short Range Comms & IoT Mode User's &Programmer's Reference 1561
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