3 VMA Mode
3.6 Occupied BW Measurement
Dependencies Has no effect when the U7227A USB Preamplifier is connected. This is not annotated or reflected on
any control; there are no controls grayed-out nor any SCPI locked out. The instrument simply behaves
as though both IF Gain is set to Low regardless of the setting on the control
Not available in VXT models M9420A/10A/11A, EXM, or UXM
Couplings Auto sets IF Gain to High (ON) under any of the following conditions:
–
The input attenuator is set to 0 dB, or
–
The preamp is turned on and the frequency range is under 3.6GHz
For other conditions, Auto sets IF Gain to Low (OFF)
Preset
OFF
OFF
State Saved Saved in instrument state
Range Low Gain | High Gain
3.6.8.4 Global
The controls in this menu apply to all Modes in the instrument.
Some controls (for example, "Global Center Freq" on page 1828) allow you to switch
certain Meas Global parameters to a Mode Global state. These switches apply to all
Modes that support global settings. For example, no matter what Mode you are in
when you set Global Center Freq to ON, it applies to all Modes that support Global
settings.
Other controls (for example, Extend Low Band) are actually set in this menu, but
apply to all Modes.
Global Center Freq
The software maintains a Mode Global value called Global Center Freq.
When Global Center Freq is switched ON, the current Mode’s center frequency is
copied into the Global Center Frequency, and from then on all Modes that support
global settings use the Global Center Frequency, so you can switch between any of
these Modes and the Center Frequency remains unchanged.
Adjusting the Center Frequency of any Mode that supports Global Settings, while
Global Center Freq is ON, modifies the Global Center Freq.
When Global Center Freq is switched OFF, the Center Frequency of the current
Mode is unchanged, but now the Center Frequency of each Mode is once again
independent.
When Mode Preset is pressed while Global Center Freq is ON, the Global Center Freq
is preset to the preset Center Frequency of the current Mode.
1027 Vector Modulation Analyzer Mode User's &Programmer's Reference
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