Using Unleveled Operating Modes; Alc Off Mode - Keysight Technologies N5171B EXG User Manual

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Using Unleveled Operating Modes

Using Unleveled Operating Modes

Figure 4-23 Power Search and ALC Off Softkeys
Only available when
I/Q is on.
These
softkeys are
only active
when an ARB
waveforms is
playing in
memory.
Available only when
ALC = Off

ALC Off Mode

Turning ALC off deactivates the signal generator's automatic leveling circuitry. Turning ALC off is
useful when the modulation consists of very narrow pulses that are below the pulse width
specification of the ALC or when up converting external IQ signals and the modulation consists of
102
N5173B/83B only
page 85
See
Sets the allowed
settling error.
Keysight EXG and MXG X-Series Signal Generators User's Guide
Auto: The calibration routine executes whenever
output frequency or amplitude changes.
Span: Pressing Do Power Search executes the
power search calibration routine once over a
selected frequency range.
The corrections are stored and used whenever you
tune the signal generator to within the calibrated
frequency range.
Manual: User must explicitly execute a power
search to calibrate the open loop ALC level.
Available only when
Power Search Reference =
Manual
Available only when
Power Search = Span
User: Enables the
user to set the
signal generator
frequency settings.
Full: The signal
generator selects
its full frequency
range for the power
search.
N5173B/83B only
Only available when
I/Q is on.
For details on each key, use key help as described on
RMS: Value is a DC
bias equivalent to the
value derived from the
file header or the
calculated value from
the current I/Q data.
Fixed: Uses a fixed 0.5
Vrms value (Same
value is used with Ext
I/Q data).
Manual: Allows user to
specify the DC bias
voltage value
(0–1.414 Vrms).
Modulated: Uses the
AC bias from the actual
modulating signal.
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