Keysight Technologies N5171B EXG, Руководство пользователя

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102 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Optimize Performance
Using Unleveled Operating Modes
Using Unleveled Operating Modes
Figure 4-23 Power Search and ALC Off Softkeys
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
Available only when
ALC = Off
Available only when
Power Search Reference =
Available only when
Power Search = Span
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.
For details on each key, use key help as described on
page 40
.
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.
Manual
User : Enables the
user to set the
signal generator
frequency settings.
Full : The signal
generator selects
its full frequency
range for the power
search.
Only available when
I/Q is on.
These
softkeys are
only active
when an ARB
waveforms is
playing in
memory.
Manual : User must explicitly execute a power
search to calibrate the open loop ALC level.
See
page 85
Sets the allowed
settling error.
Only available when
I/Q is on.
N5173B/83B only
N5173B/83B only