Agilent Technologies N9913A User Manual page 152

NOTE To make swept FOPS measurements at a single frequency, choose Swept, then
enter a Src Center frequency, then Span = 0 Hz.

Invalid Settings
Violations of the following conditions will return an error message:
 The frequency span for the source and receiver must be the same.

FOPS Configuration Examples
152
Used to make swept FOPS measurements.
Swept
Then enter source (Src) frequencies as either Center and Span or Start and
o
Stop. Both methods set the FieldFox internal source sweep range out the
Port 1 RF Output connector.
The frequency limits are determined by the limits of both the FieldFox and
the power sensor.
o The LOW frequency is limited by the higher of either the FieldFox or the
power sensor minimum frequencies.
o The HIGH frequency is limited by the lower of either the FieldFox or the
power sensor maximum frequencies.
Then More.
o
Then Display. This determines how the receiver frequencies below the
Freq
o
graticules are displayed. Choose from the following:
o Start Annotated as Start and Stop frequencies.
o Annotated as Center and Span frequencies.
Center
Then choose from the following two methods to determine the offset
o
frequency (the frequency that the receiver is offset from the source). This is
typically the frequency of the LO that is used with the frequency converter.
The frequency offset may be positive, negative, or zero.
Enter an Offset frequency. The receiver frequencies are
Freq Offset
o
calculated.
Offset Calculator
o
press
Calculate Offset.
Press Rx Swp to select the receiver sweep direction.
o
o Fwd Used for systems for which the output frequency is Offs + Src. The
output frequency of the DUT and the receiver sweeps in the same
direction as the source.
o Used for systems for which the output frequency is Offs - Src. The
Rev
output frequency of the DUT and the receiver sweeps in reverse direction
as compared to the source.
Both the source and receiver frequencies must be positive.
Negative Offset, RxSwp =
Src = 2 GHz to 3 GHz
Offset = -1 GHz
Rx = 1 GHz to 2 GHz
Enter the Receiver Start and Stop frequencies. Then
(Offs + Src)
Fwd
FieldFox User's Guide