Agilent Technologies X Series Manual page 469

The signal quality, such as signal to noise ratio and phase noise, are excellent in this mode.
Key Path
Example
Dependencies
Readback Text
Initial S/W Revision
Arbitrary IF
nd
In this mode the 2 IF output is mixed with a local oscillator and mixer to produce an arbitrary IF output
between 10 MHz and 75 MHz with 500 kHz resolution. The phase noise in this mode will not be as good
as in Second IF mode.
The IF output frequency is adjustable, through an active function which appears on the Arbitrary IF
selection key, from 10 MHz to 75 MHz with 500 kHz resolution.
The bandwidth of this IF output varies with band and center frequency, but is about 40 MHz at the –3 dB
width. When the output is centered at lower frequencies in its range, signal frequencies at the bottom of
the bandwidth will "fold". For example, with a 40 MHz bandwidth (20 MHz half-bandwidth), and a 15
MHz IF center, a signal –20 MHz relative to the spectrum analyzer center frequency will have a relative
response of about –3 dB with a frequency 20 MHz below the 15 MHz IF center. This –5 MHz frequency
will fold to become a +5 MHz signal at the IF output. Therefore, lower IF output frequencies are only
useful with known band-limited signals.
Key Path
Example
Dependencies
Readback Text
Initial S/W Revision
Key Path
Scope
Remote Command
Example
Preset
State Saved
Input/Output, Output Config, Aux IF Out
OUTP:AUX SIF
causes the aux output type to be Second IF
Does not appear unless Option CR3 is installed.
Second IF
A.04.00
Input/Output, Output Config, Aux IF Out
OUTP:AUX AIF
causes the aux output type to be the Arbitrary IF
Does not appear unless Option CRP is installed.
Arbitrary IF
A.04.00
Input/Output, Output Config, Aux IF Out
Mode Global
:OUTPut:AUX:AIF <value>
:OUTPut:AUX:AIF?
:OUTP:AUX:AIF 50 MHZ
This is unaffected by a Preset but is set to 70 MHz on a "Restore Input/Output
Defaults" or "Restore System Defaults->All"
Saved in Input/Output State
Input/Output
469