Agilent Technologies X Series Manual page 409

Key Path
Initial S/W Revision
Harmonic
This lets you enter the Harmonic value with its associated sign (mixing mode).
The harmonic number is a signed integer, where the sign has the meaning of choosing between positive and
negative mixing products. Desired mixing products occur at an IF frequency which equals the difference between
the RF frequency (f and the LO frequency (Nf
RF)
When this difference is negative, we can say f
tuned such that the harmonic of the LO is higher than the indicated frequency by the frequency of the first IF. A
positive harmonic means the analyzer will be tuned such that the harmonic of the LO is lower than the indicated
frequency by the frequency of the first IF.
Key Path
Remote Command
Example
Notes
Couplings
Preset
State Saved
Min
Max
Initial S/W Revision
LO Doubler
This lets you enter the LO Doubler setting. The LO Doubler setting controls the choice of the LO doubler state for
LO's which support doubled operation.
In LO's which support doubling, the fundamental band is 3.8 – 8.7 GHz. The doubled band is 8.6 – 14 GHz. The
higher LO frequency can result in a lower mixer harmonic and reduced mixer conversion loss.
Key Path
Remote Command
Input/Output, External Mixer, Ext Mix Setup
A.08.01
). When this difference is positive, we can say f
LO
= Nf f . Thus, a negative harmonic means the analyzer will be
IF LO RF
Input/Output, External Mixer, Ext Mix Setup, Edit Harmonic Table
[:SENSe]:MIXer:HARMonic <integer>
[:SENSe]:MIXer:HARMonic?
:MIX:HARM –28
:MIX:HARM?
The query returns the harmonic value of the first row of the harmonic table.
When you set a value for the Harmonic, the Mixer Selection changes to
"Custom"
This is unaffected by Mode Preset, but on a "Restore Input/Output Defaults"
editing is turned off, the Harmonic Table returns to normal, and the Mixer is
preset to 11970A, which has –6 in the first row of its Harmonic Table
Saved in State
–400
400
A.08.01
Input/Output, External Mixer, Ext Mix Setup, Edit Harmonic Table
[:SENSe]:MIXer:LODoubler ON|OFF|0|1
[:SENSe]:MIXer:LODoubler?
Input/Output
= f Nf .
IF RF LO
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