6 Input/Output
6.2 Input
Couplings When you set a value for Harmonic via SCPI, the Mixer Selection changes to Custom
Preset Unaffected by Mode Preset, but Restore Input/Output Defaults turns editing 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
State Saved Saved in instrument state
Min -400
Max 400
6.2.13.7 LO Doubler
Lets you specify whether the Doubler is on or off. Only the first row of the table is
editable, and the LO Doubler field is only editable in Single Row and Harmonic
Switching table types. When you edit a value or change the Table Type, the Mixer
Selection changes to Custom.
The LO Doubler setting controls the choice of the LO doubler state for LO’s that
support doubled operation. In Single Row mode it is either on or off for the one row
in the table. In Harmonic Switching mode it is on for both rows or off for both rows.
In Doubler switching it is off for row 1 and on for row 2, so it is not editable.
In LOs that support doubling, the fundamental band is approximately 3.8 – 8.7 GHz,
and the doubled band is approximately 8.0 – 14 GHz. The higher LO frequency can
result in a lower mixer harmonic and reduced mixer conversion loss.
Remote Command
[:SENSe]:MIXer:LODoubler ON | OFF | 0 | 1
[:SENSe]:MIXer:LODoubler?
Example
:MIX:LOD 0
:MIX:LOD?
Notes The query returns the doubler value of the first row of the harmonic table
Dependencies Grayed-out and set to OFF when "Table Type" on page 2368 is set to Doubler Switching
Grayout message: “-221 Settings conflict; Function unavailable while Table Type=Doubler Switching”
Couplings When you set a value via SCPI, the Mixer Selection changes to Custom
Preset Unaffected by Mode Preset, but Restore Input/Output Defaults turns off editing, the Harmonic Table
returns to normal, and the Mixer is preset to 11970A, which has the doubler Off in the first row of its
Harmonic Table
State Saved Saved in instrument state
6.2.13.8 Refresh USB Mixer Connection
Re-reads the USB devices and refreshes connection to Keysight USB mixers. This
operation is the same as physically removing and reinserting the mixer’s USB
connection.
Spectrum Analyzer Mode User's &Programmer's Reference 2371
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