Agilent Technologies X Series Manual page 408

Input/Output
Mixer Bias
Adjusts an internal bias source for use with external mixers. The bias signal is present on the center
conductor of the IF input connector on the front panel. The shunt current range is from –10 mA to 10 mA
and it can be set whether Mixer Bias state is On or Off, but it will only be applied if it is On.
The bias remains as set if the user switches to another input (e.g., the RF Input).
Key Path
Remote Command
Example
Preset
State Saved
Min
Max
Initial S/W Revision
Edit Harmonic Table
This menu lets you directly configure the Harmonic number and LO Doubler state of your mixer.
Whenever you edit the table, you are forced into "single harmonic" mode, and only a single row is
displayed in the Harmonic table.
When you press the Edit Harmonic Table softkey, a dialog pops up on the display informing you that
only single-range editing is supported, and that to undo your changes you must go to the Mixer Presets
menu and choose the preset appropriate for your mixer. You may cancel out of this dialog and not enter
the Edit Harmonic Table menu. If you choose to enter the menu, the table collapses to a single row, and
the Mixer Selection changes to "Custom".
In Custom mode, your maximum start and stop frequencies are strictly set by the LO range and the
harmonic number you have chosen. The undoubled LO range is 3.8 – 8.7 GHz, and the doubled range is
8.6 – 14 GHz. That range times the harmonic you have selected will determine your tuning range. If your
frequency is currently outside that range when you edit the Harmonic Table, your frequency will be
changed to fall at the edge of the range. To change it back you must go into the Mixer Presets menu and
select a Preset.
Whenever you are in the
a white background, indicating that it can be edited. So also does the LO Doubler field.
408
Input/Output, External Mixer, Ext Mix Setup
[:SENSe]:MIXer:BIAS <real>
[:SENSe]:MIXer:BIAS?
[:SENSe]:MIXer:BIAS:STATe OFF|ON|0|1
[:SENSe]:MIXer:BIAS:STATe?
:MIX:BIAS 0
:MIX:BIAS?
MIX:BIAS:STAT 0
MIX:BIAS:STAT?
This is unaffected by Preset but is set to OFF and 0 on a "Restore Input/Output
Defaults"
Saved in state
–10 mA
10 mA
A.08.01
Edit Harmonic Table menu, the Harmonic field in the first row of the table has