Agilent Technologies X Series Manual page 400

Input/Output
More Information
X-series analyzers have a combined LO Out/IF In connection, whereas earlier analyzers used separate
ports for the LO Out and the IF in. Internal diplexers in the analyzer and the mixer simplify the
connection for the user – only a single SMA cable is required.
Legacy HP/Agilent and some third party mixers have separate LO In and IF out connections. This
requires you to use an external diplexer to connect these mixers. A diplexer can easily be purchased for
this purpose (for example, Diplexer Model # DPL.26 or # DPL.313B from OML Inc., Morgan Hill CA)
The connection diagram for such a legacy mixer is:
Ext Mix Setup
This menu lets you select the mixer type, and lets you configure your mixer (if necessary). While in this
menu, and any of its submenus, the External Mixer Setup screen appears, showing you the current
settings for the selected mixer. These settings may be dependent on which IF path is currently in use,
whether a + or – harmonic is currently selected, etc.
To apply any amplitude correction factors needed to correct mixer flatness, you enter values into one of
the Correction tables (under Input/Output, Corrections). The correction conversion loss values can be
400
IF INPUT/1st LO OUTPUT
SIGNAL
SOURCE
IF INPUT/
1st LO OUTPUT
SMA Cable
RF Input
SIGNAL
SOURCE
SMA Cable
LO/IF
RF Input
MIXER
MIXER
IF
diplexer
LO
SMA Cable
SMA Barrel
Agilent 11970 SERIES
HARMONIC MIXER