6-42 Chapter6
Front-Panel Key Reference
Input/Output
Since two measurements are taken for each display
cycle, the display update rate is reduced. Key Access:
Input/Output, Input Mixer, Signal ID ModeImage Shift
Image Shift
Allows the analyzer, in a two sweep sequence, to place
data from the first sweep in Trace 1, and data from the
second (frequency shifted) sweep in Trace 2. Signal
responses of Trace 1 and Trace 2 having the same
horizontal position are considered to be in the current
band and therefore can be analyzed with the amplitude
and frequency measurement systems of the analyzer.
All other responses are invalid and should be ignored.
Key Access:
Input/Output, Input Mixer, Signal ID Mode
Mixer Config Accesses the Mixer Config menu keys allowing you to
manually set the harmonic, control the preselected
mixers, and adjust the internal bias source for use with
mixers requiring bias.
Harmonic Auto Man
The harmonic value with its associated sign is
automatically determined from the Ext Mix Band
selected when in
Harmonic (Auto) mode. Harmonic (Man)
allows you to enter a harmonic value when required. If
the harmonic mode for the external mixer is listed as
“8 –”, for example, enter the harmonic number as “– 8”.
The minus sign indicates that the tuned frequency is
below the desired LO harmonic by the IF of 321.4 MHz.
Similarly, if the harmonic mode of the external mixer is
listed as “8 +”, enter the harmonic number as “8”. Key
Access:
Input/Output, Input Mixer, Mixer Config
Mixer Type Presel Unpre
Allows you to select which type of mixer is in use. Mixer
Type (Presel) activates a tuning signal that is routed to
the
PRESEL TUNE OUTPUT connector on the rear panel
of the analyzer. This signal has a sensitivity of
1.5V/GHz and drives the tune input of the HP/Agilent
11974 series of preselected mixers. The sweep rate in
Presel mode is limited to 40 MHz/msec. Key Access:
Input/Output, Input Mixer, Mixer Config
Mixer Bias On Off
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