162 Chapter 2
Instrument Functions: A - L
Input/Output
Instrument Functions: A - L
2.8.8.2 Image Shift
Does signal identification in a two sweep sequence. Places 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 Path:
Input/Output, External Mixer, Signal ID Mode
State Saved: Saved in Instrument State
Remote Command:
See “Signal ID Mode” on page 161
Example: SID:MODE ISH
2.8.9 Mixer Config
Displays the Mixer Config menu keys to manually set the harmonic, select the preselected
mixers or unpreselected mixers, and adjust the internal bias source for use with mixers
requiring bias.
Key Path:
Input/Output, External Mixer
State Saved: Saved in Instrument State
2.8.9.1 Harmonic
The harmonic mixing number, its associated sign, and the availability of mixer bias can be
automatically controlled by setting
Harmonic to Auto. In Auto, the harmonic number and
sign are determined by the
Ext Mix Band selected. For bands A, Q, U and V, they are
determined by the
Ext Mix Band and by whether Mixer Type is set to preselected or
unpreselected. There are no auto rules for
Ext Mix Band set to Auto, therefore, selecting
Auto forces Ext Mix Band to A band.
The harmonic number indicated is a signed number. Positive numbers (sign not displayed)
indicate that the tuned frequency is above the desired LO harmonic by the 321.4 MHz IF.
Negative numbers indicate an LO harmonic below the tuned frequency by the 321.4 MHz
IF.
Key Path:
Input/Output, External Mixer, Mixer Config
State Saved: Saved in Instrument State
Factory Preset: Auto
Range: –50 to 50, can not be set to 0.
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