118 Chapter 2 
Front-Panel Key Reference
Input/Output
Signal ID 
Mode
  Allows you to select either of the following types of 
signal identification methods:
Key Access: 
Input/Output, Input Mixer
Image Suppress
  Selects a signal identification mode 
that attempts to suppress all but valid 
responses by mathematically removing 
all image and multiple responses of 
signals present at the mixer input. The 
analyzer internally acquires the data in 
a two sweep sequence, operates on the 
acquired data, and displays the result 
in Trace 1. Since two measurements are 
taken for each display cycle, the display 
update rate is reduced. 
Key Access: 
Input/Output, Input Mixer, 
Signal ID Mode
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.
Key Access: 
Input/Output, Input Mixer
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