Chapter 2 117
Front-Panel Key Reference
Input/Output
Signal Ident 
On Off
  Activates a signal identification algorithm when 
Signal Ident (On) is selected, that either removes or aids 
with the identification of multiple and image responses 
of true input signals. Multiple and image responses 
maybe generated when using unpreselected external 
mixers.
Key Access: 
Input/Output, Input Mixer
NOTE Segmented sweep is not available when Signal Ident (On) is selected.
NOTE If the input signal is too broad band or unstable for the identification 
process to properly identify it, turn off the signal identification and look 
for two similar responses separated by approximately 642.8 MHz (twice 
the 321.4 MHz first IF). If a “–” mixer mode (for example: 8–) is active, 
the right member of the response pair is the correct response; if a “+” 
mixer mode is active, the left member of the response pair is the correct 
response.
The amplitude accuracy of the analyzer is degraded 
when signal identification is active, and the message 
Signal Ident On, Amptd Uncal will appear on the 
display.