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The SIGID command enables a signal identifier routine that uses the normal marker to automatically identify the
signal under observation in the external mixing mode. The functions of the SIGID and KSv commands, and the
front panel [,,,, ~
keys, are identical.
A normal marker must be activated prior to executing the SIGID (external mixer signal identifier) command. The
SIGID command determines the true frequency and mixing harmonic of the signal that the marker is on.
When signal identification is complete, the CENTER FREQUENCY is changed to match the frequency of the true
signal, and CENTER FREQUENCY is left as the active function. If no identification can be made, the state before
the SIGID command was executed is automatically restored with the "RECALL 7" function. When this happens,
changing the harmonics and amplitude delta used by the signal identification routine may give better results. See
SIGDEL, NSTART and NSTOI?
If a harmonic lock is in effect when the SIGID command is executed, it is restored on completion of the SIGID
command unless the identified signal cannot be tuned to with the "locked" harmonic. In this case, the original
state, prior to executing the SIGID command, is automatically restored with the "RECALL 7" function, and the
message "IDENTIFIED OUT OF BAND" appears on the CRT
If no marker is activated prior to executing SIGID, a peak search is done looking for the highest peak.
The SIGID command syntax is shown in the sample program line below.
OUTPUT 718;"SIGID;"
Signal Identification
Programming 3 13
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