UNI-T UTS1000 Series Operating Manual page 59

This function is invalid in zero span mode.
3.3.9.20 [Frequency marker reference level]
Set spectrum analyzer's reference level according to
amplitude at current marker.
Notes:
If "normal" marker is selected, reference level is set as
amplitude at marker.
If "frequency marker difference" marker is selected,
reference level is set as amplitude at difference marker.
3.3.9.21 [Frequency marker
Set frequency span equal to frequency of frequency marker
difference, so as to make span decrease quickly as required.
3.3.9.22 [ Frequency marker
Set spectrum analyzer's center frequency equal to frequency
marker difference.
3.3.10 PEAK
Open setup menu of peak search, and perform peak search
function.
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Notes:
If "max. value" is selected from peak search options, find
max. value on trace and mark it by marker.
The search of next peak, right peak and left peak must
satisfy search parameter conditions.
Pseudo signal generated by local oscillation feed-through
at zero frequency shall not be as peak; it shall be neglected.
3.3.10.1 [Max. value search]
Place a frequency marker at the peak of trace, and this
frequency marker's frequency and amplitude is displayed
in the upper right of screen. [Max. value search] can't
span]
change functions already activated.
center frequency]
3.3.10.3 [Left peak]
Search a peak on the left of current frequency marker's
position. Next peak must satisfy standards of current peak
3.3.10.2 [Next peak]
Move active frequency marker at the next peak contacting
with current frequency marker's position on trace. Lower
peak can be quickly found by re-pressing this key.