ADInstruments AD8000 Series Instruction Manual page 116

AD8000 Series Spectrum Analyzer Instruction
Manual
Turn off all adjacent channel limits with the master switch. To turn on
certain adjacent channel, the master switch and its switch must be used
together.
The limit of adjacent channel power includes absolute and relative limit.
Absolutely limit is for the real power of adjacent channel; relative limit is
about the differential power of adjacent channel and the carrier power.
When the adjacent channel power is less than the absolute limit, it is
absolutely qualified; when the relative value is less than the value of the
relative limit, it is relatively qualified. Qualified, unqualified and not enable
are marked by green, red and white.
Each pair of adjacent-channel limit has four models, absolute, relative, both
and or.
Absolute mode: absolutely qualified is qualified
Relative mode: relatively qualified is qualified
Both mode: absolutely and relatively qualified is qualified Or
mode: either absolutely or relatively qualified is qualified
Only when both left and right adjacent channels are qualified, the pair of
adjacent channel is qualified. The limit comprehensive result inspection
shows whether all active adjacent channels are qualified. The
comprehensive result is qualified only if all active adjacent channels are
qualified in the selected mode. Qualified, unqualified and not enable are
marked by green, red and white.
The function of 'Restore Default' key is the same as it in parameter setting,
which is to set the limit to the default limit of the current signal.
Setting as figure 3-85, the measurement result of figure 3-86 could be
gotten. There are 6 pairs of adjacent channel. 1 is relatively qualified, 2 is
absolutely qualified, 3 is both qualified, and 4 is or qualified. Channel 5 and
6 are limit function turning-on and comprehensive measurement result
qualified.
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