L3Harris NARDA PMM ER8000 User Manual page 32

3.3.3 Smart The Smart Detector is a special function implemented in the PMM ER8000
Detector receiver with the purpose of reducing the test time and increasing the
productivity of the lab.
This function works only in the C, D and E bands when at least one limit
is loaded, therefore remember to enable a limit to run the Smart detector
function.
Selecting one out of the five Smart detectors the receiver will execute the
scan using at first the Peak detector and, if a peak value is found over the
selected limit minus a Margin set with the specific button, the reading is re-
measured and displayed with the chosen (C-Avg, AVG, C-Rms, RMS or
QPeak) detector.
Obviously this way of operation results in a much faster scan sweep and
moreover it immediately draws the attention of the test Engineer to the most
critical points. The limit associated to the Margin is displayed as a bold colored
line and is automatically selected by the receiver depending which Smart
detector is chosen; for example, if a Smart QP is selected, the associated QP
limit line will be displayed as a bold colored line.
To deselect the Smart Detector function simply select a single detector.
The weighting time must be properly set in the Hold Time window to
allow the Smart detectors functions to operate as intended.
The Hold Time is the measurement time the receiver takes to value the input
signal and form result weighted by the selected detector.
When using the C-Avg (CISPR-Average) or the C-RMS (CISPR-RMS)
detector, since for definition they are characterized by a long time constant, the
minimum measurement time should be set long enough to allow a correct
measurement.
For this reason, when unknown signal are to be measured, the Hold Time
should be at least 1000ms to correctly weight signals pulsed at a rate of 5 Hz
or faster, and longer for lower repetition rates.
3-4 Operating Instructions