L3Harris NARDA PMM ER8000 User Manual page 78

8.6 Report
8.6.1 Fail during
determination of
the click rate N
8.6.2 Report after a
successful test with
less than 5
instantaneous
switching at one
frequency
8.7 Setup
8.7.1 External
attenuator
8.7.2 Limit
8-6 Click Mode Operating Instructions
After a Click test the PMM ER8000 reports all the relevant data.
Due to the complexity of the test and to the various conditions that may
happen during the measurement, several reports may be issued.
In case a test failed condition is recorded during the determination of the
click rate N during the first Run, the report will show the situation. In this
case there is no need to go on testing that specific frequency/frequencies.
If the determination of the click rate N shows that at a given frequency there
are less than 5 instantaneous switching operations, there is no need of any
further test at that frequency or frequencies (the investigation frequencies
are 150 kHz for the interval from 150 to 500 kHz, and 500 kHz for the
interval from 500 kHz to 30 MHz).
Due to the complexity of the discontinuous disturbance test, this panel is
rather complex, as many parameters shall be defined.
However, the PMM ER8000 has been designed to be extremely user-
friendly and to take care in a fully automatic way of all the necessary steps
of the test.
Due to the fact that the Standard fixes the frequencies at which the
test shall be done, these frequencies have been uniquely assigned by
factory and the User cannot modify them; nevertheless it is possible
to select an arbitrary Frequency Value for "Idle Mode" instead, useful
for debugging purposes.
From the main Click Analysis window, select START and the main Setup
panel will be displayed.
The User can navigate through the different parameters to set the desired
values.
In case an external attenuator is used to protect the input of the analyzer,
the value of this attenuator can be entered, in order to have the PMM
ER8000 taking into account the value in all calculations of measured levels.
The way to enter the value of the attenuator is shown in the CA0010 User's
Manual.
Three most used limits are built-in into the analyzer: CISPR 14, CISPR22
and CISPR11.
Either one can be selected simply by the drop down menu.
The limit will be loaded and all the calculations will be done with reference
to the selected limit:
The Reference Standard for Click tests is always EN 55014-1 (or
equivalent CISPR 14-1), which defines 4 different Limit Curves for Q-Peak
according to Table 1, with following cross-correlation as for names
assigned on ER8000 :
014-1 --> Limit in Column 2
014-2 --> Limit in Column 6
014-3 --> Limit in Column 8
014-4 --> Limit in Column 10
Limit in Column 4 of Tab.1 is not used for Click test, as referred to
Load and Auxiliary terminals.