NARDA PMM ER9000, User Manual

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8-4 Click Mode Operating Instructions
8.4.3 Calculate Limit
Quartile
When the click rate N is determined it is possible to calculate the click limit
Lq by increasing the relevant limit (quasi-peak) L for continuous
disturbances with:

44 dB for N<0,2, or

20 log (30/N) dB for 0,2<N<30
Therefore
N
Log L L
q
30
20
⋅ + =
8.4.4 Measurement vs.
Lq limit Now the test can be done at the 4 fixed frequencies dictated by the
standard: 150 kHz, 500 kHz, 1.4 MHz, 30 MHz, and the results compared
with the limit Lq.
If less than 25% of the clicks measured exceeds the limit Lq, then the test
is positive, otherwise it fails.
The PMM ER9000 can now produce an extensive report with all the
relevant data.
8.5 Start
As soon as the Setup has been done, it is possible to start the test.
First of all the analyzer will determine the click rate N, and – if all the
conditions apply – after that the analyzer will immediately continue
measuring the number of clicks exceeding the upper quartile limit L
q
.
Simply select Start : the PMM ER9000 will automatically take care of all the
necessary steps, reporting at the end of the test all the relevant results.
During the test, the evolution of the measurements can be continuously
controlled in the Data and Details windows, where all the info are duly
provided.
At any time, it is possible to
Stop the measure or to Pause it.
The PMM ER9000 does the determination of the click rate at the two
frequencies of 150 kHz and 500 kHz or at all the four frequencies,
depending on the Operator’s choice.
The PMM ER9000 does the determination of the click rate at the two
frequencies of 150 kHz and 500 kHz or at all the four frequencies,
depending on the Operator’s choice.