13-8 APD Mode Operating Instructions
13.4 Operation
The APD mode function is divided into five sub windows:
• Set
• Manual
• Report
• Start
• Defaulf
The purpose of the Set key has been already described.
Always use Esc button to return to the previous view/condition.
13.4.1 MANUAL (APD)
Pressing MANUAL key the following screen appears:
Please consider the two gray colored areas (forbidden areas) are not
represented with shadows, like in the picture above, on the equipment.
This mode of operation is useful to check the DUT and try a debugging in
real-time when needed.
From the upper left corner, the User can see if the Preselector is ON or OFF;
if the Preamplifier is ON or OFF; which attenuation is in use and the
minimum attenuation set (0 dB or 10dB or 20dB).
On the vertical axis of the graph Probability values are represented,
expressed in power of ten. The maximum value is mandatory to be 100% of
probability (10
0
).
The horizontal axis indicates Level of the signal amplitude. CISPR standard
recommends a Ref. Level (max value of the scale) equal to “Max Peak
Value + 5dB”.
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