NARDA PMM CA0010, Руководство пользователя, Страница: 31 / 74

Setup and Panel Instructions 3-7
After the RUN1 is completed, the RUN2 begins automatically, carrying out
the measurements vs Lq limit, or, in other words, performing the heart of
the test itself.
In brackets, it is reported the max clicks number allowed (25% of the clicks
measured during Step 1).
RUN2, when carried out, always involves all four frequencies. The
maximum duration will be the same of the first run.
At the right upper corner of the screen, you can find the input attenuation
indication.
In the example above, the total attenuation is 10 dB, divided in 0 dB inside
the 9010F + 10 dB inside the 0 dB external. The value of the
external attenuator can be introduced into the main Settings page, as
explained later in this chapter.
The analyzer sets the internal attenuation automatically as required
The total amount of available internal attenuation is 80 dB in Click mode,
35 dB by the CA0010 and 45 dB by the 9010F, because also the pulse
limiter 10 dB pad is used.
Please remember that the maximum input signal allowed is 10 V
(140 dB
μ V), and that a click test may result in a potentially dangerous
condition for the input stage of the receiver.
Before to apply an unknown signal to the PMM CA0010 and 9010F
receiver, use an oscilloscope or a wide band RF voltmeter to measure
it.
If needed, add a coaxial attenuator to the input signal line.