NARDA PMM CA0010, Руководство пользователя, Страница: 35 / 74

Setup and Panel Instructions 3-11
3.8.1 External
attenuator 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 9010F taking into account the value in all calculations of measured
levels.
The way to enter the value of the attenuator is the same adopted in all the
other modes (see for examples §4.2 of PMM 9010F User’s Manual).
The inserted value will be displayed together with the others automatically
adjusted by the receiver; all such attenuations values will be resumed
between brackets at the top right of the screen, where the External
Attenuator value will appear as the last shown number.
The 1
st
and the 2
nd
values between brackets are automatically assigned by
the system, according to the selected Limit, in order to guarantee the
proper input sensitivity and dynamic defined by the Standard.
The 1
st
value refers to the attenuator located into the 9010F receiver, while
the 2 nd value is the attenuator located into the CA0010.
The 3 rd value refers to the external attenuator.
The external attenuator parameter can be used also to let the system
take into account of cables and other ancillaries cumulative losses.