11-44 PMM 9030/9060/9180 Frequency Extension
11.16.2.2 Advanced
The Advanced submenu features five function buttons:
RBW Auto automatically adjust the resolution bandwidth to selected
frequency range as per the CISPR standards.
The User can also decide which resolution bandwidth use simply selecting
either one of the 2 bands available: 120 kHz or 1 MHz.
The Start and Stop frequency buttons can be used to set any frequency
interval for the measurement; to enter the frequency values press the
corresponding function keys.
Pressing either one of these 2 keys the figures 0, 1, 2, 3, and 4 are
selectable at first; with the right arrow key it is possible to select the figures
from 5 to 9, and pressing again the right arrow key the units kHz, MHz and
GHz becomes accessible, as well as the decimal dot and the Back Space.
The left arrow key can be used as well to move back and forth from one
screen to the other. Pressing 0 as the first figure the decimal dot appears
automatically.
To set a given frequency it is therefore enough to edit the value with the soft
keys and the left an right arrows, confirming the selections entering the units
value (kHz, MHz or GHz).
The figures entered appear in a small window just below the graph and the
default unit is MHz.
11.16.2.3 Level
The Level function has 4 sub-menus, each one with several options..
Pressing the Display button it is possible to set two parameters: the
visualized Dynamic range (chosen between 80, 100 and 120dB) and the
Reference Level, that can be increased or reduced by steps of 5dB within
the range +55 dBμV to 90 dBμV (-50 to - 15 dBm).
The Input button opens a submenu which is dedicated to the setting of the
input attenuator and to switch on-off the built-in preamplifier.
The PMM 9030/9060/9180 receiver takes automatically into account the
settings of all the Input parameters and always displays the correct value of
the level. The User is not required to make any correction to the readings.
With the PMM 9030/9060/9180 the function Smart Detector is not available.
Using 0 dB attenuation PMM 9030/9060/9180 has no input protection.
This is a potentially dangerous condition for the input stage of the
receiver.
Use 0 dB attenuation only if you are very sure that your input signal is
less than 1 V (or 120 dBμV).
Before to apply an unknown signal to PMM 9030/9060/9180 receiver,
use an oscilloscope or a wide band RF voltmeter to measure it. In any
case set Min. ATT at 10 dB and select the maximum available
attenuation with preamplifier OFF.
If needed, add an external coaxial attenuator on the input signal line.
In case an OVERLOAD indication occurs it is necessary to add an
external attenuator to carry on the measurement without overpassing
the declared limit for continuous power or spectral density.
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