L3 NARDA PMM 9010, User Manual

Page: 97 / 108

PMM 9030 Frequency Extension 10-25
10.12.2.2 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.
10.12.2.3 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 dB
µ
V to 90 dB
µ
V (-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 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 PM9030 the function
Smart Detector is not available.
Using 0 dB attenuation PMM 9030 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 dB
µ
V).
Before to apply an unknown signal to PMM 9030 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.