Chapter 7 Transmission Operation
Setting up the level parameters
9102 Handheld Spectrum Analyzer Software version 5.31
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The attenuation setting can be coupled to automatically follow the
reference level setting. For reference levels of –20 dBm and lower, the
attenuation is set to 10 dB; the maximum attenuation is 50 dB.
Attenuation or gain due to external coupling can be compensated by
frequency-dependent coupling factors, so that the displayed measure-
ment values reflect the power at the device under test.
Switching the display You can switch the display between absolute and relative as follows:
1 In the main menu select
Level. The Level menu is displayed.
2 Toggle the display to absolute or relative by pressing the
Display
softkey until the required display option is highlighted. If you select
abs, reference level and the unit dBm will be shown in the results
display. If you select rel, reference and the unit dB will be shown.
Setting the reference
level
1 In the main menu, push the Ref. softkey or select Level followed by
Ref. Alternatively, push the REF function key.
The Reference Level input field opens.
2 Enter the new reference level either using the numeric keys,
closing the input field with the appropriate enter key, or with the
U
P/DOWN arrow keys.
The new reference level appears at the top of the vertical axis. The
reference is based on the actual set output power.
Setting the hardware
attenuation
1 In the main menu, push the ATTN. softkey.
The Attenuation input field opens.
2 Enter a new attenuation value in the range from 0 to 50 dB (in
10 dB steps) and close the input field with one of the enter keys, or
use the U
P/DOWN arrow keys to select the attenuation value in the
range from 10 to 50 dB.
WARNING
The maximum input power level at the RF
IN connector is 30 dBm
(1 W). Higher input levels may result in serious damage of the instru-
ment.
NOTE
The attenuation value of 0 dB can be set only with the numeric keys
to avoid accidental deactivation. The 0 dB setting should be selected
carefully because too high input levels may damage the instrument.
NOTE
For precision measurements, the input power level subtracted by
the attenuation should not exceed –23 dBm.
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