Chapter 7 Transmission Operation
Setting up the level parameters
124 9102 Handheld Spectrum Analyzer Software version 5.31
Changing the vertical
scale
The scale for the vertical axis (power) can be changed in the range
from 1 to 20 dB per division (vertical line in the displayed grid) in 1-3-
5 steps as follows:
1 In the main menu, select
Level.
2 Push the
Scale softkey.
The Scale input field opens.
3 Select a new scale by entering a new number of dB per division
numerically and pressing the E
NTER or MHZ/DB/ΜS key, or by
pushing the U
P/DOWN cursor keys.
Compensating gains and
losses
If the device under test is connected to the 9102 Handheld Spectrum
Analyzer via an amplifier or a device attenuating the signal, such as an
antenna or a long cable, the measurement results are wrong by the
gain or loss factor. This factor may be a constant or even frequency-
dependent.
To view the correct measurement results, the gain or loss can be
compensated. The 9102 can even compensate a frequency-depen-
dent factor; a correction curve or table can be entered on an external
PC using the 9100 Data Exchange Software and loaded to the 9102.
The section “Defining and loading external coupling parameters” on
page 243 explains this part in more detail.
Enabling external device
compensation
Once correction values are stored in the 9102, these can be selected
and activated as follows:
1 In the main menu, select
Level > Ext. Dev. Memory.
2Press
Recall Ext. Dev. Comp.
A pull-down menu appears with a list of names for the compensa-
tion tables available in the 9102.
3 Select a compensation table using the U
P/DOWN cursor keys and
confirm your choice by pressing E
NTER.
Compensation is still off, but the 9102 changes automatically to the
Level menu.
4 Push the
Ext. Dev. Comp. softkey until “on” is highlighted.
The text “Ext. Dev.”, together with the name of the file loaded,
appears on the upper left-hand corner of the results display.
Turning external device
compensation off
1 In the main menu, select the
Level menu.
2Press
Ext. Dev. Comp. until “off” is highlighted.
The text “Ext. Dev.” to the left of the results display disappears.
NOTE
Steps 1 thru 3 may be omitted if a file had been previously selected.
In this case, select the
Level menu and continue with step 4.
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