Aaronia SPECTRAN HF-2025, Руководство пользователя

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So far, we have only used the preset frequencies available on the various hot-
keys. However, you can also set a highly precise frequency range (so-called
sweep-range)
manually . Like this, the frequency range can be configured for
one particular application to measure only these signals. Additionally, a smaller
frequency range increases sweep speed enormously and improves accuracy.
For setting this frequency range, you only need to know the start- and stop fre-
quencies of the corresponding application and program it in SPECTRAN.
You will also find an excerpt of various radio applications along with their
start- and stop frequencies in the frequency tables on pages 64 and 65.
Subsequently, we will illustrate custom configuration using the new mobile com-
munications standard UMTS as an example. In our case, we
only want to find
and evaluate UMTS cell towers of the provider “Vodafone”.
For this, proceed as follows:
First, check the UMTS frequency list on page 65 .
UMTS uses frequencies between 1.900,1 and 2.200,0MHz. As we only want to
measure the
cell tower and not the cell phone, we only need the so-called
downlink frequency. This frequency, according to the frequency list, ranges
from 2.019,7 to 2.200,0 MHz. The Vodafone cell towers, according to the list,
only use frequencies between 2.110,3 and 2.120,2MHz. These are the start- and
stop frequencies we were looking for. Program them as follows:
Press the menu key.
Using the arrow keys, navigate to the menu entry labeled fLow .
Again, press the ENTER key.
A zero appears on the large main display. Additionally, the big status field reads
START . Now, enter the START frequency, in full MHz, using the number keys.
In this case, we want to start at 2.110,3MHz. So, enter 2110 (rounded) and cor-
rect any typos by pressing the CLR key and repeating the input. When finis-
hed, press Enter again for confirmation.
You are now being returned to the main menu. The next menu entry fHigh has
already been automatically selected.
Now, press the Enter key once more.
6.0 Setting a custom frequency range
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