A
zero
appears in the main display. Additionally, the status field reads
STOP
.
Now, enter the STOP frequency, in full MHz, using the number keys. In our case,
we want to measure up to 2.120,2MHz. So, enter
2121
(rounded up) and press
Enter again for confirmation.
You are now being returned to the main menu. The next menu entry
RBW
has already been automatically selected.
Again, press the Enter key.
Now, a list of various filter bandwidth is displayed.
3MHz
has been chosen automatically and is ideal for measurement of cell
towers. Thus, you can confirm this setting by pressing Enter.
You are now being returned to the main menu.
Finally, press the menu key again, and all settings are being confirmed and
the sweep (measurement) starts! The big status field reads
CUSTOM
, indicating
a custom configuration.
Now,
only
the configured frequency range between
2.110 and 2.121MHz
is
being sweeped (measured), thus all operation modes (exposure limit calculati-
on, spectrum display) now
only
refer to this frequency range!
Now, you can
precisely
evaluate
if
a Vodafone UMTS cell tower is active
and
how strong the exposure exactly is. Using the HyperLOG antenna, you can
quickly take a bearing and locate the cell tower.
HINT:
You can also save this setting on one of the keys 0 to 9 as a custom “Hot-
key”. More on this on the following pages.
HINT2:
Using the Enter key, you can change between
Spectrum analysis
,
exposure limit calculation
and
audio reproduction
modes at any time.
Though, as UMTS is an unpulsed signal, audio mode does not make sense
here.
Further tips and information regarding the configuration of a custom fre-
quency range and other main menu entries can be found on the following
pages covering the main menu.
6.0 Setting a custom frequency range
20
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
Summary of Contents for SPECTRAN HF-2025
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