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4.1 Menu operating mode
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Fig. 5 Menu operating mode
The operating mode spectrum analyser is selected
and can be switched on with the button ENTER. Then
the spectrum is displayed.
The operating mode WiFi analyser (chapter 5) can
be selected with the button ▼ or ▲ and ENTER when
the frequency range "15 – 2700 M" has been selected
in the lower line "Module" of the frequency menu
(chapter 4.2). Otherwise the message "THIS FEA-
TURE IS NOT AVAILABLE IN THE SELECTED
MODE" is displayed. In this case return to the menu
operating mode with the button ENTER.
The operating mode "RF Generator" is not avail-
able for this model. When selecting it, the message
"THIS FEATURE IS NOT ..." is likewise displayed.
4.2 Frequency menu
Fig. 6 Frequency menu
This menu which allows to change frequency settings
is probably the menu most used.
When, after switching-on the RF EXPLORER, the
spectrum is displayed and the button MENU is
pressed twice, the frequency menu appears. How-
ever, this procedure is changed in the following. Each
time the button MENU is pressed while the spectrum
is displayed, the last menu called appears. Thus, time
is saved as it is not necessary to navigate through all
menus to return to the previous one.
There are two different methods to change the fre-
quency range shown in the spectrum display:
1. Center Freq and Freq Span
This is the usual spectrum analyser adjustment all
experts are familiar with. The center frequency
(Center Freq) of the frequency band to be analysed
is adjusted and then the bandwidth (Freq Span).
2. Start Freq and Stop Freq
Only a few spectrum analysers offer this user-
friendly method. The lower frequency (Start Freq)
and the higher frequency (Stop Freq) of the fre-
quency range to be analysed are adjusted.
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When Center Freq and Freq Span are adjusted, Start
Freq and Stop Freq are changed accordingly and vice
versa. In general, Center Freq / Freq Span are ad-
justed when the frequency is known and Start / Stop
Freq to check a certain range.
To go to an option, use the buttons ▲ and ▼. Then
press the button ENTER to be able to edit the option.
Go to the place to be changed with the button ◀ or ▶.
Adjust the desired value with the button ▲ or ▼ and
confirm the adjustment with the button ENTER or can-
cel it with the button RETURN.
In the line Module select the frequency range
240 – 960 MHz or 15 – 2700 MHz to be analysed with
the button ENTER. In the range of 240 – 960 MHz
minor signals to -120 dBm can be measured. In the
range 15 – 2700 MHz, measurements to -100 dBm
only are possible due to the large frequency range
and the higher background noise resulting.
Note: The bandwidth can be adjusted between 0.112 MHz
and 100 MHz. The lowest and highest frequencies which can
be adjusted depend on the adjustments in the menu lines
"Freq Span" and "Module".
Example for changing the bandwidth to 6.5 MHz; the
lower and higher frequencies are automatically up-
dated compared to fig. 6:
Fig. 7 Bandwidth 6.5 MHz
Exit the menu with the button RETURN and return to
the spectrum display.
Fig. 8 Spectrum display
with bandwidth 6.5 MHz
The new frequency range is adjusted. As a further
example, repeat the procedure to change the band-
width to 2.5 MHz. For this purpose press the button
MENU again: The previous menu option (Freq Span) is
selected. Change the value to 2.5 MHz and confirm with
the button ENTER. Then press the button RETURN to
return to the spectrum display.
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RETURN
Fig. 9 The bandwidth is changed to 2.5 MHz
The new frequency range is adjusted but what is inter-
esting now is that the center frequency can also be
changed with no need to call the frequency menu. For
this purpose press the button ◀ or ▶ (repeatedly)
when the spectrum is displayed: Each time the center
frequency is reduced or increased by
width, i. e. at a bandwidth of 2.5 MHz by 0.3125 MHz
by just pressing a key. This direct method is especially
useful with a narrow bandwidth.
During the spectrum display the measuring values
and the measuring curve can be frozen by pressing
the button ENTER. This facilitates the reading for val-
ues rapidly changing. In this case, the indication HLD
next to the Y axis is flashing. To return to the present
values, press the button ENTER again.
The frequencies of the scan range are indicated at the
X axis. Alternatively to this, the bandwidth (SP), the
centre frequency (C) and the resolution bandwidth
(RBW) can be indicated. To switch over, press the but-
ton RETURN. When the button ◀ or ▶ is now pressed
(repeatedly), it is not the centre frequency which is
changed but the bandwidth. Thus, the bandwidth can
also rapidly be changed without calling the menu.
4.3 Attenuator menu
This menu allows to change the level display in the
Y axis. To call the menu, press the button MENU
repeatedly until the menu is displayed.
Fig. 10 Attenuator menu
This menu has some interesting options:
Calculator: offers five modes for the level display. To
change the mode, press the button ENTER.
Max: The peak values of the last frequency band
scan iterations [sweeps] (see menu option below)
are used, in this case the peak values of the last
4 scans. This is the standard mode by which rap-
idly changing RF signals may be detected or the
channel assignment can be found in difficult cases.
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