Quick Zero-span sweep (Time Domain Mode)
A quick measurement at a fixed frequency almost in realtime is achievable with
the so-called zero-span. Should you have found a signal on e.g. Hotkey 7
(GSM900), simply set the correct center-frequency using the cursor. Now, set
Span
to “0” and
SpTime
to “0.05”. The level at the center frequency is now con-
tinuously and quickly being updated incl. time domain display!
Optimal for taking bearings and finding maximums using the “panning
approach”.
50MHz “turbo” sweep
Quick measurement of big frequency spans is possible using the 50MHz filter.
Set
RBW
to “FULL” (50MHz) and
SpTime
to “0.05”. The sweep now can take
less than a second, even with bigger frequency ranges. Of course, the frequen-
cy and level display is now only a very coarse approximation due to the extreme
filter bandwidth and some noise can show up. Also, levels must now be above
-45dBm
or even much higher
(depending on frequency) to still be recognized.
Still, a great feature for a
coarse overview
.
Measurements without aliases (phantom signals)
Aliases (phantom signals) can be almost completely suppressed using certain
settings. As soon as you set
SpTime
to “1” or higher AND use an
RBW
setting
from 300kHz-3MHz, an ADDITIONAL “Anti-aliasing interleave sampling algo-
rithm” is being added which almost completely eliminates the aliases. Though,
this filter is obviously not available in PULSE mode.
Allocate keys with your own parameters
The keys 0 to 9 can be allocated with custom configurations (incl. start/stop fre-
quency, RBW etc.). For this, program numbers 100 to 109 correspond to the
keys 0 to 9. Simply store the current configuration via the
Setup
&
Store
menu
entries using one of these program numbers, and they will be available at any
time using the corresponding key. It’s even easier with our free PC analysis soft-
ware “LCS”. Here you can even attach info texts. To recall the factory settings,
select “Factor” under the “Setup” menu.
Force display of the used physical unit
After leaving the main menu and after the first complete sweep, the physical unit
(dBm, V/m, A/m or dBµV) is displayed in the big info field. As soon as you press
a hotkey, however, the display is being overwritten by the hotkey’s info text. By
pressing the menu button twice, however, you can force redisplay of the unit.
9.0 Tips and tricks
35
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