Manual SPECTRAN V5
© Aaronia AG 2016 | www.aaronia.com
18
FUNCTIONS
4.2.2. Span (frequency range)
Default: 44MHz
Span determines the frequency range for the measurement.
The afore mentioned center frequency is not affected. In-
stead in case of changes to the span, the „Start/Stop-fre
-
quency“ will automatically be adjusted to retain the Span.
The Span function is comparable with a „magnifier function“,
which, however, only works on the X axis.
In real time mode the Span cannot be chosen freely. In-
stead the following fixed REAL TIME bandwidths can be
chosen due to the internal filter matrix:
175MHz (Optional)
88MHz (Optional)
44MHz
22MHz
11MHz
5,5MHz
2,7MHz
1,09MHz
547kHz
219kHz
109kHz
54,7kHz
21,9kHz
10,9kHz
5,47kHz
2,19kHz
If you enter a „wrong“ Span, the next closest Span will
be chosen automatically. For example if you enter 40MHz
Span, 44MHz will be chosen automatically.
Example:
Enter middle frequency „2450“ MHz, then:
Enter 40MHz Span
measuring range = 2.440MHz to 2.460MHz
Enter 200kHz Span
measuring range = 2.439,9MHz to 2.440,1MHz
An enlargement / reduction of the resolution is always „centered“ around the middle frequency.
The grid display allows for a rapid frequency allocation of the individual signal sources, since a
box always corresponds to 1/10 of the set span.
