Manual SPECTRAN V5
© Aaronia AG 2016 | www.aaronia.com
20
FUNCTIONS
4.2.4. Bandwith
(Bandwidth) Default: 200kHz (only SOFT mode)
Bandwith (Bandwidth) simultaneously sets the level of detail
and sensitivity.
In real time mode this function cannot be
set manually, instead the bandwidth is calculated auto-
matically from the Span. The formula here is Span/220 =
Bandwidth. So for a Span of 44MHz the bandwidth cor-
responds to 200kHz.
For a high bandwidth the measurement is fast, but the dis-
play is relatively inaccurate and the sensitivity is relatively
low. Weak signals can no longer be recorded.
The smaller the bandwidth, the longer the measurement, but
the more accurate the display and weaker signals can be
displayed. For example, a signal, previously measured with
a high bandwidth, might turn out to be multiple, narrow band
signals lying closely together when measured with a lower
bandwidth.
The bandwidth can still not be selected in SOFT mode.
4.2.5. SweepTime
(Sweep time) Default: 10mS (only in SOFT mode)
Determines the measurement period. The higher the sweep
time the more accurate the measurement, but the longer the
measurement period.
This item is disabled in real time mode, because that
mode always measures with the maximum sweep time.
Please note: A faster sweep time, depending on SPAN and
RBW, is not always implemented since the hardware may
not. Therefore the sweep time should be no less than 5 mS.
