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G E T T I N G
S T A R T E D
by simply clicking on the trace. Fine-tune a marker's placement using your
mouse wheel.
PEAK moves the marker to the highest amplitude signal on the graticule.
⇒
DELTA anchors the marker's reference (e.g. 1R) at the marker's current
⇒
position. Move the marker by left-clicking and/or using the mouse wheel to
make differential measurements relative to the reference.
UPDATE ON/OFF When Update is ON, the marker's amplitude
⇒
updates each sweep. When OFF, the marker's
amplitude does not update unless it is moved.
OFF turns the marker off and back to default
⇒
settings.
MKR to CF sets CENTER FREQUENCY to the current marker position.
⇒
MKR to REF LVL sets the REFERENCE LEVEL to the current marker
⇒
position.
2.2.5
BANDWIDTH CONTROLS
Res BW: This controls the resolution bandwidth (RBW). For each span, a
⇒
range of resolution bandwidths may be used. The resolution bandwidth
controls the Intermediate Frequency (IF) bandpass filter.
o Resolution bandwidths are available from 0.1 Hz to 250 KHz,
typically in powers of 2. A 5 MHz RBW is also available for
limited functions.
o The SPAN (stop - start frequencies) will affect which RBWs are
available.
o The SPAN and RBW determine the number of data points in a
sweep, roughly 2.5 x SPAN/RBW.
Video BW: This controls the video bandwidth (VBW). After the signal has
⇒
been passed through the RBW filter, it is converted to an amplitude. This
amplitude is then filtered by the Video Bandwidth filter.
implemented as a simple "rectangle" averaging window.
o Video bandwidths are available from 0.1 Hz to 250 KHz,
typically in powers of 2. VBW must be equal to or less than
RBW.
7
The marker sequence of
OFF, PEAK, DELTA
is good for reliable dBc
measurements.
This is
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