G E T T I N G S T A R T E D
o Non-Native resolution bandwidths are available from 10 Hz to 10 MHz, in a 1-3-10
sequence. (e.g. 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, … ) when using the arrow
keys.
o In Real-Time mode, only native bandwidth values are allowed ranging from 2.4
kHz to 631 kHz in powers of two.
VBW – 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.
o All RBW choices are available as Video Bandwidths, with the constraint that VBW
must be less than or equal to RBW.
o In Real-Time mode VBW is not selectable.
Auto RBW – Having auto selected will choose reasonable and fast RBWs relative to your
span. If you will be changing your span drastically, it is good to have this selected along
with Auto VBW.
Auto VBW – Having auto VBW selected will force VBW to match RBW at all times. This
is for convenience and performance reasons.
Acquisition Controls 3.2.2.4
Video Units – In the system, unprocessed amplitude data may be represented as voltage,
linear power, or logarithmic power. Select linear power for RMS power measurements.
Logarithmic power is closest to a traditional spectrum analyzer in log scale.
Video Detector Settings - As the video data is being processed, the minimum, maximum,
and average amplitudes are being stored. You have a choice of which is to be displayed.
Sweep Time – In Zero-Span mode, sweep time represents the total amount of time
displayed in the graticule, rounded to the nearest sample. In sweep mode, Sweep Time is
used to modify how long the BB60 dwells on each patch of spectrum. The actual sweep
time may be significantly different from the time requested, depending on RBW, VBW, and
span settings, as well as hardware limitations.
Self-Cal – The BB60 device is temperature sensitive. The software updates these
temperature calibrations when it sees a 2°C change in temperature. To manually recalibrate
the device for temperature changes at any time, use this control.
Demod Settings 3.2.3
The Demod Settings control panels allows configuration of zero-span captures.
Capture Settings 3.2.3.1
Input Power – Expected input power of the signal. Input power controls the reference
level and the gain and attenuation. It is suggested to keep gain and attenuation set to Auto
so the software can best choose them based on Input Power.
Center – Specifies the tuned center frequency of the capture, or in another way, the 0Hz
frequency of the IQ data capture.
Gain – Controls the internal device amplification. It is recommended to keep this value set
to Auto.
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