Preparation |
Swept Analysis
7
The
rear panel
has three connectors:
1.
10 MHz Reference input / output. Use a clean
10 MHz reference sine wave or square wave with >0
dBm level. A +13 dBm sine wave input or 3.3V CMOS
clock input is recommended.
2.
A USB 3.0 Micro-B female connector. Use the
Y-cable provided to connect the device to your PC.
3.
A multi-purpose BNC connector, primarily for
trigger input, including GPS 1 pulse per second (PPS)
trigger and external trigger in zero span mode. See the BB60C API manual for additional
information on using GPS time stamping with streaming I/Q data
Both BNC connectors are also capable of outputting logic high and low using the API. Modes of
Operation
The BB60C is a hybrid superheterodyne-FFT spectrum analyzer. The BB60C is a combination of swept-
tuned and FFT based analyzers. The BB60C uses an oscillator and band-pass filters to down-convert a
portion of the input spectrum into an intermediate frequency (IF). The intermediate frequency is then
sent from the device to the host PC where it undergoes FFT spectrum analysis transforming the input IF
into a frequency spectrum. The resulting IF contains 27MHz of usable bandwidth.
The BB60C is also a real-time spectrum analyzer. This means the device is capable of continuously
streaming the IF frequency with no time gaps. Having no time gaps is critical for measurements and tests
requiring high probability of intercept (POI). See the section below
Real-Time Spectrum Analysis
for a
more in-depth discussion of the BB60C capabilities.
The BB60C offers multiple modes of operation. Most of these are exposed in the software and others
can be exposed through our C-based API. We will only cover those in our software here.
SWEPT ANALYSIS
2.5
This mode of operation is the mode which is commonly associated with spectrum analyzers. Through
the software you will configure the device and request the device perform a single sweep across your
desired span. Spans larger than 20MHz are the result of acquiring multiple 20MHz patches and
concatenating the results of the FFT processing on each.
The processing performed on each 20MHz patch is determined by the settings provided. Each time a
trace is returned, the device waits until the next trace request. For you, the software user, you can
choose to continuously retrieve traces or manually request them one at a time with the
Single
and
Continuous
buttons found on the
Sweep Toolbar.
Содержание BB60C
Страница 1: ...BB60C Spectrum Analyzer User Manual...
