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7.3.2 Real-time Bandwidth
When displayed locally, the real-time bandwidth is 15MHz. The spectrum
of receiver only works in real-time bandwidth's range, and SPAN is
continuously adjustable. When spectrometer's SPAN is set to less than 15MHz,
it's real-time spectrum, while when SPAN is over 15MHz, it becomes spliced
spectrum.
The max real-time bandwidth is around 38MHz and the sample rate is
40M while using IQ data output.
7.3.3 Demodulation Bandwidth
The range is 150Hz-300kHz, it's continuously adjustable under the setting
of 3 effective digits. The machine offers commonly used bandwidth list for
users to select.
7.3.4 Recording Bandwidth
While recording IQ data to TF card, the sampling rate of IQ data is relevant
to demodulation bandwidth, and usually this value is 1.2x-2x of demodulation
bandwidth. With demodulation bandwidth under 200kHz, IQ data can be
written to TF card instantaneously. The only limitation the capacity of TF card,
and there is no max recording time limit. When the demodulation bandwidth
is larger than 200kHz, IQ data would be written to DDR memory first, then
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