Quote from
AdminTC on 22/09/2021, 12:22
The analog video standard "PAL" is a very interesting and a great use case to show the performance of the SPECTRAN V6 and the RTSA Suite PRO software.
We used a recorded PAL signal that we received via the File Reader block. Since the recoding was taken with 120MHz IQ bandwidth we extracted only the quite small PAL signal from it with the help of the IQ Demodulator block to offer a better frequency resolution:
PAL consists of two interlaced frames with a duration of 20ms each. If we set the Pulsed Waterfall block to those 20ms we get a perfect stable signal.
We use the same frame length within the IQ Oscilloscope block:
Optimizing the FFT will offer us a higher time domain resolution so we can see the PAL frame much better:
Setting the FFT lower will give us a higher time domain resolution so we can see the single lines even with a duration of 64µs (64us * 312.5 = 20ms) each:
With the help of the IQ Oscilloscope we can extract one of those lines with a duration of 64µs in a much higher detail:
Since the IQ Oscilloscope is running independently we can even generate a mix display showing the lines (64µs) within the IQ Oscilloscope and the whole frame (20ms) within the Waterfall display:
The analog video standard "PAL" is a very interesting and a great use case to show the performance of the SPECTRAN V6 and the RTSA Suite PRO software.
We used a recorded PAL signal that we received via the File Reader block. Since the recoding was taken with 120MHz IQ bandwidth we extracted only the quite small PAL signal from it with the help of the IQ Demodulator block to offer a better frequency resolution:
PAL consists of two interlaced frames with a duration of 20ms each. If we set the Pulsed Waterfall block to those 20ms we get a perfect stable signal.
We use the same frame length within the IQ Oscilloscope block:
Optimizing the FFT will offer us a higher time domain resolution so we can see the PAL frame much better:
Setting the FFT lower will give us a higher time domain resolution so we can see the single lines even with a duration of 64µs (64us * 312.5 = 20ms) each:
With the help of the IQ Oscilloscope we can extract one of those lines with a duration of 64µs in a much higher detail:
Since the IQ Oscilloscope is running independently we can even generate a mix display showing the lines (64µs) within the IQ Oscilloscope and the whole frame (20ms) within the Waterfall display:
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