1、Capture the complete waveform of the signal and perform calculations:
Is it possible to choose an analog acquisition card with 250KS/s sampling rate to display the required waveform?
Not really. We have not yet considered the measurement accuracy of 0.1%.
Because the analog signal is the continous and the signal period is 1/(22.5K)=44.4us,duty cycle accuracy requires to be 0.1%, .signal resolution should be at least 44.4us/1000=44.4ns,and sampling rate should be larger than 1/44.4ns=22.5MS/s, then we can get the waveform that meet the accuracy requirements. In case the waveform can be measured to meet the accuracy requirement.
2、Convert the analog signal into a digital signal and use pulse counting to calculate its duty cycle:
Convert a 60V analogue pulse signal into a digital pulse signal and use pulse counting to measure the duty cycle of this signal.
If the digital signal is a 0 or 1, this sampling requirement is different from the analogue sampling requirement.
Why will happen if set output impedance to "high impedance" and then reverts to 50Ohm after a while?
This may happen because the user have changed the voltage units when setting the voltage value parameter. When the user selects dbm, it only corresponds to a 50Ω output impedance.