I am attempting to make my first measurements (frequency response etc.) with my laptop sound card from some amps i've built.
i want to reduce the amp output (high voltage) to line level so i can run it back to my sound card's line-in for evaluation.
the amps output is also attached to a resistor load (8 or 4 ohm)
i have a 100X oscilloscope probe and i was wondering if i could just use the probe to scale down the amps signal (amp max output voltage peak to peak is about 40 volts) or should i take some other measures to protect the sound card?
for example, will turn on surges be a problem and should i therefore be concerned about the order in which i hook things up/turn things on?
additionally, is the DC offset (25-75mV) of the amp potentially harmful to the sound card? Could i run the amp output through my ac coupled oscilloscope remove any DC?
thanks.
i want to reduce the amp output (high voltage) to line level so i can run it back to my sound card's line-in for evaluation.
the amps output is also attached to a resistor load (8 or 4 ohm)
i have a 100X oscilloscope probe and i was wondering if i could just use the probe to scale down the amps signal (amp max output voltage peak to peak is about 40 volts) or should i take some other measures to protect the sound card?
for example, will turn on surges be a problem and should i therefore be concerned about the order in which i hook things up/turn things on?
additionally, is the DC offset (25-75mV) of the amp potentially harmful to the sound card? Could i run the amp output through my ac coupled oscilloscope remove any DC?
thanks.